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CLC number: U455

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Received: 2007-10-09

Revision Accepted: 2008-03-27

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Journal of Zhejiang University SCIENCE A 2008 Vol.9 No.7 P.888~899

10.1631/jzus.A0720025


Mechanical behavior of segment rebar of shield tunnel in construction stage


Author(s):  Jun-sheng CHEN, Hai-hong MO

Affiliation(s):  Department of Civil Engineering, South China University of Technology, Guangzhou 510640, China; more

Corresponding email(s):   jschen@scut.edu.cn

Key Words:  Shield tunnel, Construction, Segment, Rebar, Finite element (FE) analysis


Jun-sheng CHEN, Hai-hong MO. Mechanical behavior of segment rebar of shield tunnel in construction stage[J]. Journal of Zhejiang University Science A, 2008, 9(7): 888~899.

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author="Jun-sheng CHEN, Hai-hong MO",
journal="Journal of Zhejiang University Science A",
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pages="888~899",
year="2008",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.A0720025"
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%T Mechanical behavior of segment rebar of shield tunnel in construction stage
%A Jun-sheng CHEN
%A Hai-hong MO
%J Journal of Zhejiang University SCIENCE A
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%D 2008
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.A0720025

TY - JOUR
T1 - Mechanical behavior of segment rebar of shield tunnel in construction stage
A1 - Jun-sheng CHEN
A1 - Hai-hong MO
J0 - Journal of Zhejiang University Science A
VL - 9
IS - 7
SP - 888
EP - 899
%@ 1673-565X
Y1 - 2008
PB - Zhejiang University Press & Springer
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DOI - 10.1631/jzus.A0720025


Abstract: 
In this paper, a 3D finite element (FE) program ADINA was applied to analyzing a tunnel with 9 segment rings. The loads acting on these segment rings included the squeezing action of tail brush of shield machine under attitude deflection, the jacking forces, the grouting pressure and the soil pressure. The analyses focused on the rebar stress in two statuses: (1) normal construction status without shield machine squeezing; (2) squeezing action induced by shield machine under attitude deflection. The analyses indicated that the rebar stress was evidently affected by the construction loads. In different construction status, the rebar stress ranges from −80 MPa to 50 MPa, and the rebar is in elastic status. Even some cracks appear on segments, the stress of segment rebar is still at a low level. It is helpful to incorporate a certain quantity of steel fiber to improve the anti-crack and shock resistance performance.

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article

Reference

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