山区高速公路弃渣场边坡稳定性可靠度分析  

Reliability Analysis of the Slope Stability of the Soil Disposal Area in a Mountainous Highway Construction

作　　者：安正明 方正峰 周兴彤 柳治国 彭坤杰 AN Zhengming;FANG Zhengfeng;ZHOU Xingtong;LIU Zhiguo;PENG Kunjie(Guizhou Communications Construction Group Co.,Ltd.,Guiyang 550005;Guizhou Hongxin Chuangda Engineering Detection&Consultation Co.,Ltd.,Guiyang 550014;Guizhou Lutong Engineering Management Consulting Co.,Ltd.,Guiyang 550014;CCCC Second Highway Consultants Co.,Ltd.,Wuhan 430056)

机构地区：[1]贵州交通建设集团有限公司,贵阳550005 [2]贵州宏信创达工程检测咨询有限公司,贵阳550014 [3]贵州陆通工程管理咨询有限责任公司,贵阳550014 [4]中交第二公路勘察设计研究院有限公司,武汉430056

出　　处：《土工基础》2022年第4期626-629,共4页Soil Engineering and Foundation

基　　金：贵州省交通运输厅2020年度科技项目(2020-143-028)资助。

摘　　要：山区高速公路弃渣场具有弃渣料来源复杂且压实差异大等特点,其岩土力学参数具有随机性,进而导致弃渣场边坡稳定性具有更大的不确定性,研究弃渣场边坡稳定性的可靠度对于合理评价弃渣场的稳定性具有的工程实际意义。采用Monte-Carlo法建立弃渣场边坡稳定性可靠度分析模型,对贵州省六盘水至威宁高速公路K89+250右侧140 m弃渣场边坡的稳定性及其可靠度进行了研究。研究结果表明:该弃渣岩土力学参数具有明显的分布特征,其弃渣场边坡稳定性系数大于允许安全系数,而边坡处于不稳定状态的破坏概率为15.8%,为低危险状态,据此弃渣场边坡满足稳定安全要求;弃渣场边坡稳定性的安全系数计算和失稳概率分析能较好地反映了弃渣场稳定状态,可为弃渣场长期安全运营提供保障。The waste soil disposal area in a mountainous highway construction has the characteristics of complex disposal material sources and large compactive effort differences,and its geotechnical mechanical parameters are random,which leads to a greater uncertainty in the slope stability in the waste soil disposal area.The study on the reliability of the slope stability of the waste soil disposal area has a strong engineering practical significance for the reasonable evaluation of the stability of the waste soil disposal area.The Monte-Carlo method is used to establish the reliability analysis model of the slope stability of the waste soil disposal area,and the stability and reliability at the 140m soil disposal area on the right side of K89+250 of Liupanshui-Weining Expressway in Guizhou Province are studied.The results show that the geotechnical mechanical parameters of the soil disposal area have obvious distribution characteristics,the slope stability coefficient of the residues disposal area is greater than he allowable safety coefficient,and the failure probability of the slope in an unstable state is 15.8%,which is a low-risk state.Therefore,the slope of the waste soil disposal area meets the requirements of stability and safety.The calculated safety factor and instability probability analysis of the slope stability of the soil disposal area can reflect the stability of the waste soil disposal area,which can provide a guarantee for the long-term safe operation of the soil disposal site.

关 键 词：弃渣场 边坡稳定性 MONTE-CARLO法 可靠度分析 

分 类 号：P642[天文地球—工程地质学]