Undrained Stability Analysis of Shallow Tunnel and Sinkhole in Soft Clay: The Cavity Contraction Method
Source abstract
Abstract
This paper presents theoretical methods for the undrained stability analysis of shallow tunnels/sinkholes in clay based on the cavity contraction theory, with some assumptions and simplifications. To examine the accuracy and reliability of the new methods, a database was assembled, which consists of stability numbers of tunnel/sinkholes in clays from 22 centrifuge model tests, 10 field tests, and 62 FELA results. It is shown that the proposed methods give an average of 2.5% overestimation for the stability numbers from model tests and is in a good agreement with the FELA results. The cavity contraction theory-based methods are then discussed, which could provide useful guidance for designers to roughly assess shallow tunnel/sinkhole stability in clays.
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Research context
OpenAlex topics: Geotechnical Engineering and Analysis · Geotechnical Engineering and Underground Structures · Dam Engineering and Safety
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Affiliations
School of Qilu Transportation, Shandong University, Jinan 250002, China
Shandong High-Speed Group Co., Ltd., Engineering Management Department, Jinan 250098, China
Shandong High-Speed Lanlin High-Speed Group Co., Ltd., Linyi 276713, China
Shandong Provincial Communications Planning and Design Institute Co., Ltd., Jinan 250031, China
References (37)
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