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Slope shear strength parameter inversion analysis method based on equivalent soil pressure action

A shear strength and parameter inversion technology, applied in electrical digital data processing, special data processing applications, instruments, etc., can solve the problems of inability to obtain rock mass inversion parameters more accurately, and low overburden parameters.

Active Publication Date: 2022-02-01
POWERCHINA XIBEI ENG
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  • Abstract
  • Description
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Problems solved by technology

[0005] The present invention provides an inversion analysis method for slope shear strength parameters based on equivalent earth pressure, which solves the problem that when inversion of rock mass parameters of a slope with an overburden layer occurs, the overburden layer parameters are relatively low and the sliding surface is always within the overburden layer. , the inversion parameters of the rock mass cannot be obtained more accurately

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  • Slope shear strength parameter inversion analysis method based on equivalent soil pressure action
  • Slope shear strength parameter inversion analysis method based on equivalent soil pressure action
  • Slope shear strength parameter inversion analysis method based on equivalent soil pressure action

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Embodiment 1

[0050] refer to Figure 1-4 , is a structural schematic diagram of Embodiment 1 of the present invention, a method for inversion analysis of slope shear strength parameters based on equivalent earth pressure, comprising the following steps:

[0051] The first step is to collect field data and obtain preliminary rock mass material parameters, field rock mass test data and monitoring data. Rock mass material parameters include rock mass density, Poisson's ratio, elastic modulus, tensile strength, and compressive strength. Rock mass test data include sliding surface, anti-slip section, structural surface, type III rock mass, weak zone rock mass and overburden data, and monitoring data include deformation and stress at the slope position;

[0052] The second step: establish a numerical calculation model, based on the development of cracks in the field and the difference in rock materials and the data obtained in the first step, establish a numerical calculation model;

[0053] Th...

Embodiment 2

[0058] refer to Figure 1-4 , is a structural schematic diagram of Embodiment 2 of the present invention, a method for inversion analysis of slope shear strength parameters based on equivalent earth pressure, comprising the following steps:

[0059] The first step is to collect field data and obtain preliminary rock mass material parameters, field rock mass test data and monitoring data. Rock mass material parameters include rock mass density, Poisson's ratio, elastic modulus, tensile strength, and compressive strength. Rock mass test data include sliding surface, anti-slip section, structural surface, type III rock mass, weak zone rock mass and overburden data, and monitoring data include deformation and stress at the slope position;

[0060]The second step: establish a numerical calculation model, based on the development of cracks in the field and the differences in rock materials, as well as the collected field data, the data obtained, establish a numerical calculation mod...

Embodiment 3

[0093] Such as figure 1 As shown, the practical application of a slope shear strength parameter inversion analysis method based on the effect of equivalent earth pressure: based on the rock mass test data and monitoring data at the engineering site, provide preliminary rock mass material parameters, such as the initial parameters in Table 1 ;

[0094] Based on the development of cracks on site and the differences in rock materials, a numerical calculation model is established considering the main structural planes and strata boundaries, as shown in figure 2 shown;

[0095] Calculate the initial in-situ stress field under the action of self-weight, and then use the strength reduction method to carry out the inversion analysis of the rock mass shear strength parameters. Even if the shear strength parameters of the overburden layer are raised to a higher level, the slope failure position is still inside the overburden layer , the safety factor is less than the critical value 1...

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Abstract

The invention relates to the field of slope engineering stability evaluation, in particular to a slope shear strength parameter inversion analysis method based on equivalent soil pressure action, the method comprises the following steps: acquiring rock mass material parameters, rock mass test data and monitoring data; establishing a numerical calculation model according to slope field data; performing rock mass shear strength parameter inversion analysis in a soil initial stress field by using the numerical calculation model; comparing the slope stress field with the initial ground stress field under the action of the equivalent soil pressure, and carrying out inversion analysis on the shear strength parameters c and phi of the rock mass again; correcting the initial parameters through the inversion parameters, and obtaining the shear strength parameter cohesive force c and the internal friction angle phi of the rock mass. According to the method, in parameter inversion analysis of the side slope with the covering layer, the slope pressing effect of the covering layer is considered, the problem that the rock mass inversion parameters cannot be obtained due to the fact that the sliding surface is always in the covering layer due to the fact that the parameters of the covering layer are relatively low is solved, and then the shear strength parameters of the rock mass can be obtained more accurately and reasonably.

Description

technical field [0001] The invention relates to the field of slope engineering stability evaluation, in particular to an inversion analysis method for slope shear strength parameters based on equivalent earth pressure. Background technique [0002] In the analysis of rock slope problems, the determination of rock mass material parameters is the key to the numerical value of geotechnical engineering, which is directly related to the effect of numerical simulation. In fact, due to the complexity of the rock mass structure and the existence of uncertain factors such as being greatly influenced by the surrounding environment, the determination of the parameters has always been a difficult point. Due to the complex physical and mechanical properties of rock and soil materials, the more various parameters required in the analysis process, the higher the requirements for parameter accuracy. In the traditional research work, all through the field rock mechanics test Or indoor sampl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20G16C10/00G16C60/00G06F119/14
CPCG06F30/20G16C10/00G16C60/00G06F2119/14
Inventor 陆希黄鹏狄圣杰张莹刘静
Owner POWERCHINA XIBEI ENG
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