Interaction between two neighboring tunnel using PFC2D

被引：6

作者：

Sarfarazi, V. ^{[1
]}

Haeri, Hadi ^{[2
]}

Safavi, Salman ^{[2
]}

Marji, Mohammad Fatehi ^{[3
]}

Zhu, Zheming ^{[4
]}

机构：

[1] Hamedan Univ Technol, Dept Min Engn, Hamadan, Iran

[2] Islamic Azad Univ, Malard Branch, Dept Civil Engn, Malard, Iran

[3] Yazd Univ, Inst Engn, Fac Min & Met, Mine Exploitat Engn Dept, Yazd, Iran

[4] Sichuan Univ, Sch Architecture & Environm, MOE Key Lab Deep Underground Sci & Engn, Chengdu 610065, Sichuan, Peoples R China

来源：

STRUCTURAL ENGINEERING AND MECHANICS | 2019年 / 71卷 / 01期

关键词：

PFC2D; tunnel; tensile crack; NUMERICAL-ANALYSIS; CONCRETE; SIMULATION; INTERFACE; TOUGHNESS; STRENGTH; BEHAVIOR; FRACTURE; MODEL; SIZE;

D O I：

10.12989/sem.2019.71.1.077

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

In this paper, the interaction between two neighboring tunnel has been investigated using PFC2D. For this purpose, firstly calibration of PFC was performed using Brazilian experimental test. Secondly, various configuration of two neighboring tunnel was prepared and tested by biaxial test. The maximum and minimum principle stresses were 0.2 and 30 MPa respectively. The modeling results show that in most cases, the tensile cracks are dominant mode of cracks that occurred in the model. With increasing the diameter of internal circle, number of cracks decreases in rock pillar also number of total cracks decreases in the model. The rock pillar was heavily broken when its width was too small. In fixed quarter size of tunnel, the crack initiation stress decreases with increasing the central tunnel diameter. In fixed central tunnel size, the crack initiation stress decreases with increasing the quarter size of tunnel.

引用

页码：77 / 87

页数：11

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