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陈 璐,胡 俊,高林,等. 盾尾刷更换时环形冻结加固结构温度场数值分析[J]. 科学技术与工程, 2021, 21(4): 1593-1600.
chenlu,et al.Numerical analysis of temperature field of annular frozen reinforced structure when shield tail brush is replaced[J].Science Technology and Engineering,2021,21(4):1593-1600.
盾尾刷更换时环形冻结加固结构温度场数值分析
Numerical analysis of temperature field of annular frozen reinforced structure when shield tail brush is replaced
投稿时间:2020-04-27  修订日期:2021-01-26
DOI:
中文关键词:  盾尾刷更换  环形冻结  冻结法  温度场  数值模拟
英文关键词::Shield tail brush replacement  annular freezing  freezing method  temperature field  numerical simulation
基金项目:海南省基础与应用基础研究计划(自然科学领域)高层次人才项目(2019RC148、2019RC351);“南海系列”育才计划项目(琼人才办通[2019]21号);中国博士后科学基金资助项目(2018M630722)
                 
作者单位
陈 璐 海南大学 土木建筑工程学院
胡 俊 海南大学 土木建筑工程学院
高林 海南华昌旅游开发有限公司
王志鑫 海南省水文地质工程地质勘察院
曾东灵 海南省水文地质工程地质勘察院
吴雨薇 海南大学 土木建筑工程学院
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中文摘要:
      :盾构法修建城市地铁隧道时,盾尾刷更换过程中的防渗漏问题一直是盾构隧道施工的关注重点。本文针对传统冻结加固保护盾尾刷方法的弊端,提出了使用环形冻结管加固止水保护盾尾刷更换的施工方法,通过有限元软件建模,分析比较布置1根环形冻结管和2根环形冻结管的冻结效果,从而确定出最佳冻结方案。主要得出:布设1-2根环形冻结管方案下数值计算结果均满足冻结加固范围和设计要求;为提高封水性与安全性及增大冻结加固止水范围,延长积极冻结时间不如增加环形冻结管的根数,且适当增加环形冻结管的间距有利于增强冻结效果;增加环形冻结管的根数可极大地提高盾尾处的冻结效果且有很高的安全系数富裕,本文的分析结果可为相关施工工程提供一定的参考价值。
英文摘要:
      :When shield tunnel is built by shield tunneling, the problem of seepage prevention during the replacement of shield tail brush has always been the focus of shield tunnel construction. In this paper, according to the disadvantages of the traditional method of the tail brush of the protection shield strengthened by freezing, the construction method of replacing the tail brush of the protection shield strengthened by the ring freezing pipe was put forward, and the freezing effect of one ring freezing pipe and two ring freezing pipes was analyzed and compared through the finite element software modeling, so as to determine the best freezing scheme. The main results are as follows: when the tail brush of the shield is replaced, the ring freezing reinforcement method can deal with sudden accidents; this construction method makes the replacement process of the tail brush of the shield safe and reliable. The numerical calculation results under the plan of laying 1-2 annular freezing pipes all meet the freezing reinforcement range and design requirements. In order to improve water sealing and safety and increase the freezing area, it is better to increase the number of roots of the ring freezing pipe than to extend the active freezing time. Increasing the number of roots of the annular freezing pipe can greatly improve the freezing effect at the end of the shield and have a high safety coefficient.
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