Pile testing method for cast-in-situ bored pile

Abstract

The embodiment of the invention discloses a pile testing method for a cast-in-situ bored pile. The pile testing method comprises the following steps that a pile hole is drilled, the cast-in-situ bored pile is poured in the pile hole, a designed elevation position is arranged in the pile hole, and the pile hole comprises a non-experimental section on the upper side of the designed elevation position and an experimental section on the lower side of the designed elevation position; the soil on the peripheral side of the non-experimental section is soften to form a softening area; a sleeve is inserted into the softening area; the sleeve and the cast-in-situ bored pile are coaxially arranged, and a gap is formed between the sleeve and the cast-in-situ bored pile; the filler in the gap is replaced with a liquid medium; and pile testing is conducted. According to the pile testing method, the soil on the peripheral side of the non-experimental section is softened to form the softening area, then the sleeve is inserted into the softening area, and the filler between the sleeve and the cast-in-situ bored pile is replaced with the liquid medium, so that the friction force between the cast-in-situ bored pile and the non-experimental section is greatly reduced or even eliminated, and during pile testing, interference of a non-experimental section is eliminated, and the accuracy of a pile testing result is improved.

Description

technical field [0001] The present application relates to the field of cast-in-situ piles, in particular to a pile test method for bored cast-in-situ piles. Background technique [0002] The pile foundation is a commonly used foundation form in the structure. There are various forms of the pile foundation, among which the bored pile is one of the forms. Whether the bearing capacity meets the design requirements. [0003] In the prior art, the static load test of bored piles is generally carried out on the ground for deep and large foundation pits. The bearing capacity of the pile foundation is composed of two parts: the bearing capacity of the pile tip and the frictional resistance of the pile side. Since the static load test is carried out on the ground, the test results include the pile side friction resistance of the excavation section of the deep foundation pit. The friction resistance of this section will interfere with the test pile and affect the accuracy of the test...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, the static load test of bored piles is generally carried out on the ground for deep and large foundation pits. The bearing capacity of the pile foundation is composed of two parts: the bearing capacity of the pile tip and the frictional resistance of the pile side. Due to the static load test on the ground, the test results include the pile side friction resistance of the excavation section of the deep foundation pit. The friction resistance of this section will interfere with the test pile and affect the accuracy of the test pile result.

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