Study on Interplay of Overlapping Shield Tunnelling in Sandy Pebble Strata and Its Control Measures

LI Xue; ZHANG Yushen; WANG Yangyang; GUO Qingfei; XIANG Qiao; GONG Zibang

doi:10.13204/j.gyjzG21063015

Volume 52 Issue 3

Jul. 2022

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Article Navigation > INDUSTRIAL CONSTRUCTION > 2022 > 52(3): 10-16

Li Ke, Chen Guoping, Tang Lan. ANALYSIS OF SEISMIC BEHAVIORS OF THE MASONRY-CONCRETE TUBE COMPOSITE STRUCTURE[J]. INDUSTRIAL CONSTRUCTION, 2011, 41(4): 34-37. doi: 10.13204/j.gyjz201104008

Citation:

LI Xue, ZHANG Yushen, WANG Yangyang, GUO Qingfei, XIANG Qiao, GONG Zibang. Study on Interplay of Overlapping Shield Tunnelling in Sandy Pebble Strata and Its Control Measures[J]. INDUSTRIAL CONSTRUCTION, 2022, 52(3): 10-16. doi: 10.13204/j.gyjzG21063015

Li Ke, Chen Guoping, Tang Lan. ANALYSIS OF SEISMIC BEHAVIORS OF THE MASONRY-CONCRETE TUBE COMPOSITE STRUCTURE[J]. INDUSTRIAL CONSTRUCTION, 2011, 41(4): 34-37. doi: 10.13204/j.gyjz201104008

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Study on Interplay of Overlapping Shield Tunnelling in Sandy Pebble Strata and Its Control Measures

doi: 10.13204/j.gyjzG21063015

1. School of Geoscience and Technology, Southwest Petroleum University, Chengdu 610500, China;
2. Chengdu-Guiyang Railway Co., Ltd., Chengdu 610500, China;
3. The 2nd Engineering Co., Ltd., China Railway Construction Bridge Engineering Bureau Group, Shenzhen 518000, China

Received Date: 2021-06-30

Abstract

Abstract

In the tunneling process of overlapping shield tunnels, the construction of post tunnelling tunnels may have a certain influence on tunnels constructed first and cause structure deformation of the tunnels, even affect their safety. Therefore, it was necessary to study the tunnelling process of overlapping tunnels in sandy pebble strata. Based on the tunnel project of Chengdu Metro Line No.6, different tunnelling modes of overlapping shield tunnels in sandy pebble strata were analyzed, and the optimal tunnelling mode was selected from the perspective of subsidence of the earth’s surface. The superposition effect of subsidence caused by tunnelling of overlapping tunnels was analyzed. Grouting reinforcement between overlapping tunnels was performed to improve compressive and shear strength of soil between tunnels and ensure the safety and stability of shield tunnelling. Finally, by comparing the measured data with the numerical simulation results, the errors were all within 5%. The transverse subsidence of the earth’s surface above the tunnel constructed first was approximately U-shaped. Although the subsidence of the tunnel constructed first was still in evolution during the construction of post tunnelling tunnels, the changes tended to be stable and the subsidence was lagging obversely, soil deformation was under control after grouting reinforcement.
- sandy pebble,
- overlapping tunnel,
- control measure,
- field monitoring

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References(24)

References

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