硬质岩变形边坡深孔位移监测曲线表征分析  

Analysis of the Characteristics of Deep-hole Displacement Monitoring Curve in Hard Rock Deformation Slope

作　　者：张鹏 胡惠华 龚道平 胡杰 ZHANG Peng;HU Huihua;GONG Daoping;HU Jie(Hunan Provincial Communications Planning,Survey&Design Institute,Changsha 410219,China)

机构地区：[1]湖南省交通规划勘察设计院有限公司,长沙410219

出　　处：《路基工程》2022年第3期67-72,共6页Subgrade Engineering

基　　金：湖南省交通运输厅科技进步与创新计划(201003)。

摘　　要：通过对湖南省汝郴高速公路吊坎垄陡峭高大硬质岩边坡深部的位移监测,分析了水平位移监测曲线特征。结果表明:“Z”(反“Z”)字型突变是软硬岩层相间和裂缝及测斜管与钻孔壁之间空洞问题造成的,属岩体内部局部变形,对边坡整体稳定影响不大;在一定条件下,温度对岩体监测位移有较大影响,位移会随时间的变化呈年周期起伏变化;测斜管的扭转对位移监测曲线影响大,会对坡体真实状态造成错误的判断;研究边坡失稳源在坡体下部,此类硬质岩边坡变形初期监测曲线规律性不强是其主要特征。Through deep displacement monitoring of a steep high hard rock slope of hanging camp cage of Yucheng expressway in Hunan,the characteristics of the horizontal displacement monitoring curve have been analyzed.The result shows that the"Z"(reversed"Z")character mutation is caused by the crack between soft and hard rock strtum and the hole between the inclined pipe and the borehole wall,which is a local rock internal deformation and has little influence on the overall stability of the slope.The temperature has a great effect on the rock mass displacement monitoring under certain conditions,and the displacement will fluctuate with time in annual cycle.The displacement monitoring curve is influenced and the real state of slope will misjudged because of the torsion of inclinometer.The source of slope instability in the toe of slope is studied,and in the initial period of hard rock slope deformation,its main characteristic is the weak regularity of the monitoring curve.

关 键 词：硬质岩边坡 深孔 位移监测 测斜管 失稳源 

分 类 号：U213.13[交通运输工程—道路与铁道工程]