Ground settlement and tunnel response due to twin-curved shield tunnelling in soft ground with small clear distance

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外文摘要：Twin curved tunnels are often encountered in shield tunnelling,where significant complexities in densely exploited underground space are observed.In this study,the ground settlement and tunnel deformation due to twin-curved shield tunnelling in soft ground were investigated using numerical simulation and field monitoring.Different curvature radii of twin curved tunnels and subsequent effects of tunnel construction were considered to reveal the tunnelling effect on ground surface settlement and tunnel deformation.The results show that the settlement trough yields one offset towards inside of curved shield tunnelling.The location of settlement trough and maximum settlement were affected by curvature radius but except for the shape and width of settlement trough.Adjacent parallel twin-curved shield tunnelling could increase the offset of existing settlement trough and maximum settlement.Then,an empirical prediction of surface settlement trough due to twin-curved shield tunnelling with same tunnel diameters in soft clay was proposed,which was applicable to curvature radius less than 800 m.Finally,a minimum radius of 600 m of curvature tunnel was proposed in terms of allowable convergence deformation of tunnel.The result could provide guidance on safety evaluation for twin curved shield tunnelling construction.

外文关键词：

Shield tunnellingCurvature radiusGround settlementTunnel deformationNumerical simulation

作者：

Yao Hu、Haoran Tang、Yinggang Xu、Huayang Lei、Peng Zeng、Kai Yao、Yabo Dong

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作者单位：

State Key Laboratory of Geohazard Prevention and Geoenvironment Protection,Chengdu University of Technology,Chengdu,610059,China

Research Center of Tunneling and Underground Engineering of Ministry of Education,Beijing Jiaotong University,Beijing,100044,China

College of Environment and Civil Engineering,Chengdu University of Technology,Chengdu,610059,China

School of Civil Engineering,Tianjin University,Tianjin,300350,China

School of Qilu Transportation,Shandong University,Jinan,250002,China

Power China Sinohydro Bureau 7 Co.,Ltd.,Chengdu,610213,China

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基金：

National Natural Science Foundation of ChinaSichuan Natural Science FoundationOpen Project of the Research Center of Tunnelling and Underground Engineering of Ministry of Education

项目编号：

423072602023NSFSC0882TUC2022-03

出版年：

2024

DOI：

10.1016/j.jrmge.2024.06.005

岩石力学与岩土工程学报(英文版)

中国科学院武汉岩土力学所中国岩石力学与工程学会武汉大学

岩石力学与岩土工程学报(英文版)

CSTPCD

影响因子：0.404

ISSN：1674-7755

年,卷(期)：2024.16(8)