苏州地铁东方之门站配套预留工程基坑设计方案研究

Study on Design Scheme of Foundation Pit for Reserved Project of Suzhou Metro-the Gate of Orient Station

以星港街隧道配套(轨道交通)预留工程东方之门站为工程背景,对拟建场地进行工程地质、水文地质调查分析。对轨道交通1号线车站及区间进行专项保护,结合基坑其他配套预留项目的位置、结构形式及围护形式等,对基坑进行分区设计,采取适宜的支撑体系和结构围护形式。以基坑的安全等级为依据,对基坑变形、稳定性等进行分析,基坑的抗滑移、抗倾覆,基底土体的抗隆起等安全系数均满足规范要求,基坑形式安全合理,可为相似车站配套预留工程的基坑设计提供借鉴。

This paper takes the Gate of Orient Station,a reserved project of Xinggang Street Tunnel(railway)as the engineering background,and conducts engineering geological and hydrogeological investigation and analysis on the proposed site.Special protection is applied to the station and section of Rail Transit Line 1.Combined with other location,structure and form of the reserved items of foundation pits,the foundation pit is designed in sections,and appropriate support systems and structural maintenance forms are adopted.Based on the safety grade of foundation pit,the deformation and stability of foundation pit are analyzed.Based on the analysis of the deformation and stability of the foundation pit,the safety factors such as anti-slip,anti-overturning of the foundation pit and anti-uplift of the foundation soil meet the requirements of the code.The foundation pit form is safe and reasonable,which can provide reference for the foundation pit design of similar station supporting reserved project.