基于软岩蠕变模型的西南山区路堑边坡锚索预应力损失及稳定性评估方法研究  

Research on the evaluation method for prestress loss and stability assessment of anchor cable of cutting slope in southwest mountainous area based on soft rock creep model

作　　者：龙云 王丽军 孙崇华 李如刚 严松 秦雨樵 LONG Yun;WANG Lijun;SUN Chonghua;LI Rugang;YAN Song;QIN Yuqiao(Yunnan Transportation Investment and Construction Group Limited Yunling Construction Co.,Ltd.,Kunming 650000,China;Yunnan Provincial Transportation Investment and Construction Group Co.,Ltd.,Kunming 650000,China;Beijing Special Engineering and Design Institute,Beijing 100006,China;State Key Laboratory of Geomechanics and Geotechnical Engineering Safety(Institute of Rock and Soil Mechanics,Chinese Academy of Sciences),Wuhan 430071,China)

机构地区：[1]云南交投集团云岭建设有限公司,昆明650000 [2]云南省交通投资建设集团有限公司,昆明650000 [3]北京特种工程设计研究院,北京100006 [4]岩土力学与工程安全全国重点实验室(中国科学院武汉岩土力学研究所),武汉430071

出　　处：《中国科技论文》2025年第3期197-206,共10页China Sciencepaper

基　　金：云南省交通投资建设集团有限公司科技创新项目(YCIC-YF-2023-10)。

摘　　要：针对软岩边坡蠕变效应开展系统性研究,建立软岩蠕变模型与锚索预应力损失模型的耦合分析框架,通过理论推导与数值模拟揭示岩石等效弹性模量的时效演化规律,并基于锚索预应力实测数据建立软岩蠕变参数反演方法。创新性地集成极限平衡理论与有限元分析技术,构建考虑预应力时变损失的路堑边坡稳定性综合评价体系。依托西南山区高速公路典型软岩路堑工程,结合十字锚固结构长达5年的预应力监测数据,定量预测边坡长期稳定状态并确定动态监测阈值。研究成果可为路堑边坡加固设计优化与全生命周期安全管控提供理论支撑,对保障交通基础设施安全运营具有重要工程价值。A coupled analysis framework integrating soft rock creep model and anchor cable prestress loss model was established via systematically investigating the creep effects in soft rock slopes.Through theoretical deriva-tion and numerical simulation,the time-dependent evolution law of equivalent elastic modulus of rock was revealed,and an inverse analysis method for soft rock creep parameters was developed based on measured anchor prestress data.A comprehensive evaluation system for cut slope stability considering time-varying prestress loss is constructed by innovatively combining limit equilibrium theory with finite element analysis technology.Taking a typical soft rock cut slope project on a southwest mountainous expressway as an engineering case,the long-term stability state of the slope was quantitatively predicted using monitoring data of cross-anchor prestress.At the same time,dynamic monitoring thresholds were established.The research results provide theoretical support for the optimization of cutting slope reinforcement design and life-cycle safety management,demonstrating signifi-cant engineering value for ensuring the safe operation of transportation infrastructure.

关 键 词：软岩边坡 蠕变损伤 预应力损失 稳定性系数 变形 

分 类 号：TU45[建筑科学—岩土工程]