Research on Dynamic Performance Optimization and Stability Evaluation of Seismic Pile-Cable Composite Structure for Bedding Rock Slope in Meizoseismal Areas
Zhao Fei
Shi Zhenming
Li Bo
Yu Songbo
Chen Jianfeng
Abstract：The seismic stability of rock slopes is a critical scientific issue in engineering construction in meizoseismal areas.Given the vulnerability of conventional retaining structures to failure under strong earthquakes,the development and optimization of seismic-resistant support structures have become a key research focus in engineering geology.This study investigates a soft-hard interbedded bedding rock slope along an expressway in Ludian County,Yunnan Province.Based on a self-developed seismic pile-cable(SPC)composite structure,simplified numerical models are established using the finite difference method FLAC3D to systematically optimize and evaluate the dynamic performance of the SPC composite structure.Key support parameters are selected for optimization,including those of the energy-dissipating anchor cable system and the composite anti-slide pile system.A parametric sensitivity analysis and stepwise optimization approach are employed,followed by a comprehensive assessment of the optimized seismic pile-cable(OSPC)composite structure from the perspectives of slope stability,seismic resistance,and economic efficiency.The results demonstrate that the OSPC composite structure exhibits superior seismic performance and cost-effectiveness compared to conventional pile-cable(CPC)and SPC composite structures.Specifically,it reduces the maximum permanent displacement and maximum shear strain increment of the slope by 53%and 24%,respectively,while decreasing the pile-top displacement of front and rear anti-slide piles by 85%and 99%,and additionally,the material consumption for concrete and anchor cables is reduced by 34%and 3%.The findings provide theoretical support for the seismic design of bedding rock slopes in meizoseismal areas,offering significant engineering application value.
Keywords：strong earthquakebedding rock slopeseismic pile-cable composite structureperformance optimizationstability evaluationengineering geology
Publication Date：2025-10-30
Online Publishing Date：2025-11-11(First online date of this platform, not the publication date of the document)
Pages：12( 3943-3954 )