A Construction Method of Bored Pile in Complicated Inclined Rock and Boulder Geology

Abstract

The present invention relates to a construction method for geological bored piles in complex inclined rocks and boulders, comprising steps: S1, using a coring machine to drill and drill holes on the foundation and boulders on the side of the pile; S2, making explosive tubes; S3, Every other drill hole is buried in drill hole 1; S4, install the lifting rope on the top of the limit rod; S5, put the steel sheath on the outside of the limit rod to the highest point of the rock surface; S6, pre-crack with static breaking agent and loose rocks; S7, lifting the lifting rope to recover the limit rod and PVC pipe for secondary use; S8, setting up geotextile bags on the part of the steel cage corresponding to the hole of the boulder; Expansion rubber; S10, sink the assembled steel cage to the designated position, and pour concrete. The beneficial effects of the present invention are: the present invention can prevent the deflection of the casing by setting the limit rod on the partial rock and boulder, and when the ejection deflection of the drill bit affects the casing, it can be restricted by the limit rod, thereby improving the verticality of the pile hole .

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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