文档介绍：现 代 隧 道 技 术
MODERN TUNNELLING TECHNOLOGY 荷坳隧道四洞小净距段支护结构设计研究
Study on the Support Structes, excavation sequences of various tubes and support parameters. The load-structure method specified in the
tunnel design code, incremental method and ground-structure method are used to compare and calculate the safety
coefficients of the support structure. The conclusions are as follows: (1) the design method of spatially small-spaced
multi-tube tunnel is put forward based on the principle of total safety factor method; (2) according to the total safety
factor method, the spatially small-spaced four-tube section of He'ao Tunnel shall adopt the excavation and support
mode that "the secondary lining of the first tube should be fully completed before excavation of the next tunnel
tube", and following the excavation sequence during construction: Tube 1 → Tube 2 →Tube 3 → Tube 4; and (3)
the tunnel code specified load-structure method, incremental method and ground-structure method cannot get the
total bearing safety coefficient of the structure, but it can reflect the safety of some support structure to some extent
possible.
: Spatially small-spaced four-tube tunnel; Total safety factor method; Support parameter; Load-structure
Keywords
method; Incremental method; Ground-structure method
南玉铁路平悦隧道贯通
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