Pile sinking device for assisting prefabricated hollow pile in frozen soil area

Abstract

The invention discloses a pile sinking device for assisting a precast hollow pile in a permafrost region, which comprises a pile body, an auxiliary cylinder is movably mounted in the pile body, an electric heating block capable of penetrating through the bottom of the pile body is fixedly connected to the bottom of the auxiliary cylinder through a connecting rod, the pile sinking device further comprises a medium pipe extending out of the auxiliary cylinder from the inside of the auxiliary cylinder, and the two ends of the medium pipe extend out of the pile body. And a fixing device is also arranged on the auxiliary cylinder. The auxiliary cylinder and the electric heating block are mounted in the pile body, so that the electric heating block extends to the bottom of the pile body, and during pile sinking operation, the electric heating block is electrified and generates heat to melt frozen soil at the bottom of the pile body and reduce the hardness of the frozen soil, so that the pile sinking operation is easier to perform, and the pile sinking efficiency is improved; and meanwhile, a cooling medium is introduced into the medium pipe, and in the descending process of the pile body, the cooling medium can freeze slurry on the side face of the pile body, so that the fixing effect on the pile body is improved, and the problem that the pile body shakes due to frozen soil melting is solved.

Description

technical field [0001] The invention relates to a pile sinking device, in particular to a pile sinking device for assisting prefabricated hollow piles in permafrost regions. Background technique [0002] Permafrost foundation is an extremely unstable foundation, which is prone to frost heaving and thawing with the change of ambient temperature, which will lead to the destruction of engineering structures due to uneven deformation of the foundation. Prefabricated hollow piles are commonly used in projects in permafrost regions, and the pile ends are penetrated into permafrost regions with high bearing capacity and stable state to provide higher bearing capacity for the upper structure. [0003] A Chinese patent with publication number CN112982407A discloses an auxiliary pile sinking device for prefabricated hollow piles, which comprises a booster pump, a water pipe, a nozzle, and a fixing frame. The fixing frame is installed on the inner wall of the prefabricated hollow pile...

AI Technical Summary

Problems solved by technology

However, due to the high hardness of the geology in the permafrost region, the pile driving operation of prefabricated hollow piles is quite difficult, which makes it difficult for the existing auxiliary pile driving device to quickly sink the pile body into the frozen soil

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