Double-split starting method of small-clearance double-line tunnel shield

A technology of split-start, double-track tunnels, applied in tunnels, tunnel linings, earth-moving drilling and mining, etc., can solve problems such as the difficulty of starting stations with construction lengths

Pending Publication Date: 2020-02-04
中铁隧道集团一处有限公司 +1
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

In the complex surrounding environment of the city, affected by the demolition and land occupation of ground buildings (structures), the relocation of underground municipal pipelines, and the transformation of ground traffic guidance, it is difficult to construct a starting station with a suitable length

Method used

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  • Double-split starting method of small-clearance double-line tunnel shield
  • Double-split starting method of small-clearance double-line tunnel shield
  • Double-split starting method of small-clearance double-line tunnel shield

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0116] Take shield machine host 8, equipment bridge 9, and 1# trailer 10 as an example with a total length of about 85m and a fixed excavation distance of 100m.

[0117] ⅰ. The main structure of the station where the layout starts

[0118] Restricted by the construction length limit of the main structure of the station, the shield tunneling is carried out in a separate launching method. The opening door of the launching shaft is 15 distances from the excavation opening, and the shield machine main engine 8, the equipment bridge 9 and the 1# trailer 10 can be placed. , place 2# trailer 11, 3# trailer 12, 4# trailer 13, and 5# trailer 14 in the space near the side wall, connect 1# trailer 10 with 2# trailer 11 through the extension pipeline 39, and connect 6# trailer 17 is placed on the ground and will not be used temporarily. After 100m of excavation is completed, remove the negative ring, transfer 2# trailer 11, 3# trailer 12, 4# trailer 13, and 5# trailer 14 to the axis of sh...

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PUM

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Abstract

The invention discloses a double-split starting method of a small-clearance double-line tunnel shield. The method comprises the following steps that arranging a starting station main body structure, backfilling and reinforcing a starting end, installing a temporary seal of a tunnel door, installing a starting frame, assembling and debugging a shield, installing a reaction frame, installing a negative ring segment, and performing starting trial tunneling of the shield. According to the method, the reasonable space layout is carried out on a starting station structure well, temporary reverse hidden excavation pilot tunnel is constructed to assist split starting, the shield starting frame, the reaction frame and the negative ring segment are sequentially installed, the split starting construction of the double-line small-clearance tunnel shield under the condition that the whole starting is difficult due to the insufficient space of a site is realized, and engineering practice verifies that the split starting method has the advantages of small construction cross influence, small influence on the surrounding environment, reduction of construction period pressure, safety, reliability and the like, and can be applicable to projects with insufficient length of the end well of the subway shield starting vehicle station.

Description

technical field [0001] The invention belongs to the field of tunnel start-up engineering, and in particular relates to a double-split start-up method of a small-clear-distance double-line tunnel shield. Background technique [0002] With the rapid development of urban rail transit, shield construction has gradually become the main method for constructing underground tunnels. According to the conventional shield construction process requirements, it is necessary to set up the shield tunnel at the end of the station, and the construction scope of the main structure of the station should have the conditions for placing the shield machine head, the length space of the supporting equipment and the setting of slag holes. Complete the corresponding starting work in the starting well of the head. [0003] To meet the above conditions, the construction of the main body of the station needs to occupy a large amount of construction site to meet the construction needs. The conventional...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D9/00E21D9/06E21F15/00E21F17/12E21D11/08
CPCE21D9/00E21D9/06E21D11/08E21F15/005E21F17/12
Inventor 张建国马艳卫朱占国黄德科康直王世清吕宝伟林森斌邵标王达麟张立鹏李楠王猛
Owner 中铁隧道集团一处有限公司
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