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In the vicinity of the planned construction site for a detached house (two-story lightweight steel frame) in Saitama Prefecture, trains frequently pass by, raising concerns about the impact of railway vibrations on the living environment. Therefore, the 'WIB method' was implemented directly beneath the house. Vibration measurements taken before and after the construction confirmed a vibration reduction effect of approximately 4 dB in the horizontal direction and about 6 dB in the vertical direction, effectively halving the railway vibrations. 【Case Overview】 ■ Construction Location: Saitama Prefecture ■ Client: Sanyu Soil Engineering Co., Ltd. ■ Vibration Source: Railway vibrations ■ Preservation Target: Houses along the railway ■ Countermeasure Work: Plate-type WIB method (honeycomb cell type) ■ Construction Position: Directly beneath the receiving side *For more details, please refer to the PDF document or feel free to contact us.

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In residential areas of Tokyo, vertical vibrations caused by passing trains were affecting the living environment. Therefore, during the reconstruction of the housing, the 'WIB method' was implemented directly beneath the residences. Vibration measurements on the ground were conducted before and after the countermeasures. As a result, a reduction of 4 to 5 dB in vibration was confirmed. 【Case Summary】 ■ Location: Tokyo ■ Client: Mitsui Home Co., Ltd. ■ Vibration Source: Railway vibrations ■ Preservation Target: Houses along the railway ■ Countermeasure Method: Plate-type WIB (honeycomb cell type) ■ Installation Position: Directly beneath the receiving side *For more details, please refer to the PDF document or feel free to contact us.

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Vibrations from trains passing near the residential development site in Kanagawa Prefecture (currently Fujisawa SST) raised concerns about their impact on the living environment after the construction of homes. In response, the 'WIB method' was implemented directly beneath each residence. Vibration measurements on the ground were conducted before and after the countermeasures. When evaluating the vibration levels for each type of train, an average reduction of 6 dB in the horizontal direction and 5 dB in the vertical direction was confirmed. [Case Overview] ■ Construction Location: Kanagawa Prefecture ■ Client: Ando & Associates Co., Ltd. ■ Vibration Source: Railway vibrations ■ Preservation Target: Residential buildings along the railway (total of 11 buildings) ■ Countermeasure Work: Plate-type WIB method (honeycomb cell type) ■ Construction Position: Directly beneath the receiving side *For more details, please refer to the PDF document or feel free to contact us.

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In residential houses along the roads in Tokyo, vibrations from large vehicles were propagating, and vertical vibrations were affecting the living environment. Therefore, during the reconstruction of the houses, the 'WIB method' was implemented directly beneath the residences. Vibration measurements were conducted before and after the countermeasures within the buildings. As a result, a reduction of 3-6 dB on the first floor and 4-5 dB on the second floor was confirmed, leading to an improvement in livability. 【Case Summary】 ■ Location: Tokyo ■ Client: Sekisui Heim Corporation ■ Vibration Source: Road traffic vibrations ■ Preservation Target: Houses along the road ■ Countermeasure Method: Plate-type WIB (honeycomb cell type) ■ Installation Position: Directly beneath the receiving side *For more details, please refer to the PDF document or feel free to contact us.

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Some plots of a residential development in Saitama Prefecture face a railway, raising concerns about the impact on the living environment after the construction of houses. Therefore, the 'WIB method' was implemented directly beneath the houses. Vibration measurements were conducted before and after the countermeasures. Dominant vibrations in the range of 10-20Hz were reduced by 6-12dB (to 1/4 to 1/2 of the original vibrations), keeping the vibration level below 60dB. 【Case Summary】 ■ Location: Saitama Prefecture ■ Client: Housing manufacturer ■ Vibration source: Railway vibrations ■ Preservation target: Houses along the railway (total of 9 buildings; 5 buildings + 4 buildings) ■ Countermeasure work: Plate-type WIB method (honeycomb cell type) ■ Installation position: Directly beneath the receiving side *For more details, please refer to the PDF document or feel free to contact us.

