摘要
以港珠澳大桥珠海连接线工程为背景,针对明挖隧道滨海沉积区地层压缩性大、地下水位高的特点,考虑围护结构与土体接触效应,采用三维有限元的方法,分析了基坑坑底旋喷加固体不同空间布置形式和范围对围护结构和周边土层的影响,并对坑底工程群桩不同工况进行对比分析。
Based on the Hongkong-Zhuhai-Macao Bridge project, which is a tunnel openly excavated in the littoral de- posit area where the soil layer has large compressibility and high water level, and considering the contact effect between the retaining structure and soil, a 3D elastoplastic numerical simulation model of the tunnel is established in this paper to analyze the influence of the different scope and spatial arrangement of jet grouting reinforcement mass in the bottom of deep foundation pit upon the retaining structure and surrounding soil. Subsequently, the impacts of the engineering pile group in the bottom of deep foundation pit under different working conditions are compared and analyzed.
出处
《水利与建筑工程学报》
2013年第2期46-51,共6页
Journal of Water Resources and Architectural Engineering
基金
国家重点基础研究发展计划(973)资助项目(2011CB013504)
浙江省重大科技计划重点项目(2009C33049)
江苏省2011年度研究生培养科技创新计划项目(CXZZ11-0428)
关键词
深基坑
裙边抽条加固
工程裙桩
变形控制
接触模型
deep foundation pit
skirt border strip reinforcement
engineering pile group
deformation control
contact model
