摘要
多雨地区的碎裂岩质边坡病害是影响公路运营安全的重大问题,为进一步研究多雨地区复杂地质条件下山区公路碎裂岩体边坡变形破坏过程及机理,以广东省某高速公路K66+250~K66+534右侧边坡处治为例,以数值模拟和宏观分析为主要手段,通过对公路碎裂岩体边坡变形情况及稳定性进行详细分析。结果表明:碎裂岩体边坡的破坏滑面微观上表现出沿节理、层面发育的锯齿状或台阶状的特点,宏观上具有类土质的边坡圆弧状破坏模式,边坡变形过程具有明显递延式、渐进式、阶段性特点;采用“以桩为主,桩锚结合,锚为辅,结合地下水疏排”的综合治理思路成功治理了该边坡,并提出了该类公路边坡病害的动态防控措施和建议,具有一定的工程实践意义。
The fracturing of rock slopes in rainy regions is a significant issue affecting the operational safety of highways.To further study the deformation and failure process and mechanism of fractured rock slopes on mountainous highways under complex geological conditions in rainy areas,this paper made a detailed analysis on the stability and deformation of the fractured rock slope of the highway,taking the treatment of the slope on the right side from K66+250 to K66+534 of a certain expressway in Guangdong Province as an example,with numerical simulation and macroscopic analysis as the main means.The results show that:1)Microscopically,the failure sliding surface of the fractured rock slope exhibits the characteristics of serrated or stepped shapes developing along joints and bedding planes.Macroscopically,it has an arcshaped failure mode similar to that of soil slopes.The slope deformation process has obvious characteristics of being deferred,progressive,and phased;2)Based on this,the idea of"giving priority to piles,combining piles with anchors,taking anchors as supplementary,and integrating groundwater drainage"was adopted to successfully treat this slope,and dynamic prevention and control measures and suggestions for this type of highway slope diseases were put forward,which have certain engineering practical significance.
作者
李海平
阎宗岭
邵树强
王艳涛
LI Haiping;YAN Zongling;SHAO Shuqiang;WANG Yantao(China Merchants Chongqing Communications Technology Research&Design Institute Co.,Ltd.,Chongqing 400067;National Engineering&Research Center for Highways in Mountain Area,Chongqing 400067;China Railway Changjiang Transport Design Group Co.,Ltd.,Chongqing 401121)
出处
《公路交通技术》
2024年第6期14-20,共7页
Technology of Highway and Transport
基金
国家科技支撑计划项目(2015BAK09B01)
重庆市交通科技项目(2023KJ020A1)。
关键词
边坡病害
碎裂岩
变形阶段
动态防控技术
slope disease
fractured rock
deformation stage
dynamic prevention and control technology
