A construction method of bored pile casing in highly pressure-bearing fractured water formation

Abstract

The invention relates to the technical field of cast-in-place pile construction, and discloses a construction method for bored cast-in-place pile casings in high pressure-bearing fissure water strata, which includes a foundation pile at a set position, a pressure-bearing fissure water layer in the soil layer, and For the cylindrical casing, the specific construction steps are as follows: (1) Investigate the soil layer at the position of the foundation pile, and know the depth and thickness of the water layer of the pressure-bearing fissure in advance; (2). (3) Drill the first pile hole, the depth of the first pile hole is less than the depth of the water layer of the pressure-bearing fracture; (4), lower the casing along the first pile hole until the casing touches the second (5), apply pressure to the casing, so that the casing penetrates the water layer of the pressure-bearing fracture; (6), drill the second pile hole vertically downward from the bottom of the first pile hole until the second pile hole The sum of the depths of the first pile hole and the second pile hole reaches the design total depth.

Description

technical field [0001] The patent of the present invention relates to the technical field of cast-in-place pile construction, in particular, to a construction method for bored cast-in-place pile casings in highly pressure-bearing fissure water formations. Background technique [0002] The construction technology of bored piles is a concrete technology with low construction cost, simple construction operation, no vibration, noise and soil squeezing effect; at present, the construction technology of bored piles has been widely used in the field of construction engineering, and a large number of practical cases It shows that bored cast-in-situ piles have high safety and strong stability, that is, the concrete grout penetrates deep into the soil layer, which can make the soil layer and the cast-in-place pile body closely combined, so that the foundation is more firm and reliable, and the pouring at the same time The pile can effectively control the settlement of the foundation, ...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a construction method for bored cast-in-situ pile casings in high-pressure fissure-water formations, aiming to solve the problem in the prior art that it is inconvenient to recover the casing after the construction of cast-in-situ piles is completed

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