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Some plots in a residential development area in Saitama Prefecture face a railway, raising concerns about the impact on the living environment after the construction of houses. Therefore, the "WIB method" was implemented directly beneath the houses. Additionally, to ensure greater vibration reduction, countermeasures were also implemented directly beneath the unused land. Vibration measurements were conducted before and after the countermeasures, resulting in a reduction of dominant vibrations in the 10-20Hz range by 10-14dB (to 1/5 to 1/3 of the original vibrations), keeping the vibration level below 60dB. [Case Overview] ■ Location: Saitama Prefecture ■ Client: House manufacturer ■ Vibration source: Railway vibrations ■ Preservation target: Residential buildings along the railway (a total of 4 buildings + unused land) ■ Countermeasure works: Plate-type WIB method (directly beneath the houses) and wall-type WIB method (directly beneath the unused land) honeycomb cell type ■ Construction position: Directly beneath the receiving side (beneath the houses) and along the propagation path (beneath the unused land) *For more details, please refer to the PDF document or feel free to contact us.

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The planned construction site for housing in Kanagawa Prefecture was experiencing traffic vibrations from the elevated bridge and the road in front of the site. As a countermeasure, we implemented measures directly beneath the apartment building. The vibrations from the elevated bridge were predominantly at 4Hz, while those from the road in front of the site ranged from 12.5 to 20Hz. We designed the 'WIB method' to address each type of vibration accordingly. As a result, we reduced the 4Hz vibrations by approximately 5dB and the 12.5 to 20Hz vibrations by about 10dB, ensuring that the vibrations did not affect the livability. [Case Overview] ■ Construction Location: Kanagawa Prefecture ■ Client: Housing Manufacturer ■ Vibration Source: Road Traffic Vibration ■ Preservation Target: Apartment Building (New, 3 Stories) ■ Countermeasure: Plate-type WIB Method (Honeycomb Cell Type) ■ Construction Position: Directly beneath the receiving side *For more details, please refer to the PDF document or feel free to contact us.

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Some plots of a residential development in Saitama Prefecture face a railway, raising concerns about the impact on the living environment after the construction of the houses. Therefore, the "WIB method" was implemented directly beneath the houses. In buildings D and E, where the vibration level exceeded 70dB before the measures were taken, the countermeasures were extended on the railway side to enhance the vibration reduction effect. After conducting vibration measurements before and after the measures, the dominant vibration at 10Hz was reduced by 6dB to 14dB (to 1/5 to 1/2 of the original vibration), successfully keeping the vibration level below 60dB. 【Case Summary】 ■ Location: Saitama Prefecture ■ Client: Housing manufacturer ■ Vibration source: Railway vibration ■ Preservation target: Residential buildings along the railway (total of 5 buildings) ■ Countermeasure: Plate-type WIB method (honeycomb cell type) ■ Installation position: Directly beneath the receiving side (partly on the propagation path) *For more details, please refer to the PDF document or feel free to contact us.

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Some of the residential development plots in Saitama Prefecture face a railway, raising concerns about the impact on the living environment after the construction of houses. Therefore, the 'WIB method' was implemented directly beneath each of the houses from Building A to Building E. Vibration measurements were conducted before and after the countermeasures. As a result, the dominant vibration at 10Hz was reduced by 14dB (to 1/5 of the original vibration), successfully keeping the vibration level below 60dB. 【Case Summary】 ■ Location: Saitama Prefecture ■ Client: Housing Manufacturer ■ Vibration Source: Railway Vibration ■ Preservation Target: Residential buildings along the railway (total of 5 buildings) ■ Countermeasure Work: Plate-type WIB (honeycomb cell type) ■ Construction Position: Directly beneath the receiving side *For more details, please refer to the PDF document or feel free to contact us.

