开挖扰动下的风化卸荷边坡变形分析及处理措施  

Deformation Analysis and Mitigation Measures of Weathering and Unloading Slopes Under Excavation Disturbance

作　　者：孙斌[1] 许建军 段军邦 SUN Bin;XU Jianjun;DUAN Junbang(PowerChina Northwest Engineering Corporation Limited,Xi′an,Shaanxi 710065,China;Qinghai Yellow River Upper Reaches Hydropower Development Co.,Ltd.,Xining,Qinghai 810000,China)

机构地区：[1]中国电建集团西北勘测设计研究院有限公司,陕西西安710065 [2]青海黄河上游水电开发有限责任公司,青海西宁810000

出　　处：《水利与建筑工程学报》2024年第6期155-160,180,共7页Journal of Water Resources and Architectural Engineering

基　　金：陕西省自然科学基础研究计划“降雨诱发的黄土加筋挡土墙失稳机理研究”(2023-JC-QN-0630)。

摘　　要：依托某水电工程交通隧洞洞口边坡松弛变形处理工程,分析边坡变形的成因,并结合地质勘察资料及现有边坡稳定情况,通过计算反演地质参数,验证边坡的整体稳定性。通过反推计算所需的加固力,提出相应的治理措施。结果表明:初拟的三号滑动面在正常、暴雨(完全饱和)、暴雨(饱和深5 m)及地震工况下均不满足稳定要求。计算得出各种工况不同条件下单位宽度所需的抗滑力,并提出相应的治理措施。通过实施边坡加固、坡面防水和坡体排水等综合措施,可以有效改善边坡的稳定性。Based on the relaxation and deformation treatment project of the slope at the entrance of a traffic tunnel for a hydropower engineering project,this work conducted an in-depth analysis of the causes of slope deformation.By integrating geological survey data and the current slope stability conditions,the overall stability of the slope is verified through the inverse calculation of geological parameters.Furthermore,the required reinforcement forces are derived through reverse calculations,leading to the proposal of corresponding mitigation measures.The reverse calculation indicates that the initially proposed sliding surface No.3 does not meet stability requirements under normal conditions,heavy rainfall(fully saturated),heavy rainfall(saturation to a depth of 5 m),and seismic conditions.For these scenarios,the required anti-slip force per unit width is calculated,and appropriate remedial measures are suggested.The research results demonstrate that implementing a combination of slope reinforcement,surface waterproofing,and slope drainage measures can effectively improve slope stability.

关 键 词：松弛变形 破坏模式 参数反演 稳定分析 支护处理 

分 类 号：U213.13[交通运输工程—道路与铁道工程]