四川山区公路顺层边坡稳定性研究现状及展望

张乐; 向波; 张俊云; 冯君; 刘正威

doi:10.20174/j.JUSE.2025.S1.62

地下空间与工程学报 >

2025 , Vol. 21 >Issue S1: 529 - 538

DOI: https://doi.org/10.20174/j.JUSE.2025.S1.62

防灾与环境

四川山区公路顺层边坡稳定性研究现状及展望

张乐 ,
向波 ,
张俊云 ,
冯君 ,
刘正威

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1.西南交通大学土木工程学院,成都 610031;
2.四川省公路规划勘察设计研究院有限公司,成都 610041;
3.四川公路桥梁建设集团有限公司,成都 610041

张乐(1996—),男,河南三门峡人,博士生,工程师,主要从事公路特殊路基与地质灾害防治方面的研究工作。E-mail:if_1996@126.com

向波(1973—),男,四川荣县人,博士,教授级高级工程师,主要从事公路工程地质灾害防治等领域的研究工作。E-mail:xiangbo@schdri.com

收稿日期: 2025-05-05

网络出版日期: 2025-09-03

基金资助

交通运输部重点科技项目(2021-ZD1-019);四川省交通运输科技项目(2024-ZL-02);中铁五局集团成都工程有限责任公司科研项目(2024JHKJ10553)

收起

Research Status and Prospect of Highway Bedding Slope Stability in Sichuan Mountain Areas

Zhang Le ,
Xiang Bo ,
Zhang Junyun ,
Feng Jun ,
Liu Zhengwei

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1. School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, P. R. China;
2. Sichuan Highway Planning, Survey, Design and Research Institute Ltd., Chengdu 610041, P. R. China;
3. Sichuan Road and Bridge Group Co., Ltd., Chengdu 610041, P. R. China

Received date: 2025-05-05

Online published: 2025-09-03

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摘要

针对四川山区公路顺层边坡成灾复杂、严重威胁工程建设和运营安全的现状,从侧壁约束下的成灾特征、滑带土强度特性、首次失稳长度确定和稳定性评价4方面,系统总结了近年来的研究成果,并提出展望。结果表明:(1)侧壁约束下的顺层边坡,其主滑方向多偏离岩层倾向,多面临空环境下顺层边坡准确定义和下滑力确定方法有待进一步研究;(2)顺层边坡滑带土强度特性研究宜取原状滑带土为研究对象,剪切强度获取应通过环剪试验等大位移剪切进行,结合原状土物质组成和细观结构进行分析;(3)顺层边坡首次失稳长度仿真计算可综合底滑面塑性区和应力、位移特征确定,理论解析法主要通过滑面不同应力状态的划分进行,统计分析确定的经验公式相对更易应用,但仍需深入研究岩层与边坡走向夹角的影响,及回归公式中各系数的合理性;(4)顺层边坡牵引式渐进性破坏的稳定性评价,依赖于滑带土的应变软化分析,应变软化本构关系是服务仿真计算和理论推导的核心,应变软化的过程研究能够支撑稳定性精细化评价。

关键词： 顺层边坡; 公路; 侧壁约束; 滑带土; 首次失稳长度; 稳定性评价

本文引用格式

张乐 , 向波 , 张俊云 , 冯君 , 刘正威 . 四川山区公路顺层边坡稳定性研究现状及展望[J]. 地下空间与工程学报, 2025 , 21(S1) : 529 -538 . DOI: 10.20174/j.JUSE.2025.S1.62

Abstract

In response to the complex failure mechanisms of bedding slopes along highways in Sichuan mountain areas, which pose significant threats to engineering construction and operational safety, this study systematically reviews recent research achievements from four aspects: failure characteristics under lateral constraints, strength properties of slip zone soils, determination of the initial instability length, and stability evaluation, while proposing future research directions. The results show that: (1) For bedding slopes under lateral constraints, the primary sliding direction often deviates from the dip direction of rock strata, necessitating further investigation into the determination of sliding forces and the classification of bedding slopes in multi-face free-surface environments. (2) Research on the strength properties of slip zone soils should prioritize undisturbed samples, with shear strength parameters obtained through large-displacement shear tests (e.g., ring shear tests), complemented by analyzing material composition and mesostructure. (3) The initial instability length can be determined via numerical simulation by integrating plastic zone characteristics, stress distribution, and displacement patterns at the basal sliding surface. Theoretical approaches rely on stress state partitioning along the slip surface, while empirical formulas derived from statistical analysis offer greater practicality. However, further investigation is required regarding the influence of the angle between rock strata and slope strike, as well as the rationality of coefficients in regression models. (4) Stability evaluation of retrogressive progressive failure in bedding slopes depends on strain-softening analysis of slip zone soils. The constitutive relationship governing strain-softening behavior serves as the cornerstone for both numerical modeling and theoretical derivation. Refined characterization of strain-softening processes will enhance the precision of stability assessments.

Key words： bedding slope; highway; lateral constraints; slop zone soil; initial instability length; stability evaluation

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