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In Tokyo, residential buildings are located close to railways that run underground, raising concerns about the impact of railway vibrations on the living environment after the construction of new homes. To address this, the 'WIB method' was implemented directly beneath the residences. Since building support was necessary, support piles were also installed. After conducting vibration measurements before and after the implementation of the countermeasures, vibrations were reduced by 12 to 17 dB (from 1/7 to 1/4), successfully keeping the vibration level below 50 dB. 【Case Summary】 ■ Location: Tokyo ■ Client: Business owner ■ Vibration source: Railway vibrations ■ Preservation target: Residential buildings along the railway (underground) ■ Countermeasure method: Plate-type WIB (honeycomb cell type) ■ Installation position: Directly beneath the receiving side *For more details, please refer to the PDF document or feel free to contact us.

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At the model house along the road in Tokyo, large vehicles pass by approximately every five minutes during the day, raising concerns about the impact of traffic vibrations on the living environment. The 'WIB method' was implemented directly beneath the model house, achieving a vibration reduction of 10-12 dB (about 1/4 to 1/3 of the original vibration level). This installation is maintenance-free and semi-permanent, ensuring that even after the model house becomes a regular residence, a comfortable indoor environment free from vibrations will be maintained. 【Case Overview】 ■ Location: Tokyo ■ Client: Mitsui Home Co., Ltd. ■ Vibration Source: Road traffic vibrations ■ Preservation Target: Model house along the road ■ Countermeasure: Plate-type WIB method (honeycomb cell type) ■ Installation Position: Directly beneath the receiving side *For more details, please refer to the PDF document or feel free to contact us.

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At the model house along the main road in Chiba Prefecture, there were concerns about the impact of traffic vibrations on the living environment due to the proximity of a busy main road after the model house was newly constructed. The 'WIB method' was implemented directly beneath the model house, achieving a vibration reduction level of 12dB (about 1/4 of the original vibration). This model house is planned along a busy main road due to its appealing characteristics, but thanks to this construction, the traffic vibrations transmitted from the ground have been reduced, creating an expected quiet indoor environment suitable for the model house. 【Case Overview】 ■ Construction Location: Chiba Prefecture ■ Client: Tokyo Sekisui Heim Co., Ltd. ■ Vibration Source: Road traffic vibrations ■ Preservation Target: Model house along the main road ■ Countermeasure Method: Plate-type WIB (honeycomb cell type) ■ Construction Position: Directly beneath the receiving side *For more details, please refer to the PDF materials or feel free to contact us.

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The detached houses in Okayama Prefecture are close to a logistics center, and the front road sees a large number of heavy vehicles passing frequently 24 hours a day, raising concerns that these traffic vibrations could affect the living environment of the newly built houses. The 'WIB method' was implemented directly beneath the detached houses. This achieved an average vibration reduction of 5 dB (about 55% of the original vibration), resulting in a vibration reduction effect that exceeded expectations within a limited budget. Additionally, the front road is planned to be widened in the future, and its impact has been considered from this stage, ensuring that the ground will remain comfortable and safe for living in the future. [Case Overview] ■ Location: Okayama Prefecture ■ Client: Sanyu Soil Engineering Co., Ltd. ■ Vibration Source: Road traffic vibrations ■ Preservation Target: Detached houses near the logistics center ■ Countermeasure: Plate-type WIB method (honeycomb cell type) ■ Installation Position: Directly beneath the receiving side *For more details, please refer to the PDF document or feel free to contact us.

