基于防排水措施的灰场深厚湿陷性黄土地基处理

Treatment design of thick collapse loess by water preventing and drainage

通过对黄土产生湿陷的内、外因素分析,认为黄土产生湿陷的内因是黄土的结构性,外因是浸水与压力,因此在深厚湿陷性黄土地基处理中,通过一定的防、排水措施可以减弱或消除黄土产生湿陷的外因,从而避免黄土地基浸水湿陷。本文以山西王曲电厂灰场深厚湿陷性黄土地基的防排水处理措施为例,在分析黄土湿陷性机理的基础上,对该灰场深厚湿陷性黄土地基处理的设计思路及设计方案进行了介绍,可为今后相似工程地质条件下的工程设计提供有益的参考和借鉴。

With the development of economy, the thickness of collapse loess encountered in engineering in- creased in recent years. The increasing of water content caused some serious problems to the operation of ash yard, such as the collapse loess foundation subsidece and cracks. This paper analyzes the influencing factors of collapse loess. Results show that there are two necessary factors for the loess to collapse, one is the structure of loess, the other is water infiltration or confining stresses. So water preventing ean protect the loess against collapse. With an actual project, this paper illustrates the treatment design schedule of thick collapse loess, and this provides helpful refercenee to the design of similar project with the same geo- logical condition.