PROBABLISTIC SERVICE LIFE PREDICTION FOR LI-LAKE TUNNEL BASED ON NODESTRUCTIVE TESTING OF CONCRETE COVER
The property of concrete cover is one of major factors which can guarantee the durabilityof concrete. In this paper the concrete cover thickness and uitrosonic pulse velocity for Li-Lake Tunnel have been measured by nondestructive testing. The results just conform tonormal distribution. It also develops a conclusion that the CO2 concentration inside city tunnelis just twice or third time of that in normal air based on investigation. In addition, anoptimized carbonation model has been chosen to relate the acclerating carbonation to the filedcarbonating damage. Then the probabilistic carbonation service life of interior tunnel has beenpredicted according to the simulated linear relationship between ultrosonic pulse velocity andthe accelerated carbonation depth. Finally, the tunnel could meet its designed 100 year servicelife, and its corresponding probability for sector a, b and c will be 82.6％, 85.31％, 90.32％respectively.
cover thickness ultrasonic pulse velocity accelerated carbonization depth probabilistic service life tunnel
Mingfang Ba Chunxiang Qian
College of Materials Science and Engineering,South University,Nanjing ,211189,China
国际会议
南京
英文
637-646
2008-10-13（万方平台首次上网日期，不代表论文的发表时间）