Removal device and method after locking of precast pile in pile sinking process

Abstract

The invention provides a detrapping device and method after a precast pile is locked in the pile sinking process. The detrapping device comprises the precast pile, a sponge body, a wire and a steel plate. A plurality of annular grooves are formed in a pile body of the precast pile, and sponge bodies are bound to the outer sides of the annular grooves; when the precast pile is locked in the piling process, water in soil around the pile is migrated to the sponge body through the electroosmosis effect, so that the sponge body absorbs water and expands; and when the pile is driven again, water in the sponge body is squeezed out due to the squeezing effect of the soil body, the pile body is lubricated, the side friction resistance of the pile body is reduced, and the locked state of the pile body is relieved. The phenomenon that a pile body is locked due to the fact that piling is stopped for a period of time in engineering, the depth of the pile body entering soil is directly lower than a design value, the bearing capacity of a pile foundation is reduced, and hidden dangers are brought to the long-term stability of an upper structure, the phenomenon that the pile body is locked can be effectively avoided, and it is guaranteed that pile foundation construction is conducted rapidly and effectively.

Description

technical field [0001] The invention belongs to the technical field of building pile foundation construction, and particularly relates to a trapping device and a trapping method after a prefabricated pile is locked in a pile driving process. Background technique [0002] The prefabricated reinforced concrete piles are driven into the ground by a pile driver, which saves materials and has high strength, and is suitable for buildings with high requirements. The disadvantage is that the construction is difficult and the construction time is long due to the limitation of the number of machines; For strata such as sand-filled soft clay strata, it is often encountered that after a period of pile driving clearance, the pile foundation is locked and cannot continue piling, which may cause the problem of waste piles or insufficient bearing capacity of the pile foundation. At present, the main disposal method is to increase the pile driving. Hammer the load with a machine, or redo the...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the deficiencies and defects of the prior art, and provide a device and method for getting out of trouble after the prefabricated pile is locked in the pile sinking process, and store the moisture in the soil in the sponge body through electroosmosis, and then Under the action of the hammering force, the sponge body and the soil squeeze out water to lubricate the surroundings of the pile, which effectively solves the problem of increased cohesion between the pile and the soil due to the dissipation of pore pressure during the piling process, which causes the pile to appear after a period of stagnation. The problem of not being able to log in again

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