中山市大型滑坡地质灾害隐患点稳定性综合分析  

A COMPREHENSIVE ANALYSIS ON THE STABILITY OF HIDDEN DANGER POINTS OF GEOLOGICAL DISASTERS OF LARGE LANDSLIDES IN ZHONGSHAN CITY

作　　者：梅伟标 金炯球 陈尚丰 MEI Wei-biao;JIN Jiong-qiu;CHEN Shang-feng(Guangdong Geological Disaster Emergency Rescue Technology Center,Guangzhou 510410,China)

机构地区：[1]广东省地质灾害应急抢险技术中心,广州510410

出　　处：《地质灾害与环境保护》2020年第3期25-33,共9页Journal of Geological Hazards and Environment Preservation

摘　　要：中山某采石场边坡宽600 m,高95 m,坡度50°~65°,以岩质边坡为主,上部覆盖土层,为大型滑坡地质灾害隐患点。滑坡隐患点坡顶建有中山市气象灾害预警监测信息发布中心,坡脚建有中山市气象科学生态公园,整个项目投资达1.5亿元人民币。2019年3月26日,滑坡隐患点边坡局部发生滑坡地质灾害,严重威胁了气象灾害预警监测信息发布中心、气象科学生态公园的运营安全。本文通过传统的环境地质调查,结合先进仪器,如大型无人机、三维激光测量仪等,获取了现场大量基础地质资料,高清晰实时影像资料。采用极限平衡法、赤平投影法分别对岩土质(土质)边坡及岩质边坡进行稳定性计算,得到了滑坡隐患点边坡在自然条件和暴雨条件下的稳定性状态。并以高精度地形图为依托,建立了三维地质模型,通过midas GTS NX有限元分析软件,采用强度折减法进行了三维数值模拟计算。从而较全面的评价了滑坡地质灾害隐患点整体稳定性状况,为今后滑坡地质灾害治理工程提供了科学合理的数据支持。The slope of a quarry in Zhongshan is 600 m in width, 95 m in height and 50°~65° in slope. The rock slope is mainly composed of rock slope, and the upper part is covered with soil layer. Zhongshan meteorological disaster warning and monitoring information release center has been built on the top of the slope of the hidden danger point of the landslide, and zhongshan meteorological science and ecology park has been built at the foot of the slope, with the investment of the whole project reaching 150 million yuan. On March 26, 2019, landslide geological disaster occurred in part of the slope at the hidden danger point of the landslide, which seriously threatened the operation safety of the meteorological disaster monitoring and warning information release center and the meteorological science and ecology park. In this paper, through the traditional environmental geological survey, combined with advanced instruments, such as large unmanned aerial vehicle, 3 d laser measuring instrument, etc., a large number of basic geological data and high-resolution real-time image data were obtained. The ultimate equilibrium method and the red plane projection method are used to calculate the stability of rock and soil slope and rock slope respectively. Based on the topographic map with high precision, a 3 d geological model was established, and the 3 d numerical simulation was carried out by the strength reduction method through the Midas GTS NX finite element analysis software. Therefore, the overall stability of the hidden danger point of landslide geological hazard is evaluated comprehensively, which provides scientific and reasonable data support for landslide geological hazard management project in the future.

关 键 词：滑坡隐患点 稳定性分析 极限平衡法 赤平投影法 强度折减法 

分 类 号：P642.22[天文地球—工程地质学]