Dynamic test analysis method for uplift bearing capacity of foundation pile

Abstract

The invention discloses a dynamic test analysis method for uplift bearing capacity of a foundation pile, which comprises the following steps: S1, generating an uplift force on a foundation pile to betested by a method of applying a transient excitation force upwards along an axis of a pile body to a position, close to the top, of the foundation pile to be tested; S2, through sensors symmetricallyinstalled on two sides of the pile body of the foundation pile to be tested, acquiring force signals and speed signals of stress waves which are generated under the combined action of the transient excitation force and rock soil around the pile and propagate along the pile body; and S3, according to the force signals and speed signals of the stree waves acquired in the S2, analyzing and calculating an anti-pulling total frictional resistance provided by the rock soil around the pile for the foundation pile to be tested and calculating an anti-pulling dynamic frictional resistance generated bythe rock soil around the pile, and deducting the anti-pulling dynamic frictional resistance from the anti-pulling total frictional resistance to calculate a numerical value of an anti-pulling staticfrictional resistance, so as to obtain the anti-pulling bearing capacity of the foundation pile. According to the method, dynamic test analysis can be applied to testing of the uplift bearing capacityof the foundation pile, and the problems that an existing testing method is complex in process and low in efficiency are solved.

Description

technical field [0001] The invention belongs to the technical field of data analysis methods, and in particular relates to a dynamic test and analysis method for the uplift bearing capacity of foundation piles. Background technique [0002] Pile foundation is a professional term in building structure, which is a foundation composed of piles and caps connected to the top of the piles. If the pile body is completely buried in the soil and the bottom of the cap is in contact with the soil, it is called a low cap pile foundation; if the upper part of the pile body is exposed to the ground and the bottom of the cap is above the ground, it is called a high cap pile foundation. Construction pile foundations are usually low cap pile foundations. [0003] The pile group foundation refers to the pile foundation composed of more than two rows of piles, and the foundation pile refers to the single pile in the pile group foundation. At present, the dynamic test method of foundation pil...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a dynamic test and analysis method for the uplift bearing capacity of foundation piles, which can apply the dynamic test analysis to the test of the uplift bearing capacity of foundation piles, and solve the problems of cumbersome and inefficient testing procedures in existing testing methods question

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