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Application of Non-Curing Rubber Asphalt Coating in Waterproofing of Shield Tunnel Segment Joints in Water-rich Stratum
(1 School of Geosciences and Info-Physics, Central South University, Changsha 410083; 2 Key Laboratory of Metallogenic Prediction of Nonferrous Metals and Geological Environment Monitoring of Ministry of Education, Central South University Changsha 410083;3 China Construction Tunnel Corp., Ltd., Chongqing 401320)
Abstract The waterproof effect of shield tunnel segment joints affects the construction and operation quality and safety of tunnels in the water-rich stratum, and it can′ t meet the waterproof requirements of segment joints by the conventional measures. Based on an investigation and analysis of the composition, non-curing performance and waterproof mechanism of the non-curing rubber asphalt coating, a composite waterproofing technology combining noncuring rubber asphalt coating with rubber gasket for the joints of shield tunnel segments was proposed and applied in a test section of the shield tunnel of Changsha metro underneath the Liuyang River. A statistic was conducted regarding the water leakage of both the left and right tunnel tube after shield driving beneath the Liuyang River. The test results show that this composite waterproof technology for the joints of shield tunnel segments can effectively reduce the rate of water leakage.
Abstract：
The waterproof effect of shield tunnel segment joints affects the construction and operation quality and safety of tunnels in the water-rich stratum, and it can′ t meet the waterproof requirements of segment joints by the conventional measures. Based on an investigation and analysis of the composition, non-curing performance and waterproof mechanism of the non-curing rubber asphalt coating, a composite waterproofing technology combining noncuring rubber asphalt coating with rubber gasket for the joints of shield tunnel segments was proposed and applied in a test section of the shield tunnel of Changsha metro underneath the Liuyang River. A statistic was conducted regarding the water leakage of both the left and right tunnel tube after shield driving beneath the Liuyang River. The test results show that this composite waterproof technology for the joints of shield tunnel segments can effectively reduce the rate of water leakage.
ZHU Kaofei1,
2 HE Xiangdong1,
2 QUAN Yonghua3 ZHONG Wenjing3 ZHANG Keneng1 etc
.Application of Non-Curing Rubber Asphalt Coating in Waterproofing of Shield Tunnel Segment Joints in Water-rich Stratum[J] MODERN TUNNELLING TECHNOLOGY, 2019,V56(5): 201-205
2019, Vol. 56 