Abstract
The entrance portion of Songjiaping Railway Tunnel, located in Shaanxi Province, China, was subject to asymmetric load due to the presence of a sharp slope on the left. By the routine bench excavationsupport method, up to 12 cm of crown settlement of initial support and 4cm wide crack on the slope were encountered. To reduce the deformations, the horizontal jet grouting technique was used to presupport the soft ground. To estimate the strengthening effect of the technique, a 3D elasto-plastic finite element model is used in this paper to simulate the mechanical behavior of the horizontal jet-grouted prelining The results of the simulation and those from field measurements shows that the jet-grouted arch shed can be used to confine the ground deformation. (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.
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