Dynamic feedback analysis and optimization design method for fissure rock slope based on monitoring information

Abstract

The invention relates to a dynamic feedback analysis and optimization design method for a fissure rock slope based on monitoring information. According to the dynamic feedback analysis and optimization design method for the fissure rock slope based on the monitoring information, quantitative analysis, optimization design and risk prediction of the engineering stability of the fissure rock slope are achieved, and engineering safety and economical efficiency are improved. According to the technical scheme, the dynamic feedback analysis and optimization design method for the fissure rock slope based on the monitoring information is characterized by comprising the steps that the slope is divided into a plurality of excavation construction steps conducted along the slope from top to bottom, andeach construction step comprises slope excavation construction and supporting structure construction; deformation of each construction step during slope excavation is monitored in real time; and aiming at the n construction step, wherein n is greater than or equal to 1, a fissure rock numerical analysis model is established based on the survey result of the site rock mass structure characteristics. The dynamic feedback analysis and optimization design method is suitable for fissure rock slope treatment in the fields of water conservancy and hydropower, traffic and the like.

Description

technical field [0001] The invention relates to a method for dynamic feedback analysis and optimal design of a fractured rock slope based on monitoring information. It is suitable for the treatment of fractured rock slopes in the fields of water conservancy, hydropower, transportation, etc. Background technique [0002] The structural characteristics of rock mass generally play a controlling role in the deformation mechanism and stability of rock slopes, but the structural characteristics of rock mass are complex and uncertain, and it is difficult to quantify them before the start of the project. The design method of fractured rock slope support is very blind, and cannot consider the influence of specific rock mass structure characteristics on slope stability, which brings certain safety risks and engineering economic problems. [0003] The dynamic feedback analysis method based on numerical means is currently one of the main methods for rock slope optimization design and r...

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Problems solved by technology

[0002] The structural characteristics of rock mass generally play a controlling role in the deformation mechanism and stability of rock slopes, but the structural characteristics of rock mass are complex and uncertain, and it is difficult to quantify them before the start of the project. The design method of fractured rock slope support is very blind, and cannot consider the impact of specific rock mass structure characteristics on slope stability, which brings certain safety risks and engineering economic problems

[0003] The dynamic feedback analysis method based on numerical means is currently one of the main methods for rock slope optimization design and risk management and control. On-site monitoring information is used to back-analyze the rock mass mechanical parameters, so as to guide the specific slope excavation and support scheme. However, due to the limitations of the current numerical analysis methods, most numerical analysis methods simplify the rock mass into a homogeneous body, but in fact the rock mass is a complex structure composed of rock blocks and structural planes, ignoring the rock mass. The structural characteristics of the body often lead to a large difference between the numerical analysis results and the actual engineering, which makes the feedback analysis still in the embarrassing situation of qualitative analysis.

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