Detection method of carrier pile bearing force

Abstract

The invention provides a detection method of carrier pile bearing force. The detection method is characterized in that a heavy hammer is used for hammering a carrier pile, the hammering energy is controlled to enable a pile body to generate vertical displacement, and the vertical bearing capacity of the pile is judged through a measured displacement numerical value and the soil property of the bearing course at the pile end. The detection method includes the particular steps that (1) a pile head of the carrier pile needing to be detected is subject to strengthening protection; (2) the heavy hammer is used above the pile head by a certain height and freely falls to hit the pile head, the hammering energy is controlled to enable the pile body to generate downward vertical displacement, and the displacement numerical value is measured and recorded; (3) hammering operation in the step (2) is repeatedly carried out, and when the total energy of multiple times of hammering reaches a set value, hammering is stopped, and the total displacement numerical value of the pile body is recorded; and (4) the carrier equivalent calculation area Ae value is judged through the total displacement numerical value and the soil property of the bearing course at the pile end, and the vertical bearing capacity of the pile is calculated according to the Ae value. The detection method has the beneficial effects of being accurate in result, efficient, rapid and low in cost.

Description

technical field [0001] The invention relates to the field of civil engineering, in particular to a method for detecting the bearing capacity of piles. Background technique [0002] The foundation is the foundation of a building, and its engineering quality and bearing capacity directly affect the life and safety of the building. Therefore, after the foundation engineering construction is completed, it is very important to detect and judge its bearing capacity. At present, the detection method for the quality of pile foundation is mainly to detect the vertical bearing capacity of pile foundation through static load test, and to test the integrity of pile body with the aid of low strain dynamic test method. Anchor piles and other ways of providing reaction force, because the static load test requires a large load, so no matter whether it is the surcharge method or the construction of uplift-resistant anchor piles first, the detection method requires many preparations and take...

AI Technical Summary

Problems solved by technology

At present, the detection method for the quality of pile foundation is mainly to detect the vertical bearing capacity of pile foundation through static load test, and to test the integrity of pile body with the aid of low strain dynamic test method. Anchor piles and other ways of providing reaction force, because the static load test requires a large load, so no matter whether it is the surcharge method or the construction of uplift-resistant anchor piles first, the detection method requires many preparations and takes a long time. In the case of a single pile, it will take more than ten days or even longer, and the cost of inspection and the fee charged are very high. The inspection fee of a single pile is more than tens of thousands of yuan

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