scholarly journals Study on the Model Test of the Antibreaking Effect of Fiber Reinforced Concrete Lining in Tunnel

2020 ◽  
Vol 2020 ◽  
pp. 1-11
Author(s):  
Guang-yao Cui ◽  
Xue-lai Wang ◽  
Dao-yuan Wang
Keyword(s):  
Reinforced Concrete ◽  
Safety Factor ◽  
Model Test ◽  
Active Fault ◽  
Fiber Reinforced Concrete ◽  
Structural Safety ◽  
Concrete Lining ◽  
Fiber Reinforced ◽  
Hybrid Fiber ◽  
Earthquake Intensity

In order to study the antibreaking effect of the fiber reinforced concrete lining in the tunnel, this paper takes the a subway tunnel engineering project in F2-3 section of Jiujiawan fault as the research background and carries out the antibreaking model test of the fiber reinforced concrete lining in the active fault zone of high earthquake intensity. The results show that the antibreaking effect of the principle stress and the longitudinal strain of the fiber reinforced concrete lining are 30%∼40% and 80%∼90%, respectively, and the minimum value of the structural safety factor is increased by 4∼5 times. The antibreaking effect of hybrid fiber reinforced concrete lining is better than that of steel fiber reinforced concrete lining. The safety of steel polypropylene hybrid fiber reinforced concrete tunnel lining is the highest, and its minimum structural safety factor is 1.62. In the aspect of improving the antibreaking effect of the tunnel, the toughening effect of fiber reinforced concrete is stronger than that of reinforcing. The research results are of great significance to improve the antibreaking effect of tunnels in active fault areas with high earthquake intensity.

Research on Hybrid Fiber Reinforced Concrete Lining Segments

2018 ◽  
Vol 773 ◽  
pp. 265-270
Author(s):  
Bing Sun ◽  
Wei Xu ◽  
Han Li
Keyword(s):  
Reinforced Concrete ◽  
Building Materials ◽  
Physical And Mechanical Properties ◽  
Tunnel Lining ◽  
Fiber Reinforced Concrete ◽  
Concrete Lining ◽  
Shield Tunnel ◽  
Fiber Reinforced ◽  
Hybrid Fiber ◽  
Shield Tunneling

Numerous cases on tunnel fires emphasized the importance of fire protection of tunnel lining and indicated that fire may cause severe damages to tunnel lining in term of concrete spalling, reduction of physical-mechanical characteristics and load bearing capacity. Hybrid Fiber Reinforced Concrete (HFRC) as a new type of composite building materials has excellent physical and mechanical properties. Compared with ordinary concrete, HFRC’s tensile strength, flexural strength, abrasion resistance, impact resistance, corrosion resistance, fatigue resistance, toughness and cracking resistance, antiknock properties can be increased. Due to the problems existed in the traditional shield tunnel concrete lining segment, the research of new kind of lining segment becomes an important field of the shield tunneling research. The research of hybrid fiber reinforced concrete segment is lacking in application example in China, still in starting stage. The probability for the application of the fiber reinforced concrete segment and some other related questions are discussed in the paper, and it will promote the research and the application of new lining segment in our country.

scholarly journals A review on hybrid fiber reinforced concrete pavements technology

2021 ◽  
Vol 1895 (1) ◽  
pp. 012053
Author(s):  
Hadeel M. Shakir ◽  
Ahmed Farhan Al-Tameemi ◽  
Adel A. Al-Azzawi
Keyword(s):  
Reinforced Concrete ◽  
Fiber Reinforced Concrete ◽  
Concrete Pavements ◽  
Fiber Reinforced ◽  
Hybrid Fiber

Experimental Study of Bending Toughness on Hybrid Fiber Reinforced Concrete

2013 ◽  
Vol 327 ◽  
pp. 201-204
Author(s):  
Jin Song Shi ◽  
Bo Yuan ◽  
Da Zhang Wang ◽  
Zhe An Lu
Keyword(s):  
Experimental Study ◽  
Reinforced Concrete ◽  
Fiber Reinforced Concrete ◽  
Bending Test ◽  
Fiber Reinforced ◽  
Hybrid Fiber ◽  
Toughness Index ◽  
The Difference ◽  
Loading Methods ◽  
Index Value

In order to investigate the difference of current toughness index standards for fiber reinforced concrete, two main groups of specimens were made to take bending toughness test with the requirements of corresponded standards, loading methods and loading speeds, which are ASTM C1018 in America, ACI 544 and JSCE G552 in Japan. United with software Origin, the load-deflection curves gathered from bending test was calculated with relative standards. The results show that the calculated toughness index value with ASTM C1018-98 in America is more accurate with three grades but the requested deflection of testing is much longer than others while ACI 544 and JSCE G552 in Japan are quite the contrary.

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