Deformation calculation method and application technology of foundation soil under large foundation

Abstract

The invention discloses a deformation calculation method and application technology of foundation soil under a large foundation. The method includes the following steps that S1, a plane grid system isestablished, wherein specifically, the foundation under a test area is divided into a plurality of identical sub-areas on the indexed plane of a base, when the number of the sub-areas is large enough, the effective additional stress acting on each sub-area can be equivalent to a concentrated force, and the action point of the concentrated force is located in the center of the sub-area; S2, a foundation soil deformation calculation model is built; S3, the compression modulus Es of the foundation soil is calculated, and the vertical deformation value is solved. According to the deformation calculation method and application technology of the foundation soil under the large foundation, the deformation calculation model of the layered foundation soil under the large foundation is applied to deformation calculation and prediction of the foundation under the large foundation such as a raft foundation and a construction board expansion foundation, the problem about nonlinear loading of the foundation plane is solved, the defects of traditional single-point calculation are overcome by deformation space distribution of layered planes, and calculation results are more visual.

Description

technical field [0001] The invention relates to the technical field of geotechnical engineering, and relates to a method for calculating deformation of foundation soil under a large foundation. The technology is applied to the calculation and prediction of foundation deformation under a large foundation. Background technique [0002] Several commonly used methods for calculating foundation deformation are: [0003] (1) Stratified sum method [0004] The layered sum method is one of the most commonly used settlement calculation methods in engineering. This method divides the foundation within the compression layer into several layers, uses the elastic theory to calculate the additional stress, and uses certain experimental methods to determine the soil stress of each layer. Strain relationship, the vertical compression is calculated layer by layer, and then summed to obtain the total settlement. [0005] This method assumes that the foundation soil cannot be deformed in the...

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Problems solved by technology

[0017] According to the technical problems raised above, a calculation method and application technology for the deformation of foundation soil under large foundations are provided, which are used to solve the existing methods for calculating foundation deformation. For large, complex and important foundations, such as raft foundations, Structural slab expansion foundation, etc., mistakenly believe that the point of maximum load action is the point of maximum settlement, and the point of maximum load action as the maximum deformation control point has the disadvantage of potential safety hazards

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