铁道科学与工程学报2018，Vol.15Issue(6)：1501-1508,8.
拱形双排隔离桩位置对既有隧道的影响分析
Analysis of influence of position of arch double row isolated pile on existing tunnel
摘要
Abstract
Based on an excavation of building basement in Hangzhou, a three-dimensional model was established by using ABAQUS finite element software. The bored pile of foundation pit supporting structure was transformed into underground continuous wall, and linear Drucker-Prager hardening constitutive model was used to analyze. The displacement of the tunnel and arch double row isolated pile under different positions of isolation piles was studied. The results show that, when the double arch isolation pile located at about 10 m of foundation pit and the curved row pile in tunnel, the tunnel lining displacement reaches the minimum. The arch located at 12 m of foundation pit, the displacement and stress value of isolation piles is minimum. The stress values under different degrees of tunnel lining decrease first and then increase. Pile tail arc displacement is smaller than the straight pile, while curved row pile head displacement is greater than the straight pile. When the isolation pile is near the pit, arched row pile displacement is larger than the straight pile. The contrary is the case when the isolation pile is near the tunnel.关键词
隔离桩/基坑开挖/既有隧道/数值分析/Drucker-Prager硬化模型Key words
isolated pile/excavation/existing tunnel/numerical analysis/Drucker-Prager hardening model分类
建筑与水利引用本文复制引用
徐长节,曾晓鑫,戚晓锴,赵秀绍..拱形双排隔离桩位置对既有隧道的影响分析[J].铁道科学与工程学报,2018,15(6):1501-1508,8.基金项目
国家重点基础研究发展计划(973计划)项目(2015CB057801) （973计划）
国家自然科学基金资助项目(51278449,51238009,51668018) （51278449,51238009,51668018）
江西省岩土工程基础设施安全与控制重点实验室资助项目(20161BCD40002) （20161BCD40002）
