A method for vertically producing precast concrete box culverts

Abstract

A vertical method for producing prefabricated concrete box culverts relates to the field of prefabricated concrete member production, in particular to a method for vertically producing prefabricated concrete box culverts. It is mainly invented to solve the problem that the quality of the precast concrete box culvert produced by the vertical method cannot be guaranteed. The following production process is adopted: assemble the mold, put the steel skeleton into the mold; pour concrete into the mold, and the concrete does not fill the entire socket. The concrete is poured and vibrated in layers. When pouring the last layer of concrete, place galvanized iron sheets or Glass plate; After the vibration is completed, press a circle of glass strips or square steel on the upper surface of the concrete at the socket. Two hanging holes are respectively arranged on the two side panels of the box culvert. Use steam curing. After the box culvert is cured, lift the health cover, cool down, and use self-leveling material along the socket to fill the previously reserved height space. The advantage is that the quality of the precast concrete box culvert produced is good.

Description

Technical field: [0001] The invention relates to the production field of prefabricated concrete components, in particular to a method for vertically producing prefabricated concrete box culverts. Background technique: [0002] At present, the quality of precast concrete box culverts produced by the vertical method cannot be guaranteed, and there are serious defects, which cause problems when users install them on site. The specific questions are as follows: [0003] 1. The flatness of the socket is too poor, forming a wave shape, and there are many rough surfaces and moiré. The existing repairing method is to smooth the socket with a machine tool after the box culvert is steamed, and then paint it with epoxy resin, but the material cost is high, labor and time-consuming, dusty and polluted. [0004] 2. The hoisting holes of the existing box culvert are designed to be at least six holes, which is not conducive to the overall strength of the box culvert, and the hoisting hol...

AI Technical Summary

Problems solved by technology

The existing repair method is to use a machine to smooth the socket after the box culvert is steamed, and then paint it with epoxy resin, but the cost of materials is high, labor-intensive, time-consuming, dusty and polluting

[0004] 2. The hoisting holes of the existing box culvert are designed to be at least six holes, which is not conducive to the overall strength of the box culvert, and the hoisting holes must be blocked with quick-setting expansive concrete, and a lot of reinforcement steel bars need to be used near the hoisting holes, which is wasteful and time-consuming strenuous

[0005] 3. After the box culvert is steamed and cured, there is a problem of cracking on the ring surface of the socket, most of which are opposite seams. After the installation of the box culvert is completed, water will leak along the opposite seams

The other is to brush epoxy resin on the cracks of the socket ring surface after the box culvert is steamed, which increases the production cost

[0006] 4. A set of molds can only be turned around once in 24 hours. When the construction period is tight, a large number of box culverts are needed every day, so the number of molds can only be increased. The price of each set of three-storey box culvert molds is more than 400,000 yuan, which increases the cost of box culverts. Cost of production