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[1]王兵.新建草莓沟2号隧道近接下穿既有隧道施工安全影响分析*[J].中国安全生产科学技术,2021,17(5):106-111.[doi:10.11731/j.issn.1673-193x.2021.05.016]
　WANG Bing.Analysis on construction safety influence of newly-built Caomeigou No.2 tunnel close undercrossing existing tunnel[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2021,17(5):106-111.[doi:10.11731/j.issn.1673-193x.2021.05.016]
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新建草莓沟2号隧道近接下穿既有隧道施工安全影响分析*
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《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
17
期数:
2021年5期
页码:
106-111
栏目:
职业安全卫生管理与技术
出版日期:
2021-05-31

文章信息/Info

Title:
Analysis on construction safety influence of newly-built Caomeigou No.2 tunnel close undercrossing existing tunnel
文章编号:
1673-193X(2021)-05-0106-06
作者:
王兵
（中铁十六局集团地铁工程有限公司，北京100023）
Author(s):
WANG Bing
(Subway Engineering Co.,Ltd.,China Railway 16th Bureau Group Co.,Ltd.,Beijing 100023,China)
关键词:
隧道工程; 近接下穿; 施工安全; Peck公式; 结构变形
Keywords:
tunnel engineering;  close undercrossing;  construction safety;  Peck formula;  structure deformation
分类号:
X951
DOI:
10.11731/j.issn.1673-193x.2021.05.016
文献标志码:
A
摘要:
为探明新建草莓沟2号隧道近接下穿施工对既有盘道岭隧道整体结构的安全影响，基于Peck公式和温克尔弹性地基梁理论建立数值模型，对既有隧道受下穿施工影响的变形沉降和应力增量变化进行研究。结果表明：既有隧道结构在下穿隧道施工的影响下产生竖向和横向位移，且横向位移变形较竖向更为明显，结构的最大沉降量为1.33 mm，远小于沉降控制阈值6.35 mm；下穿隧道施工过程中既有隧道中断面衬砌存在纵向拉应力增量与横向压应力增量，最大的拉应力增量为0.86 MPa，远小于拉应力控制阈值1 MPa；最大的压应力增量为0.5 MPa，远小于控制阈值5 MPa；结构沉降变形和应力增量均小于工程的控制标准，上部既有盘道岭隧道结构安全稳定。所用研究方法和技术方案可为近接下穿隧道的安全施工提供借鉴。
Abstract:
In order to determine the influence of the close undercrossing construction of Caomeigou No.2 tunnel on the overall structure of existing Pandaoling tunnel,a numerical model based on the Peck formula and Winkler elastic foundation beam theory was established,and the deformation settlement and stress increment change of the existing tunnel affected by undercrossing construction were analyzed.The results showed that under the influence of undercrossing tunnel construction,the structure of existing tunnel generated the vertical and transverse displacement,and the transverse displacement deformation was more obvious than the vertical displacement deformation.The maximum settlement of the structure was 1.33 mm,which was far less than the settlement control threshold of 6.35 mm.During the process of undercrossing tunnel construction,the middle section lining of existing tunnel had the longitudinal tensile stress increment and transverse compressive stress increment.The maximum tensile stress increment was 0.68 Mpa,which was far less than the tensile stress control threshold of 1 MPa,and the maximum compressive stress increment was 0.5 MPa,which was far less than the control threshold of 5 MPa.Both the structural settlement deformation and stress increment were less than the control standards of engineering,and the structure of upper existing Pandaoling tunnel was safe and stable.The research results can provide reference for the safe construction of the close undercrossing tunnels.

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备注/Memo

备注/Memo:
收稿日期： 2020-11-02
* 基金项目： 国家自然科学基金项目（51408008）
作者简介： 王兵，硕士，高级工程师，主要研究方向为地铁施工管理。
更新日期/Last Update: 2021-06-03