Bored cast-in-place pile suitable for karst areas with connectivity channels and pile forming method thereof

Abstract

The invention relates to a bored cast-in-place pile suitable for karst areas with connectivity channels and a pile forming method thereof. The bored cast-in-place pile comprises a pile body and a wrapping piece, wherein the pile body at least comprises a concrete pile body and a reinforcing cage, the wrapping piece is a composite geotextile with a closed bottom and an open top, the wrapping piececoats the reinforcing cage before the pile body is formed into the pile, the wrapping piece is arranged around and lightly buckled on the reinforcing cage through an annular iron wire, concrete groutis injected into the reinforcing cage under high pressure, the high-pressure concrete grout pushes part of the wrapping piece to bulge towards the connectivity channels to form a dendritic structure in a branch-like form, and the pile is formed after the grout is solidified and hardened; and the diameter of the wrapping piece is larger than the diameter of the reinforcing cage, and the length of the wrapping piece is larger than the length of the reinforcing cage. The bored cast-in-place pile is provided with the wrapping piece to wrap grout, so that the phenomena of grout leakage, diameter shrinkage and the like in the process of manufacturing the bored cast-in-place pile in the karst areas are avoided, the pile forming quality is effectively guaranteed, the integrity of the pile and karst with the connectivity channels is improved, and the bearing capacity of the pile is greatly improved.

Description

technical field [0001] The invention relates to the field of construction engineering, in particular to a bored cast-in-place pile and a pile forming method suitable for karst areas with connected channels. Background technique [0002] Karst is the geological action of water on carbonate rocks, gypsum, rock salt and other soluble rocks, mainly by chemical dissolution, supplemented by mechanical actions such as flowing water erosion, subsurface erosion and collapse, and the general term for the phenomena produced by these actions. . my country's karst areas are mainly concentrated in the southwest region, the area of ​​karst areas in the southwest region accounts for more than one-third of the entire southwest region, and the geological conditions of the karst areas are extremely complex. When designing and constructing infrastructure in karst areas, the design requirements are high, the construction difficulties are large, the period is long, and construction accidents are...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a kind of bored pile and pile forming method suitable for karst areas with connecting passages for the above-mentioned inapplicable defects of existing bored piles in karst areas, not only It can avoid the phenomenon of grout leakage and diameter shrinkage when making bored piles in karst areas with connected channels, and can effectively ensure the pile quality of piles, and at the same time improve the integrity of piles and karst with connected channels, greatly Increase the bearing capacity of piles

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