构造控制风化岩边坡侧旋滑移及监测结果映现——以高陂水利枢纽右岸边坡为例  

Structure Controlled Rotation Displacement of Weathered Rock Mass Slope and its Reflection in Monitoring Results——Taking the Slope on the Right Bank of Gaobei Key Water Control Project as One Case Study

作　　者：刘震涛 尚彦军[2,3,4] 邵鹏 Liu Zhentao;Shang Yanjun;Shao Peng(Engineering Construction Management Department of Gaobei Water Control project of Hanjiang River at Dapu of Meizhou, Meizhou,Guangdong,514011,China;Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing,100029,China;University of Chinese Academy of Sciences,Beijing,100049,China;Xinjiang Institute of Engineering,Urumqi,Xinjiang,830023,China)

机构地区：[1]广东省梅州市大埔韩江高陂水利枢纽工程建设管理处,广东梅州514011 [2]中国科学院地质与地球物理研究所,北京100029 [3]中国科学院大学,北京100049 [4]新疆工程学院,新疆乌鲁木齐830023

出　　处：《新疆地质》2019年第3期395-400,共6页Xinjiang Geology

基　　金：新疆维吾尔自治区十三·五重点专业建设“地质工程”项目，国家自然基金面上项目（41772320）;地质灾害防治与地质环境保护国家重点实验室项目（SKLGP2017K021）

摘　　要：本文以梅州市大埔韩江高陂水利枢纽右岸边坡为例,据现场工程地质勘察、钻探开挖揭露和坡体变形监测数据,分析该风化花岗岩边坡地质特点及不同开挖阶段监测点的位移。发现该边坡的滑移受到地质构造控制:断裂控制其后缘拉裂缝;节理密集带控制东边界侧缘沟谷;与斑状花岗岩相伴生的辉绿岩脉控制其西边界。工程上采取关闭滑体中部通过的公路、补充地质勘探、加强变形体监测、滑体中上部快速削方卸载、保护好西缘辉绿岩脉之下起抗剪支撑作用的块状斑状花岗岩体、减少西侧缘坡脚开挖范围并及早回填砼挡土墙、滑坡前缘跳槽式开挖等工程抢险和加固处理措施,取得了预期效果,保证了坡脚尾水房挡土墙下挖期间的施工安全。The geological characteristics of the weathered granite slope and the three-dimensional deformatiopn vectors of monitoring points at different excavation and unloading stages are analyzed by means of geological structure analysis, drilling logging and external deformation monitoring.The results show that faults control the trailing edge tension cracks and joint-intensive zones.The eastern edge valleys, and the diabase veins associated with porphyry granite control the western boundary of the slope. Clockwise right-handed sliding failure occurs in the slope.In view of the clockwise dex- tral slip form of the slope,the provincial highway passing through the middle part of the sliding body was quickly closed, supplementary geological investigation was made,deformation monitoring was strengthened,the upper part of the sliding body was quickly excavated and unloaded, the massive porphyry granite under the diabase of the western margin is well protected,the excavation scope of the foot of the western margin was reduced.As a result,the adverse effects of the land- slide on the project were minimized and the construction safety of the tailrace house at the foot of the slope was guaran- teed during the excavation under the retaining wall.

关 键 词：水利枢纽 风化岩边坡 构造控制 辉绿岩脉 侧旋滑移 

分 类 号：P642.22[天文地球—工程地质学]