联络通道施工盾构机接收对已建盾构隧道影响试验研究

黄大维; 陈后宏; 徐长节; 封坤; 耿大新

doi:10.11779/CJGE20221455

联络通道施工盾构机接收对已建盾构隧道影响试验研究 English Version

黄大维^{1, 2,},
陈后宏^{1, 2},
徐长节^{1, 2, ,},
封坤³,
耿大新^{1, 2}

1.
华东交通大学轨道交通基础设施性能监测与保障国家重点实验室, 江西南昌 330013
2.
华东交通大学江西省防灾减灾及应急管理重点实验室, 江西南昌 330013
3.
西南交通大学交通隧道工程教育部重点实验室, 四川成都 610031

基金项目:

国家自然科学基金项目 52078213

国家自然科学基金项目 52378398

国家自然科学基金项目 52238009

江西省主要学科学术和技术带头人领军人才项目 20232BCJ22009

详细信息

作者简介:
黄大维(1984—)，男，博士，副教授，主要从事地下铁道与岩土工程相关的研究与教学工作。E-mail: gddthdw@126.com

通讯作者:
徐长节, E-mail: xucj@zju.edu.cn

中图分类号: TU45
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- 文章访问数: 362
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- PDF下载量: 95
出版历程
- 收稿日期: 2022-11-22
- 网络出版日期: 2024-04-09
- 刊出日期: 2024-03-31

Experimental study on influences of shield machine reception on existing shield tunnels during construction of connecting channels

HUANG Dawei^{1, 2,},
CHEN Houhong^{1, 2},
XU Changjie^{1, 2, ,},
FENG Kun³,
GENG Daxin^{1, 2}

1.
State Key Laboratory of Performance Monitoring and Protecting of Rail Transit Infrastructure, East China Jiaotong University, Nanchang 330013, China
2.
Jiangxi Key Laboratory of Disaster Prevention-Mitigation and Emergency Management, East China Jiaotong University, Nanchang 330013, China
3.
Key Laboratory of Transportation Tunnel Engineering of Ministry of Education, Southwest Jiaotong University, Chengdu 610031, China

摘要

摘要: 联络通道机械法施工中盾构机接收对已建盾构隧道受荷变形影响机制暂不明确问题，通过设计1∶10的缩尺模型试验，开展了联络通道机械法施工中盾构机接收对已建盾构隧道影响试验研究。试验结果分析表明：联络通道机械法施工时，盾构机开挖面附加水平土压力将导致接收端已建盾构隧道对侧的土压力在中部有显著的增大，而两端则减小，即导致顶推对侧发生了水平被动土拱现象；在中间附加水平土压力作用下，隧道在中间发生了显著的竖椭圆变形，而在两端则发生了一定的横椭圆变形；隧道中间发生竖椭圆变形对上下地层形成挤压，在竖向上同样形成了被动土拱现象；隧道纵向挠曲变形时出现了一定的反弯现象。盾构隧道作为地层中的管状结构物，在地层中纵向变形分析时需要考虑横断面变形的影响。
- 联络通道 /
- 盾构隧道 /
- 机械法施工 /
- 附加土压力 /
- 挠曲变形
Abstract: The influence mechanism of shield machine reception on the deformation of the existing shield tunnels under loads during the mechanical construction of connecting channels is not clear. By designing the scale model tests of 1∶10, the influences of shield machine reception on the built shield tunnels during the mechanical construction of connecting channels are investigated. The analysis of the test results shows that during the mechanical construction of connecting channels, the additional horizontal earth pressures on the excavation face of the shield machine cause the earth pressures on the opposite side of the built shield tunnels at the receiving end to increase significantly in the middle, while decreasing at both sides. That is to say, the horizontal passive soil arching occurs at the opposite side of the jacking. Under the action of the additional horizontal earth pressures in the middle, the tunnel has a significant vertical elliptical deformation in the middle. At both sides, a certain transverse elliptical deformation occurs. The vertical elliptical deformation in the middle of the tunnel compresses the upper and lower strata, and also forms the passive soil arching phenomenon vertically. A certain reverse bending phenomenon occurs during the longitudinal deflection of the tunnel. As a tubular structure in the strata, the shield tunnel needs to consider the influences of the cross-section deformation when analyzing the longitudinal deformation in the strata.
- connecting channel /
- shield tunnel /
- mechanical construction /
- additional earth pressure /
- flexural deformation

HTML全文

图 1 模型管片环强度测试

Figure 1. Strength tests on model segment ring

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图 2 管片环对压试验的变形位移

Figure 2. Deformations and displacements of counter pressure tests on segment ring

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图 3 圆环在集中力作用下的变形分析

Figure 3. Deformation analysis of ring under concentrated force

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图 4 模型管片环连接

Figure 4. Connection of model segment ring

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图 5 模型隧道刚度测试示意图

Figure 5. Schematic diagram of stiffness tests on model tunnel

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图 6 模型隧道刚度测试

Figure 6. Stiffness tests on model tunnel

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图 7 实测与反算得到的竖向位移

Figure 7. Vertical displacements obtained from actual measurement and back calculation

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图 8 接收端顶推模拟装置

Figure 8. Receiver push-back simulation devices

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图 9 隧道周围土压力盒与位移计布设示意图

Figure 9. Layout of earth pressure cells and displacement meters around tunnel

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图 10 隧道底部土压力盒

Figure 10. Earth pressure cells at tunnel bottom

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图 11 模型试验相关测量装置

Figure 11. Measuring devices for model tests

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图 12 顶推方向土压力变化

Figure 12. Change of earth pressure in thrusting direction

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图 13 隧道四周土压力变化

Figure 13. Change of earth pressure around tunnel

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图 14 竖向被动土拱导致土压力分布不均

Figure 14. Uneven distribution of earth pressure induced by vertical passive soil arching

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图 15 隧道横断面变形

Figure 15. Deformations of cross section of tunnel

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图 16 隧道纵向挠曲变形

Figure 16. Longitudinal deflection deformations of tunnel

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