Global Geology 2010, 13(2) 75-78 DOI:     ISSN: 1673-9736 CN: 22-1371/P

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Keywords
tunnel
cold region
circumferential crack
temperature stress
Authors
PubMed

Study on mechanism of circumferential cracks in cold-region tunnels

ZHOU Lincong, ZHENG Yifeng and LI Zhong

College of Construction Engineering, Jilin University, Changchun 130026, China

Abstract

There exists frost damage in cold-region tunnels. The circumferential cracks affect the function of tunnels. Using three-dimensional finite elementmethod, the authors analyzed the mechanism of circumferential cracks in cold-region tunnels It is proved that the internal thermal stress in lining exceeds the tensile strength of concrete, which is the direct cause for circumferential cracks occurring. The laws of thermal stress in lining induced by parameters such as temperature drop, horizontal drag coefficient and length of lining are analyzed. The conclusions are valuable to the design and construction of cold-region tunnels considering the thermal stress.

Keywords tunnel   cold region   circumferential crack   temperature stress  
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