Theoretical Analysis on Pressure Arch Boundary around Circular Tunnel

Da Peng Li; Chuan An Cui; Cheng Hui Duan; Jian Kui Zhao

doi:10.4028/www.scientific.net/AMM.256-259.1191

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 256-259Theoretical Analysis on Pressure Arch Boundary...

Theoretical Analysis on Pressure Arch Boundary around Circular Tunnel

Abstract:

Pressure arch is a phenomenon of rock mass stress restructuring to display itself bearing capacity, one of the important aspects is determination of the pressure arch boundary, and now the main method to determine the pressure arch boundary is numerical analysis. In order to determine the pressure arch boundary theoretically, a circular tunnel is taken as analyzing model, and the secondary stress condition around the rock mass is analyzed, also the equations of horizontal stress and vertical stress are deduced, and then the variation regulation of horizontal stress and vertical stress are discussed. On this basis, 3 kinds of pressure arch boundary determination methods are researched, and the boundaries of each method are found out, finally, the differences of the methods are compared. The results show that every determination method of pressure arch boundary has its own rationality, and they can provide reference for engineering and new arch boundary determination method.

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Periodical:

Applied Mechanics and Materials (Volumes 256-259)

Pages:

1191-1194

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.256-259.1191

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Online since:

December 2012

Authors:

Da Peng Li, Chuan An Cui, Cheng Hui Duan, Jian Kui Zhao

Keywords:

Arch Boundary, Circular Tunnel, Pressure Arch, Theoretical Analysis

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