scholarly journals EVALUATION METHOD FOR SOUNDNESS OF LINING CONCRETE BY TUNNEL-LINING CRACK INDEX

2009 ◽  
Vol 65 (1) ◽  
pp. 11-16 ◽  
Author(s):  
Takaaki YAMADA ◽  
Nobuo SANO ◽  
Koji BABA ◽  
Yoshiyuki SHIGETA ◽  
Isamu YOSHITAKE ◽  
...  
Keyword(s):  
Evaluation Method ◽  
Tunnel Lining ◽  
Crack Index

scholarly journals Disease Evaluation of Existing Tunnel Lining Based on AHP-Extenics

2021 ◽  
Vol 283 ◽  
pp. 01023
Author(s):  
Danhong Wu ◽  
Li Wu ◽  
Chenyang Ma ◽  
Yufeng Wang ◽  
Dexin Lei ◽  
...  
Keyword(s):  
Index System ◽  
Evaluation Method ◽  
Early Stage ◽  
Safety Evaluation ◽  
Tunnel Lining ◽  
Evaluation Index ◽  
Engineering Practice ◽  
Factors Affecting ◽  
Geological Conditions ◽  
Lining Structure

The existing tunnel lining structure is easily affected by geological conditions, disturbance in the early stage of construction and operation in the later stage. This paper analyzes the main factors affecting the lining structure diseases of existing tunnels from three aspects of engineering construction, natural environment and engineering geology, starting from 13 independent factors affecting the lining structure diseases of existing tunnels. First of all, the index system of the formation factors of lining diseases in the reconstruction and expansion tunnel is established by using the analytic hierarchy process (AHP), and the hierarchical index system is put forward. Based on AHP-Extenics model, the evaluation method of lining structure disease of existing tunnel is proposed. Then, combined with engineering practice and expert scoring, the weight of safety evaluation index is determined, and the safety evaluation index and weight are expanded by using correlation function. Finally, the disease evaluation grade of the existing tunnel lining structure is obtained. This method uses the formal Extenics comprehensive evaluation model, which makes the calculation results more objective and provides a new method for the disease evaluation of the existing tunnel lining structure.

Evaluation method of the falling of concrete piece from tunnel lining

2013 ◽  
pp. 474-481
Author(s):  
K Tsuno ◽  
Y Kojima ◽  
T Nakayama ◽  
T Ushida
Keyword(s):  
Evaluation Method ◽  
Tunnel Lining

scholarly journals Study on the Correlation of Vibration Properties and Crack Index in the Health Assessment of Tunnel Lining

2017 ◽  
Vol 2017 ◽  
pp. 1-9 ◽  
Author(s):  
Xuezhen Wu ◽  
Yujing Jiang ◽  
Kusaba Masaya ◽  
Tetsuya Taniguchi ◽  
Takahide Yamato
Keyword(s):  
Visual Inspection ◽  
Health Assessment ◽  
Tunnel Lining ◽  
New Method ◽  
Ambient Vibration ◽  
Ambient Vibration Test ◽  
Inspection Method ◽  
Vibration Properties ◽  
Average Spectrum ◽  
Crack Index

This paper examines the correlation of vibration properties and crack index of tunnel lining in evaluating risk of collapsing. The visual inspection method, which was widely used, was not reliable enough as the stability of tunnel lining was influenced by the voids and the cracks that were invisible. A new method for the health assessment of tunnel lining was proposed, which can evaluate the whole structural condition according to the vibration properties of tunnel lining. A series of field tests were conducted to evaluate the validity of this new method and to make a comparative analysis with the visual inspection test results. The resultant average spectrum (RAS) of tunnel lining was identified according to the acceleration data of ambient vibration test of Hidake Tunnel in Japan. The tunnel lining crack index (TCI) was also obtained by digital visual inspection test. The correlation between the vibration characteristics and the crack index of tunnel lining was confirmed. However, the voids and the cracks on the inside of the lining were neglected in visual inspection test, which could pose a serious threat to tunnel safety. The vibration measurements by seismometer are an effective way to evaluate the global stability of tunnel lining.

scholarly journals PROPOSE OF TUNNEL CRACK INDEX (TCI) AS AN EVALUATION METHOD FOR LINING CONCRETE

2006 ◽  
Vol 62 (4) ◽  
pp. 628-632 ◽  
Author(s):  
Yoshiyuki SHIGETA ◽  
Toshiyuki TOBITA ◽  
Katsumi KAMEMURA ◽  
Masato SHINJI ◽  
Isamu YOSHITAKE ◽  
...  
Keyword(s):  
Evaluation Method ◽  
Tunnel Crack ◽  
Crack Index
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