All-soil compatible small-diameter mud-water / earth pressure thrusting method "Cobra Method"
A leading conductor with a wide range of soil adaptability and high torque performance! Construction in a small shaft for a wide variety of ground conditions!
The "Cobra Method" is a revolutionary small-diameter thrusting method that can be used to construct from ordinary soil to boulders and bedrock using a small shaft. The unique joint pipes within the Cobra thrusting pipe prevent rolling and respond to unexpected ground conditions that could pull the tunneling machine out, allowing for high-precision construction. Furthermore, even in challenging ground conditions, it is possible to achieve thrusting distances of approximately 200 meters. Additionally, all components, including a compact mud-water treatment system that can be mounted on vehicles and a disassemblable main body, are designed to be small and space-saving, allowing for retrieval from manholes. 【Features】 ■ High torque performance with a wide range of soil adaptability ■ Realization of smaller shafts ■ Improved convenience for retrieval with a four-part tunneling machine ■ Capable of thrusting approximately 200 meters in harsh ground conditions (with applicable conditions) ■ Ability to select excavation methods according to soil type *For more details, please feel free to contact us.
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basic information
【Other Features】 ■ Capable of construction on a wide range of ground conditions from ordinary soil to gravel, cobblestones, and bedrock. ■ Can start from a 2.5m diameter circular shaft, resolving space issues. ■ Designed to allow the injection of additives from the cutter to the face, enabling a switch to a mud pressure method. ■ Two-component lubricants can be injected according to soil type, ensuring precision and stability of the thrust pipe. *For more details, please feel free to contact us.
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Applications/Examples of results
【Purpose】 ■ Construction on a wide range of ground conditions from ordinary soil to gravel, cobblestones, and bedrock. *For more details, please feel free to contact us.
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Company information
Yasuda Engineering Co., Ltd. has been a specialized company in public sewer construction, contributing to the environmental development of the local community since its establishment in 1975. We have pursued sound management and advanced technical capabilities, continuing to make steady progress. In 2001, we acquired the international standard "ISO9001" and expanded into the field of general civil engineering. We aim to be a corporate group capable of continuous innovation as a comprehensive construction company, including building construction. "Honing our technology with rich sensibility, we evaluate from a fair perspective to enhance the vitality of the company in order to meet our customers' needs." This is the management policy of Yasuda Engineering Co., Ltd. We, Yasuda Engineering Co., Ltd., are committed to uniting all employees to refine our technical skills and create a new future.