库水波动条件下滑坡体消落带响应关系研究  

Response Relationship of Riparian Zone of the Landslide Mass with Reservoir Water Fluctuation Conditions

作　　者：杨强[1] 叶振南[2] 高幼龙[1] 

机构地区：[1]中国地质调查局水文地质环境地质调查中心,河北保定071051 [2]中国地质大学,北京100083

出　　处：《灾害学》2014年第2期29-32,共4页Journal of Catastrophology

基　　金：中国地质调查局灾害研究项目(1212010814012);国家自然科学基金(41372332)

摘　　要：以三峡库区四道桥滑坡消落带作为研究对象，建立滑坡体孔隙水压力、水分含量及库水位实时监测系统，依托采集长期连续观测数据，开展库水位变化过程中滑坡体消落带地下水动态响应过程的研究。研究结果表明：库水位升降过程中，坡体内孔隙水压力变化趋势与库水位基本保持一致但相对滞后，上升时响应迅速，两者水位差为0．2m，下降过程受地下水回流影响滞后时间相对较长，最大水位差为1．5m，稳定在175m水位时候库水爬高0．1～0．2m；水分含量实测曲线很好反映了仪器安装层位岩土体的水分含量的变化规律，其响应规律与孔隙水压力变化规律相结合可较好地分析滑坡体消落带地下水渗流动态过程，其成果为数值模拟提供了可靠的数据支持，同时为类似岩土体构成的滑坡的研究提供借鉴。Taking Sidaoqiao landslide in Three Gorges Area as an example, real-time monitoring system of landslide pore water pressure, the water content and water level of reservoir is established. Based on the acquisition of long-term continuous observation data, dynamic process of riparian zone of the landslide mass in the process of change of reservoir water level is studied. Results show that the change trend of the pore water pressure in the land- slide mass is consistent with the reservoir water level during the fluctuation, but lags relatively behind. The re- sponse is fast with a 0.2 m water-head during the rising process, while the lag time is relatively long during the fall- ing process, whose maximum water-head is 1.5 m. The water content curve measured reflects the variation of the water content of the soil beside the instrument, and the dynamic process of the groundwater seepage is analyzed by the combination of the variation law of pore water pressure and water content, the results of which can provide relia- ble data support for numerical simulation, and provide reference for the research of landslides with similar geoteeh- nical engineering conditions at the same time.

关 键 词：三峡库区 消落带 库水位升降 渗流场 响应关系 

分 类 号：P642.22[天文地球—工程地质学] X43[天文地球—地质矿产勘探]