摘要
绍兴市柯桥区杭绍城际铁路的两座相邻车站的地质条件为深厚软土地层,采用现浇钢筋混凝土框架结构,主体围护结构为0.8m厚地下连续墙+内支撑支护.据监测数据分析,两基坑的变形规律相似:基坑开挖会使得围护墙顶上抬;围护墙顶水平位移变形均指向基坑内部;基坑开挖引起的地表沉降和周边建筑物沉降的变化曲线一致,随着基坑底板的浇筑完成,地表及建筑物沉降趋于收敛;围护墙体深层水平位移的变形呈现“弓”形;支撑安装时轴力逐渐增大,且第三道砼支撑受力最大.基坑变形规律对深厚软土地区的工程施工具有重要的参考价值.
Given the deep soft soil layer of the two adjacent stations of the Hang-Shao inter-city railway in Keqiao district of Shaoxing city,the cast-in-situ reinforced concrete frame structure was adopted,with the main enclosure structure being 0.8 m thick underground diaphragm wall and internal support.The analysis of monitoring data show that the deformation rules of the two foundation pits are similar:the retaining structure of the foundation pit rises in the early stage.With the increase of foundation pit excavation depth,the settlement of surrounding ground and buildings increases.With the completion of foundation pit floor,the ground and building settlement tend to converge.The horizontal displacement of the deep layer of the enclosure wall is of a“bow”shape.The axial force of steel supports is large during the initial installation.The deformation law of foundation pit is of important reference to the engineering construction in deep soft soil area.
作者
王天佐
李全文
薛飞
陈雷
邱淑豪
WANG Tianzuo;LI Quanwen;XUE Fei;CHEN Lei;QIU Shuhao(School of Civil Engineering,Shaoxing University,Shaoxing,Zhejiang 312000;Key Laboratory of Rock Mechanics andGeohazards of Zhejiang Province,Shaoxing,Zhejiang 312000;Zhejiang Collaborative Innovation Center for Prevention and Control of Mountain Geologic Hazards,Shaoxing,Zhejiang 312000)
出处
《绍兴文理学院学报》
2020年第8期9-19,共11页
Journal of Shaoxing University
基金
绍兴市公益性技术应用研究计划项目“绍兴地区地铁隧道施工对周边建筑物的影响及控制研究”(2017B70065)
绍兴市公益性技术应用研究计划项目“高风险岩溶隧道不良地质预报方法及综合处置技术研究”(2017B70002).
关键词
深厚软土
基坑监测
水平位移
建筑物沉降
deep soft soil
foundation pit monitoring
horizontal displacement
building settlement
