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A platform for research: civil engineering, architecture and urbanism
Experimental study of the coupling effect on segmental shield tunnel lining under surcharge loading and excavation unloading
Highlights Physical model tests for segmental tunnel linings under surcharge loading and excavation unloading. A coupling effect index was proposed and the classification was presented. The coupling amplification effect in complex conditions was analyzed.
Abstract Surcharge loading and excavation unloading are two common engineering disturbances affecting the adjacent tunnel in congested urban areas. The coupling effect on segmental shield tunnel lining under loading and unloading conditions is still unclear. In this paper, physical model tests conducted in 1-g plane strain conditions were designed and performed to study the coupling effect of loading and unloading on shield tunnel. The results show that the response of segmental shield tunnel linings will be significantly amplified under the coupling conditions compared with the individual disturbance. A coupling effect index was proposed to evaluate the coupling degree of different disturbances. The classification was also presented, divided into favourable, zero, and unfavourable coupling effects. The tunnel response has a more significant coupling effect in the case of loading first and unloading later. There is a coupling amplification effect of 128% and 144% for the tunnel horizontal convergence and the springline near the excavation.
Experimental study of the coupling effect on segmental shield tunnel lining under surcharge loading and excavation unloading
Highlights Physical model tests for segmental tunnel linings under surcharge loading and excavation unloading. A coupling effect index was proposed and the classification was presented. The coupling amplification effect in complex conditions was analyzed.
Abstract Surcharge loading and excavation unloading are two common engineering disturbances affecting the adjacent tunnel in congested urban areas. The coupling effect on segmental shield tunnel lining under loading and unloading conditions is still unclear. In this paper, physical model tests conducted in 1-g plane strain conditions were designed and performed to study the coupling effect of loading and unloading on shield tunnel. The results show that the response of segmental shield tunnel linings will be significantly amplified under the coupling conditions compared with the individual disturbance. A coupling effect index was proposed to evaluate the coupling degree of different disturbances. The classification was also presented, divided into favourable, zero, and unfavourable coupling effects. The tunnel response has a more significant coupling effect in the case of loading first and unloading later. There is a coupling amplification effect of 128% and 144% for the tunnel horizontal convergence and the springline near the excavation.
Experimental study of the coupling effect on segmental shield tunnel lining under surcharge loading and excavation unloading
Zhang, Jin-Zhang (author) / Huang, Hong-Wei (author) / Zhang, Dong-Ming (author) / Phoon, Kok Kwang (author)
2023-04-26
Article (Journal)
Electronic Resource
English
| British Library Online Contents | 2016
| British Library Online Contents | 2016
| British Library Online Contents | 2016