江苏连云港路堑岩质高边坡三角体稳定性分析  

Analysis on the Stability of Rock High Slope Triangle in Lianyungang, Jiangsu Province

作　　者：贾嘉 陈志坚[1] JIA Jia;CHEN Zhijian(School of Earth Science and Engineering,Hohai University,Nanjing 210098,China)

机构地区：[1]河海大学地球科学与工程学院,江苏南京210098

出　　处：《甘肃科学学报》2022年第5期94-99,共6页Journal of Gansu Sciences

基　　金：江苏省政策引导类计划(BY2015002-05)。

摘　　要：江苏省连云港市某路堑岩质高边坡坡高近200 m,虽已采用喷锚支护,但因路堑边坡开挖面与原废弃采石场开挖面构成不利组合而产生了两面临空的高位三角体稳定问题,支护锚杆的实测轴力超过设计警戒值。为此,采用赤平极射投影法、刚体极限平衡法与原型监测相结合的方法进行研究。结果表明:(1)边坡三角体沿底滑面存在剩余下滑力,导致锚杆轴力超过设计警戒值;(2)在不利工况条件下,三角体将产生滑动破坏;(3)三角体主动滑面为顺倾向压性断层,被动滑面为厚度1.5~2.5 m的反倾绿泥石片岩,滑动破坏时,绿泥石片岩被切穿。The slope of a cutting rock high slope in Lianyungang City of Jiangsu province is nearly 200 m.Although it has been shotshelled anchor support, because the excavation face of the cutting slope and the excavation face of the original abandoned quarry form an unfavorable combination, the stability problem of high triangle with two sides facing the air is generated.The measured axial force of the supporting bolt exceeds the design warning value.For this reason, the method of stereographic projection, rigid body limit equilibrium method and prototype monitoring are combined to study this problem.The results show that :(1) there exists residual sliding force along the bottom sliding surface of the slope triangle, which leads to the axial force of the bolt exceeding the design warning value;(2) Under adverse working conditions, the triangle will produce sliding failure;(3) The active sliding surface of the triangle is a baroward-trending fault, while the passive sliding surface is an antidip chlorite schist with a thickness of 1.5~2.5 m.In the case of sliding failure, chlorite schist is cut through.

关 键 词：岩质边坡 三角体 赤平极射投影 工程监测 刚体极限平衡法 

分 类 号：TB21[一般工业技术—工程设计测绘]