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During the construction of a temporary platform for the sluice gate work, a vibro hammer was used to install the pile bridge pier. The impact of vibrations on surrounding residential and commercial facilities was evaluated through simulation analysis using the two-dimensional finite element method (2DFEM). Based on these results, the client conducted explanations of the vibration impact to nearby residents and surrounding commercial facility owners before the construction began. Some vibration effects were observed in residential areas close to the vibration source at the start of the pile driving, but the overall impact on residential and commercial facilities was minimal, with only a very limited area affected. 【Case Overview】 ■ Client: A certain construction consultant ■ Analysis Period: January 2020 ■ Cost: 1.77 million yen (excluding consumption tax, analysis fee for five measurement lines) ■ Vibration Source: Pile driving vibrations from a vibro hammer ■ Analysis Content: Evaluation of vibration impact on residential areas around the sluice gate *For more details, please refer to the PDF document or feel free to contact us.

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In Shizuoka Prefecture, vibration countermeasures were required in areas where complaints about vibrations had been occurring during road renovation work. As a result, the 'WIB method' was implemented directly beneath the road. Before and after the countermeasures, driving tests were conducted using a 10-ton truck. Vibration responses were measured and compared at the boundary between public and private properties along the road, on the ground within the site, and on the second floor of buildings. It was found that vibrations around the dominant frequency of 6Hz were reduced, achieving an average reduction of 10dB in the horizontal direction and 20dB in the vertical direction. [Case Summary] ■ Location: Shizuoka Prefecture ■ Client: Imamura Group Co., Ltd. ■ Vibration Source: Road traffic vibrations ■ Preservation Target: Several houses along the road ■ Countermeasure Method: Plate-type WIB method (honeycomb cell type) ■ Construction Position: Directly beneath the vibration source *For more details, please refer to the PDF document or feel free to contact us.

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In Mie Prefecture, there were concerns that the construction vibrations from the new highway would propagate to nearby public facilities. As a countermeasure, the 'WIB method' was implemented directly beneath the construction vehicle road. After the measures were taken, running tests and impact tests using a backhoe were conducted, comparing the vibrations at the unprotected and protected locations. As a result, it was confirmed that the ground vibrations at the protected locations were approximately 6dB to 7dB lower than those at the unprotected locations, reducing the vibrations to less than half. 【Case Summary】 ■ Location: Mie Prefecture ■ Client: Tenox Co., Ltd. ■ Vibration Source: Construction work vibrations ■ Preservation Target: Nearby public facilities ■ Countermeasure: Plate-type WIB method (honeycomb cell type) ■ Installation Position: Directly beneath the vibration source *For more details, please refer to the PDF document or feel free to contact us.

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In Saitama City, Saitama Prefecture, traffic vibrations from the national highway were affecting the living environment along the route, leading to complaints from residents. As a countermeasure, tire shred with high damping material was filled in the grid. Renovation work was carried out on the side road that runs between the national highway and residential areas, and the 'WIB method' was implemented directly beneath the road. Vibration measurements were conducted before and after the countermeasures, confirming a reduction of 4-5 dB in the vertical direction near the boundary between public and private properties. 【Case Overview】 ■ Construction Location: Saitama Prefecture ■ Client: Saitama City ■ Vibration Source: Road traffic vibrations ■ Preservation Target: Several residential buildings along the national highway ■ Countermeasure Work: Wall-type WIB method (grid type) ■ Construction Position: Vibration propagation path *For more details, please refer to the PDF document or feel free to contact us.

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In Yamanashi Prefecture, with the establishment of new embankment roads, it became necessary to preserve the environment of residential areas along the route after the road opened. Therefore, the 'WIB method' was implemented directly beneath the road. A running test using a backhoe was conducted before and after the countermeasures (before road construction). As a result, a reduction of more than 10 dB was confirmed in both horizontal and vertical directions near the boundary between public and private land, and vibrations were reduced to less than one-third. [Case Summary] ■ Construction Location: Yamanashi Prefecture ■ Vibration Source: Road traffic vibrations ■ Preservation Target: Several residential buildings along the road ■ Countermeasure Work: Plate-type WIB (honeycomb cell type) ■ Construction Position: Directly beneath the vibration source *For more details, please refer to the PDF document or feel free to contact us.

