Screwdriver construction method
Birth of a multi-driver compatible with hard rock formations! High-speed drilling with a hydraulic casing pipe drilling device!
The "Screw Driver Method" can accommodate a wide range of drilling diameters from φ800 to 3200mm. While performing casing drilling with a fully rotating all-casing drilling machine known for its drilling capabilities, it utilizes a screw-type middle drilling device to intermittently discharge large volumes of soil in an earth drill manner, achieving simultaneous improvements in speed, quietness, and environmental performance. This is a new standard that consolidates the features of conventional methods. 【Features of the Screw Driver Method for Hard Ground】 ■ Screw type ■ The storage capacity of excavated soil is approximately 8 to 25 times that of a hammer grab, significantly reducing the number of discharges ■ The discharge efficiency improves compared to a hammer grab in proportion to depth ■ Reliable shear excavation is possible for general earth, consolidated clay layers, gravel layers, sand and gravel layers, soft rock layers, etc. ■ It can be used not only for casing rotary drilling methods but also as a middle drilling device for pipes such as steel pipes and steel sheet piles. *For more details, please refer to the PDF materials or feel free to contact us.
basic information
【Multi-Driver Method for Hard Rock Features】 ■ Cluster Type ■ Efficient excavation of large boulders, cobbles, and hard rock embedded in interbedded ground ■ The device can be suspended at any excavation depth relative to the applicable casing, minimizing setup changes ■ The middle excavation device takes reaction force close to the excavation target area and advances autonomously through its crushing force, enabling reliable excavation of hard rock layers ■ Capable of producing high-quality piles in challenging sites where conventional casing excavation is difficult, such as hard cobbles, rock layers, and sloped rock layers *For more details, please refer to the PDF document or feel free to contact us.
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Applications/Examples of results
【Applicable Work Types】 ■ Cast-in-place pile work, restraining pile work, steel pipe pile work, column row pile work, replacement excavation work *For more details, please refer to the PDF document or feel free to contact us.
