Bearing capacity detection and durability evaluation method of pile foundation in existing structural system

Abstract

The invention discloses a pile foundation bearing capacity detection and durability evaluation method of an existing structural system, which comprises the following steps: providing multiple vibration excitation devices distributed and installed in the system and multiple displacement responses installed at multiple points in the system Acquisition sensors; a plurality of the excitation devices synchronously excite the structure-pile foundation system to generate vertical vibration, and the multi-point displacement responses in the structural system are collected by the plurality of displacement response acquisition sensors; the collected structural displacement responses of each point It is used in the inversion calculation of system parameters. The pile foundation bearing capacity and structural material modulus are calculated from the inverted system parameters related to the pile foundation, and the structural durability is evaluated based on the material modulus attenuation law. The method of the invention can realize the non-destructive detection of the pile foundation bearing capacity of the structural systems such as bridges and buildings and the durability evaluation of the structural systems under the normal operating conditions of the structural systems.

Description

technical field

[0001] The invention relates to a pile foundation bearing capacity detection and durability evaluation method of an existing structural system. Background technique

[0002] After the existing structural pile foundation has been in operation for a certain period of time, the aging and corrosion of the materials of the pile foundation system itself will affect its bearing capacity, and the change of the rock and soil environment around the pile foundation will also affect the bearing capacity of the pile foundation, so it is necessary to regularly test it and evaluation. In addition, due to the large number of reconstruction and expansion projects, the reconstruction and expansion projects are often close to the existing structures, and their construction and operation have an important impact on the safe operation of the existing structures. Therefore, it is necessary to evaluate the bearing capacity and safety of the pile foundation system of the existing st...

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