Location

New York, New York

Session Start Date

4-13-2004

Session End Date

4-17-2004

Abstract

The purpose of this research is the determination of maximum rate of advance in one stage of blasting in middle zone of Kaka-Reza water conveyance tunnel. In this zone of tunnel with average 700 meters of overburden, based on geological and geo-mechanical conditions, the supporting system will install immediately after excavation. The methodology of this research is combined of direct strain evaluation technique (DSET), numerical modeling (FLAC 2D) and convergence analysis. The research is done in three stages. At the first stage, the allowable strain in surrounding rock mass of tunnel is calculated based on DSET. At the second stage, allowable convergence is determined by using the value of allowable strain and numerical modeling (FLAC 2D) together. At the third stage of research, with using of convergence analysis and value of allowable convergence, the maximum rate of advance in one stage of blasting is determined and equal to one meter.

Department(s)

Civil, Architectural and Environmental Engineering

Appears In

International Conference on Case Histories in Geotechnical Engineering

Meeting Name

Fifth Conference

Publisher

University of Missouri--Rolla

Publication Date

4-13-2004

Document Version

Final Version

Rights

© 2004 University of Missouri--Rolla, All rights reserved.

Document Type

Article - Conference proceedings

File Type

text

Language

English

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Apr 13th, 12:00 AM Apr 17th, 12:00 AM

Estimation of Maximum Advance in Kaka-Reza Water Conveyance Tunnel at 700 Meter Depth

New York, New York

The purpose of this research is the determination of maximum rate of advance in one stage of blasting in middle zone of Kaka-Reza water conveyance tunnel. In this zone of tunnel with average 700 meters of overburden, based on geological and geo-mechanical conditions, the supporting system will install immediately after excavation. The methodology of this research is combined of direct strain evaluation technique (DSET), numerical modeling (FLAC 2D) and convergence analysis. The research is done in three stages. At the first stage, the allowable strain in surrounding rock mass of tunnel is calculated based on DSET. At the second stage, allowable convergence is determined by using the value of allowable strain and numerical modeling (FLAC 2D) together. At the third stage of research, with using of convergence analysis and value of allowable convergence, the maximum rate of advance in one stage of blasting is determined and equal to one meter.