用拟动力法和运动学方法求解三维巷道开挖面崩塌压力和永久位移的上界

IF 2.5 3区 工程技术 Q2 ENGINEERING, CIVIL Geomechanics and Engineering Pub Date : 2021-01-01 DOI:10.12989/GAE.2021.25.6.521
Biao Zhang, Jinquan Jiang, Dao-bing Zhang, Ze Liu
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引用次数: 3

摘要

本文介绍了三维(3D)条件下隧道面地震稳定性分析。为了考虑地震力的时空特征,采用了拟动力方法并将其纳入“角状”机制中。根据极限分析方法和Hoek-Brown强度准则,导出了巷道工作面崩塌压力的解析解。然后采用纽马克法计算巷道工作面永久位移。分析了地震力参数和Hoek-Brown强度准则对巷道工作面崩塌压力和破坏范围的影响。讨论了Hoek-Brown强度准则参数、支撑力与屈服加速度之间的关系。研究了地震作用下隧道顶板、中心和底部的永久位移。本文提出了一种新的隧道工作面地震稳定性分析思路。
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Upper bound solution of collapse pressure and permanent displacement of 3D tunnel faces using the pseudo-dynamic method and the kinematic approach
This work presents seismic stability analysis of tunnel faces under three-dimensional (3D) conditions. To consider the temporal and spatial features of seismic force, the pseudo-dynamic approach was employed and incorporated into the 'horn-like' mechanism. According to the limit analysis method and the Hoek-Brown strength criterion, analytical solution of collapse pressure on tunnel faces was derived. The permanent displacement of tunnel face was then calculated by virtue of the Newmark method. The effects of the parameters of seismic force and Hoek-Brown strength criterion on collapse pressure and failure range of tunnel faces were analyzed. The relationship between the Hoek-Brown strength criterion parameters, the supporting force, and the yield acceleration was discussed. Moreover, the permanent displacements at the top, center, and bottom of tunnel faces under seismic effect were examined. This paper proposes a new idea for seismic stability analysis of tunnel faces.
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来源期刊
Geomechanics and Engineering
Geomechanics and Engineering ENGINEERING, CIVIL-ENGINEERING, GEOLOGICAL
CiteScore
5.20
自引率
25.00%
发文量
0
审稿时长
>12 weeks
期刊介绍: The Geomechanics and Engineering aims at opening an easy access to the valuable source of information and providing an excellent publication channel for the global community of researchers in the geomechanics and its applications. Typical subjects covered by the journal include: - Analytical, computational, and experimental multiscale and interaction mechanics- Computational and Theoretical Geomechnics- Foundations- Tunneling- Earth Structures- Site Characterization- Soil-Structure Interactions
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