盾构端头井土体合理加固范围及其应用研究

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• 英文论文题名：Study on Reasonable Reinforcement Scope of the Soil Mass Outside Shield Tunnel End Well and Its Application
• 论文作者：程盼盼 ; 徐前卫 ; 朱合华 ; 李谷阳 ; 李晓亮 ; 龚振宇 ; 唐卓华
• 英文论文作者：CHENG Panpan ; XU Qianwei ; ZHUHehua ; LI Guyang ; LI Xiaoliang ; GONG Zhenyu ; TANG Zhuohua ; Key Laboratory of Road and Traffic Engineering of Ministry of Education ; Tongji University ; Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education ; Tongji University ; Five Iron Group Electric Service City Link Engineering Co.Ltd. ; Jinan Rail Transit Group Limited Corporation
• 年：2016
• 作者机构：同济大学道路与交通工程教育部重点实验室;同济大学岩土与地下工程交通教育部重点试验室;中铁五局电务城通公司;济南轨道交通集团公司;
• 论文关键词：盾构端头井 ; 加固范围 ; 稳定性 ; 滑动面 ; 工程类比法
• 英文论文关键词：End well of shield tunnel ; Reinforcement scope ; Stability ; Sliding surface ; engineering analogy method
• 会议召开时间：2016-10-24
• 会议录名称：2016中国隧道与地下工程大会（CTUC）暨中国土木工程学会隧道及地下工程分会第十九届年会论文集
• 语种：中文
• 分类号：U455.43
• 学会代码：OGTY
• 会议名称：2016中国隧道与地下工程大会（CTUC）暨中国土木工程学会隧道及地下工程分会第十九届年会
• 会议地点：中国四川成都
• 主办单位：中国土木工程学会隧道及地下工程分会
• 学会名称：中国土木工程学会
• 页数：10
• 文件大小：2171k
• 原文格式：O
• 会议级别：全国

摘要

目前盾构端头井土体加固范围的确定方法比较多,主要有工程类比法、解析法和数值模拟法。在对已有的计算方法及工程经验归纳总结的基础上,分析了现有的端头井加固理论模型的局限性,提出了用MATLAB编制搜索程序寻找最危险滑动面法来确定加固长度的新模型,并结合北京地铁8号线天桥~永定门外区间盾构端头井土体加固实例,对不同计算方法进行了比较。计算结果表明,不同于传统加固模型将土体的失稳半径假定为洞门直径,新模型计算得到的土体失稳滑动半径远大于洞门直径,且由新模型确定的加固长度与数值模拟的计算结果具有较好的一致性,可对今后盾构端头井土体合理加固范围的确定具有较好的借鉴和参考价值。
At present,there are many methods for determining the reinforcement scope of soil outside shield tunnel shaft,including engineering analogy method,analytical method and numerical simulation.Based on the summarization of existed theoretic calculation methods as well as engineering experience methods,the limitations of such models are analyzed in this paper.Subsequently,by means of the MATLAB program,a new method is proposed to search for the most dangerous sliding surface so as to determine the reasonable reinforcement length.Furthermore,this method is applied to the practice of soil reinforcement of the interval tunnel from Tianqiao station to Yongdingmen station of Beijing Metro Line 8,and the result is compared with that of other traditional methods.Based on the analysis on calculation results,the sliding radius of soil mass calculated by the new method is much larger than the diameter of the tunnel portal,which is quite different from the widely accepted postulation considering the sliding radius equal to the diameter of the tunnel portal.In addition,the reinforcement scope determined by the new method is in good agreement with the numerical simulation results.Such findings have relatively good reference and guidance for determining the reasonable soil reinforcement scope outside the shield tunnel end well in the future.

引文

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