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Prefabricated Tunnel and Construction Method of Shield Tunnel Joint when Shield Tunneling Up and Down

A shield tunnel and tunnel technology, applied in tunnels, tunnel linings, underground chambers, etc., can solve problems such as collapse, affecting the operation of existing tunnel trains, existing tunnel subsidence, etc. The effect of the construction period

Active Publication Date: 2017-11-17
JINAN RAILWAY TRANSPORT GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the common treatment method is to grout the ground between the upper and lower tunnels to reduce the impact of the construction of the down (up) tunnel on the up (down) tunnel, but the impact of the construction of the new tunnel on the deformation of the existing tunnel is unavoidable. In the slightest, it will affect the operation of trains in the existing tunnels, and in severe cases, it will cause the entire existing tunnels to subside and collapse, causing major safety accidents

Method used

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  • Prefabricated Tunnel and Construction Method of Shield Tunnel Joint when Shield Tunneling Up and Down
  • Prefabricated Tunnel and Construction Method of Shield Tunnel Joint when Shield Tunneling Up and Down
  • Prefabricated Tunnel and Construction Method of Shield Tunnel Joint when Shield Tunneling Up and Down

Examples

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Effect test

Embodiment 1

[0045] A prefabricated assembled tunnel with shield passing through shield nodes up and down, combining four shield tunnels passing up and down into one place, and the four shield tunnels are separate prefabricated tunnels, and the prefabricated tunnels include a roof 10, a bottom 11 and a top plate 10 and the bottom plate 11 are matched with the side wall 12 connected, and a chamfer 1 is provided at the joint between the top plate 10 and the side wall 12, and a chamfer 1 is provided at the joint between the bottom plate 11 and the side wall 12. Two tunnels at the same height are in The side walls are connected with bolts 9; bolt holes are reserved in the bottom plate 11 of the upper tunnel and the roof 10 of the lower tunnel, and the upper and lower tunnels are connected as a whole with bolts 9, that is, the prefabricated tunnel 13 on the left side of the upper layer and the right side of the upper layer The prefabricated tunnel 14; the prefabricated tunnel 15 on the left side...

Embodiment 2

[0051] A construction method for a prefabricated assembled tunnel at a shield node when a shield passes up and down, comprising the following steps:

[0052] (1) Fabrication of prefabricated tunnels outside the construction site

[0053] The prefabrication steps of the prefabricated tunnel are: making the formwork of the prefabricated tunnel, binding the steel cage, reserving bolt holes on the side walls of the prefabricated tunnel where bolts need to be connected, and reserving bolts on the prefabricated tunnel floor above and the prefabricated tunnel roof below. Holes, pouring concrete, curing, removing formwork;

[0054] (2) Foundation pit excavation and support

[0055] (1) Excavate the foundation pit to the design depth of the prefabricated tunnel floor below, and carry out foundation pit side slope support;

[0056] (2) The bottom of the pit is compacted or grouted within 3-5 meters below the bottom of the pit to reinforce the bottom of the pit;

[0057] (3) Prefabric...

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Abstract

The invention relates to a prefabricated shield node tunnel during longitudinal shield crossing, and a construction method. The prefabricated shield node tunnel is especially suitable for a complicated construction situation of longitudinal shield crossing. A prefabricated shield node tunnel structure is embedded into a specified position and a shield is driven to pass through the prefabricated structure without excavation in the prefabricated structure when passing through the prefabricated structure. The construction of the shield node tunnel is carried out with the method, so that the construction risk of shield tunneling during longitudinal line crossing is effectively avoided.

Description

technical field [0001] The invention belongs to the technical field of tunnel structures, and in particular relates to a new prefabricated and assembled structure of a shield node tunnel, especially suitable for shield tunnel construction when the shield tunnel passes up and down, and specifically relates to a prefabricated shield tunnel node when the shield tunnel passes up and down Tunnels and construction methods. Background technique [0002] The establishment of urban underground transportation system plays a vital role in alleviating the increasingly tense urban traffic congestion. In January 2015, the National Development and Reform Commission officially approved the short-term construction plan of Jinan's rail transit. So far, China has spent more than 50 years to make all municipalities and sub-provincial cities have a relationship with the subway. With the continuous improvement of the urban rail transit network, the construction environment has become increasingl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D9/14E21D11/08E21D9/00E21D11/10
CPCE21D9/00E21D9/14E21D11/003E21D11/08E21D11/083E21D11/10
Inventor 王国富路林海秦世朋王德超
Owner JINAN RAILWAY TRANSPORT GRP CO LTD
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