Analysis of Surrounding Rock Displacement of Subaqueous Tunnel with Complex Geological Condition

XIANG Xiao － hui; WANG Li; LI Chun － guang

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Journal of Railway Engineering Society ›› 2011, Vol. 28 ›› Issue (2) : 103-108.

Analysis of Surrounding Rock Displacement of Subaqueous Tunnel with Complex Geological Condition

XIANG Xiao － hui1，WANG Li2，LI Chun － guang3

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Abstract

Research purposes: The Liuyanghe Tunnel in Changsha is a bi － way and four － lane tunnel with complex structure and it is composed of a small － distance tunnel，split tunnel and cut － cover tunnel． The monitored results of settlement and convergence of surrounding rock in subsurface excavated area and the analyses of the measures taken in construction and the procedures of tunnel excavation of Liuyanghe Tunnel can be as the reference to construction of the subaqueous tunnel in Changsha．

Research conclusions: The research results show if the measuring point is embed after excavation of core soil，the losses settlement is large． The full － face curtain grouting can be used to reinforce the surrounding rock to achieve better control of the vault settlement of the tunnel． The removal of temporary support has small impact on the displacement of surrounding rock． Using the three bench method and center diagram method to construct the subaqueous tunnel ，the displacement of surrounding rock canbe controlled well．

Key words

subaqueous tunnel / three bench method / CD method / displacement / arch crown settlement

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XIANG Xiao － hui, WANG Li, LI Chun － guang. Analysis of Surrounding Rock Displacement of Subaqueous Tunnel with Complex Geological Condition[J]. Journal of Railway Engineering Society, 2011, 28(2): 103-108

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