Shield tunnel slab staggering problem handling structure and construction method

A technology for shield tunneling and staggered platform is applied in the field of shield tunnel staggered platform disease treatment structure and construction. Cost-convenient, structurally stable, and waterproof

Inactive Publication Date: 2016-07-06
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The above-mentioned methods all have their disadvantages: for slight misalignment, the repeated vibration of the epoxy mortar used for filling will cause fatigue of the repaired part during vehicle operation, which will easily lead to falling off; for more serious misalignment, only bolts are implanted and Combined with cement-mixed mortar, the bonding force is not strong enough, the overall bearing capacity of the repaired structure is low, and the treatment effect is not significant

Method used

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  • Shield tunnel slab staggering problem handling structure and construction method
  • Shield tunnel slab staggering problem handling structure and construction method

Examples

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Embodiment

[0043]The example is a shield tunnel in a certain section of the Xi'an Metro. The tunnel is located in the old loess and silty clay layer. Due to the damage of the underground pipeline, water gushing, sand gushing, and a large amount of sand appeared behind the segment on the east side of the connecting passage of section 1#. The loss of the segment causes voids to form around the segment and uneven stress on the segment, resulting in varying degrees of misalignment in the 481-511 ring segment. The maximum circumferential misalignment is 2 cm, and the maximum longitudinal misalignment is about 8 cm.

[0044] In order to prevent further cracking, damage, and chipping of the edge of the segment, and even cause slurry leakage and water seepage in the tunnel, this embodiment adopts a method such as Figure 1 ~ Figure 2 The specific construction of the tunnel dislocation treatment structure of the present invention includes the following steps:

[0045] Step 1: Remove the broken an...

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Abstract

The invention discloses a shield tunnel slab staggering problem handling structure and a construction method. The shield tunnel slab staggering problem handling structure comprises a staggered slab lifting pipe piece, a staggered slab sinking pipe piece, embedded steel bars, a reinforcing mesh, repairing mortar and a rubber waterstop, wherein a plurality of blind holes are formed in the staggered slab lifting pipe piece, and the embedded steel bars are anchored onto the staggered slab lifting pipe piece through the blind holes in the staggered slab lifting pipe piece and steel bar embedding adhesives; the reinforcing mesh and the embedded steel bars are connected through spot welding; a gap in the slab staggering position repaired through the steel bars and the reinforcing mesh is filled with the repairing mortar; and the rubber waterstop is anchored to the side, closely attached to the repairing mortar, of the staggered slab sinking pipe piece. The construction method comprises the steps that firstly, drilling burrs on the surfaces of the staggered slab pipe pieces are removed; secondly, the steel bars are embedded in the holes after the holes are drilled in the surface of the staggered slab lifting pipe piece, and the reinforcing mesh is laid at the same time; and finally, the staggered slab pipe pieces are repaired by means of the repairing mortar. The shield tunnel slab staggering problem handling structure is simple, construction is convenient, the mechanical property is good, the cost is low, and the shield tunnel slab staggering problem can be effectively handled.

Description

Technical field: [0001] The invention belongs to the field of repairing diseases of shield tunnels, and in particular relates to a structure and a construction method for treating diseases of shield tunnel staggered platforms. Background technique: [0002] Staggered platform is one of the common defects in the construction of subway shield tunnels. Due to improper grouting control and irregular assembly operations of shield segments, the size between adjacent segments of the same ring or between segments of different rings will appear. Deviation, that is, the occurrence of circumferential and longitudinal staggering. If the segment misalignment disease is not repaired in time, it will cause quality problems such as cracking, damage, and chipping at the edge of the segment. In severe cases, it will cause slurry leakage and water seepage in the tunnel, and the shield tail brush will be squeezed and damaged, resulting in slurry leakage at the shield tail, etc. , so invent a s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D11/08E21D11/38
CPCE21D11/083E21D11/385
Inventor 赖金星周慧冯志华贺思悦王亚琼来弘鹏刘禹阳张玉伟昝文博
Owner CHANGAN UNIV
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