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Back analysis of cut and cover tunnels in close proximity to an operating railway in Hong Kong

2006; Elsevier BV; Volume: 21; Issue: 3-4 Linguagem: Inglês

10.1016/j.tust.2005.12.092

1878-4364

Pan Jia-zheng, Glen D. Plumbridge, R. Storry, Owen Martin,

Geotechnical Engineering and Analysis

A second rail border crossing between Hong Kong SAR and Mainland China is being constructed. The Kowloon Canton Railway Corporation (KCRC) is constructing the Hong Kong section of the link, the 7.4km Lok Ma Chau Spurline. The design and build contract, 'LBD201 - Sheung Shui to Chau Tau Tunnels' forms part of the Spurline and comprises the design and construction of 3.6km of 8.75m excavated diameter twin bored tunnels and approximately 1.4km of cut-and-cover approach tunnels and associated structures. This paper focuses on the back analysis of the particularly challenging East Approach cut-and-cover tunnels section of the project, which has recently been completed. The results of the back analysis showed the ground stiffness to be consistent with other published data. (A) This paper was presented at Safety in the underground space - Proceedings of the ITA-AITES 2006 World Tunnel Congress and the 32nd ITA General Assembly, Seoul, Korea, 22-27 April 2006. For the covering abstract see ITRD E129148. Reprinted with permission from Elsevier.