Novel highly-efficiency, energy-saving and environmentally-friendly method and system for manufacturing centrifugal concrete pile

Abstract

The invention discloses a novel highly-efficiency, energy-saving and environmentally-friendly method and a novel highly-efficiency, energy-saving and environmentally-friendly device for manufacturing a centrifugal concrete pile. The production process comprises the following: a step 1, processing a pile-shaped end plate according to national standards and requirements of a picture set; a step 2, producing two branched piles or square piles by using one die; a step 3, manufacturing two end plates with bolt holes at positions symmetrical to bolt holes in the picture set; and a step 4, cutting a part of each of four angles of a connection plate of a square pile hoop and the end plates. The method and device have the advantages that: slurry is not leaked during centrifugation; and the quality of the concrete pipe is not affected. Moreover, compared with the prior art, the method and the system have the advantages of simple pile manufacturing process, low cost, environment protection and waste recycling.

Description

technical field [0001] The invention relates to a method and a device for centrifugally manufacturing various pile types with a long mold of more than 20 meters. Background technique [0002] Various types of centrifugal concrete piles are often used in foundation engineering, and the existing manufacturing methods of centrifugal concrete piles can only be applied to steel molds less than 15 meters long, and can only manufacture a standard-length centrifugal concrete pile. According to the patent No. The prestressed high-strength concrete square pile described in 200710068545.6 is also a simple evolution of the general-purpose tubular pile centrifugal process. The above-mentioned common process has many internal defects, such as the pile body often hangs grout, exposed rocks, and residual grout remains in the pile hole, and the main reinforcement is biased. Fatal problems such as insufficient density, serious inner layering, etc. The production efficiency is low, a lot of e...

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Problems solved by technology

[0002] Various types of centrifugal concrete piles are often used in foundation engineering, and the existing manufacturing methods of centrifugal concrete piles can only be applied to steel molds less than 15 meters long, and can only manufacture a standard-length centrifugal concrete pile. According to the patent No. The prestressed high-strength concrete square pile described in 200710068545.6 is also a simple evolution of the general-purpose tubular pile centrifugal process. The above-mentioned common process has many internal defects, such as the pile body often hangs grout, exposed rocks, and residual grout remains in the pile hole, and the main reinforcement is biased. Fatal problems such as insufficient density, serious inner layering, etc.

The production efficiency is low, a lot of energy is wasted, and the process production line occupies a lot of land, which does not conform to the national industrial development policy, and the labor intensity of the workers is high and unsafe

[0003] In the production of pre-tensioned prestressed concrete pipe piles, in order to produce two short piles with one mold, the factory will use the intermediate joints of pipe piles; the ordinary intermediate joints need to be manually disassembled when the tensioning connecting bolts are installed, which is efficient Low and increase the labor intensity of workers

[0004] The special spreader for centrifugal concrete pile long formwork (more than 15M mold) belongs to a kind of lifting device for centrifugal concrete pile formwork. The shortcomings of the long formwork spreader on the market are: the movement is not flexible, the load-bearing capacity is not strong; and it cannot be automatically Adjust the balance force of each lifting point

[0006] The existing jackhammer tools on the market do not have a specific jackhammer stand, and the disadvantages when it operates the mold of the centrifugal concrete pile are: inflexible, inconvenient, and low efficiency

During this centrifugation process, due to the high-speed rotation of the centrifuge, the cement slurry is easy to flow out of the mold during centrifugation, causing environmental pollution and affecting the quality of pretensioned prestressed concrete square piles.

[0009] According to the atlas and the national standard, there are some defects in the connection details of the pile hoop and the end plate. When the test rod is pulling the connecting piece, because the test rod cannot ensure that it is 100% parallel to the formwork, the middle pile is connected. The ferrule will inevitably be stuck in the mold and pulled for a certain distance, resulting in deformation of the connector, resulting in the ineffective connection between the connector and the pile body, resulting in grout leakage during centrifugation and affecting the quality of the concrete pipe pile

In addition, the existing pipe pile manufacturing process is complicated, the cost is high, and it is not environmentally friendly, and the waste cannot be recycled.

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