Construction method of complex inclined rock and boulder geological bored pile

Abstract

The invention relates to a construction method of a complex inclined rock and boulder geological bored pile. The construction method comprises the following steps of: S1, drilling first drill holes ina foundation and boulders on the pile side by using a coring machine; S2, manufacturing an explosive tube; S3, burying wall protecting tubes in the first drill holes every other first drill hole; S4,mounting a lifting rope at the top of a limiting rod; S5, sleeving the outer side of the limiting rod with a steel casing to the highest point of the rock surface; S6, pre-cracking and loosening rocks by using a static crushing agent; S7, lifting the lifting rope to recover the limiting rod and a PVC tube for secondary utilization; S8, arranging a geotextile bag at the position, corresponding toa boulder hole, of a reinforcement cage; S9, arranging water-swellable rubber between a first iron sheet and a second iron sheet; and S10, sinking the assembled reinforcement cage to a designated position, and pouring concrete. The construction method has the advantages that the limiting rod is arranged on the inclined rock and boulders, so that the casing can be prevented from deflecting; and when a drill bit is ejected and deflects to affect the casing, the drill bit can be limited by the limiting rod, so that the perpendicularity of a pile hole is improved.

Description

technical field [0001] The invention relates to the construction of bored cast-in-place piles, in particular to a construction method of bored cast-in-place piles in complicated inclined rock and boulder geological conditions. Background technique [0002] When bored piles are constructed in areas containing granite in the stratum, boulders (spherical irregular weathering of granite) are often encountered, which makes it difficult to form holes for bored piles. Due to the high strength of the granite boulder, the bored pile cannot be constructed to the design height; when the drill bit of the bored pile encounters inclined rock, due to the deflection of the rock surface, the impact drill bit is easily deflected by ejection, resulting in Deviation, the existing technical scheme for rectifying the deflection is: throwing and filling high-strength flakes, and then using a percussion drill to impact and rectify the deflection; after measuring the inclination of the drilled hole ...

AI Technical Summary

Problems solved by technology

[0002] When constructing bored piles in areas containing granite in the stratum, boulders (spherical irregular weathering of granite) are often encountered, which makes it difficult to form holes for bored piles

Due to the high strength of the granite boulder, the bored pile cannot be constructed to the design height; when the drill bit of the bored pile encounters inclined rock, due to the deflection of the rock surface, the impact drill bit is easily deflected by ejection, resulting in Deviation, the existing technical scheme for rectifying the deflection is: throwing and filling high-strength flakes, and then using a percussion drill to impact and rectify the deflection; after measuring the inclination of the drilled hole cannot meet the requirements, then throwing and filling high-strength flakes, and repeatedly impacting with a percussion drill Correction

In addition, boulder holes will be generated when the boulders on the side of the pile are removed, and concrete will be filled into the holes when the bored piles are poured, resulting in excessive filling, which wastes concrete and is unfavorable to the force of the pile foundation

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