天花板水电站田坝村堆积体地质-力学机理-形变耦合分析预警  

Geology-Mechanism-Deformation Coupling Analysis and Early Warning of Tianba Village Landslide,Tianhuaban Hydropower Station

作　　者：刘昕昕 汤明高[1] 王李娜 向育才 吴辉隆 LIU Xin-xin;TANG Ming-gao;WANG Li-na;XIANG Yu-cai;WU Hui-long(State Key Laboratory of Geohazard Prevention and Geoenvironment Protection,Chengdu University of Technology,Chengdu 610059,China)

机构地区：[1]成都理工大学,地质灾害防治与地质环境保护国家重点实验室,成都610059

出　　处：《科学技术与工程》2021年第20期8350-8359,共10页Science Technology and Engineering

基　　金：国家自然科学基金面上项目(41977255);四川省科技计划(2019YJ0403)。

摘　　要：为有效开展水库滑坡监测预警工作,以牛栏江近坝库段田坝村堆积体为例,通过全球定位系统(global positioning system,GPS)位移监测数据分析和数值模拟的方法研究了堆积体的变形模式并建立了地质-力学机理-形变(geology-mechanism-deformation,GMD)预警模型。结果表明:田坝村堆积体为受库水位骤降因素控制的渐进后退式滑坡;使用改进收敛标准的自编命令强度折减法和动态流-固-时间耦合的模拟方法建立的田坝村堆积变形量预警阈值和库水位下降速率预警判据,可为堆积体的监测预警工作及水库水位的安全调动提供参考依据。In order to implement the monitoring and warning work of reservoir landslides effectively.The Tianba Village landslide near the dam of the Niulan River was taken as an example,the analysis of global positioning system(GPS)displacement monitoring data and numerical simulation were used to study the deformation mode of landslide accumulation,which established the geology-mechanism-deformation(GMD)early warning model.The results demonstrated that Tianba Village landslide is a progressive backward landslide controlled by the sudden drop of the reservoir water level.The self-made command strength reduction method with improved convergence standard and the dynamic fluid-solid-time coupling simulation method are used,the early warning threshold of accumulation deformation and the early warning criterion of water level decline rate in Tianba Village are established,which can provide reference for the monitoring and warning work of accumulation and the safe adjustment of reservoir water level.

关 键 词：动水压力型滑坡 渐进后退式 地质-力学机理-形变(GMD) 滑坡预警 数值模拟 

分 类 号：P642.22[天文地球—工程地质学]