摘要
云南保山师专2001年7月发生中型滑坡,上千名师生的安全受到严重威胁。斜坡变形量逐渐加剧,1个月后总位移量近60cm,且前缘平台出现鼓丘,隆起高度1 20m。经采用袋装土反压前缘应急措施后,滑坡暂时得以控制。勘察发现滑坡的形成在于不合理的开挖边坡,其上软弱土体夹层经近期地震作用,经受超常强降雨持续渗入坡体,使之重度增加,强度降低,以及坡体上建筑物之荷载,增加了下滑力。滑坡防治采用抗滑桩加重力式抗滑挡墙,辅以地表、地下排水工程等综合治理方案。2002年9月治理工程全部完工,经监测证实治理效果良好。
A medium landslide happened in Yunnan Baoshan Teachers' College in July, 2001, which threatened more than one thousand people seriously. The displacement increased gradually to a total sum of 60cm one month later, and some small hillocks occurred on the front platform with a height of 1.20m. The landslide was controlled temporarily after the bagging soils had been put on the front platform where the small hillocks occurred. It was revealed through exploration that the landslide was due to the improper excavation of feeble clay layer distributed on the slope and the recent earthquake,as well as the unusual rainfall seeping into the slope soil continuously and leading an increase of gravity and a decrease of shearing strength of the soil body. In addition, buildings on the top of the slope also increased the sliding force. Anti-sliding piles and gravitational concrete wall together with drainage engineering for both surface and underground water were taken as the control measures. The control engineerings were completed in September, 2002, and they are proved excellent by displace ment monitoring.
出处
《中国地质灾害与防治学报》
CSCD
2004年第3期6-10,共5页
The Chinese Journal of Geological Hazard and Control
关键词
中层复合式滑坡
地表变形迹象
滑坡成因
治理工程
medium-level complicated landslide
surface deformation indication
cause of landslide formation
control engineering
