A micro-expansion grouting material for tunnel lining vault with mold grouting

A technology of micro-expansion and grouting material, which is applied in the field of concrete materials, can solve the problems of insufficient compatibility and combination, hollowing out of tunnel vaults, easy shrinkage and deformation, etc., achieve good fluidity and pumpability, and improve The overall bearing capacity and the effect of improving the humidity field

Active Publication Date: 2020-04-21
WUHAN UNIV OF TECH
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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the currently used micro-expansion grouting material for tunnel lining vault belt mold grouting is easy to shrink and deform, and the lack of compatibility and combination leads to quality defects such as hollowing out and cracking of the tunnel vault. , providing a micro-expansion grouting material for tunnel lining vault belt mold grouting

Method used

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  • A micro-expansion grouting material for tunnel lining vault with mold grouting
  • A micro-expansion grouting material for tunnel lining vault with mold grouting

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Embodiment Construction

[0014] In order to enable those of ordinary skill in the art to fully understand the technical solutions and beneficial effects of the present invention, further descriptions are given below in conjunction with specific embodiments.

[0015] A micro-expansion grouting material for grouting with a mold on the vault of tunnel lining. It is made by mixing the following raw materials in parts by weight: 750-800 parts of gelling component, 900-1350 parts of composite grade quartz sand , Graphene oxide modified mineral admixture 100 to 150 parts, volume stability regulator 8 to 10 parts, enhanced water reducing agent 2 to 3 parts, water to material ratio 0.16 to 0.19. The cementitious component is mixed with 42.5 grade ordinary Portland cement and 42.5 grade sulphoaluminate cement at a mass ratio of 19:1, mixed with triethanolamine equivalent to 0.05% of the total mass of the two cements, and ground to a ratio The surface area is 400~500m 2 / kg. The composite graded quartz sand used i...

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Abstract

The invention discloses a micro-expansive grouting material for tunnel lining vault mold grouting in order to mainly solve the problems of disengaging, crack and other quality defects of tunnel vaults, caused by easy shrinkage deformation, poor compatibility and poor bonding property of existing like grouting materials. The micro-expansive grouting material is obtained through adding water to 750-800 parts of a gelling component, 900-1350 parts of compounded quartz sands, 100-150 parts of a graphene oxide modified mineral admixture, 8-10 parts of a volume stability regulator and 2-3 parts of areinforced water reducer, and mixing and stirring the above raw materials and the water, wherein a ratio of the water to the total materials is 0.16 to 0.19. The micro-expansive grouting material hasgood fluidity and good pumpability, and has a binding performance with lining concrete, and has significant economic and social benefits in the infrastructure industry.

Description

Technical field [0001] The invention relates to the technical field of concrete materials, in particular to a micro-expansion grouting material used for grouting with a mold for tunnel lining vaults. Background technique [0002] During the pouring process of tunnel arch lining concrete, due to insufficient pumping pressure or premature extubation and other reasons, it is easy to cause quality defects such as insufficient thickness, voiding, and cracking of the vault lining concrete. In order to improve the lining quality of railway tunnels and prevent the concrete from falling out of the tunnel vault during operation, the Beijing-Shenzhen-Jingji Passenger Special Headquarters of China Railway 11th Bureau successfully developed a tunnel vault grouting construction technology with a mold. Carry out transformation, set a certain number of grouting holes along the longitudinal direction of the lining trolley formwork at the center line of the lining trolley, install fixed flanges fo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/06C04B20/02C04B111/34
CPCC04B20/023C04B28/06C04B2111/00146C04B2111/00724C04B2111/343C04B2201/50C04B18/08C04B18/146C04B7/02C04B14/06C04B2103/0068C04B18/16C04B2103/0051C04B22/002C04B22/10C04B2103/302
Inventor 李相国刘漪刘卓霖蒋文广任钊锋冯志浩胡建城
Owner WUHAN UNIV OF TECH
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