|Table of Contents|

Distribution Characteristics of Voids Behind Lining of Highway Tunnel and Its Influence on Lining Structure(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2020年02期
Page:
62-70
Research Field:
Publishing date:

Info

Title:
Distribution Characteristics of Voids Behind Lining of Highway Tunnel and Its Influence on Lining Structure
Author(s):
ZHANG Su-lei1; 3;  QI Xiao-qiang1;  LIU Chang2;  CHEN De-gang3
(1. School of Civil Engineering, Qingdao University of Technology, Qingdao 266033, Shandong, China; 2. Key Laboratory for Urban Underground Engineering of Ministry of Education, Beijing Jiaotong University, Beijing 100044, China; 3. Qingjian Group Co., Lt
Keywords:
highway tunnel;  void geometrical characteristics;  lining structure;  mechanical performance;  safety
PACS:
TU317
DOI:
10.19815/j.jace.2020.02007
Abstract:
In view of the present situation of the increasingly prominent problems of the lining structure damage of highway tunnel, based on the lining inspection data of more than 160 highway tunnels, the statistical analysis of the shape characteristics of the voids behind the lining was carried out, and the mechanical performance and safety of the lining structure were evaluated on the basis. The results show that the voids are mainly distributed in grade V and IV surrounding rock sections with poor lining arch position and surrounding rock condition. The longitudinal length of the void is mainly distributed in the range of 0-20 m, and the distribution curve is exponential decreasing. The radial height of the void is mainly distributed in the range of 0-25 cm, and its distribution curve is normal. The average length and height of the void decrease gradually according to the law of vault→haunch→sidewall, V-class→Ⅳ-class→Ⅲ-class. The increase of the void height has little effect on the mechanical performance of the lining structure, while the increase of the circumferential range of the void significantly reduces the safety of the lining. With the increase of the longitudinal length of the void, the stress performance of the lining structure gradually changes to the unfavorable state, but when the longitudinal length of the void increases to a certain value, the further reduction of the safety of the lining structure is limited. The research results can provide reference for the treatment of the void behind the lining.

References:

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Last Update: 2020-04-21