Concrete preform for underground engineering and production method thereof

Abstract

The invention provides a concrete prefabricated product for underground space construction. The concrete prefabricated product comprises a reinforcement cage and concrete, wherein the reinforcement cage comprises longitudinal reinforcements subjected to longitudinal force and transverse reinforcements subjected to shear force, the transverse reinforcements are spirally fixed on the longitudinal reinforcements, the two ends of the reinforcement cage are respectively provided with a metal end plate, each metal end plate is provided with taper holes and screw holes, and an aqueduct is formed between each taper hole and the corresponding screw hole; and the longitudinal reinforcements are arranged in the taper holes and connected with the metal end plates, the two ends of a pile body of the concrete prefabricated product are not provided with hoops, and the metal end plates are directly connected with the two ends of the pile body. Because the two ends of the pile body of the concrete prefabricated product are not provided with the hoops, the production efficiency is high, the production cost is lowered, and environment pollution is alleviated.

Description

technical field [0001] The invention relates to the field of concrete prefabricated products, in particular to a concrete prefabricated product used in underground space engineering construction and a production method thereof. Background technique [0002] As factory prefabricated building concrete components, currently 90% are tubular piles, 3% are hollow square piles, 5% are solid square piles, and 2% are other prefabricated piles. [0003] Such as figure 1 As shown, the above pile materials are all made of high-strength steel reinforcement cage 1' combined with concrete 2' to form a composite body. In the prior art, the reinforcement cage 1' is connected with the end plates 3' and hoops 4' at both ends of the pile body. The ferrule 4' is set on the end plate 3', and is used to fix the end plate 3' on both ends of the pile body. At the same time, in the process of pile making, the ferrule 4' can prevent the grout from flowing out of the pile body during the centrifugati...

AI Technical Summary

Problems solved by technology

However, the use of hoop 4' will make it very difficult in the pile-making process, especially when the end plate 3' is installed on the reinforcement cage. The metal end plate 3' is not easy to align with the longitudinal reinforcement of the reinforcement cage, and it is difficult to operate and Affect work efficiency

And ferrule 4 ' is all made of metal, the use of ferrule 4 ' will increase steel consumption, increases production cost

At the same time, at both ends of the pile head during the production process, due to the insufficient combination of the collar 4' and the end plate 3', grout leakage is prone to occur, and there are many cavities, and the pile head is easily broken during the construction process.

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