承压水地层基坑开挖对基坑与场地的影响分析  

Analysis of influence of foundation pit excavation on the foundation pit and site in confined water area

作　　者：李其隆 LI Qilong(China Railway 21st Bureau Group Rail Transit Engineering Co.,Ltd.,Jinan 250010,China)

机构地区：[1]中铁二十一局集团轨道交通工程有限公司,山东济南250010

出　　处：《四川建材》2025年第3期141-143,154,共4页Sichuan Building Materials

摘　　要：针对济南轨道交通4号线一期工程济南西站深大基坑工程,基于ABAQUS大型商用有限元软件建立场地-地下连续墙-降水井二维数值模型,考虑该工程所处的泉域承压水区域对施工的不利影响,分析深大基坑降水开挖过程中基坑与场地的沉降量,探究基坑开挖对基坑与场地的影响。研究表明,承压水地层基坑开挖对基坑的位移沉降具有直接影响,最后1次基坑开挖基底回弹达到76 mm,需要采取适宜的措施来控制坑底的回弹,但工程中远处场地的沉降量较小并无明显变化。The Jinan West Station of Jinan Rail Transit Line 4 Phase I Project is in typical the spring-confined water area.Based on ABAQUS general finite element software,a two-dimensional numerical model of site-diaphragm wall-dewatering well is established for the deep and large foundation pit.Considering the adverse impact of the confined water area of the spring region where the project is located on the construction,the settlement of the foundation pit and the site during the dewatering excavation of the deep and large foundation pit is analyzed,and the impact of foundation pit excavation on the foundation pit and the site is explored.The results show that the excavation of a foundation pit in a confined water layer has a direct impact on the displacement and settlement of the foundation pit.In the last excavation of the foundation pit,the rebound of the base reached 76 mm,and appropriate measures need to be taken to control the rebound of the pit bottom.However,the settlement of the distant site in the project is relatively small and there is no significant change.

关 键 词：基坑开挖 承压水地层 有限元分析 降水井 

分 类 号：U231[交通运输工程—道路与铁道工程]