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Impact of empty hole behind expressway tunnel lining on structure safety(PDF)

长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]

Issue:
2010年05期
Page:
63-68
Research Field:
Publishing date:
2010-10-20

Info

Title:
Impact of empty hole behind expressway tunnel lining on structure safety
Author(s):
ZHU Chun-sheng1;  YANG Xiao-hua1;  LAI Hong-peng1;  ZHU Yu-ping2
1. Key Laboratory for Bridge and Tunnel of Shaanxi Province, Chang'an University, Xi'an 710064, Shaanxi, China; 2. Xinjiang Branch China Consultation Corporation of Highway Engineering, Urumuqi 830000, Xinjiang, China
Keywords:
tunnel engineering;  simulation analysis;  hole;  structure safety
PACS:
U451.5
DOI:
-
Abstract:
Aiming at the impact of the holes for the tunnel lining to the structure safety in the model test, this carries paper out numerical simulation analysis using ANSYS to study the mechanical properties of lining structure in a different stress field when holes are located in a different location, as well as a hole is backfilled before or after the lining structure, comprehensively evaluate the safety of the tunnel structure combined with model test results. Simulation results show that while a hole exsits upon the tunnel vault or behind the right wall of the tunnel lining, the diseases fasten on the top part of tunnel lining or the right part of the lining in turn, and the lateral pressure coefficient increase largely, the situation becomes obvious. Through the bending moment and the axis force, the structure safety increases by 10%～30% after the hole backfilled. The most increase is that the backfilled hole upon the vault in the stress field giving priority to the horizontal pressure, the bending moment that the lining received reduces by 76%.The secondly the backfilled hole behind the right wall of the tunnel lining in the stress field giving priority to the vertical pressure, the bending moment that the lining received reduces by 71%. 2 tabs, 11 figs, 6 refs.

References:

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Memo

Memo:
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Last Update: 2010-10-20