Pile foundation bearing capacity detection and durability evaluation method for existing structure system
A technology with existing structures and bearing capacity, applied in infrastructure engineering, infrastructure testing, construction, etc., can solve problems such as implementation interference, affecting the reliability of test results, and difficult bearing capacity testing and evaluation methods
Active Publication Date: 2021-04-30
SOUTH CHINA UNIV OF TECH
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Problems solved by technology
[0003] However, the evaluation of the bearing capacity and durability of the existing pile foundation system has the following difficulties: (1) the existing structure is in operation, and the safety operation of the existing structure and building should not be affected during the inspection and evaluation process; (2) the pile There are caps and other superstructures on the upper part of the foundation. The existence of these superstructures makes it difficult to implement the bearing capacity detection and evaluation method used for the acceptance of pile foundations just after construction, or the interference is large, which will affect the reliability of the detection results.
[0004] The current detection and evaluation technology of the existing structural pile foundation system is difficult to meet the above requirements
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[0030] In order to facilitate a better understanding of the purpose, structure, features, and effects of the present invention, the present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.
[0031] Such as figure 2 with image 3 As shown, the embodiment of the present invention provides a pile foundation bearing capacity detection and durability evaluation method of an existing structural system, including the following steps:
[0032] S1: Provide a plurality of vibration excitation devices 6 distributedly installed in the system and a plurality of displacement response acquisition sensors 11 installed in multiple positions in the system.
[0033] S2: Multiple vibration excitation devices 6 synchronously excite the structure-pile foundation system to generate vertical vibration, and multiple displacement response acquisition sensors 11 collect multi-point displacement responses in the structural system.
[0034]...
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The invention discloses a pile foundation bearing capacity detection and durability evaluation method for an existing structure system. The method comprises the following steps that a plurality of vibration excitation devices installed on a system in a distributed mode and a plurality of displacement response collection sensors installed at multiple point positions in the system are provided; the plurality of vibration excitation devices synchronously excite a structure-pile foundation system to generate vertical vibration, and the plurality of displacement response collection sensors collect multi-point displacement responses in the structure system; and the collected structural displacement response of each point is used for system parameter inversion calculation, the pile foundation bearing capacity and the structural material modulus are calculated according to the inverted system parameters related to the pile foundation, and the structural durability is evaluated based on the material modulus attenuation law. By means of the method, nondestructive testing of the pile foundation bearing capacity of structural systems such as bridges and buildings and durability evaluation of the structural systems can be achieved under the normal operation condition 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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IPC IPC(8): E02D33/00
CPCE02D33/00
Inventor 房营光谷任国
Owner SOUTH CHINA UNIV OF TECH