<<
[an error occurred while processing this directive] | [an error occurred while processing this directive] >>
On the Causes and the Control Measures of the Tunnel Inverted Arch Heaving in Water-rich Coal Measure Strata
(1 School of Civil Engineering, Central South University, Changsha 410075; 2 School of Civil Engineering, Changsha University of Science & Technology, Changsha 410114)
Abstract When a tunnel in Guizhou passed through the coal measure strata with high water pressure during con? struction, it encountered the problem of the inverted arch heaving. This paper analyzes the causes of the tunnel inverted arch heaving through on-site observation and monitoring of the lining structure deformation, combined with numerical simulation. The results show that the rock softening at the base and high water pressure are the two main factors for the heaving of the tunnel inverted arch, and the former has a greater impact on the safety of the inverted arch structure. Combined with the engineering characteristics and the causes of the disease, comprehensive remediation measures are taken at the site, such as installing additional discharge holes at sidewalls, horizontal and vertical drain pipes to strengthen the drainage system and reduce the water pressure, installing perforated grouting pipes at the arch foot to strengthen the bedrock at the base and replacing the arch structure, etc., achieving good remediation results.
Abstract：
When a tunnel in Guizhou passed through the coal measure strata with high water pressure during con? struction, it encountered the problem of the inverted arch heaving. This paper analyzes the causes of the tunnel inverted arch heaving through on-site observation and monitoring of the lining structure deformation, combined with numerical simulation. The results show that the rock softening at the base and high water pressure are the two main factors for the heaving of the tunnel inverted arch, and the former has a greater impact on the safety of the inverted arch structure. Combined with the engineering characteristics and the causes of the disease, comprehensive remediation measures are taken at the site, such as installing additional discharge holes at sidewalls, horizontal and vertical drain pipes to strengthen the drainage system and reduce the water pressure, installing perforated grouting pipes at the arch foot to strengthen the bedrock at the base and replacing the arch structure, etc., achieving good remediation results.
WAN Zheng1 ZHANG Xuemin1 FENG Han1 OU Xuefeng2 ZHOU Xianshun1
.On the Causes and the Control Measures of the Tunnel Inverted Arch Heaving in Water-rich Coal Measure Strata[J] MODERN TUNNELLING TECHNOLOGY, 2021,V58(3): 216-222
2021, Vol. 58 