ISSN 2096-4498
CN 44-1745/U
Tunnel Construction ›› 2020, Vol. 40 ›› Issue (S2): 241-248.DOI: 10.3973/j.issn.2096-4498.2020.S2.031
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YANG Hua, XU Jiqi, YAN You
Online:
Published:
Abstract: The mud gushing and large deformation occurred to Laohongpo tunnel of DaliRuili railway when crossing contact zone between soluble rock and nonsoluble rock. According, the deformation, cracking and geological causes are analyzed, the mud gushing scope in main tunnel is explored by using bypass heading, the working chamber in tunnel is enlarged, treatment method of advanced horizontal grouting + highpressure horizontal jet grouting pile and advanced horizontal large pipe roof is adopted, and the support and lining structure are adjusted and strengthened. According to the site working conditions, the threebench method is adopted to separate and replace the steel frame in sections. The temporary invert or temporary cross brace is added at the arch foot of the steel frame to control the convergence deformation. The grid steel frame formwork lining is constructed in time, and the permanent secondary lining is constructed after the deformation becomes stable. The technology mentioned has been successfully applied to the construction practice in Laohongpo tunnel of DaliRuili railway, and good results have been achieved.
Key words:  , railway tunnel, large deformation of contact zone with mud gushing, bypass heading, horizontal jet grouting pile, advanced horizontal long pipe roof
YANG Hua, XU Jiqi, YAN You . Treatment Technology for Mud Gushing from One Side of Laohongpo Tunnel Crossing Contact Zone of DaliRuili Railway[J]. Tunnel Construction, 2020, 40(S2): 241-248.
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URL: http://www.suidaojs.com/EN/10.3973/j.issn.2096-4498.2020.S2.031
http://www.suidaojs.com/EN/Y2020/V40/IS2/241
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