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Abstract
The proper assembly of underground precast concrete structures is often critical in the construction of underground structures. In particular, interfacial waterproofing between precast concrete segments is a key factor influencing use, safety, and life span. Current practice is to incorporate waterproofing rubber strips in the design. During the installation process, compressive stress is applied to the strip by post-tensioning to achieve performance. For this paper, lateral constraint compression tests were carried out on composite rubber seal strips that utilize putty. Special waterproofing and sealing test devices were designed to investigate corresponding relationships between water pressure and compressive stress (or strain). A relationship between water resistance pressure and compression stress and strain of the putty-based composite rubber strip was proposed based on the series tests and the control target of the minimum compression strain of the putty composite rubber strip was then suggested. Finally, full-scale waterproofing tests on tunnel joints were conducted. The experimental results provide a scientific reference for the engineering application and design of composite sealing rubber strips putty for underground post-tensioned precast concrete structures.
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Details
1 Key Lab of Structures Dynamic Behavior and Control of the Ministry of Education and School of Civil Engineering, Harbin Institute of Technology, Harbin, China; Key Lab of Smart Prevention and Mitigation of Civil Engineering Disasters of the Ministry of Industry and Information Technology, Harbin Institute of Technology, Harbin, China
2 Key Lab of Structures Dynamic Behavior and Control of the Ministry of Education and School of Civil Engineering, Harbin Institute of Technology, Harbin, China
3 Department of Safety Engineering, Korea National University of Transportation, Chungju, Chungbuk, South Korea
4 Department of Architecture and Architectural Engineering, Seoul National University, Seoul, South Korea