Construction method for tunnel contact passage in shield section of underground railway

A communication channel and interval tunnel technology, which is applied in the construction field of the subway shield interval tunnel communication channel, can solve the problems of high construction cost, large frost heaving and thawing, and adverse effects of the surrounding environment, so as to reduce the construction cost and shorten the construction period Effect

Inactive Publication Date: 2007-02-21
SHANGHAI TUNNEL ENGINEERING CO. LTD.
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[0005] The above-mentioned freezing method can be applied to various constructions passing through unstable alluvium and fractured aquifers at present, but there are following deficiencies: (1) The freezing method construction preparation period and implementation period are all long, and the monitoring and stabilization time in the later stage are also long; (2) The freezing method will inevitably produce large frost heave and thawing settlement during the implementation process, which will inevitably cause adverse effects on t

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  • Construction method for tunnel contact passage in shield section of underground railway
  • Construction method for tunnel contact passage in shield section of underground railway

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[0060] The present invention will now be further described in detail with reference to the drawings and specific embodiments.

[0061] See figure 1 Take the construction of a connecting passage in a subway tunnel project as an example. A connecting passage 10 needs to be built between the subway up-and-down tunnel 12 and the down-going tunnel 11. The buried depth of the connecting passage 10 is 16.607m, the outer wall distance of the tunnel is 5.95m, and the height difference between the tunnels 0.11m. The soil layer that the connecting passage 10 penetrates is ④silty clay and ⑤1 clay.

[0062] The specific construction of the project is carried out according to the following steps:

[0063] 1. Reinforce the soil in the entrance and exit area

[0064] Carry out foundation grouting reinforcement for the soil outside the concrete segment near the area where the pipe jacking machine enters and exits the up and down tunnels 12 and 11 [KR1], [KL1] steel pipe segment connecting channel...

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Abstract

The present invention relates to a construction method of underground railway shield-driven running tunnel interconnecting channel. It is characterized by utilizing steel segments of downward tunnel to make grid front earth-cutting device, connecting said grid front earth-catting device with pipe-jacking equipment to form grid squeeze-type pipe-jacking machine, jacking to upward tunnel from downward tunnel and adopting prefabricated composite steel pipe components to assemble them to form the invented interconnecting channel. Said onstruction, method includes the following processes; consolidating earth body in tunnel portal entrance and exit zone, jacking axis measurement setting-out, creating concrete pipe segment supporting system, jacking pie and making pipe go out of tunnel, setting water-proofing seal rubber band, laying guideway, arranging stress-releasing holes, blocking tunnel portal and grouting mortar, etc.

Description

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Application Information

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Owner SHANGHAI TUNNEL ENGINEERING CO. LTD.
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