青川浅层滑坡降雨入渗及稳定性研究  

Rainfall infiltration and stability of shallow landslide in northern Sichuan

作　　者：赵磊 付昱凯[1,2] 陈春利[3] 李同录 李萍[1,2] 王晨兴[1,2] ZHAO Lei;FU Yukai;CHEN Chunli;LI Tonglu;LI Ping;WANG Chengxing(School of Geological Engineering and Geomatics,Chang'an University,Xi'an 710054;Field Observation and Research Station of Water Cycle and Geological Environment on the Loess Plateau,Ministry of Education,Zhengning 745399;China Institute of Geo-Environment Monitoring,Beijing 100081,China)

机构地区：[1]长安大学地质工程与测绘学院,西安710054 [2]黄土高原水循环与地质环境教育部野外科学观测研究站,正宁745399 [3]中国地质环境监测院,北京100081

出　　处：《干旱区资源与环境》2022年第1期111-119,共9页Journal of Arid Land Resources and Environment

基　　金：国家重点研发计划(2018YFC1505503);长安大学中央高校基本科研业务费专项资金(300102261507);国家自然科学基金(No.41877242)资助。

摘　　要：降雨作为诱发碎石土浅层滑坡的主要因素之一,通过渗流作用降低滑带土的抗剪强度,从而导致滑坡失稳。为了进一步研究这种滑坡的降雨蒸渗过程及其对滑坡稳定性的影响,本次以青川县后山里滑坡为研究对象,对该滑坡区的大气温湿度、土体含水率、地下水位及蒸渗量进行了持续监测,基于监测数据分析了降雨对滑坡地下水位及土体含水率的影响,并提出了研究区的降雨入渗率经验公式。最后考虑降雨入渗对地下水位的影响,对滑坡进行了稳定性计算分析,提出了诱发滑坡失稳的临界降雨强度。As one of the main factors to induce shallow landslide in gravel soil, rainfall reduces the shear strength of the soil in sliding zone through seepage, then leads to slope instability. In order to further study the process of evaporation and infiltration and its influence on slope stability, the Houlishan landslide in Qingchan county was selected as the research object. The air temperature, relative humidity, soil moisture content, groundwater level and evapotranspiration in the landslide area were monitored continuously. Based on monitoring data, the influence of rainfall on groundwater level and soil moisture content of landslide was analyzed. Meanwhile, the empirical formula of rainfall infiltration rate was proposed. Finally, the stability of landslide was calculated and analyzed due to the influence of rainfall infiltration on groundwater level, and the critical rainfall intensity which induced landslide instability was proposed.

关 键 词：浅层滑坡 降雨入渗率 地下水位 含水率 稳定性 

分 类 号：P642.22[天文地球—工程地质学]