不同修复工况下破损山体公路边坡稳定性评价  

Stability Evaluation of Damaged Mountain Highway Slope under Various Ecological Restoration Context

作　　者：贾起超 郝喆 孙杰 申城 JIA Qi-chao;HAO Zhe;SUN Jie;SHEN Cheng(College of Environmental Sciences,Liaoning university,Shenyang Liaoning 110036,China)

机构地区：[1]辽宁大学环境学院,辽宁沈阳110036

出　　处：《环境科学导刊》2023年第5期68-73,共6页Environmental Science Survey

基　　金：辽宁省自然科学基金项目(20180550192);辽宁省科技计划项目(2019JH8/10300107);辽宁省科技计划项目(2020JH2/10300100);辽宁省科技计划项目(2019JH8/10300105)。

摘　　要：以浙江省定马线长春岭某公路边坡为例,采用GEO-STUDIO软件进行生态修复后公路破损山体边坡稳定性评价。首先对修复前原始边坡稳定性进行分析;然后进行边坡整形后依据规范制定锚杆支护方案,对支护后破损山体边坡稳定性进行分析;再对植物栽植后山体边坡进行稳定性分析。设定了正常工况、非正常工况Ⅰ和非正常工况Ⅱ三种工况,在三种工况下又分三种情况:原始裸岩边坡、整形+锚杆支护边坡、支护+覆土+植物栽植边坡。分析结果表明:正常工况下,原始裸岩边坡,整形+锚杆支护边坡,支护+覆土+植物栽植边坡三种状态的边坡稳定性系数提高0.196~0.232,说明边坡支护和生态修复均有利于边坡稳定;非正常工况Ⅰ与Ⅱ下的边坡安全系数比正常工况下的边坡安全系数有所降低。稳定性评价结果表明,破损山体在三种运行工况下,经过锚杆整形支护和覆土植物栽植后边坡更加安全稳定。In this paper,the highway slope in Changchunling of Dingma Line in Zhejiang Province was taken as an example,and GEO-STUDIO software was used to evaluate the stability of the damaged mountain slope after ecological restoration.Firstly,the stability of the original slope before restoration was analyzed.According to the standard,a staggered bar support scheme was developed to analyze the stability of damaged mountain slope after support.Then the stability of mountain slope after plant planting was analyzed.According to the specification,three kinds of working conditions were set up:normal working condition,abnormal working conditionⅠand abnormal working condition II.Under the three working conditions,three kinds of conditions were divided respectively.They were original bare rock slope,shaping+bolt supporting slope and supporting+soil covering+plant planting slope.The results showed that the stability coefficient of the slope was increased by 0.196~0.232 under the three ecological restoration conditions of the original bare rock slope.The slope supported by reshaping 1 anchor rod,the slope supported+soil covered+plant planted,indicated that the ecological restoration was beneficial to the stability of the slope.The slope safety factor of abnormal conditionⅠandⅡunder the slope safety factor decreased much than the normal working conditions.The stability evaluation results showed that the soil slope became more secure and stabile when the damaged mountain was under three operating conditions of plastic anchor supporting and plant after turns.

关 键 词：公路边坡 稳定性 生态修复 锚杆支护 破损山体 

分 类 号：X826[环境科学与工程—环境工程]