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In Mie Prefecture, there were concerns that the construction vibrations from the new highway would propagate to nearby residences. Therefore, the 'WIB method' was implemented between the construction area and the houses. After the measures were taken, a running test with a backhoe was conducted, comparing the vibrations at the unprotected and protected locations. As a result, it was confirmed that the ground vibrations at the protected location were approximately 6dB lower than those at the unprotected location, effectively halving the vibrations. 【Case Overview】 ■ Location: Mie Prefecture ■ Client: Tenox Co., Ltd. ■ Vibration Source: Construction work vibrations ■ Protected Target: One nearby residence ■ Countermeasure: Wall-type WIB method (folding screen type) ■ Installation Position: Vibration propagation path *For more details, please refer to the PDF document or feel free to contact us.

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In Kanagawa Prefecture, traffic vibrations caused by large vehicles passing through the roads have been affecting the living environment along the routes, leading to complaints from residents. As a response, road improvement work was carried out, and the 'WIB method' was implemented directly beneath the road. Vibration measurements were conducted before and after the countermeasures. When comparing the vibrations at the boundary between public and private properties of four residential buildings along the road before and after the measures, an average reduction of 7 dB and a maximum reduction of 13 dB in the vertical vibration level Lmax were confirmed, resulting in improved livability. [Case Summary] ■ Location: Kanagawa Prefecture ■ Vibration Source: Road traffic vibrations ■ Conservation Target: Several residential buildings along the road ■ Countermeasure Work: Plate-type WIB method (honeycomb cell type) ■ Installation Position: Directly beneath the vibration source *For more details, please refer to the PDF document or feel free to contact us.

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The "WIB method" is a ground vibration mitigation technique that constructs a rigid plate-like or wall-like cellular structure (WIB structure) at the required depth underground using ground improvement piles. This method reduces environmental vibrations from road traffic, railways, construction work, factories, events, and seismic forces on structures during earthquakes. It consists of a replacement soil (isolation layer) that suppresses and blocks the propagation of ground vibration waves, and a cellular structure (damping layer) that absorbs and blocks vibrations. The sum of the isolation and damping effects achieves the vibration reduction target. Additionally, it simultaneously exhibits the effects of "vibration mitigation" (improving vibration environments and reducing seismic motion), "liquefaction countermeasures," and "uneven settlement countermeasures," thereby keeping the overall ground improvement costs low. 【Features】 - Usable for residential buildings, facilities, and roads - Reduces seismic forces on structures during earthquakes - Enhances the bearing capacity of soft ground, preventing building settlement and liquefaction - Keeps overall ground improvement costs low *For more details, please refer to the PDF document or feel free to contact us.*

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At Ishiguro Construction in Toyama Prefecture, road traffic vibrations from the surrounding roads of the steel manufacturing facility and operational vibrations from the truck scale within the facility were propagating to the cafeteria building on the same site, resulting in vibration issues. Therefore, during the reconstruction of the cafeteria building, the 'WIB method' was implemented directly beneath the building. After conducting vibration measurements before and after the countermeasures, it was confirmed that vertical vibrations within the cafeteria building were reduced by 8 to 11 dB. [Case Summary] ■ Location: Toyama Prefecture ■ Client: Ishiguro Construction Co., Ltd. ■ Vibration Sources: Road traffic vibrations, operational vibrations within the facility ■ Protected Target: Cafeteria building within the steel manufacturing facility ■ Countermeasure Method: Plate-type WIB (honeycomb cell type) ■ Installation Position: Directly beneath the receiving side *For more details, please refer to the PDF document or feel free to contact us.

