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Prefabricated shield node tunnel under condition of shield intersection and small spacing and construction method

A small-spacing, tunnel-based technology, applied in tunnels, earthwork drilling, mining equipment, etc., can solve problems such as risk interference, achieve the effect of breaking through space restrictions, eliminating impacts, and ensuring construction safety

Active Publication Date: 2016-06-15
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, two shield tunnels are directly used for close-distance construction, and its disadvantages are that there is a lot of risk and interference

Method used

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  • Prefabricated shield node tunnel under condition of shield intersection and small spacing and construction method
  • Prefabricated shield node tunnel under condition of shield intersection and small spacing and construction method
  • Prefabricated shield node tunnel under condition of shield intersection and small spacing and construction method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A prefabricated assembled tunnel with shield intersection and small-pitch shield nodes, which includes two adjacent prefabricated tunnels, namely a left prefabricated tunnel and a right prefabricated tunnel, and each prefabricated tunnel includes a rear curved section, a straight section, and a front curved section respectively. Sections, that is, the rear curve section 1 of the left precast tunnel; the straight section 2 of the left precast tunnel; the front curve section 3 of the left precast tunnel; the rear curve section 4 of the right precast tunnel; the straight section 5 of the right precast tunnel; the front curve section of the right precast tunnel 6. The butt joints of each part are connected with bolts 9; each part of the prefabricated tunnel is integrally cast and formed, and the prefabricated tunnel includes a top plate 10, a bottom plate 11, and a side wall 12 that is connected with the top plate and the bottom plate. A chamfer 13 is provided at the connect...

Embodiment 2

[0044] A construction method for prefabricated assembled tunnels with shield intersections and small-spacing shield nodes, comprising the following steps:

[0045] (1) Manufacture of prefabricated tunnel sections outside the construction site

[0046] The prefabrication steps of the prefabricated tunnel section are as follows: making the formwork of the prefabricated tunnel section, binding the steel cage, reserving bolt holes at the bolt connection parts of the side walls of the prefabricated tunnel section, reserving bolt holes at the butt joints of the longitudinal sections, pouring concrete, curing, and dismantling Template;

[0047] (2) Foundation pit excavation and support

[0048] (1) Excavate the foundation pit to the design depth of the prefabricated tunnel floor, and carry out foundation pit side slope support;

[0049] (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;

[0050] (3) I...

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Abstract

The invention relates to a prefabricated shield node tunnel under the condition of shield intersection and a small spacing, and a construction method. The prefabricated shield node tunnel is especially suitable for complicated construction situations of shield intersection and small-spacing shield. 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 under the condition of the line intersection and the small line spacing is effectively avoided.

Description

technical field [0001] The invention belongs to the technical field of tunnel structures, and in particular relates to a new type of prefabricated and assembled structure of a shield node tunnel, especially suitable for a shield construction method in the case of shield intersection and small spacing, specifically a shield intersection and small spacing Time shield joint prefabricated tunnel and its construction method. 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 increasi...

Claims

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Application Information

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