公路长隧道与横通道空间斜交结构施工力学研究

›› 2007, Vol. 28 ›› Issue (2): 247-252.

公路长隧道与横通道空间斜交结构施工力学研究

张志强^{1, 2}，许江²，万晓燕³

1. 西南交通大学土木工程学院，成都 610031；2. 重庆大学西南资源开发及环境灾害控制工程教育部重点实验室，重庆 400044； 3. 中铁西南科学研究院，成都 610031

收稿日期:2005-10-31 出版日期:2007-02-10 发布日期:2013-08-28
作者简介:张志强，男，1968年生，博士后，教授，主要从事隧道工程和岩土工程方面的研究与教学工作

Study on tunnel construction mechanics at intersection of horizontal adit and major tunnel in highway

ZHANG Zhi-qiang^1,2, XU Jiang², WAN Xiao-yan³

1. School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031 China; 2. Educational Ministry Key Laboratory of Southwest Resources Development and Environmental Disaster Control Engineering, Chongqing University Chongqing 400044, China; 3. Southwest Research Institute of China Railway Engineering, Chengdu 610031, China

Received:2005-10-31 Online:2007-02-10 Published:2013-08-28

摘要/Abstract

摘要： 针对高速公路主隧道与车行横通道组成空间交叉结构，采用现场实测以及三维有限元数值模拟研究手段，进行了结构施工力学研究。结果表明，因横通道施工导致主隧道与横通道交叉部结构，特别是与横通道连接一侧结构处于十分不利的受力状况和变形特征，因此需要采取加固措施，以确保主隧道与横通道交叉部结构的安全。与无横通道情况相比，由于拱形支撑作用被切断，结构受力已不再是单一轴向受力，而产生了部分弯曲受力的复杂受力状况。归纳来看，交叉角越小，围岩应力集中程度越高，从设计角度考虑，交叉角应尽量大一些。研究结论对长大公路隧道设计、施工横通道，有一定参考价值。

关键词: 长大隧道, 横通道施工, 交叉角, 拱形支撑, 应力集中

Abstract: The mechanical behaviour of intersection of horizontal adit and main tunnel in Wanxian to Liangping expressway in Southwest China is studied by using 3D finite element numerical simulation method and in-situ test. Due to adit construction, the research demonstrates the disadvantageous distribution of deformation and internal forces in intersection of adit and main tunnel, particularly in its side-wall connected to the adit. Comparing with the case of no adit, because of arch tunnel set being broken; the intersection structure is subjected to combination of complicated stresses including transverse stress, but not the axial stress. Therefore, it is necessary to take some reasonable reinforcement measures to guarantee safety of the intersection of adit and main tunnel. Furthermore, the intersection angle is more small, the stress concentration of intersection is more high. For example, while intersection angle is 60 degree, the maximum coefficient of stress concentration is up to 1.95; but while intersection angle is 90 degree, the maximum coefficient of stress concentration is about 1.5. The results are helpful for designing and construction of intersection of main tunnel and adit in major highway tunnel.

Key words: major tunnel, adit construction, intersection angle, arch tunnel set, stress concentration

中图分类号:

TU 454

张志强，许江，万晓燕 . 公路长隧道与横通道空间斜交结构施工力学研究[J]. , 2007, 28(2): 247-252.

ZHANG Zhi-qiang , XU Jiang , WAN Xiao-yan . Study on tunnel construction mechanics at intersection of horizontal adit and major tunnel in highway[J]. , 2007, 28(2): 247-252.

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