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

A fiber-reinforced concrete and polypropylene fiber technology, which is applied in earthwork drilling, shaft equipment, wellbore lining, etc., can solve the problems that the components cannot achieve the expected effect, have no manufacturing method, and have not noticed, etc., and achieve less investment in molds, The effect of reducing the amount of cement and suppressing the occurrence of cracks

CN110642564BInactive Publication Date: 2021-09-24CHONGQING UNIV +2
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2021-09-24
Estimated Expiration
Not applicable · inactive patent

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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.
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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 ...

Examples

Embodiment 1

[0062] Embodiment one, for concrete for jacking pipe, it must Higher strength, better crack resistance ; At the same time, during construction, it must withstand high-frequency vibration, Therefore, it must have better cohesion to concrete .

[0063] Therefore, the application carried out when researching the mix ratio:

[0064] 1) Axial compression test of fiber reinforced concrete;

[0065] 2) axial tension test of fiber reinforced concrete;

[0066] 3) Three-point test: comparison of load-displacement curves of pipe joints, crack propagation process of pipe joints, and post-crack strength analysis.

[0067] The cohesion of the concrete used for mandrel vibration is extremely important. The selection of concrete materials and the mix ratio should be based on the improvement of the cohesion of the concrete as the main performance requirement. It has the advantages of high stability, easy forming of the nozzle and good compactness, and no water after the nozzle is rolled...