Combined box culvert for jacking construction method and making method thereof and raw material thereof

Abstract

The invention relates to a combined box culvert for jacking construction method and a making method thereof and a raw material thereof, which are mainly to solve problems of the traditional box culvert, such as low space utilization rate, unreasonable stress, poor waterproof effect and the like. The combined box culvert comprises a base and a vault, wherein the base comprises a bottom plate and side plates; water-swelling rubber strips are arranged on the side plates; base steel reinforcement frameworks and waterproof steel plates are coated in the base; a vault steel reinforcement framework, a thin steel plate and an anti-cracking steel reinforcement net are arranged in the vault; embedded reinforcements in the side plates are inserted into reserved holes of the vault; a steel socket is formed in the box culvert; a socket rubber ring is arranged at the socket end of the box culvert; and a water-swelling rubber ring is arranged at the plug end of the box culvert. The box culvert is made by using a core mold vibration process. An inorganic anti-mildew coating is coated on the inner wall of the box culvert. The raw material used during making the box culvert is expansive concrete, which is formed by cement, slag powder, sand, stone, water, alunite type composite expansive agent, carbon fiber and early-strength polycarboxylate superplasticizer. The invention has the advantages of reasonable top stress, high space utilization rate and good waterproof effect.

Description

Technical field: [0001] The invention relates to a combined box culvert for a jacking construction method, a manufacturing method and raw materials used therefor. Background technique: [0002] Box culverts refer to culverts built with reinforced concrete box-shaped pipe joints. The box culvert is composed of one or more rectangular sections, generally made of reinforced concrete. The price of prefabricated reinforced concrete box culvert is relatively low, and it is produced in the factory, and the upper and lower parts can be made separately. [0003] The section of the existing box culverts is mostly circular or rectangular. The advantage of the circular shape is that the force on the top is reasonable, it is not easy to crack, and the friction force and resistance are small during jacking construction. The disadvantage is that a bottom plate needs to be added, which increases the cost. The space utilization rate is low; the advantage of the rectangle is that the space i...

AI Technical Summary

Problems solved by technology

[0003] The section of the existing box culverts is mostly circular or rectangular. The advantage of the circular shape is that the force on the top is reasonable, it is not easy to crack, and the friction force and resistance are small during jacking construction. The disadvantage is that a bottom plate needs to be added, which increases the cost. The space utilization rate is low; the advantage of the rectangle is that the space is reasonable and the space utilization rate is high. The disadvantage is that the force is unreasonable, and the friction and resistance are large during jacking construction.

[0004] In addition, the existing box culvert also has the problems of poor waterproof effect and short service life

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