Stability Analysis And Evaluation Of Gabion Gabion Ecological Protection Structure

The Gebin gabion ecological protection structure,as a new type of support structure,has been promoted and applied in river ecological governance projects,but the implementation standards are limited to local standards.There is a lack of clear methods for analyzing and evaluating the stability of the embankment Gebin retaining wall and slope.In response to the above shortcomings,this article takes the ecological governance project of the Dongliao River in Jilin Province as an example to conduct research on the safety and stability of ecological protection structures of gabion gabions on the water side of embankments and their evaluation methods.Based on the mechanical characteristics test of individual gabion gabions,numerical simulation stability analysis of protection structures was conducted using Geo Studio finite element software and technical theory.Based on the analysis results of multiple operating conditions and protection structure forms,The Analytic Hierarchy Process was used to evaluate the safety and economy of protective structures.The main research results are as follows:1.According to the results of unconfined pressure test and direct shear test of single gabion,the shear strength index of the protective structure is obtained,which provides a basis for building the finite element model of the protective structure and numerical simulation analysis.2.Based on the finite element software Geo Studio,the finite element models of protective structures with different embankment slope ratios and gabion retaining wall types were constructed respectively,the protective structural stability under different retaining wall heights was analyzed,and the response law of protective structural stability under the combination of multiple factors was clarified.3.Simulated and analyzed the stability of the protective structure under the design water level and sudden water level drop conditions.Based on the analysis results of stress distribution in the x and y directions of the contact surface between the slope and the retaining wall,the anti sliding safety coefficient and anti overturning safety coefficient of the gabion retaining wall were obtained.The main reasons for the overall instability of the protective structure were identified,and a stability analysis method for the slope wall type protective structure was proposed.4.According to the analysis results of slope ratio,retaining wall type and retaining wall height on structural stability under the coupling action of steady/transient seepage field and stress field,the protective structure of pagoda retaining wall is determined as the best form.5.According to the analysis results of protective structural stability,the ecological protective structure of gabion gabion is analyzed and evaluated from the perspective of economy and safety.Based on the evaluation results of the analytic hierarchy process,a design scheme with the minimum investment and structural stability meeting the requirements of the specification is proposed.