Equipment for reinforcing silty-fine sand foundation of passenger transport line and reinforcing method

Abstract

The invention discloses equipment for reinforcing a silty-fine sand foundation of a passenger transport line, and belongs to the technical field of foundation reinforcement. The equipment comprises atubular pile and a pile tip, the pile tip is movably connected with the outer wall of the bottom of the tubular pile through a buckle, holes are uniformly formed in the bottom of the outer wall of thetubular pile, and a rotating device sleeves the tubular pile. The rotating device comprises an inner pipe inserted into an inner cavity of the tubular pile, a connecting block sleeves the top end ofthe outer wall of the inner pipe, an outer pipe sleeves the outer wall of the connecting block, and open holes are evenly formed in the bottoms of the outer pipe and the outer wall of the inner pipe.The inner pipe and the outer pipe are rotated by rotating the rotating device, so that the open holes and the holes are staggered. The connection between the silty-fine sand pile inside the tubular pile and the silty-fine sand of the foundation outside the tubular pile is broken, and the connection between the silty-fine sand pile, the silty-fine sand of the foundation outside the tubular pile andthe silty-fine sand inside the holes is further broken, so that the silty-fine sand pile or the silty-fine sand foundation compacted outside is not pulled in the pipe pulling process, and the compacted reinforced foundation is prevented from being damaged.

Description

technical field [0001] The invention relates to the technical field of foundation reinforcement, in particular to equipment and a reinforcement method for strengthening the fine sand foundation of a passenger dedicated line. Background technique [0002] When reinforcing the silt fine sand foundation of the passenger dedicated line, the pipe pile device is generally used. The pipe pile is inserted into the silt fine sand foundation by vibrating the pipe sinking, and the silt fine sand soil layer in and around the pipe pile is removed by vibration. Vibration compaction, when pulling out the pipe pile, generally use the inner sleeve to close the seamless steel pipe, further compact the fine sand pile in the pipe, and further compact the surrounding fine sand foundation, etc., until the pile top elevation required by the design is reached However, when the tube is pulled out, it will move up with the hole, because the inner sleeve of the closed seamless steel pipe will squeeze ...

AI Technical Summary

Problems solved by technology

[0002] When reinforcing the silt fine sand foundation of the passenger dedicated line, the pipe pile device is generally used. The pipe pile is inserted into the silt fine sand foundation by vibrating the pipe sinking, and the silt fine sand soil layer in and around the pipe pile is removed by vibration. Vibration compaction, when pulling out the pipe pile, generally use the inner sleeve to close the seamless steel pipe, further compact the fine sand pile in the pipe, and further compact the surrounding fine sand foundation, etc., until the pile top elevation required by the design is reached However, when the tube is pulled out, it will move up with the hole, because the inner sleeve of the closed seamless steel pipe will squeeze the fine sand into the hole of the pipe pile and contact the outside world The silt and fine sand in the foundation are in contact, so that the silt and fine sand in the hole will be connected with the silt and fine sand pile in the pipe and the silt and fine sand in the external foundation. The sand pile and the silty sand pile of the external foundation are disconnected, which will pull the silt fine sand pile in the pipe and the silt fine sand pile of the external foundation, and easily cause damage to the compacted foundation or silt fine sand pile, affecting the effect of foundation reinforcement, and During the upward movement of the pipe pile, the hole is always open, which causes the fine sand on the inside and outside of the pipe pile to easily flow into each other, causing damage to the compacted foundation. Therefore, we propose a method of strengthening the fine sand foundation of the passenger dedicated line equipment and reinforcement methods

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