滑坡损毁公路路基重建的治理效果评价——以贵州G326国道滑坡损毁路基重建工程为例  

Evaluation of prevention effect of highway subgrade reconstruction damaged by a landslide—An example of a reconstruction of G326 highway damaged by a landslide in Guizhou Province

作　　者：张亚 刘仕洪 雷青 姜波 郭华江 ZHANG Ya;LIU Shihong;LEI Qing;JIANG Bo;GUO Huajiang(Tongren Highway Administration Bureau of Guizhou Province,Tongren 554200,China;Guizhou Transportation Planning Survey&Design Academy Co.,Ltd.,Guiyang 550003,China)

机构地区：[1]贵州省铜仁公路管理局,贵州铜仁554200 [2]贵州省交通规划勘察设计研究院股份有限公司,贵州贵阳550003

出　　处：《安全与环境工程》2024年第6期145-151,共7页Safety and Environmental Engineering

基　　金：国家自然科学基金项目(42077239)。

摘　　要：山区公路易受到滑坡等灾害的威胁从而造成路基损毁,在对其进行恢复重建时,需综合评价治理工程的防治效果。以贵州省G326国道的滑坡损毁路基重建工程为研究对象,模拟强降雨诱发滑坡的变形破坏过程,采用了削方、抗滑桩、锚索等不同组合的治理方案,并评价了各种治理方案的防治效果。结果表明:随着降雨量的增加,滑坡变形从滑坡前部G326国道附近逐渐向后缘扩展,在7月8日时滑坡整体出现塑性破坏;削方+抗滑桩+锚索组合治理下,滑坡主滑区最大位移为3.1 mm,后缘最大位移为1.7 mm;抗滑桩+锚索组合结构优化了滑坡的受力状态,使整体变形处于可控范围内,保证了重建公路路基的安全。该研究对滑坡损毁公路路基工程的重建具有一定的参考价值。Highway in mountainous areas is vulnerable to landslide disasters,which may lead to the damage of subgrade.It is necessary to comprehensively evaluate the prevention and control effect of the treatment project when the subgrade is reconstructed after landslide damage.A reconstruction project of G326 highway damaged by a landslide in Guizhou Province was taken as an example.The landslide deformation and failure process in⁃duced by heavy rainfall was simulated.The prevention and control effect of different treatment schemes was an⁃alyzed and evaluated,such as the different prevented schemes of slope cutting,anti-slide pile and pile with pre⁃stress anchor cable.The results show that the deformation gradually expanded from the front of the landslide near G326 highway,to the head of the landslide with the increase of rainfall,and the plastic state occurred in the whole landslide body on July 8.After the combined treatment of slope cutting and anti-slide pile with pre⁃stress anchor cable,the maximum displacement of the landslide main area is 3.1 mm,and the maximum is 1.7 mm in the head of the landslide.The structure of anti-slide pile with prestress anchor cable optimizes the stress state of the landslide and makes the deformation of the whole landslide in a controllable and acceptable range,which ensures the safety of highway subgrade reconstruction.This research has some reference value for the highway reconstruction after a landslide.

关 键 词：滑坡灾害 滑坡损毁路基 路基重建 锚拉桩 治理效果评价 

分 类 号：X43[环境科学与工程—灾害防治] P642.22[天文地球—工程地质学]