无锡市雪浪山滑坡监测及诱发因素分析

为研究无锡市雪浪山滑坡的成因机理,在滑坡后缘岩体裂缝处布置了4支裂缝计并开展了连续监测,获取岩体裂缝1~4月份的活动性特征。监测及研究表明:边坡顺层及泥岩夹层是雪浪山滑坡的两大内因,降水及低温则是该处滑坡的两大外在诱发因素;日降水量20 mm、前2 d累积降水量30~40 mm、前3 d累积降水量40~50 mm,可作为雪浪山滑坡地质灾害预警预报的临界预警指标。

Analysis of landslide monitoring and inducing factors of Xuelang Mountain in Wuxi

In order to study the formation mechanism of Xuelang Mountain landslide，four sensors were suc- cessfully set up． On the basis of continuous monitoring from January to April，the activity characteristics of rock fis- sures on trailing edge of landslide were obtained． Monitoring and research shows that consequent slope and mud- stone interlayer are the two major internal factors，while precipitation and low temperature are the two major in- duced factors． The daily precipitation of 20 mm，the accumulation precipitation 30 ～40 mm in the first two days or 40 ～50 mm in the first three days can be used as the critical early warning index for geological disaster warning and forecasting．