A kind of coarse polypropylene-basalt hybrid fiber prefabricated dry hard fiber concrete, pipe jacking and manufacturing method

Abstract

The invention relates to a crude polypropylene-basalt hybrid fiber prefabricated dry hard fiber concrete, a pipe jacking, and a manufacturing method, comprising: containing basalt fiber and crude polypropylene fiber in the concrete, wherein the mass ratio of crude polypropylene to basalt is 1 :1~4:1; more preferably, each cubic meter of concrete contains: cement 375kg, sand 850kg, coarse aggregate 545kg, fine aggregate 545kg, coarse polypropylene 4kg, basalt fiber 2kg, water reducer 3.75kg. By adopting the crude polypropylene-basalt hybrid fiber prefabricated dry hard fiber concrete, pipe jacking, and manufacturing method of the present invention, a high-strength pipe jacking with fewer cracks in use can be obtained, and the problem of low pipe jacking production efficiency can be solved.

Description

technical field [0001] The patent of the present invention relates to the field of pipe jacking concrete design and construction, in particular to a prefabricated dry-hard fiber concrete, pipe jacking and manufacturing method of coarse polypropylene-basalt hybrid fiber. Background technique [0002] In recent years, the pipe jacking construction method has many characteristics such as less interference to traffic, little impact on the surrounding construction, no excavation construction, deep underground pipeline laying, and safe crossing of railways and obstacles. It has been widely used in municipal engineering, especially with the emergence of relay relay jacking technology, the pipe jacking method has the ability of large pipe diameter and long-distance jacking operation, and can be applied to long-distance crossing rivers, lakes and ground transportation Laying works of underground pipelines in facilities, etc. However, due to the high brittleness of the concrete pipe ...

AI Technical Summary

Problems solved by technology

The above studies did not notice: coarse polypropylene, fine polypropylene The difference between acrylic concrete for pipe jacking

[0011] Secondly, Coarse polypropylene-basalt hybrid fibers are applied to pipe jacking joints, but there is no related production method so far (The vibration of pipe jacking concrete is different from that of beam and column concrete)

In the process of making fiber concrete, due to the proportioning, adding Due to problems such as adding method and mixing process, agglomeration often occurs, resulting in local defects in concrete, resulting in the production of components Can't achieve expected effect

[0012] Thirdly, the traditional pipe-making process requires manual cloth and manual vibration, and the construction efficiency is low

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