滇东北某运营期高速公路边坡失稳特征与成因分析  

Analysis of the Slope Instability of an Operative Expressway in Northeast Yunnan

作　　者：田冉 张军 叶咸 TIAN Ran;ZHANG Jun;YE Xian(Sichuan Institute of Geological Engineering Investigation Group Co.Ltd.,Chengdu,610036;National Engineering Laboratory for Surface Transportation Weather Impact Prevention,Broadvision Engineering Consultants,Kunming,650041)

机构地区：[1]四川省地质工程勘察院集团有限公司,成都610036 [2]云南省交通规划设计研究院有限公司陆地交通气象灾害防治技术国家工程实验室,昆明650041

出　　处：《土工基础》2022年第2期158-162,共5页Soil Engineering and Foundation

摘　　要：红层由于岩性上偏软,一般将其定性为软岩,在冷热、干湿循环作用下,岩体容易出现风化、遇水易崩解的现象,工程地质特性极差,高速公路红层边坡的病害具有高度隐蔽性。由于目前仍缺乏相应的公路边坡养护技术规范,在运营期高速公路上,养护人员难以准确把握公路边坡的安全技术状况,不利于提出针对性的养护措施。以滇东北运营期高速公路边坡为例,通过工程地质勘察,查明了边坡失稳的特征,并进行分析,提出边坡防护工程失效及地下水是边坡失稳的主要诱因,为该边坡提供了后期发展预测和处治建议。Due to its soft lithology,the red bed rock is generally characterized as the soft rock in the engineering geology industry.Under the action of the cold,hot temperature dry,wet moisture cycles,the rock mass is easy to be weathered and disintegrated in the water.The engineering geological characteristics of this rock mass are extremely poor,and the highway geo-hazards induced by the red bed rock slope is not easily to be detected.Due to the lack of corresponding highway slope maintenance technical specifications,it is difficult for maintenance personnel to accurately grasp the highway slope safety in the operation,which is to propose targeted maintenance measures at right time.This paper presents a stability evaluation case history of the expressway in Northeast Yunnan Province.Throughout the engineering geological survey,the characteristics of slope instability are evaluated.The failure of the highway slope was mainly induced by the failure of the slope protection measures and the presence of the excessive groundwater.The stability development of the slope and the potential mitigation measures are also proposed.

关 键 词：运营期 高速公路 红层边坡 锚固工程 成因分析 

分 类 号：P642[天文地球—工程地质学]