Numerical analysis of tunnel reinforcing influences on failure process of surrounding rock under explosive stress waves

被引：0
|
作者：
左宇军 [1 ]
唐春安 [2 ]
朱万成 [3 ]
李地元 [4 ]
李术才 [5 ]
机构：
[1] Research Center for Numerical Test of Material Failure, Dalian University
[2] School of Civil and Hydraulic Engineering, Dalian University of Technology,Dalian 116024, China
[3] Center for Rock Instability and Seismicity Research, Northeastern University,Shenyang 110004, China
[4] School of Resources and Safety Engineering, Central South University,Changsha 410083, China
[5] Geotechnical and Structural Engineering Research Center, Shandong University,Jinan 250061, China
来源：
JournalofCentralSouthUniversityofTechnology | 2008年 / 05期
基金：
中国国家自然科学基金;
关键词：
tunnel reinforcing; numerical simulation; explosive stress wave; failure process; inhomogeneity;
D O I：
暂无
中图分类号：
U451.2 [];
学科分类号：
0814 ; 081406 ;
摘要：
Based on mesoscopic damage mechanics, numerical code RFPA2D (dynamic edition) was developed to analyze the influence of tunnel reinforcing on failure process of surrounding rock under explosive stress waves. The results show that the propagation phenomenon of stress wave in the surrounding rock of tunnel and the failure process of surrounding rock under explosive stress waves are reproduced realistically by using numerical code RFPA2D; from the failure process of surrounding rock, the place at which surrounding rock fractures is transferred because of tunnel reinforcing, and the rockfall and collapse caused by failure of surrounding rock are restrained by tunnel reinforcing; furthermore, the absolute values of peak values of major principal stress, and the minimal principal stress and shear stress at center point of tunnel roof are reduced because of tunnel reinforcing, and the displacement at center point of tunnel roof is reduced as well, consequently the stability of tunnel increases.
引用
收藏
页码：632 / 638
页数：7
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