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At Daiho Construction in Fukushima Prefecture, there were concerns about the impact of construction vibrations from the government office building on surrounding residences. In response, the "WIB method" was implemented around the government office building. After the measures were taken, vibration measurements were conducted to investigate the impact of construction work on the surrounding area. A comparison of vibration levels between untreated areas and those treated with the WIB method showed a reduction of over 6dB in both horizontal and vertical directions. The vibrations were halved. 【Case Summary】 ■ Location: Fukushima Prefecture ■ Client: Daiho Construction Co., Ltd. ■ Vibration Source: Construction work vibrations ■ Preservation Target: Residences around the government office building ■ Countermeasure: Wall-type WIB method (folding screen type) ■ Installation Position: Vibration propagation path *For more details, please refer to the PDF document or feel free to contact us.

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At SEIHA in Chiba Prefecture, vibrations from trains passing near medical facilities were interfering with operations involving precision equipment in medical rooms. In response, a 'WIB method' was implemented between the railway and the medical facility. A composite WIB design was created by utilizing existing underground vibration isolation walls, combining wall-like and slab-like structures. Based on the micro-vibration tolerance curve for precision equipment, target vibration reduction amounts and target reduction frequency bands were established. After the measures were implemented, vibrations in the target reduction frequency band were reduced to less than half, improving the operational environment. 【Case Summary】 ■ Location: Chiba Prefecture ■ Client: SEIHA Co., Ltd. ■ Vibration Source: Railway vibrations ■ Preservation Target: Precision equipment in medical facilities ■ Countermeasure Work: Wall-like WIB + Slab-like WIB ■ Construction Position: Vibration propagation path *For more details, please refer to the PDF document or feel free to contact us.

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At Mitsui Sumitomo Construction in Ehime Prefecture, vibrations caused by machinery operation within the manufacturing plant were propagating to the adjacent office building (a four-story steel structure), resulting in significant vertical vibrations accompanied by a rumbling phenomenon on the 3rd and 4th floors, necessitating environmental improvements. As a solution, a passageway for transport vehicles was constructed between the manufacturing plant and the office building, and the 'WIB method' was implemented directly beneath it. Vibration measurements conducted before and after the countermeasures showed a reduction of 10 dB on the 1st floor, while the rumbling phenomenon was eliminated on the 3rd and 4th floors, resulting in a reduction of 15 to 17 dB. Additionally, the vibration level, which exceeded 70 dB before the countermeasures, dropped to below 60 dB afterward, improving the working environment. 【Case Summary】 ■ Location: Ehime Prefecture ■ Client: Mitsui Sumitomo Construction ■ Vibration Source: Factory vibrations ■ Target for Preservation: Adjacent office building ■ Countermeasure Method: Plate-type WIB (honeycomb cell type) ■ Installation Position: Vibration propagation path *For more details, please refer to the PDF document or feel free to contact us.

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At Mitsui Home in Chiba Prefecture, there were concerns about the impact of vibrations on work within a medical facility being constructed along a road frequently used by large vehicles. Therefore, the 'WIB method' was implemented directly beneath the medical facility and the adjacent pharmacy. Based on evaluation criteria for micro-vibrations targeting precision equipment, a vibration reduction goal was set. As a result, dominant vibrations in the range of 10 to 20 Hz were reduced by 6 to 10 dB, achieving the vibration reduction target. 【Case Summary】 ■ Location: Chiba Prefecture ■ Client: Mitsui Home Co., Ltd. ■ Vibration Source: Road traffic vibrations ■ Preservation Target: Medical facility ■ Countermeasure: Plate-type WIB method (honeycomb cell type) ■ Installation Position: Directly beneath the receiving side *For more details, please refer to the PDF document or feel free to contact us.

