沟谷路堤边坡设计与稳定性分析

Design and Stability Analysis on Side Slope of Valley Embankment

路堤废石场边坡的稳定性直接关系到顶部运输平台车辆行驶的安全,因此其稳定性设计和分析至关重要。为了确保废石场后期的安全使用与边坡稳定,根据工程地质条件,采用有限差分程序FLAC2D和极限平衡程序Slide对该废石场设计的边坡结构在天然、地震、降雨三种工况条件、不同荷载作用下进行稳定性计算。计算结果表明:荷载Ⅰ作用边坡时,废石场边坡在三种不同工况下满足安全等级及规范要求;当荷载Ⅱ作用于边坡时,在天然和地震工况下,边坡安全系数满足安全等级及规范要求要求,在降雨工况时安全系数Fs明显降低,小于安全等级及规范要求1. 15。因此,建议在后期运输过程中允许TR100型号卡车一辆重车、一辆空车共同作业于边坡顶部,禁止两辆重车并排同时作用于边坡顶部平台,同时做好对该废石场边坡的变形监测。

The stability of side slope of the embankment waste-rock yard has a direct impact on driving safety of top platformtruck,therefore,the stability design and analysis is very important. The stability calculation of the side slope designed for the waste-rockyard under the natural,earthquake,and rainfall conditions with the different load effect is carried out by using of finite difference programFLAC2Dand limit equilibrium program slide,according to the engineering geological conditions and in order to guarantee the later safe handling and side slope stability of the waste-rock yard. The calculation results show：the waste-rock yard can meet the safety level and standard requirements with three different working conditions when load Ⅰ acting on the side slope;the safety factors of side slope can meet thesafety level and standard requirements with the natural and earthquake working conditions,when load Ⅱ acting on the side slope,the safetyfactor Fs decreased obviously with the rainfall working condition,the factor is less than 1 15 of the safety level and standard requirement. Itis suggested that one loaded TR100 truck,one empty TR100 truck can operated together on the top of side slope during the later transportation,it is forbidden two loaded truck operated side by side at the same time on the top platform of the side slope,and the deformation of theside slope of the waste-rock yard shall be supervised simultaneously.