Air hammer type with directional control function for "shock drilling and propulsion method." The target soil types are infinite for gravel! Infinite for rock!
The hard rock construction method is a technique that uses a horizontal boring single-pipe propulsion system, incorporating large and small down-the-hole hammers into the leading body, allowing for the crushing of hard soil types such as soft rock, hard rock, gravel, and cobblestones while being propelled with low thrust. After the completion of the steel pipe propulsion, it can accommodate various pipelines (such as water supply and drainage, electricity, gas, and other lifeline pipelines). Additionally, as a special method, it is possible to construct pipelines with a nominal diameter of 800mm or more using a reaming method that utilizes the reach.
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basic information
- By excavating and advancing only through the crushing of hard ground (bedrock, cobbles, and boulders mixed with gravel) using impact force, it is possible to achieve long-distance and high-precision construction without being affected by changes in rock quality or the position of boulders and cobbles. - In rock layers of medium hard rock or harder, construction with a maximum advancement length of 150 meters is possible by replacing the down-the-hole hammer bit. - The minimum dimensions of the launch shaft are Φ2500mm, allowing for access to existing manholes. Additionally, inclined and vertical construction from the ground surface is also possible. - The applicable pipe diameter ranges from steel pipe nominal diameter Φ400 to 800mm, and it can also be replaced with Hume pipes.
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Applications/Examples of results
Lifeline pipelines such as water supply and drainage, electricity, and gas.
Company information
Our company was founded in 1958 and specializes in underground special civil engineering works such as underground continuous walls, underground obstacle removal, ground improvement, and pipeline construction. In recent years, we have expanded our business operations to include slope work and construction. There is a growing social demand for securing the natural environment, seismic reinforcement, liquefaction prevention, restoration of structures, and urban redevelopment, which have become pressing issues in recent years. In response to these social needs, we have developed seismic reinforcement and liquefaction countermeasure methods such as the "Ultra Multi-Point DP Method" and the "High Grip Grout Method." For structural restoration, we utilize our in-house developed restoration method called "Suiheikun," and for urban redevelopment, we are conducting research and development of new methods such as the "Hiro Work Kmigty Method," "Bauer Method," and "Super Top Method," aimed at underground obstacle removal. Additionally, as part of our eco-friendly initiatives, we are researching and developing methods that use bubble drilling fluid to reduce industrial waste, striving to contribute to society through high-quality construction and services. We aim to continue responding to the needs of the times by deploying a variety of specialized techniques and uniquely developed methods.