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The construction site of a factory dealing with precision machinery in Kyoto Prefecture faces a road, raising concerns about the impact of vibrations from road traffic on operations and equipment within the factory. To improve the road traffic vibrations at the factory site to a vibration environment suitable for the normal operation of precision machinery, measures targeting micro-vibrations were implemented. Vibration tolerance limits (VC ranks) were set according to the types of precision machinery to be installed in the factory, and performance design was carried out to reduce vibrations in the dominant frequency range to the target values. After the measures were implemented, vibrations within the factory were reduced to 1/4 to 1/3, achieving the vibration reduction targets. 【Case Summary】 ■ Location: Kyoto Prefecture ■ Client: Tsumiya Metal Co., Ltd. ■ Contractor: Yuu Architectural Design Co., Ltd. ■ Vibration Source: Road traffic vibrations ■ Preservation Target: Precision machinery factory ■ Countermeasure Type: Plate-type WIB (honeycomb cell type) ■ Installation Position: Directly beneath the receiving side *For more details, please refer to the PDF document or feel free to contact us.

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At Maetani Architectural Office located in Osaka Prefecture, vibrations from demolition and transportation activities by a nearby metal recycling company were affecting the operation of precision machining equipment. Therefore, during the expansion of the factory, the 'WIB method' was adopted as a vibration countermeasure, and a design targeting micro-vibrations was implemented. An investigation into the vibration impact on the existing factory's precision machining equipment was conducted, and based on this data, the new factory was designed and constructed directly beneath the site. As a result, resonant vibrations in the range of 10 to 16 Hz were reduced by 6 to 14 dB (to 1/5 to 1/2 of the original vibrations), creating an environment suitable for the normal operation of precision machining equipment. 【Case Summary】 ■ Construction Location: Osaka Prefecture ■ Client: Maetani Architectural Office Co., Ltd. ■ Vibration Source: Demolition work vibrations ■ Preservation Target: Precision machining factory ■ Countermeasure Method: Plate-type WIB (honeycomb cell type) ■ Construction Position: Directly beneath the receiving side *For more details, please refer to the PDF document or feel free to contact us.

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At a certain company located in the Kinki region, there were concerns about the impact of vibrations from the internal roads on the new manufacturing plant being established. Since vibration-sensitive equipment is scheduled to operate within the factory, a quiet environment is required. As a vibration mitigation measure, the 'WIB method' was adopted, and a design targeting micro-vibrations was implemented. After the measures were taken, the perceived vibrations were reduced to 1/7 to 1/5 of the previous levels. The transmission of vibrations to the manufacturing plant was mitigated, creating an environment where the vibration-sensitive equipment could operate normally. 【Case Summary】 ■ Location: Kinki ■ Client: Certain Company ■ Vibration Source: Vibrations from internal factory roads ■ Preservation Target: Newly established manufacturing plant ■ Mitigation Method: Plate-type WIB (honeycomb cell type) ■ Installation Position: Directly beneath the receiving side *For more details, please refer to the PDF document or feel free to contact us.

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Our company measures environmental vibrations such as road traffic vibrations, railway vibrations, factory vibrations, construction work vibrations, and event vibrations, and conducts analysis and evaluation according to the purpose. In "Environmental Impact Assessment," we carry out vibration measurements of the target property, identify the vibration sources, and evaluate the impact of vibrations. We assess what kind of vibration impact the target property is experiencing based on evaluation guidelines tailored to the purpose. If it is determined that vibrations from current or future new sources exceed permissible limits in the target property or area, we obtain the necessary information for vibration reduction design from measurement data and design countermeasures. Additionally, we conduct vibration measurements after implementing countermeasures to confirm their effectiveness. 【Measuring Equipment】 ＜Accelerometer Pickup＞ ■NP-7310 ■VSE-15A ■VSE-15D *For more details, please refer to the PDF document or feel free to contact us.

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Our company conducts predictive analysis of ground vibrations caused by moving vibration sources such as road traffic and railways, as well as fixed vibration sources like factory machinery and concrete placing machines, using computer simulation. In the simulation analysis, we create a ground model that reflects local ground information and input excitation forces that reflect local vibration data to output response values. Before constructing structures that are vibration sources (such as roads, railways, and factories) or buildings that are vibration receivers (such as residences, offices, and public facilities), we can predict the vibration impact on the buildings after construction. [Information Required for Vibration Analysis Using Computer Simulation] ■ Ground information (geological data from boring penetration tests) ■ Vibration information (vibration data from vibration measurements) *For more details, please refer to the PDF materials or feel free to contact us.

