不同强度准则下结构性黄土边坡稳定性分析对比研究  

Comparative Study on Stability of Structural Loess Slope under Different Strength Criterion

作　　者：郑文 艾熙昭 刘光秀 ZHENG Wen;AI Xizhao;LIU Guangxiu(Department of Architectural Engineering,YuLin University,Yulin 719000,China;JINJIE Coal Preparation Plant,Washing Center of SHENDONG GROUP,Yulin 719000,China)

机构地区：[1]榆林学院建筑工程学院,榆林719000 [2]神东集团洗选中心锦界选煤厂,榆林719000

出　　处：《结构工程师》2019年第6期76-80,共5页Structural Engineers

基　　金：陕西省自然科学基金项目:陕北地区结构弱化导致的砂黄土边坡破坏与致灾机理研究(2019JQ-349)。

摘　　要：结构性是影响土物理力学特性的关键因素,结构性土的强度特性是土结构性研究的一个重要内容,结构性黄土存在拉剪破坏的可能,因此研究结构性黄土强度特性需要合理评价其抗拉强度,基于此,将已建立的不同结构性黄土强度准则引入强度折减有限元并进行边坡稳定性计算分析。结果表明:基于Mohr-Coulomb和联合强度两种理论所确定的潜在滑动面位置在荷载较小时没有明显差异。但是相同条件下前者计算出的安全系数比后者大,这种差异在含水量较小,结构性较强时比较显著;当含水量较大时,差异并不明显。Structural is one of the key factors influencing the mechanical characteristic of soil,the study on the strength of stixictural soil properties is an important content of the soil structural research.Structural loess has the possibility of tensile shear failure,so its tensile strength needs to be reasonably evaluated.Based on this,the established different structural strength criterions of loess strength are introduced into RMB reduction and the slope stability is calculated and analyzed.Results show that,when the load of the slope is small,there is no significant difference the indetermining the position of the potential sliding surface of the slope based on the Mohr-Coulomb and joint strength.But the former safety factor is larger than the latter in the same conditions,and this difference is more significant when the water content of the slope soil is small,on the contraiy,the difference is not big.

关 键 词：边坡 结构性参数 强度理论 强度折减有限元法 

分 类 号：TU43[建筑科学—岩土工程]