Study on the Detection Technology of Structural Function of Sub-Sea Tunnel on Xia-Men East Passage
|School||Southwest Jiaotong University|
|Course||Bridge and Tunnel Engineering|
|Keywords||Cross-Harbour Tunnel Steel corrosion Life Prediction Detect the partition Monitoring and Measurement Detection technology|
This article is relying on China's first undersea tunnel , Xiamen undersea tunnel functional testing of civil structures , has a strong practical value , this article made ??the following : ( 1 ) by the general tunnel a review of the structure and function of detection technology , for diseases such as empty , lining dehiscence , steel corrosion the corresponding detection technology research , including detection frequency and tunnel influencing factors of qualitative research . (2) through the analysis of data on -site monitoring of the Cross-Harbour Tunnel , on-site initial support , lining of water leakage , cracks , landslides situation of research to find the factors affecting the impact of the structural safety of the Cross-Harbour Tunnel : the displacement variation caused by the clearance Less small landslides caused by the empty structure , parts of cracking , cracking the depth and width of the structural safety of the steel corrosion caused by the decline of the carrying capacity , and detection methods for these factors . (3) affect the structural safety of the operation period of the tunnel is the durability of concrete were calculated by the thickness of the protective layer of concrete on -site research , each section of the survey as a the carbonation case of life on the inside and outside of chloride ion erosion environment under each section of life , reinforced the thickness of the protective layer 30a do not need to meet before in the case of closed beta 2.5cm outside 4.7cm detection of reinforced conclusions . (4 ) for the aforementioned influencing factors analysis to partition the entire undersea tunnel test section , and test content for each section of the different stage partition . ( 5 ) tunnel waters lot more water leakage due to strong seawater penetration and the strongly corrosive steel structure during construction , initially supporting part of the structure has begun to corrode , especially weathered deep channel section will will affect the security of the secondary lining , and special attention to strengthen the detection frequency detection .