Comparative Study on Applicability of Normal Section
Design&nbsp;Method
for Steel FiberReinforced Concrete Segment

XIAO Mingqing; FENG Kun; YANG Renjie; XIE Jun; GOU Chao

doi:10.3973/j.issn.2096-4498.2021.09.012

Tunnel Construction >

2021 , Vol. 41 >Issue 9: 1530 - 1537

DOI: https://doi.org/10.3973/j.issn.2096-4498.2021.09.012

Comparative Study on Applicability of Normal Section Design Method for Steel FiberReinforced Concrete Segment

XIAO Mingqing ,
FENG Kun ,
YANG Renjie ,
XIE Jun ,
GOU Chao

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(1. China Railway Siyuan Survey and Design Group Co., Ltd., Wuhan 430071, Hubei, China; 2. National & Local Joint Engineering Research Center of Underwater Tunnel Technology, Wuhan 430071, Hubei, China; 3. Key Laboratory of Transportation Tunnel Engineering, Ministry of Education, Southwest Jiaotong University, Chengdu 610031, Sichuan, China; 4. CCCC First Highway Consultants Co., Ltd., Xi′an 710000, Shaanxi, China)

Online published: 2021-10-01

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Abstract

In China, no uniform design method is currently available for the usage of the steel fiber-reinforced concrete (SFRC) segment structure in shield tunneling. Accordingly, three kinds of SFRC structure design codes are selected and used herein to calculate a specific working condition. The normal section bearing capacity and the crack width obtained by these codes are compared. A mechanical property test of the SFRC segment is then designed and conducted. First, the calculation results obtained by ACI 544 are found to be conservative, consequently underestimating the effect of steel fibers, whereas those obtained by the CECS 38: 2004 and Model Code 2010 models are much reasonable. From the perspective of the segment bearing capacity, the CECS 38: 2004 and Model Code 2010 models can be used to guide the structural design of segments. Second, the maximum crack widths of the SFRC segment in the German standard DIN10451 and CECS 38:2004 are conservative and cannot reflect the crack width of the segment well. Third, considering the influence of steel fiber on the bearing capacity and maximum crack width of the segment, the segment structure design method in Model Code 2010 is recommended for shield tunneling.

Key words： shield tunnel; segmental lining; steel fiber-reinforced concrete; normal section design method

Cite this article

XIAO Mingqing , FENG Kun , YANG Renjie , XIE Jun , GOU Chao .

Comparative Study on Applicability of Normal Section Design Method for Steel FiberReinforced Concrete Segment

[J]. Tunnel Construction, 2021 , 41(9) : 1530 -1537 . DOI: 10.3973/j.issn.2096-4498.2021.09.012

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