隧道穿越节理岩体的数值分析

IF 1.2 4区 地球科学 Q3 GEOSCIENCES, MULTIDISCIPLINARY
Harshal Verma, Arunava Ray, Rajesh Rai, Bappaditya Manna, T. N. Singh
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引用次数: 0

摘要

随着发展速度的加快,近年来对隧道的需求也在增加。分析断裂岩体中隧道的稳定性是一项极具挑战性的繁琐工作。隧道稳定性取决于岩石强度、连接螺栓强度、原位应力及其方向。本文的重点是在断裂/节理岩体中建造隧道。本文使用了三种不同的软件,即 Rocscience Phase2(基于有限元)、FLAC3D(基于有限体积)和 PFC3D(基于独特元素),来分析静态和动态加载条件下的性能和稳定性。用于分析的土工材料属性来自实验室测试后获得的数据,并以现有文献为基础。使用第 2 阶段分析了连接方向和螺栓长度的影响,并假设了平应变条件。使用 FLAC3D 比较了地震的影响以及地震荷载条件下全灌浆螺栓、能量吸收螺栓和变形控制螺栓的性能。同时,使用 PFC3D 对几何形状进行了三维独特元素分析,以评估接头及其方向的影响。此外,还对不同类型螺栓的性能进行了数值分析。使用 "fish "功能可以定制螺栓的性能。结果表明,分析必须结合各种数值模拟技术,如有限元、有限体积和基于不同元素的方法,才能获得更可靠的结果。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Numerical Analysis of a Tunnel Passing through Jointed Rockmass

With the increase in the pace of development, the demand for tunnels has increased in recent years. Analysing the stability of a tunnel in a fractured rock mass is a very challenging and cumbersome activity. The tunnel stability depends on the strength of the rock, joints bolt strength, in-situ stresses, and their orientation. This paper focuses on constructing tunnels in fractured/jointed rock mass. Three different software namely Rocscience Phase2 (finite element based), FLAC3D (finite volume based) and PFC3D (distinct element based), were used to analyse the performance and stability under static and dynamic loading conditions. The geomaterial properties used for the analysis were taken from data obtained after laboratory testing and based on available literature. The effect of joint orientation and bolt length was analysed using Phase 2 assuming plain strain conditions. The effect of earthquake and performance of fully grouted, energy absorbing and deformation-controlled bolts under seismic loading conditions were compared using FLAC3D. While the 3D distinct element analysis of geometry was performed using PFC3D to evaluate the effect of joints and their orientation. The performance of the different types of bolts was also analysed numerically. The behaviour of bolts can be customised using the ‘fish‘function. The results indicate that analysis must incorporate the fusion of various numerical simulation techniques like finite element-, finite volume- and distinct element-based methods for more reliable results.

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来源期刊
Journal of the Geological Society of India
Journal of the Geological Society of India 地学-地球科学综合
CiteScore
2.20
自引率
7.70%
发文量
233
审稿时长
6 months
期刊介绍: The Journal aims to promote the cause of advanced study and research in all branches of geology connected with India, and to disseminate the findings of geological research in India through the publication.
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