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《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

卷:

41卷

期数:

2024年02期

页码:

115-123

栏目:

桥隧工程

出版日期:

2024-03-30

文章信息/Info

Title:

Experimental study on construction mechanical behavior of shallow-buried concealed intersecting tunnel

文章编号:

1673-2049(2024)02-0115-09

作者:

崔凌岳¹,王福文²,孙铁成^3,4

(1. 中铁十八局集团第一工程有限公司,河北 涿州 072750; 2. 北京城建设计发展集团股份有限公司,北京 100037; 3. 石家庄铁道大学 省部共建交通工程结构力学行为与系统安全国家重点实验室,河北 石家庄 050043; 4. 石家庄铁道大学 道路与铁道工程安全保障省部共建教育部重点实验室,河北 石家庄 050043)

Author(s):

CUI Lingyue¹, WANG Fuwen², SUN Tiecheng^3,4

(1.The First Engineering Co.,Ltd. of China Railway 18th Bureau Group Corporation Limited,Zhuozhou 072750,Hebei,China;2.Beijing Urban Construction Design & Development Group Co.,Ltd, Beijing 100037,China;3.State Key Laboratory of Mechanical Behavior and System Safety of Traffic Engineering Structures,Shijiazhuang Tiedao University,Shijiazhuang 050043,Hebei,China;4.Key Laboratory of Roads and Railway Engineering Safety Control,Shijiazhuang Tiedao University,Shijiazhuang 050043,Hebei,China)

关键词:

地下结构;  交叉相贯隧道;  模型试验;  浅埋暗挖;  地表沉降

Keywords:

underground construction;  intersecting tunnel;  model test;  shallow-buried tunneling;  surface subsidence

分类号:

TU921

DOI:

10.19815/j.jace.2022.03013

文献标志码:

A

摘要:

为完善浅埋暗挖交叉相贯隧道在施工过程中的受力形式及变形特征,依托青岛某地铁工程,根据所选地铁车站的地质条件及衬砌结构特点浇筑衬砌模型并配制围岩相似材料,利用模型试验对采用全断面法在Ⅴ级围岩环境下进行的风道和车站主体开挖过程的力学行为展开研究,并从隧道衬砌结构变形及地层内部位移变化规律两方面分析了浅埋暗挖交叉相贯隧道全断面开挖施工的力学行为。结果表明:对于交叉相贯位置处的隧道结构,已有隧道结构将改变后续施工隧道衬砌结构应变最大值及其出现位置; 位于交叉相贯隧道结构附近不同象限内的围岩分别处于水平变形累加区和往复区; 地表竖向变形最大点位于后续施工的车站上方且与交叉相贯位置存在一定距离,而在交叉相贯位置处的地表竖向变形值稍小; 模型试验明确了交叉相贯隧道在施工过程中围岩及衬砌结构的变形特征,给出了隧道结构地表最大变形与施工步序间的时空关系; 研究结果可为相关交叉相贯隧道结构的施工及设计提供依据。

Abstract:

In order to improve the stress form and deformation characteristics of the shallow-buried concealed intersecting tunnel during the construction process, based on a subway project in Qingdao, the lining model was poured according to the geological conditions of the selected subway station and the characteristics of the lining structure, and the similar materials of the surrounding rock were prepared. The model test was used to study the mechanical behavior of the air duct and the main body of the station during the excavation process using the full-section method in the grade-Ⅴ surrounding rock environment. The mechanical behavior of the full-section excavation of the shallow-buried concealed intersecting tunnel was analyzed from two aspects: the deformation of the tunnel lining structure and the internal displacement of the stratum. The results show that for the tunnel structure at the intersecting position, the existing tunnel structure will change the maximum strain and its position of the lining structure of the subsequent construction tunnel. The surrounding rock in different quadrants near the cross-intersecting tunnel structure is in the horizontal deformation accumulation zone and the reciprocating zone respectively. The maximum vertical deformation point of the surface is located above the station of the subsequent construction and has a certain distance from the intersection position, while the vertical deformation value of the surface at the intersection position is slightly smaller. The model test clarifies the deformation characteristics of the surrounding rock and lining structure during the construction of the intersecting tunnel, and gives the temporal and spatial relationship between the maximum surface deformation of the tunnel structure and the construction sequence. The research results can provide a basis for the construction and design of related intersecting tunnel structures.

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相似文献/References:

备注/Memo

备注/Memo:

收稿日期:2023-03-03
基金项目:国家自然科学基金项目(5217083250)
作者简介:崔凌岳(1972-),男,高级工程师,E-mail:2439235409@qq.com。
通信作者:孙铁成(1974-),男,工学博士,教授,博士生导师,E-mail:sjz_sti@stdu.edu.cn。

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更新日期/Last Update: 2024-03-25