Early-warning method for stability of retaining wall structure

Abstract

The invention relates to an early-warning method for stability of a retaining wall structure. The method comprises following steps: firstly, a retaining wall-rock and soil coupling system is subjected to mechanical analysis, and a simplified mechanical model of the retaining wall-rock and soil coupling system is built; a finite element model of the retaining wall-rock and soil coupling system is built on the basis of the simplified mechanical model, and a baseline finite element model of the retaining wall-rock and soil coupling system is obtained with a finite element model correcting technology; a virtual impulse response function between dynamic responses of the baseline finite element model of the retaining wall-rock and soil coupling system is calculated and is then subjected to wavelet packet frequency band energy spectrum analysis, and an early-warning index is proposed; internal relations among the early-warning index, soil pressure and a retaining wall stability coefficient are analyzed on the basis of the simplified mechanical model of the retaining wall-rock and soil coupling system, the finite element model correcting technology and the early-warning index, and the stable state of the retaining wall is determined through the early-warning index. The method is simple, convenient, quick, efficient, modern, intelligent and capable of being widely applied to early warning about stability of various rock and soil retaining structures, and has broad application prospect.

Description

technical field [0001] The invention belongs to the technical field of retaining wall health monitoring and safety early warning, and relates to a stability early warning method for retaining wall structures. Background technique [0002] At present, most of the damage early warning methods for civil engineering structures are aimed at structural components such as beams, slabs, and columns, building structures, or bridge structures, while the safety early warning technology for geotechnical retaining structures is still in its infancy. However, under the joint action of environmental erosion, material aging, load variation, fatigue effect, stress mutation and other factors, damage will continue to appear and accumulate inside the retaining wall structure, resulting in a decrease in structural resistance. When its resistance is low to a certain extent, the retaining wall structure will fail or be destroyed. Especially for those retaining wall structures with high importance...

AI Technical Summary

Problems solved by technology

At present, the research on the stability of the retaining wall mainly studies the stability analysis method of the retaining wall under static or dynamic loads, or studies the influence of various factors on the stability of the retaining wall, and does not affect the stability of the retaining wall. Early warning research is carried out, so the early warning research on the stability of the retaining wall is still blank

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