Pile group foundation bearing capacity detection method, device and system and storage medium

Abstract

The invention relates to a pile group foundation bearing capacity detection method, device and system and a storage medium. The pile group foundation bearing capacity detection method is based on a transient shock excitation device to apply transient impact force to pile group foundations to obtain a dynamic stiffness-frequency correspondence curve, dynamic stiffness corresponding to the preset frequency is obtained, then the dynamic stiffness can be processed, and the allowable bearing capacity of the pile group foundations is obtained, wherein the dynamic stiffness can be obtained in the frequency range from 8 Hz to 12 Hz. By treating tested foundation piles or platforms as rigid pieces, the structure is placed in an elastic state under a certain vibration state under the impact force, the displacement which may cause deformation or damage of other members on the upper parts of bridge pier foundations is avoided, and bearing capacity detection of the pile group foundations is realized. On the basis, the foundation safety assessment scope can be greatly enlarged, and the static bearing capacity of newly-built foundations can be evaluated; and in addition, the bearing capacity of the pile foundations in operation can be detected, and changes in the bearing capacity of the foundations can be tracked and analyzed.

Description

technical field [0001] The present application relates to the technical field of bridge foundation structure detection, in particular to a method, device, system and storage medium for detecting the bearing capacity of pile group foundations. Background technique [0002] In the acceptance process after the completion of bridge pile foundation construction, it is usually necessary to test the integrity or bearing capacity of foundation piles before the completed pile foundation can be put into use. At present, the static load test method is mostly used in this field to evaluate the bearing capacity of pile foundations, and the static load test is mainly used to evaluate the bearing capacity of single piles, accounting for about 1%; the static load test evaluation of pile group foundation bearing capacity Due to the large loading tonnage (thousands of tons) and difficult operation, static load tests are rarely carried out in practical applications, which has buried certain hi...

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Problems solved by technology

At present, the static load test method is mostly used in this field to evaluate the bearing capacity of pile foundations, and the static load test is mainly used to evaluate the bearing capacity of single piles, accounting for about 1%; the static load test evaluation of pile group foundation bearing capacity Due to the large loading tonnage (thousands of tons) and difficult operation, static load tests are rarely carried out in practical applications, which has buried certain hidden dangers for the actual bearing capacity of pile group foundations

Some pier foundations in operation are affected by erosion, saline-alkali environment, and changes in line traffic loads, which will cause changes in the actual bearing capacity of the foundation. For the pile group foundation structure in operation, a large number of static load tests are used to It is impossible to evaluate the bearing capacity of the foundation, and it is more difficult to evaluate the change of the bearing capacity of the foundation

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