Repairing method for unfilled corner and broken corner of shield segment

A technology for shield segments and chipping, which is applied in the field of repairing missing and chipping of shield segments. It can solve the problems of easy falling off, fragile and broken segments, and poor appearance quality, so as to enhance waterproofing and ensure the overall Quality, overall performance and complete effect

Pending Publication Date: 2020-11-03
CHINA RAILWAY NO 3 GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the current conventional repair methods for missing corners and chipped corners of shield tunneling often show that the joint between the repaired part and the segment itself is not high and easy to fall off, the strength of the repaired part of the segment is not high and easy to break, and the color difference of the segment after repair is serious. Poor appearance quality, etc., so we propose a repair method for shield segment chipping and chipping to solve the above problems

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] This embodiment proposes a method for repairing missing corners and chipping of shield segments, including the following steps:

[0026] Step S1: Chisel off the loose concrete and protruding aggregate particles at the chipped corner;

[0027] Step S2: Clean up the cracked corners on the segments, rinse them with clean water, and wait for the damaged surface to dry before repairing;

[0028] Step S3: Mixing mortar: prepare mortar, take proper amount of material according to the size of the chipping angle during repairing and mix according to the general technical requirements, and mix the mortar evenly;

[0029] Step S4: After filling layer by layer, perform smoothing and trimming. After the repair mortar is dry and hard, use a grinder to smooth the surface;

[0030] Step S5: Use a wire brush to clean and moisten the repaired part, and then use cement slurry to repair the repaired part;

[0031] Step S6: Wait for the preliminary solidification of the slurry described i...

Embodiment 2

[0036] This embodiment proposes a method for repairing missing corners and chipping of shield segments, including the following steps:

[0037] Step S1: Chisel off the loose concrete and protruding aggregate particles at the chipped corner;

[0038] Step S2: Clean up the cracked corners on the segments, rinse them with clean water, and wait for the damaged surface to dry before repairing;

[0039] Step S3: Mixing mortar: prepare mortar, take proper amount of material according to the size of the chipping angle during repairing and mix according to the general technical requirements, and mix the mortar evenly;

[0040] Step S4: After filling layer by layer, perform smoothing and trimming. After the repair mortar is dry and hard, use a grinder to smooth the surface;

[0041] Step S5: Use a wire brush to clean and moisten the repaired part, and then use cement slurry to repair the repaired part;

[0042] Step S6: Wait for the preliminary solidification of the slurry described i...

Embodiment 3

[0047] This embodiment proposes a method for repairing missing corners and chipping of shield segments, including the following steps:

[0048] Step S1: Chisel off the loose concrete and protruding aggregate particles at the chipped corner;

[0049] Step S2: Clean up the cracked corners on the segments, rinse them with clean water, and wait for the damaged surface to dry before repairing;

[0050] Step S3: Mixing mortar: prepare mortar, take proper amount of material according to the size of the chipping angle during repairing and mix according to the general technical requirements, and mix the mortar evenly;

[0051] Step S4: After filling layer by layer, perform smoothing and trimming. After the repair mortar is dry and hard, use a grinder to smooth the surface;

[0052] Step S5: Use a wire brush to clean and moisten the repaired part, and then use cement slurry to repair the repaired part;

[0053] Step S6: Wait for the preliminary solidification of the slurry described i...

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PUM

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Abstract

The invention discloses a repairing method for an unfilled corner and a broken corner of a shield segment. The repairing method comprises the following steps of S1, chiseling off uncompacted concreteand protruding aggregate particles at the broken corner; S2, thoroughly cleaning the broken corner on the shield segment, performing flushing with clear water, and waiting for dry state of the damagedsurface; S3, performing mortar mixing: preparing mortar, taking a proper quantity of materials according to the size of the broken corner, performing mixing according to general technical requirements, and uniformly stirring the mortar; S4, performing leveling and trimming after layer-by-layer filling is conducted, and after the mortar to be repaired is dried and hardened, grinding the surface tobe flat through a grinding machine; and S5, performing cleaning and wetting on the repaired part through a steel wire brush, and then performing plastering finishing on the repaired part through cement paste. The repairing method for an unfilled corner and a broken corner of a shield segment effectively overcomes the defects that through a conventional repairing method, repairing strength cannotmeet the requirement, the repaired part is easy to fall off, and chromatic aberration is serious, it is ensured that the overall performance of the repaired shield segment is more complete and attractive, the waterproof and anti-seepage performance of a tunnel is further enhanced, and the overall quality of the tunnel is ensured.

Description

technical field [0001] The invention relates to the technical field of repairing tunnel segments, in particular to a method for repairing missing corners and chipped corners of shield tunneling segments. Background technique [0002] Tunnel segment fragmentation is a common problem in shield tunnels. It is unavoidable during the construction process. Relevant repair work needs to be carried out in the later stage. How to improve the quality of segment repair and even take reinforcement measures to reduce hidden dangers after tunnel operation will be The construction of the subway project will be the focus of future work and technical problems that need to be solved. After retrieval, the Chinese patent with the publication number CN103643965A discloses a construction method for repairing and reinforcing construction of formed tunnel segments. 4. Drilling and planting bars, 5. Brushing interface agent, 6. Binding steel mesh, 7. Applying polymer repair mortar; the specific ste...

Claims

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Application Information

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IPC IPC(8): E21D11/08C04B28/04
CPCE21D11/08E21D11/086C04B28/04C04B14/06C04B2103/0068
Inventor 赵海波刘承宏王磊王颖梅陈宇博徐建伟谭旺王凯华赵宝典郭爱强
Owner CHINA RAILWAY NO 3 GRP CO LTD
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