High-strength reinforced concrete segment for tunnel support and production method thereof

Abstract

The invention discloses a high-strength reinforced concrete segment for tunnel support and a production method thereof. In raw materials for production of C45, C50,C55 conventional high-strength concrete segments, 35-40 kg of inorganic nanomaterials and 6-8 kg of polypropylene crude fibers are added into each cubic meter of concrete; through the improving effect of the inorganic nanomaterials on grain grading and an interface microstructure, the bonding condition of the polypropylene crude fibers and a concrete interface is improved and the bond stress of the polypropylene crude fibers and theconcrete interface is increased while the compactness of the concrete is improved, and thus the performance such as tensile resistance, compressive resistance, bending resistance and seepage resistance of the produced novel reinforced concrete segment is improved significantly. According to the high-strength reinforced concrete segment for tunnel support and the production method thereof, the problem that the performance of the conventional high-strength reinforced concrete segments is limited by the production raw materials and difficult to improve is solved, meanwhile, the problems that theappearance and quality defects, affecting the performance of the segment, of surface honeycombs, pitted surfaces, microcracks, corner damage and the like are likely to occur in the production processof the conventional high-strength reinforced concrete segments are also solved, and the whole life cost of a diversion tunnel is effectively reduced while the long-term stability of the tunnel undercomplex geological conditions is ensured.

Description

technical field [0001] The invention relates to a concrete segment, especially a high-strength reinforced concrete segment for tunnel support and its production method, which is used for complex geological conditions such as high buried depth, high external water, high ground stress, strong rockburst, and large deformation. To improve the performance of conventional high-strength reinforced concrete segments for tunnel support. Background technique [0002] With the rapid development of national infrastructure construction, in the construction of water conservancy, municipal, railway and other fields, the full-face rock boring machine (TBM) is gradually widely used in the excavation construction of deep and long tunnels, and deep buried long tunnels are inevitable. It will encounter complex engineering geological conditions such as: high buried depth, high external water, high ground stress, rockburst, large deformation of soft rock, crossing fault fracture zone, etc. In or...

AI Technical Summary

Problems solved by technology

However, when the performance of the designed concrete segments in terms of tensile, compressive, bending, and impervious properties during tunnel construction is difficult to meet the support requirements of unfavorable geological tunnel sections, under the conditions of the existing segment design thickness and material source conditions , adding fiber only plays a role in improving the performance of concrete segments in terms of tensile strength and impermeability. formula

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