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A Study on the Classification and Grading of Environmental Effects on Tunnel Structure Durability
(1 Department of Civil Engineering, Southwest Jiaotong University(Emei), Emei 614202;
2 School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031)
Abstract The structural system and environment structure of a tunnel are distinctive from those of a structure on the ground, and the application of ground structure based durability design parameters to tunnel design has some flaws. By analyzing the structure, environment, and features of tunnel defects, in combination with the current code for environment classification, the structural environment of tunnels are classified into the three categories of general environment, erosive environment, and freezing and thawing environment, and each category is sub-classified as one of three grades according to the tunnel structure hazard levels. Additionally, five comprehensive grades are established based on various environmental combinations and safeguard measures are proposed regarding the durability of the tunnel structure system and the material.
Abstract：
The structural system and environment structure of a tunnel are distinctive from those of a structure on the ground, and the application of ground structure based durability design parameters to tunnel design has some flaws. By analyzing the structure, environment, and features of tunnel defects, in combination with the current code for environment classification, the structural environment of tunnels are classified into the three categories of general environment, erosive environment, and freezing and thawing environment, and each category is sub-classified as one of three grades according to the tunnel structure hazard levels. Additionally, five comprehensive grades are established based on various environmental combinations and safeguard measures are proposed regarding the durability of the tunnel structure system and the material.
FENG Ji-Meng-1,
Tian-Ming-Yang-2
.A Study on the Classification and Grading of Environmental Effects on Tunnel Structure Durability
[J] MODERN TUNNELLING TECHNOLOGY, 2014,V51(3): 85-90
2014, Vol. 51 