摘要
针对上海市某地铁深基坑,基于FLAC^(30)软件,采用摩尔—库伦弹塑性模型,对既有建筑物旁盖挖逆作法施工的深基坑进行了分步开挖数值模拟;并将计算得到的围护结构水平位移和基坑周围地表沉降与实际监测结果进行对比分析,验证了计算模型和计算参数的合理性,最后分析了基坑开挖对临近建筑物桩基的影响,为基坑工程的设计与施工提供参考。
Aiming at a deep foundation pit of metro in Shanghai, using Molar-Coulomb model, a numerical simulation on excavation by steps of the deep foundation pit besides existing buildings using top-down method is carried out by FLAC^3D. The calculated horizontal displacement of enclosure structure and ground settlement are analyzed. A comparative analysis is made between the calculated results and the measured results, so that rationality of model and parameters can be verified. Finally, the effect of excavation on surrounding buildings is analyzed, which provide reference to design and construction of projects.
出处
《华东交通大学学报》
2009年第4期13-17,共5页
Journal of East China Jiaotong University
基金
国家自然科学基金项目(40772178)
关键词
深基坑
逆作法
数值模拟
实测
位移
deep foundation pit
top-down method
numerical simulation
measurement
displacement
