深基坑开挖支护和降水方案应用分析

Analysis on the Application of Deep Foundation Pit Excavation Support and Dewatering Scheme

对富含承压水和潜水的深基坑进行开挖往往会造成边坡失稳和坑底突涌,因此,对基坑进行降水支护设计尤为重要。文章以太原市小店区某中学项目为例,详细介绍了在建筑场地内土层有承压水和地表潜水的条件下,开挖深基坑综合应用复合土钉墙支护和双排水泥土搅拌桩止水帷幕对基坑进行加固的具体方案,并对降水井的布置进行了分析,旨在为类似工程提供经验。

Excavation of the deep foundation pit rich in confined water and phreatic water often causes side slope instability and sudden inrush at the bottom of the pit.Therefore,it is particularly important to design dewatering support for foundation pit.Taking a middle school project in Xiaodian District of Taiyuan City as an example,this paper introduces in detail the specific scheme of using composite soil nail wall support and double row cement soil mixing pile water stop curtain to reinforce deep foundation pit under the condition of confined water and surface phreatic water in the soil layer of the construction site,and analyzes the layout of the dewatering well,aiming at providing experience for similar engineering.