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Construction method×近藤建設 - List of Manufacturers, Suppliers, Companies and Products

Construction method Product List

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Cobra method

Cobra method

Full soil type compatibility from ordinary soil to bedrock! Economical due to starting from small piles.

This technology is a small-diameter pipe jacking method that enables construction on a wide range of ground conditions, from ordinary soil to gravel, cobblestones, and bedrock, thanks to its high torque performance leading conductor. It easily crushes cobblestones and bedrock. The mud-water process is completed in one step, making it very fast. Additionally, the equipment is compact, taking up little space. All components related to the work, including a mud-water treatment device that can be mounted on a vehicle and a divisible main body, are designed to be small and space-saving. 【Features】 ■ Compatible with all soil types from ordinary soil to bedrock ■ Economical due to starting from small piles ■ Achieves speedy jacking with a one-step process ■ Wide adaptability to soil types ■ Realizes miniaturization of the shaft *For more details, please refer to the PDF document or feel free to contact us.

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Two-way construction method

Two-way construction method

The basic system is a mud-based method. It is a construction method considering the installation type thrusting construction for existing underground structures.

This technology sends high-concentration mud water to the cutting edge and applies a mud water pressure of 2 meters above the groundwater level, preventing the collapse of the excavation profile and allowing for excavation within the ground. There are two construction methods available: the "retrievable type," which assumes the excavation machine body will be pulled up after construction, and the "remaining type," which is designed to utilize the excavation machine body as a pipeline. It can accommodate sharp curve construction and long-distance pushing without the need for auxiliary methods or equipment. 【Features】 ■ The basic system is mud concentration type ■ Both "retrievable type" and "remaining type" can be chosen ■ Accommodates curves and long distances ■ Supports low cover construction ■ Prevents collapse of the excavation profile, allowing for excavation within the ground *For more details, please refer to the PDF materials or feel free to contact us.

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Pipe Rehabilitation Method

Pipe Rehabilitation Method

A strong composite pipe has been constructed that integrates existing pipes, backfill materials, and profiles. It restores the functionality of the pipeline.

This technology is a method that allows for the rehabilitation of various aging pipelines, such as those used for sewage, agricultural water, and industrial drainage, without excavation. A pipeline is formed inside the existing aging pipes using hardened PVC profiles, and a backfill material is injected into the gaps. Since it can be constructed "while flowing water through any cross-sectional shape without excavation," it has minimal impact on traffic and citizens' lives. Additionally, both construction time and costs can be significantly reduced compared to traditional excavation methods, making it highly suitable for modern social and economic environments. 【Features】 ■ Can rehabilitate various aging pipelines without excavation ■ Minimal impact on traffic and citizens' lives ■ Significant reduction in both construction time and costs compared to excavation methods ■ Contributes to cost reduction and shortening of construction time with methods tailored to each construction site's environment *For more details, please refer to the PDF materials or feel free to contact us.

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Introduction to the "Advancement Construction Method"

Introduction to the "Advancement Construction Method"

We will respond with various construction methods suitable for different situations and ground conditions with a diverse range of variations.

Our company conducts various "pushing methods," including the Cobra method and pipe return method. In particular, regarding pushing construction, we have accumulated various efforts, continuous pursuit, and construction achievements. Please feel free to contact us if you have any requests. 【Lineup】 ■ Cobra Method ■ Pipe Return ■ Uncle Mall ■ Envi Liner *For more details, please download the PDF or feel free to contact us.

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Pipe return method

Pipe return method

Wide compatibility with construction conditions, soil types, and underground obstacles! Can be connected to existing pipes and existing manholes, etc.

