Case Study on Tunnel Settlement Calculations during Construction Considering Shield Disturbance

Shield construction in structural soft soils inevitably disturbs the soil around the tunnel leading to tunnel settlement instead of tunnel uplift due to soil unloading rebound during construction. In this paper, tunnel settlement prediction in structural soft soils during construction has been studi...

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Bibliographic Details
Published in:KSCE journal of civil engineering 2023, 27(5), , pp.2202-2216
Main Authors: Sun, Fuxue, Jin, Zhouzhou, Wang, Chaoliang, Gou, Changfei, Li, Xiaochun, Liu, Cheng, Yu, Zheng
Format: Article
Language:English
Subjects:
Civil Engineering
Compression
Construction
Engineering
Engineering research
Geology
Geotechnical Engineering & Applied Earth Sciences
Industrial Pollution Prevention
Permeability
Settlement analysis
Shear tests
Soft soils
Soil
Soil settlement
Soils
Tunnel construction
Tunnel Engineering
Tunneling shields
Tunnels
Unloading
Uplift
토목공학
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Summary:Shield construction in structural soft soils inevitably disturbs the soil around the tunnel leading to tunnel settlement instead of tunnel uplift due to soil unloading rebound during construction. In this paper, tunnel settlement prediction in structural soft soils during construction has been studied by adopting Oujiang Beikou shield tunnel as an example. Firstly, disturbance degree calculation method based on effective stress was introduced and the disturbance degree due to shield construction was numerically simulated. Secondly, combined with one-dimensional consolidation test results, a “two-fold line” settlement calculation model was developed for disturbed soil. Finally, tunnel settlement during construction was predicted through one-way compression layer-summation method and compared with experimentally measured results. Research results demonstrated that the developed method was suitable for the prediction of shield tunnel settlement in structural soft soils.
ISSN:1226-7988
1976-3808
DOI:10.1007/s12205-023-0925-z