The Effection of Stress Path on the Rock Relaxation Area of Large-Section Tunnel

Abstract:

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Construction of large-section tunnel leads to changing of rock stress and comes about complicated stress-path, which causes continuously redistribution of rock stress with changing of stress path, leads expansion and change of plastic zone and brings relaxation-are avariation between left guide hole and right guide hole. The paper firstly introduced the construction situation of four-lane tunnel, and then analyzed its developments of design and construction at present. Relying on Dragon Head Mountain expressway tunnel with eight-lane and two way in Guangzhou, analyzed and discussed stress path, rock relaxation area effect on large-section tunnel by using site measured data from multi-displacement meter and numerical calculation result of rock relaxation area in different excavations. At the same time, verified the rational range of rock relaxation-area of large-section four- lane tunnel, which made the rock load of large-section tunnel to be studied further.

Info:

Periodical:

Advanced Materials Research (Volumes 368-373)

Edited by:

Qing Yang, Li Hua Zhu, Jing Jing He, Zeng Feng Yan and Rui Ren

Pages:

2859-2865

DOI:

10.4028/www.scientific.net/AMR.368-373.2859

Citation:

Z. X. Yan et al., "The Effection of Stress Path on the Rock Relaxation Area of Large-Section Tunnel", Advanced Materials Research, Vols. 368-373, pp. 2859-2865, 2012

Online since:

October 2011

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Price:

$35.00

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