Tunnel internal surface reinforcing material, preparation method thereof, and reinforcing method

Abstract

The invention discloses a tunnel internal surface reinforcing material, a preparation method thereof, and a reinforcing method. The tunnel internal surface reinforcing material includes, by weight, acomponent A including 88-90 parts of cement, 40-45 parts of sand, and 40-45 parts of water; and a component B including 10-12 parts of fluorocarbon resin, 5-10 parts of epoxy resin / steel fiber mixturemicrocapsules, and 0.01-0.03 parts of urotropine, wherein the external wall of the epoxy resin / steel fiber mixture microcapsules is a urea-melamine-formaldehyde resin copolymer. When the component Aand the component B are mixed, the sand can damage the capsule walls of the epoxy resin / steel fiber mixture microcapsules, so that epoxy resin and steel fibers are dispersed and released and are mixedwith the component A so as to increase the structural strength of the component A after spray coating. The reinforcing material has high structural strength during use.

Description

technical field [0001] The invention relates to the field of tunnels, in particular to a reinforcement material for the inner surface of a tunnel, a preparation method and a reinforcement method. Background technique [0002] With the rapid development of the country's economy, road and tunnel construction, especially subway projects in big cities, are also booming. In the vigorous development of highways and tunnels, there are still some technical problems to be solved, such as the problem of vehicle jumping at the bridge head in the soft ground section, the slope stability of high-fill embankments, the problem of freezing and thawing slopes in severe cold areas, and the problem of tunnels Engineering maintenance and filling, etc. To overcome technical difficulties, we must rely on scientific and technological progress and adopt advanced technologies, including the application of new materials. In recent years, cellular lightweight concrete has been paid more and more att...

AI Technical Summary

Problems solved by technology

[0003] But the water-repellent problem of air-bubble lightweight concrete has not been really solved so far, and the bubble stability problem of air-bubble lightweight concrete limits the construction, especially in the process of pouring and pipeline transportation, the loss of air bubbles in the concrete is greater, and at the same time In order to make the mortar have better water repellency, a certain amount of water repellent must be added, but some additives, such as emulsifiers, are added to the commonly used water repellent at present, which is not conducive to the stability of air bubbles.

Images