Concrete tunnel lining material and preparation method thereof

Abstract

The invention discloses a concrete tunnel lining material which is prepared from cement, fly ash, polyethylene chopped fibers, polypropylene profiled fibers, a fiber dispersion bonding aid, a hydration regulator, a polycarboxylate superplasticizer, water and sand, does not have reinforcing bars and can be constructed by virtue of 3D printing equipment. The invention also discloses a preparation method of the material. According to the material, construction of primary lining can be rapidly completed by means of 3D printing equipment after tunnel excavation, the lining concrete has the characteristics of no reinforcement, ultra-thinness, toughness, crack resistance and the like, the construction automation degree is high, the material variability is small, the inner contour surface is flatand smooth, the tunnel lining structure is compact in contact with an original excavation face of a tunnel and free of gaps, surrounding rock above the grade II or above can be directly used as a permanent lining, the surrounding rock of the grade II or below, a waterproof interlayer and a secondary lining can jointly form a composite lining, and therefore long-term safety and comfort of a tunneloperation space are guaranteed.

Description

technical field [0001] The invention relates to the field of tunnel lining structures and materials, in particular to a concrete tunnel lining material and a preparation method thereof. Background technique [0002] With the development of railways and highways, the number and length of tunnels are increasing rapidly. At the same time, due to the objective reality that the technical requirements of railway and highway tunnels are gradually becoming higher, and the construction of tunnels is gradually extending to the complex geological environment in the west, the challenges faced by the modern tunnel operating environment are also increasing. Therefore, as a permanent structure that supports and maintains the long-term stability of the tunnel after excavation, the quality requirements of the tunnel lining are also continuously increasing. However, due to the complexity and uncertainty of the geological environment, the different quality of tunnel construction personnel, th...

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Problems solved by technology

[0004] In view of the disadvantages of conventional tunnel lining materials at present, the technical problem to be solved by the present invention is to provide an unreinforced concrete tunnel lining material with toughness and crack resistance characteristics and high construction quality consistency

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