摘要
结合沈阳北站综合交通枢纽改扩建工程的地下新建工程Ⅱ区基坑工程实例,运用有限差分软件FLAC3D模拟了基坑在4种不同支护方案下开挖过程,对4种开挖过程所引起的基坑坡顶和坡底的位移、坑壁水平方向的位移进行了分析。数值模拟结果表明:坑底隆起是由于垂直方向卸载而引起的,采用混凝土围护桩和预应力锚索联合支护可以有效地控制基坑的变形。研究结果和工程实践证明本工程的支护方案是有效可行的。
Combined with practical underground project ofⅡ area foundation pit of comprehensive traffic hub of Shenyang north station,the paper simulated the process of foundation pit excavation under four different support schemes by using the finite difference software FLAC3D,and analyzed the displacements of slope top and bottom of foundation pit and horizontal displacement of foundation pit wall caused by four types of excavation process. The simulation results show that the bottom uplift is caused by the vertical unloading,the concrete support pile and pre- stressed anchor cable can effectively control the deformation of foundation pit. The research results and engineering practice prove that support scheme of the project is effective and feasible.
出处
《水资源与水工程学报》
2014年第2期24-28,共5页
Journal of Water Resources and Water Engineering
基金
国家自然科学基金项目(51174268)
关键词
基坑
FLAC3D
变形分析
支护结构
foundation pit
FLAC3D
deformation analysis
supporting structure
