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隧道建设（中英文） ›› 2018, Vol. 38 ›› Issue (3): 434-443.DOI: 10.3973/j.issn.2096-4498.2018.03.011
MA Zhifu*, YANG Changxian
马志富*， 杨昌贤
摘要：
In order to deal with the technical problems of Shuangfeng Tunnel passing through waterrich Tertiary sandy mudstone strata with long distance and big overburden, such as dewatering, advance reinforcement, structural design and construction method etc., reducing tunnel deformation, preventing water inrush, gushing mud and tunnel collapse, the technical route of "stereo exploration, pressure reduction by water releasing, pregrouting, supporting timely, overall monitoring" is established after the field test and data analysis. Methods of fulldimensional exploration and water pressure reducing are proposed, which form the preceding reinforcing technology that are different between inside the excavation contour and outside the excavation contour. Support linings are constructed immediately after excavation of upper bench. Safety performance of tunnel structure is evaluated according to the monitoring results. The research is conducted based on Shuangfeng Tunnel and the study results are applied in the construction of the tunnel. Results indicate that it can make sense to control deformation and ensure safety by using methods of reducing pressure through fulldimensional water release, adopting advance reinforcement measures that are different between inside the excavation contour and outside the excavation contour, proposing minibench method during tunnel construction and supporting timely after excavation for tunnels passing through waterrich Tertiary sandy mudstone strata.
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