近藤建設 List of Products and Services

This technology is a method that can rehabilitate various aging pipelines, such as sewer systems, agricultural water, and industrial wastewater, without excavation. A pipeline is formed inside the existing aging pipe using hardened PVC profiles, and a backing material is injected into the gap. Since it can be constructed "while flowing water in 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 construction time and costs compared to excavation methods ■ Contributes to cost reduction and shortening of construction periods with methods tailored to the environment of each construction site *For more details, please refer to the PDF materials or feel free to contact us.

• Special Construction Method

This technology sends high-concentration slurry to the cutting edge and applies a slurry 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 main excavation machine will be pulled up after the thrust construction, and the "remaining type," which is designed to utilize the main excavation machine as a pipeline. It can accommodate sharp curve construction and long-distance thrusting 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 ■ Suitable for low cover construction ■ Prevents collapse of the excavation profile and allows for excavation within the ground *For more details, please refer to the PDF document or feel free to contact us.

• Special Construction Method

The technology is a construction method that allows for long-distance propulsion using a vacuum excavation method. For diameters of 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 account the surrounding environment. 【Features】 ■ A diverse lineup of cutter heads tailored to soil types (φ250 to 600) ■ Very small launch and arrival shafts ■ Capable of long-distance launches ■ Advanced curved construction possible with an in-pipe measurement system ■ Advanced curved construction possible with an electromagnetic wave measurement system *For more details, please refer to the PDF document or feel free to contact us.

• Special Construction Method

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 replacement can be done 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 replacement can be done from inside the machine, enabling long-distance advancement ■ The action of approximately 25mm of overcut and high-concentration mud water forms a mud film on all excavation surfaces and constructs a highly stable tail void *For more details, please refer to the PDF materials or feel free to contact us.

• Special Construction Method

This technology employs a mud pressure-type 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 a slurry that is pumped up to the standing 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.

• Special Construction Method

This technology is a non-excavation small-diameter pipe jacking method that can construct 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 an excavation and soil removal method, there is no need for large surface facilities like those required for slurry methods, and the equipment associated with the work, such as cranes and generators, can be kept small, 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 document or feel free to contact us.

• Special Construction Method

This technology is a method that can extensively accommodate construction that is impossible with conventional methods, such as bit replacement during excavation in response to changes in soil conditions and direct connection to existing pipes. Bits, steel pipes, and excavation methods suitable for the soil type can be selected. Ground improvement can be performed from within the leading body. Additionally, the advancement of electronic devices has enabled a high-precision 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 shrinking. - No restrictions on the launch base or access shaft in small spaces. - A wide variety of excavation and soil removal methods can be selected. - All-direction excavation is possible. - Long-distance excavation of up to 300 meters is achievable. *For more details, please refer to the PDF document or feel free to contact us.

• Ground foundation construction method

This technology is a small-diameter pipe jacking method that allows for construction on a wide range of ground conditions, from ordinary soil to gravel, cobblestones, and bedrock, thanks to its high torque performance lead conductor. It easily crushes cobblestones and bedrock. A single mud-water process makes 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 single process ■ Wide adaptability to soil types ■ Realizes miniaturization of shafts *For more details, please refer to the PDF document or feel free to contact us.

• Ground foundation construction method

The KB Drain Method is a non-excavation groundwater lowering technique that establishes the technology to lay special collection and drainage pipes without excavating the target ground. Traditionally, the mainstream method was to drive piles for liquefaction countermeasures, but this method increases resistance to liquefaction by lowering the groundwater level and increasing the thickness of the non-liquefied layer. As a result, construction in urban and residential areas, which was difficult with conventional excavation methods, becomes possible. 【Features】 ■ Safe and reliable construction method ■ Construction in narrow spaces ■ Compatible with a wide range of soil types ■ Long-distance construction with a 100m span ■ Economical with compact equipment ■ Fast with fewer processes *For more details, please refer to the PDF materials or feel free to contact us.

• Ground foundation construction method
• Special Construction Method

Our company conducts various "advancement methods," including the Cobra method and pipe return method. In particular, regarding advancement construction, we have made various efforts and continuous pursuits, accumulating a track record of 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.

• Ground foundation construction method