Method for calculating displacement of flexible cantilever retaining wall in multilayer soil under earthquake action
A flexible cantilever and displacement calculation technology, applied in design optimization/simulation, special data processing applications, geometric CAD, etc., can solve problems such as flexible cantilever retaining wall damage
Active Publication Date: 2020-12-01
EAST CHINA JIAOTONG UNIVERSITY
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[0004] The purpose of the present invention is, in order to solve the existing problem of the damage of the flexible cantilever retaining wall in the multi-layer soil caused by the earthquake, and propose a displacement calculation method for the flexible cantilever retaining wall in the multi-layer soil under the earthquake
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[0075] The specific implementation process of the method for calculating the displacement of a flexible cantilever type retaining wall in multi-layer soil under earthquake action of the present invention is as follows figure 1 shown. Its calculation process is as follows:
[0076] (1) Divide the soil layer and the retaining wall into several layers, and determine the displacement field formula of the flexible cantilever retaining wall-soil system after the seismic wave is vertically incident;
[0077] (2) Determine the free field displacement of the soil under the action of vertically incident seismic waves in the layered soil;
[0078] (3) The displacement control equation of the flexible cantilever retaining wall is deduced by the variational method;
[0079] (4) Deduce the attenuation function of the flexible cantilever retaining wall-soil dynamic interaction;
[0080] (5) The attenuation factor γ is solved iteratively, and then the attenuation function and the displacem...
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The invention discloses a method for calculating the displacement of a flexible cantilever retaining wall in multilayer soil under the action of an earthquake. The method comprises the following steps: (1) determining a displacement field formula of a flexible cantilever retaining wall-soil system after vertical incidence of the earthquake wave; (2) determining free field displacement of a soil body in the layered soil under the action of vertical incident seismic waves; (3) deriving a displacement control equation of the flexible cantilever retaining wall; (4) deducing an attenuation functionof the flexible cantilever retaining wall-soil power interaction; and (5) solving an attenuation factor gamma to obtain an attenuation function and a retaining wall displacement function, and solvinga flexible cantilever retaining wall-soil system displacement field formula. The method for calculating the displacement of the flexible cantilever retaining wall under the earthquake action is popularized from the condition of single-layer soil to the condition of multi-layer soil; the Vlasov foundation model is adopted to accurately solve the displacement function of the flexible cantilever retaining wall in the multilayer soil under the earthquake action, the anti-seismic safety design of engineering personnel on the retaining wall is enhanced, and the method has good application and popularization value.
Description
technical field [0001] The invention relates to a method for calculating the displacement of a flexible cantilever type retaining wall in multi-layered soil under earthquake action, belonging to the technical field of civil engineering. Background technique [0002] With the development of social economy and the improvement of people's living standards, the shortage of ground space land has become increasingly prominent. The development and utilization of underground space has become an important measure to solve the shortage of ground space. Therefore, more and more urban foundation pit projects are being constructed. Flexible cantilever retaining wall is an important supporting structure in geotechnical engineering, which can ensure the stability of the soil behind the wall, and is often used as a supporting structure for foundation pit excavation. Soil in nature is mainly distributed in layers, and seismic waves will be refracted and reflected when passing through the lay...
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IPC IPC(8): G06F30/13G06F30/20
CPCG06F30/13G06F30/20
Inventor 可文海管凌霄虞巍巍彭泽文徐长节
Owner EAST CHINA JIAOTONG UNIVERSITY