PTC pipe pile and its construction method based on cpdb technology and movable anti-blocking device

Abstract

The invention discloses a PTC pipe pile based on CPDB technology and a movable anti-clogging device and a construction method thereof, comprising a prefabricated reinforced concrete pipe, the center of which is a main drainage channel; the outer wall of the prefabricated reinforced concrete pipe is provided with an axial through pile The groove is embedded with a movable anti-clogging device and has several horizontal holes; the inner wall of the prefabricated reinforced concrete pipe and the inner wall of the horizontal hole are laid with capillary permeable drainage belts, and the movable anti-clogging device is provided with openings and In the interlayer, there are fine wire mesh screens and movable metal partitions in the interlayer voids. While ensuring the bearing capacity and drainage capacity of the PTC pipe pile, the invention solves the problem of easy blockage of the drainage hole by using the movable anti-clogging device, and has no problems such as foundation disturbance and difficulty in operation when the partition is removed. The use of CPDB technology increases the total drainage volume and drainage efficiency of PTC pipe piles, especially through its siphon effect, which improves the vertical drainage efficiency of accumulated water inside the pipe piles when there is no external force such as a pump.

Description

technical field [0001] The invention relates to the technical field of civil engineering, in particular to a PTC pipe pile based on CPDB technology and a movable anti-blocking device and a construction method thereof, which is suitable for reinforcing weak foundations. Background technique [0002] Composite foundations are often used in foundation treatment to strengthen soft foundations, among which pile foundations can transfer loads to deep soil layers and are widely used. Ordinary prefabricated concrete piles have heavy material and poor water permeability. The pile itself is prone to large settlement, and the foundation is consolidated slowly, which is not conducive to the full bearing capacity of the foundation soil. During use, the soil around the pile is easy to squeeze into the drainage hole and cause blockage, resulting in a significant decrease in the drainage capacity of the pile body. At the same time, the internal drainage efficiency of the open-hole drainage ...

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Problems solved by technology

[0007] The purpose of the present invention is to overcome the deficiencies of the prior art, that is, the anti-blocking device of the external sleeve of the drainage pipe pile is not conducive to the construction and the stability of the foundation, and the problem of insufficient vertical drainage efficiency of the traditional drainage technology. CPDB technology and PTC pipe pile with movable anti-clogging device and its construction method

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