武昌滨江E1核心区基坑及附属环路施工优化研究  

Research on the Optimization of Construction for Foundation Pit andAssociated Ring Road in the CoreArea of Wuhan Binjiang E1

作　　者：郑越涛 杨俊超 张润 刘志威 邓玉萍 陈晨 ZHENG Yue-tao;YANG Jun-chao;ZHANG Run;LIU Zhi-wei;DENG Yu-ping;CHEN Chen(School of Civil Engineering and Architecture,Wuhan University of Technology,Wuhan 430070;Guangzhou Construction Engineering Co.,Ltd.,Guangzhou 510060;China Railway Construction Group Corporation Limited,Beijing 100040;School of Civil Engineering and Architecture,Wuhan Institute of technology,Wuhan 430073)

机构地区：[1]武汉理工大学土木工程与建筑学院,武汉430070 [2]广州市第一市政工程有限公司,广州510060 [3]中铁建设集团有限公司,北京100040 [4]武汉工程大学土木工程与建筑学院,武汉430073

出　　处：《广州建筑》2024年第4期81-86,共6页GUANGZHOU ARCHITECTURE

基　　金：中铁建设集团有限公司科技研究开发项目[20-32c、23-46c];武汉市城建委科技计划项目[201712]。

摘　　要：依托武昌滨江E1核心区基坑及附属环路工程进行施工优化研究,采用数值模拟方法对基坑土方3种不同开挖方案及基坑与环路3种不同施工时序进行了模拟分析。结果表明:顺层式、岛式、盆式3种基坑土体开挖方案中,盆式开挖方案在控制围护结构变形及对周边环境影响方面的效果最好;对于基坑与环路施工时序而言,基坑与环路交替施工方案在减小地表沉降与围护结构变形方面的效果最好;3种施工时序下两坑间土体随施工开挖均呈现先沉降后隆起,受先开挖基坑造成土体下沉的影响,后开挖基坑坑底位移量远小于先开挖基坑,推荐采用基坑环路交替施工时序方案。Through the construction optimization research based on the foundation pit and its attached ring road project in the E1 core area of Wuchang Binjiang,this study conducted a simulation analysis using numerical simulation method for three different excavation schemes of the foundation pit soil and three different construction sequences of the foundation pit and the ring road.The results showed that among the three excavation schemes of layered excavation,island excavation,and basin excavation,the basin excavation scheme had the best effect in controlling the deformation of the retaining structure and the impact on the surrounding environment.As for the construction sequence of the foundation pit and the ring road,the alternating construction scheme between the foundation pit and the ring road had the best effect in reducing surface settlement and retaining structure deformation.Under the three construction sequences,the soil between the two pits showed a pattern of sinking first and then rising due to the influence of the first excavated foundation pit causing the soil to sink,and the displacement of the bottom of the pit excavated later was much smaller than that of the first excavated pit.It is recommended to adopt the alternating construction sequence of the foundation pit and the ring road,which has the best effectin controllingthe deformation of the retaining structure,surface settlement outside the pit and uplift of the pit bottom.

关 键 词：相邻基坑 开挖方案 施工时序 数值模拟 

分 类 号：TU47[建筑科学—结构工程]