摘要
广州华南路三期工程第B3标段,大部分钻探孔均出现岩溶现象。发育于石炭系中上统壶天群灰岩中,深度一般为14.50m～47.20m不等;溶洞处于充填、半充填状态,部分为空溶洞,充填物多为软塑状粘土;地下水活动较为强烈;溶洞顶板薄,规模大,在自然条件下存在产生塌陷的隐患。对其产生的原因进行了分析,并提出了处理方法和预防措施。
The most boring holes are in the Karst region in Huanan Road Engineering in Guangzhou,which are developed in the Hutian limestone of middle-upper carbonic and the depth is about 14.50 m^47.20 m. Karst caves are full filled,half-filled,or generally not filled. Fillings are soft plastic clay and there are apparent ground water activities. The roof of karst cave is thin and large scale,which has the hidden risk of collapse. Reasons of initiation of it are analyzed and countermeasures are suggested.
出处
《土工基础》
2009年第1期68-71,共4页
Soil Engineering and Foundation
关键词
桩基扩孔
塌陷的隐患
降低
系数
reaming of pile foundation
hidden risk for collapse
reduce
coefficient
