Study on Techniques for Crossing Under Main Lines of Long-Span and Flat Tunnels by the Superly Long Pipe-Shed Method

YAO Zhixiong; ZHOU Qichuang; HUANG Min; LUO Zhiyi; FAN Lanxin

doi:10.13204/j.gyjzG21081712

Volume 52 Issue 3

Jul. 2022

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Article Navigation > INDUSTRIAL CONSTRUCTION > 2022 > 52(3): 60-66,84

YAO Zhixiong, ZHOU Qichuang, HUANG Min, LUO Zhiyi, FAN Lanxin. Study on Techniques for Crossing Under Main Lines of Long-Span and Flat Tunnels by the Superly Long Pipe-Shed Method[J]. INDUSTRIAL CONSTRUCTION, 2022, 52(3): 60-66,84. doi: 10.13204/j.gyjzG21081712

Citation:

YAO Zhixiong, ZHOU Qichuang, HUANG Min, LUO Zhiyi, FAN Lanxin. Study on Techniques for Crossing Under Main Lines of Long-Span and Flat Tunnels by the Superly Long Pipe-Shed Method[J]. INDUSTRIAL CONSTRUCTION, 2022, 52(3): 60-66,84. doi: 10.13204/j.gyjzG21081712

Citation:

YAO Zhixiong, ZHOU Qichuang, HUANG Min, LUO Zhiyi, FAN Lanxin. Study on Techniques for Crossing Under Main Lines of Long-Span and Flat Tunnels by the Superly Long Pipe-Shed Method[J]. INDUSTRIAL CONSTRUCTION, 2022, 52(3): 60-66,84. doi: 10.13204/j.gyjzG21081712

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Study on Techniques for Crossing Under Main Lines of Long-Span and Flat Tunnels by the Superly Long Pipe-Shed Method

doi: 10.13204/j.gyjzG21081712

1. Department of Civil Engineering,Fujian University of Technology, Fuzhou 350118, China;
2. Key Laboratory of Underground Engineering, Fujian Province University, Fuzhou 350118, China;
3. Fujian Provincial Key Laboratory of Advanced Technology and Informatization in Civil Engineering, Fuzhou 350118, China;
4. Fujian Railway Construction Co., Ltd., China Railway 24th Bureau Group Co., Ltd., Fuzhou 351111, China

Received Date: 2021-08-17

Abstract

Abstract

The stability of underground structures and the deformation control of surrounding environments are key and difficult subjects in shallow tunnels crossing below important infrastructures,and the pipe-shed method is an important technical measure, which can improve the stability for the environment of rock and soil. Combined with an engineering practice of a long-span, flat and superly shallow tunnel in Fujian Province, which was used the superly long pipe-shed method to cross below main lines, the working principles of the pipe-shed system were analyzed, and the construction methods and crucially technical points of superly long pipe-sheds in ultra shallow tunnels were summarized and put forward. Based on the Winkler elastic foundation beam theory,considering the construction process of three-step tunnelling to reserve core soil,the laws for subsidence of the earth’s surface and the internal force distribution characteristics of the tunnel support structure were analyzed to guide the setting of support parameters and support measures on site. Based on the measured results, the rationality of the calculation results and support measures were vindicated. Combined with the construction process and environmental characteristics, the principle of the subsidence was discussed in detail. Finally,based on the measured subsidence,the subsidence characteristics and influencing factors caused by superly long pipe-shed construction were analyzed systematically. According to the actual engineering characteristics,the control measures of rail deformation were proposed,and the subsidence control methods were proposed from key points of construction techniques.
- long-span and flat tunnel,
- superly long pipe-shed,
- three step tunnelling to reserve core soil,
- subsidence,
- track deformation,
- control measure

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References

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