首页|Limit analysis of uplift failure mechanisms for a high-pressure gas storage tunnel in layered Hoek-Brown rock masses
Limit analysis of uplift failure mechanisms for a high-pressure gas storage tunnel in layered Hoek-Brown rock masses
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NSTL
Elsevier
? 2022The potential uplift failure of rock masses above a high-pressure gas storage tunnel is a serious concern for engineering designers, particularly when the burial depth of the tunnel is relatively small. To predict the uplift failure in such tunnels, two curved failure mechanisms for a single rock layer and multiple rock layers are proposed respectively in this paper. In the mechanisms, the influences of the ground load and arbitrary tunnel profiles are incorporated. Then the analytical solutions of the critical uplift pressure and the corresponding failure surfaces are derived on the basis of the upper bound theorem and variational principle. Further, the numerical simulation technique is utilized to validate the proposed method. An elliptical storage tunnel in two-layer rock strata is selected as a specific example for parametric investigation. The change laws of the critical gas pressure and uplift failure range corresponding to varying parameters are obtained. These results may practically provide theoretical references for the design and construction of gas storage tunnels in layered rock strata.
Gas storage tunnelHoek-Brown rock massLayered strataUplift failure mechanismUpper bound limit analysis
Wang H.-T.、Zhang X.、Liu P.、Li S.-C.、Li X.-J.
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School of Civil Engineering Shandong Jianzhu University
The Key Laboratory of Geotechnical and Structural Engineering Safety of Hubei Province School of Civil Engineering Wuhan University
Research Center of Geotechnical and Structural Engineering Shandong University
NSTL
Elsevier
