|Table of Contents|

Support Mechanism and Monitoring Analysis of Pipe Roof Grouting for Loess Highway Tunnel in Shallow-buried Section(PDF)

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

Issue:
2011年01期
Page:
11-15
Research Field:
Publishing date:
2011-03-20

Info

Title:
Support Mechanism and Monitoring Analysis of Pipe Roof Grouting for Loess Highway Tunnel in Shallow-buried Section
Author(s):
ZHU Yan-peng1;  HE Jiang-fei1; 2;  LI Jun3
1. School of Civil Engineering, Lanzhou University of Technology, Lanzhou 730050, Gansu, China; 2. Shaanxi Geotechnical Investigation Institute, Xi'an 710068, Shaanxi, China; 3. CCCC Second Highway Engineering Co., Ltd., Xi'an 710065, Shaanxi, China
Keywords:
tunnel engineering;  long pipe roof;  loess tunnel;  deformation law;  support mechanism;  shallow-buried layer of loess
PACS:
U45
DOI:
-
Abstract:
To discuss the support mechanism and practical application effect of pipe roof grouting mehtod for loess highway tunnel in shallow-buried section, the dynamics measures, such as ground settlement, vault crown settlement and level convergence were made in outlet section of right line of one loess highway tunnel. Based on studying the field monitoring data, the change regulations of shallow-buried section of loess highway tunnel entrance, such as vault crown settlement, level convergence and ground settlement were obtained. Research results show that the method of pipe roof grouting can clearly restrain the deformation and vault crown settlement for shallow-buried layer of loess, and reduce the deformation and stress of tunnel initial support structure, avoid caving in excavating of shallow-buried layer of loess and provide the security reference for the construction work. It provides the reference basis for further analysis of the support mechanism of pipe roof grouting method in loess area, meanwhile, it provides optimized data for the design and construction of pipe roof grouting method for loess highway tunnel in the loess region of North-western China in the future.

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Last Update: 2011-03-20