Experimental Study of Bending Capacity of Shield Tunnel Lining Segment Strengthened by Corrugated Steel

doi:10.3973/j.issn.2096-4498.2019.02.019

Tunnel Construction ›› 2019, Vol. 39 ›› Issue (2): 317-323.DOI: 10.3973/j.issn.2096-4498.2019.02.019

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Experimental Study of Bending Capacity of Shield Tunnel Lining Segment Strengthened by Corrugated Steel

REN Tianyu¹, LIU Shuya², LIU Xian^{3，* }

(1. China Railway Design Corporation, Tianjin 300143, China; 2. Shenzhen Metro Group Co., Ltd., Shenzhen 518000, Guangdong, China; 3. Tongji University, Shanghai 200092, China)

Received:2018-08-31 Revised:2018-12-30 Online:2019-02-20 Published:2019-03-05

Abstract

Abstract:

In order to improve the bearing capacity and stiffness of shield tunnel lining segment, corrugated steel is used to strengthen the shield lining segment. In this paper, fullscale tests are conducted on two segments strengthened by corrugated steel and one segment without strengthening to study the loading progress, failure mode and strengthening mechanism and evaluate the strengthening effect. The test results show that: (1) The corrugated steel is an effective strengthening material which can effectively improve the ultimate bending capacity and stiffness. (2) The failure mode of the strengthened segment is shear failure. (3) Shear stress and radial peeling stress exist on the interface between corrugated steel and segment concrete, and it is necessary to carry out effective countermeasures.

Key words: shield tunnel, lining segment, corrugated steel strengthening, bending capacity, surface stress, fullscale test

CLC Number:

U 45

REN Tianyu, LIU Shuya, LIU Xian. Experimental Study of Bending Capacity of Shield Tunnel Lining Segment Strengthened by Corrugated Steel[J]. Tunnel Construction, 2019, 39(2): 317-323.

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Experimental Study of Bending Capacity of Shield Tunnel Lining Segment Strengthened by Corrugated Steel

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