Construction method of cast-in-situ bored pile suitable for karst cave geology

Abstract

The invention discloses a construction method of a cast-in-situ bored pile suitable for the karst cave geology. The construction method comprises the following steps that (1), a pile position is measured and positioned; (2), a casing is embedded; (3), a pile machine is in position; (4), rock blocks and yellow mud are backfilled, a hole is bored; (5) first-time hole cleaning is carried out; (6), a steel sleeve and a steel reinforcement cage are machined and fixed; (7), the steel sleeve and the steel reinforcement cage are put into the hole; (8), a guide pipe is arranged, and second-time hole cleaning is carried out; (9), concrete is poured; and (10), shifting is carried out. Compared with a conventional construction method, pile body segregation, foot rotting, pile breaking defects and the like are effectively solved, and pile waste can be prevented; the quality of a pile foundation is obviously improved, and safety of a foundation structure of a house is ensured; and later reinforcing or layer reduction event caused by insufficient bearing capacity of a foundation is avoided.

Description

technical field [0001] The invention belongs to the technical field of building construction, and in particular relates to a construction method of impact hole-forming cast-in-place piles suitable for karst cave geology. Background technique [0002] Karst cave geology is distributed in many areas of my country. Due to the influence of the mechanical properties of rock formations, karst caves are often accompanied by unfavorable geological conditions for engineering construction such as groundwater, underground rivers, and karst ditches. For general karst cave geology, the method of filling karst caves and drilling retaining walls can usually achieve the effect of pile formation, but the quality of pile foundations cannot be guaranteed. Defects such as partial holes of sliding rods, falling rods and casings, difficulties in retaining walls, perforation and slurry leakage will directly lead to pile foundation quality hazards such as broken piles, rotten feet, and pile sinking...

AI Technical Summary

Problems solved by technology

For general karst cave geology, the method of filling karst caves and drilling retaining walls can usually achieve the effect of pile formation, but the quality of pile foundations cannot be guaranteed. Defects such as partial hole of sliding rod, falling rod jamming, difficulty in retaining wall, perforation and slurry leakage will directly lead to pile foundation quality hazards such as broken pile, rotten foot, pile sinking, etc. In severe cases, it will affect the overall house and personal and property safety

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