This technology is a method that can extensively accommodate construction that is impossible with conventional methods, such as bit replacement during excavation according to changes in soil conditions and direct connection to existing pipes. Bits, steel pipes, and excavation methods that correspond to soil conditions can be selected. Ground improvement can be carried out from within the leading body. Additionally, the advancement of electronic devices has enabled a highly precise surveying management system. Direction correction and accuracy management can be performed in real-time. 【Features】 ■ The thrust pipe remains in place while the excavator can retract and be reinserted after being reduced in size. ■ The launch base and arrival shaft can be in small spaces. ■ A variety of excavation and soil removal methods can be selected. ■ All-direction excavation is possible. ■ Long-distance excavation of up to 300 meters is possible. *For more details, please refer to the PDF materials or feel free to contact us.

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Envi-liner method

Envi-liner method

The construction extension has reached a total of 4,930 km, boasting a high track record with the same type of construction method.

This technology is a non-excavation small-diameter pipe jacking method capable of constructing various types of pipes ranging from φ150 to φ1000. Using a jacking machine installed in the launch shaft, the buried pipes are sequentially laid towards the receiving shaft, eliminating the need to excavate the road surface. Additionally, the jacking device is designed to be compact, allowing for launching from small shafts. Since it uses a digging and soil removal method, there is no need for large surface facilities like those used in slurry methods, and the equipment associated with the work, such as cranes and generators, can be small-scale, contributing to overall cost reduction. 【Features】 ■ Capable of constructing various types of pipes from φ150 to φ1000 ■ Non-excavation construction ■ Suitable for difficult ground conditions ■ Small space and low cost ■ No need to excavate the road surface *For more details, please refer to the PDF materials or feel free to contact us.

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Ace Mall Method

Ace Mall Method

Clearing a wide range of soil conditions! Introducing pipe jacking technology that takes the Earth's environment into consideration.

This technology employs a mud pressure excavation and discharge mechanism along with a unique position measurement system, achieving high-precision long-distance and curved advancement across a wide range of soil conditions from soft ground to bedrock. Additives are injected into the excavated soil, turning it into mud and pumping it up to the vertical piles. By controlling the amount of mud taken in, some is left in the ground to prevent the collapse of the face and pit walls, while the lubricating effect of the mud (slurry) reduces the driving force. 【Features】 ■ Clears a wide range of soil conditions ■ Achieves long-distance and curved advancement *For more details, please refer to the PDF document or feel free to contact us.

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Ramsas Method

Ramsas Method

The soil removal method is vacuum suction! A variety of cutter heads tailored to the soil type are available.

The technology creates a method that forms a mud film on all excavation surfaces and constructs a highly stable tail void through approximately 25mm of overcut and the action of high-concentration mud water. The gravel is crushed within the chamber using a cone crusher and cutters driven by the outer circumference. Bit changes can be made from inside the machine, allowing for long-distance advancement. 【Features】 ■ A diverse lineup of cutter heads tailored to soil types (φ700 to 3,000) ■ The excavation method uses vacuum suction ■ Crushing capacity is 1-axis compressive strength of 350MN/m2 (RMS-GX type) ■ Bit changes can be made from inside the machine, allowing for long-distance advancement ■ The action of approximately 25mm of overcut and high-concentration mud water forms a mud film on all excavation surfaces while constructing a highly stable tail void *For more details, please refer to the PDF materials or feel free to contact us.

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Ramsas-S Method

Ramsas-S Method

The advanced curve construction is possible with the internal measurement system! The starting and arrival shafts are very small.

This technology is a construction method that allows for long-distance propulsion due to the vacuum excavation method. For diameters φ250 to 500, it can be divided into four parts (maximum dimension 925mm), and for φ600, it can be divided into three parts (maximum 1,325mm). Each nominal diameter is equipped with a compact jack for improved workability. Additionally, it allows for the construction of shafts in favorable locations, taking into consideration the surrounding environment. 【Features】 ■ A variety of cutter heads tailored to soil types (φ250 to 600) ■ The starting and arrival shafts are very small ■ Capable of long-distance starting ■ Advanced curved construction is possible with an in-pipe measurement system ■ Advanced curved construction is possible with an electromagnetic wave measurement system *For more details, please refer to the PDF document or feel free to contact us.

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