深井与轻型井点降水在黄河砂卵地层基坑中的应用  

Application of Deep Well and Light Well Point Dewatering in Foundation Pit of Yellow River Sand and Egg Stratum

作　　者：曹辉 丛培 贺冠青 CAO Hui;CONG Pei;HE Guanqing(The First Engineering Co.Ltd.of China Railway Wuju Group,Changsha Hunan 410117)

机构地区：[1]中铁五局集团第一工程有限责任公司,湖南长沙410117

出　　处：《河南科技》2020年第31期121-123,共3页Henan Science and Technology

摘　　要：乌玛高速A7标段位于宁夏中卫黄河桥段,地下水丰富,地层为砂卵层,自稳能力差。当深基坑降水范围超过6 m时,采用一级轻型井点降水或单一的深井降水效果不佳。为保证承台基坑开挖安全及施工方便,本文综合考虑深井与轻型井点降水相结合的方法在黄河砂卵地层基坑开挖施工中的应用。The A7 section of Wuma Expressway is located in the Yellow River Bridge section of Zhongwei,Ningxia.The underground water is rich and the stratum is sand and egg layer,so the self stability ability is poor.When the dewatering range of the deep foundation pit is more than 6 m,the effect of the first-class light well point dewatering or single deep well dewatering is not good.In order to ensure the foundation pit excavation safety and construction convenience,this paper comprehensively considered the application of deep well and light well point dewatering method in the Yellow River sand gravel stratum foundation pit excavation construction.

关 键 词：深基坑降水 放坡开挖 深井井点 轻型井点 

分 类 号：TU753[建筑科学—建筑技术科学]