Solving problems caused by sinking and cavities! Case study of cavity filling in footings by Teratech.
We would like to introduce a case where the problems of sinking and voids under bridge approach slabs were resolved using the Teratec method. The "Teratec method" is a technique that fills the "voids" under bridge approach slabs caused by ground subsidence or groundwater, allowing for the restoration of road functionality to a healthy state in a short period of time. 【Problems Encountered】 On a national highway in Ibaraki Prefecture, voids had developed under the approach slabs due to the Great East Japan Earthquake. The dimensions of the approach slab were 8m x 8m, with a maximum void thickness of about 10cm. Restoration was necessary for safety reasons. 【Reasons for Choosing Teratec】 - Short construction period, which reduces stress for road users due to traffic congestion. - The lightweight materials help suppress re-sinking. 【Feedback After Construction】 Traffic regulations allowed for alternating one-lane traffic, and the construction was completed in one day during daylight hours. The construction vehicle used was a 4-ton truck (L=5.6m). Compared to conventional methods, this was a small-scale project that was completed quickly. *For more details, please visit the external link page or feel free to contact us. https://teretek.jp/plus/case/bridge Toll-free number: 0120-873-835
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【Construction Details】 ■ The material used for filling cavities is a special polyurethane resin (Teratec). ■ After drilling a hole with a diameter of 17.5mm, an injection pipe is inserted, and Teratec resin is injected. ■ To ensure the cavity is completely filled, injection is performed at intervals of 1.5m. ■ The resin expands immediately, filling the cavity and using the load from the footing slab as a counterforce to compact the loosened ground. ■ Once the ground is compacted to withstand the load from the footing slab, the slab is lifted. ■ During construction, the behavior of the footing slab is measured, and injection is completed when it is confirmed that the road surface in the injection area has lifted by approximately 1mm. *For more details, please refer to the external link page or feel free to contact us. https://teretek.jp/plus/case/bridge Toll-free number: 0120-873-835
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For more details, please refer to the external link page or feel free to contact us. Toll-free number: 0120-873-835
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The main business activities of Mainmark involve "returning tilted floors and buildings to a level state" and "preventing existing floors and buildings from tilting." We primarily offer the "TerraTech Method," which allows us to level tilted floors without stopping operations, and we provide various construction proposals tailored to our customers' concerns, from investigation to execution. ■ Nationwide responsible construction with over 5,000 completed projects Mainmark has established offices in eight locations across the country and conducts responsible construction nationwide. We serve a wide range of clients, including factories, stores, warehouses, offices, and apartments. ■ Non-disruptive floor tilt and subsidence correction method "TerraTech Method" Our main service, the "TerraTech Method," is a patented technique that injects TerraTech resin (rigid polyurethane foam resin) into concrete floors that have developed tilts, subsidence, steps, or voids due to ground subsidence or earthquakes. The expansion force of the resin levels the sunken floor and fills the voids beneath it. This technology is also registered with the Ministry of Land, Infrastructure, Transport and Tourism's "NETIS," ensuring its reliability. Patent No. 4896949 "Method for Correcting Sunken Floors" NETIS Registration No. "QS-080007"
