Parametric evaluation of drilling foothills’ effect on tunnel maintenance system
Journal Title: International Research Journal of Applied and Basic Sciences - Year 2013, Vol 4, Issue 9
Abstract
Stability analysis of underground spaces is one the important geo-technical issues. Understanding the position of induced and in-situ stress is one of the main necessities in designing tunnel and other underground structures, as in many cases stressesexceed the resistance limit of the rock and the maintenance system, causing the collapse of the structure. In this article induced stresses of static mode drillings on tunnel’s maintenance system has been discussed. Thus by the use of Phase2 software, a domain at 45 degree slope and 100 meters height has been modeled, where a tunnel with diameter of 10 meters has been drilled. Results indicate that due to foothill drillings, axial forces and tensions in the rock bolts have been increased. Examining reliability index of push values, it’s been determined that tensions resulting from drillings cause decrease in reliability indexes in different parts of the drilling site. Besides, values of axial forces, bending moments and Lining shear stresses, show a considerable increment. These cases indicate instability in tunnel’s complex maintenance system.
Authors and Affiliations
KhosroEbrahimkhani*| Department of Civil EngineeringZanjan Branch Islamic Azad UniversityZanjan Iran, Khosro.ebrahimkhani@gmail.com, VahidHosseiniToudeshki| Department of Civil EngineeringZanjan Branch Islamic Azad UniversityZanjan Iran
Keywords
Related Articles
- EP ID EP5694
- DOI -
- Views 318
- Downloads 8
The relationship between job stress and job satisfaction, job performance and job burnout in Neka power plant personnel
Introduction: Based on the studies reviewed, stress, satisfaction, burnout and job performance of the major factors affecting the organizational goals are included. In addition, it has been found that the stress of the j...
The relationship between the components of organizational health and trust among physical education teachers of girls’ schools in Tabriz city
This study was conducted to investigate the relationship between organizational health and organizational trust component of physical education teachers in girls’ schools in Tabriz city in the academic years of 92-93. Th...
Biodiesel Fuel Production From Resdual Animal Fat as An Inedible And Inexpensive Feedstock
In agricultural parts, the main consumers of fuel are diesel engines and agricultural machinery. Between agricultural Machineries Tractors and combines are the greatest consumers of diesel fuel. Bio-diesel is an alternat...
Analysis and investigating into selection criteria of appropriate structure of technical analysis of Stochastic Index,RSI and ADX (case study: Tehran Stock Exchange)
This research studies the applied prediction indices in capital market for the purpose of technical analysis (TA). For this purpose, three indices have been used: stochastic indicator, relative strength index (RSI) and a...
Evaluation the Role of Motivation and Job Satisfaction in Improving the Efficiency of the Staff in the Bureau of Sports and Youth in Tehran, Iran
the aim of this study was to evaluate the impact of motivation and job satisfaction on improving the efficiency of the staff in the bureau of sports and the youth in Tehran, Iran. The statistical society included all the...