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Differential settlement refers to the uneven application of the building's load on the ground, causing the building to tilt. When differential settlement occurs, it can lead to various issues in daily life, such as doors and windows not closing properly and health problems. By constructing a WIB structure within the ground, the rigidity of the WIB structure distributes the load into the ground, resulting in a structural form that increases the bearing capacity against the building load beyond the strength of the original ground at ultimate bearing capacity. Since the WIB structure is built with a planar spread, it can be designed to evenly distribute the loads from buildings and other structures. As a result, it can suppress differential settlement of the ground and improve the safety of the building. 【Features】 ■ Strengthening the ground serves as a foothold for suppressing differential settlement. ■ Designed to evenly distribute the loads from buildings and other structures. ■ Can suppress differential settlement of the ground and improve the safety of the building. *For more details, please refer to the PDF document or feel free to contact us.

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The "WIB Method for Liquefaction Countermeasures" protects buildings from damage caused by earthquakes and liquefaction. The basic structure consists of replacement soil that acts as a seismic isolation layer, ground improvement piles that function as a damping layer, and support ground improvement piles that support the building foundation. The ground improvement piles in the damping layer are constructed in a cellular shape, creating a strong and stable composite ground (non-liquefied layer). Additionally, by increasing resistance through the combined use of pile foundations and the WIB method, it is possible to reduce the number of piles or lower the grade of the piles, thereby rationalizing the design and leading to cost reductions. 【Features】 ■ Ground improvement piles in the damping layer are constructed in a cellular shape ■ Creates a strong and stable composite ground (non-liquefied layer) ■ During an earthquake, the cellular ground improvement piles restrain the soil inside the cells ■ Suppresses ground deformation and reduces seismic motion ■ Since liquefaction does not occur inside the cells, it blocks the propagation of liquefied mud water below, preventing surface liquefaction *For more details, please refer to the PDF materials or feel free to contact us.

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Various vibrations from road traffic, railways, factories, and construction work exist around us. These vibrations are often perceived as unpleasant and can negatively impact daily life. The "Vibration Mitigation WIB Method" addresses these vibration issues and creates a comfortable living environment. Additionally, the installation location and shape can be selected according to each property. 【Summary of Achievements (Partial)】 ■ Vibration Source: Road Traffic Vibration ■ Installation Location: Directly beneath the vibration source ■ WIB Method Type: Plate-type WIB Method (Honeycomb Cell Type) ■ Issue: Vibrations from large vehicles passing on the road propagate to nearby residences, leading to vibration complaints ■ Response: Road improvement work was carried out, and a honeycomb cell type plate WIB method was installed directly beneath the road. *For more details, please refer to the PDF document or feel free to contact us.

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E&D Tech Design Co., Ltd.'s "WIB Method" is an improved ground construction technique that reduces environmental vibrations from traffic, factories, and construction, as well as seismic shaking, while addressing liquefaction issues and enhancing and stabilizing the bearing capacity of weak ground. By using a rigid cell-type plate or wall structure, it simultaneously achieves liquefaction prevention and differential settlement prevention, allowing for overall cost reduction. Additionally, it can also address micro-vibrations that interfere with the operation of precision machinery and medical devices in high-tech industries. 【Features】 ■ Liquefaction prevention through strain suppression of the ground using a cell-form structure ■ Differential settlement prevention through improved horizontal bearing capacity of the ground using a plate structure ■ Prediction and design of vibration reduction values based on ground surveys, achieving set targets ■ Recipient of the Minister of Education, Culture, Sports, Science and Technology Award for Scientific and Technological Achievement in 2011 ■ Capable of addressing micro-vibrations that affect medical devices *For more details, please refer to the catalog or feel free to contact us.

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