Hollowed cast-in-place pile hole forming structure of rigid rock stratum water grinding drill and construction method

Abstract

The invention discloses a hollowed cast-in-place pile hole forming structure of a rigid rock stratum water grinding drill and a construction method. The structure comprises a rock core and a walling crib; the walling crib is positioned at the outer periphery of the rock core; a coating layer is coated on the inner wall of the walling crib; hollowed discs are distributed in the walling crib according to the depth of a pile; a lap of pile hole ring is arranged on a single disc; the pile hole ring comprises multiple core drilling holes; two adjacent core drilling holes are intersected, and the outer sides are tangential to the inner wall of the walling crib; the rock core in the core drilling holes is cut through the water grinding drill to form a free face; and then, a central rock body is hollowed. The method comprises such steps as construction preparation, positioned lofting, pile hole locking, pile hole hollowing, rock slag discharge, pile hole control, pile hole correction and pile hole acceptance. The hollowed cast-in-place pile hole forming construction process applying the water grinding drill efficiently finishes the foundation construction of piles with various specifications, effectively controls the influence on surrounding dense complicated environments and commercial downtowns by the construction, guarantees safe and smooth engineering construction, and achieves excellent economic benefit and social benefit.

Description

technical field [0001] The invention relates to the field of building construction, in particular to a pore-forming structure and construction method of a cast-in-place pile drilled and cored by water milling in hard rock formations. Background technique [0002] Cast-in-situ piles are a common form of foundation in foundation engineering. Due to different hydrogeological conditions, there are various forms of hole-forming methods for cast-in-place piles. Mudstone, argillaceous sandstone, and sandstone are common in the basic geological structure of the Sichuan-Chongqing area. The blasting method is a more efficient hole-forming method for crossing hard rock formations or entering rocks, but its shortcomings are also very obvious, such as blasting. High technical requirements for control and blasting, great impact on the surrounding environment due to vibration, noise and dust, loose hole walls after hole formation, and inaccurate hole size require secondary manual chiseling...

AI Technical Summary

Problems solved by technology

Mudstone, argillaceous sandstone, and sandstone are common in the basic geological structure of the Sichuan-Chongqing area. The blasting method is a more efficient hole-forming method for crossing hard rock formations or entering rocks, but its shortcomings are also very obvious, such as blasting. High technical requirements for control and blasting, great impact on the surrounding environment due to vibration, noise, dust, etc., the hole wall is loose after the hole is formed, and the hole size is inaccurate, requiring secondary manual repairs, etc.

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