Novel high-load abnormal-shaped PCCP (prestressed concrete cylinder pipe) and manufacturing method

Abstract

The invention discloses a novel high-load abnormal-shaped PCCP (prestressed concrete cylinder pipe) and a manufacturing method. The improved design is performed on a geometric structure of a pipe bodyin combination with the stress condition in actual application of the pipe body. The thickness of the upper end of the cross section of the pipe body and the pipe wall of the bottom of the pipe bodyis larger than the thickness of the pipe walls of the two sides of the middle of the pipe body, a wide and flat base is disposed at the bottom of the pipe, and the ring stiffness and the top surface bearing capability of the pipe body are greatly improved. The manufacturing method includes the steps that a pipe core is made by means of a traditional PCCP production process, and after wire wrappingof the outer wall of the pipe core is finished, an outer protective layer of the pipe is formed by concrete pouring through a dedicated mold. By means of the novel high-load abnormal-shaped PCCP andthe manufacturing method, resources are saved, eco-environment protection is achieved, construction can be performed in an excavation direct-burial mode or in a non-excavation jacking, running is safeand reliable, the service life is long, especially, conveyed drinking water is not contaminated, the pressure sealing property is good, ultra-large-diameter production is allowed, and the pipe can beused for urban underground pipe galleries and sponge city construction as well as fluid conveying.

Description

[0001] Technical field [0002] The invention relates to a fluid conveying pipeline, in particular to a novel high-load-bearing special-shaped PCCP pipe with high ring stiffness, low carbon and environmental protection, and a manufacturing method thereof. Background technique [0003] At present, the prestressed steel cylinder concrete pipes produced in the domestic and foreign markets, that is, PCCP pipes, have a circular concentric structure. The circumferential force under internal pressure or external pressure is equal. In the actual application process of the pipeline, the actual circumferential force of the pipeline wall is uneven, because in the actual laying construction of the pipeline, in order to ensure that the pipeline will not have settlement in the future operation, especially non-uniform settlement, people Generally, in pipeline construction, a hard bottom plate is made at the bottom of the pipeline, and then the pipeline is placed on the hard bottom plate, so...

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Problems solved by technology

[0004] However, in practical applications, the above-mentioned method of arranging a hard bottom plate at the bottom of the pipeline still has disadvantages, that is, the circumferential force of the hard bottom plate relative to the bottom of the pipeline is almost a point force, and for the whole pipeline The force on the bottom is close to the force on a narrow strip in the center of the bottom. This kind of stress is concentrated on the centerline of the bottom of the pipeline, and it is very easy to cause accidents caused by the extrusion and damage of the laid pipeline by the upper load of the pipeline. In severe cases, it can cause serious damage to the environment, and in severe cases, it will cause heavy losses of people's lives and property.

[0005] In order to avoid the occurrence of the above-mentioned accidents, people often fill rocks and soil on both sides of the center line of the bottom of the circular pipe for compaction in actual construction, or fill the bottom with concrete to widen the bearing area of ​​the bottom of the pipe and improve the overall performance of the pipe. Bearing capacity, due to the non-integral attachment of the filled rock and soil or the sealed concrete to the pipe body, the effective bearing surface of the pipe bottom that can be increased in actual use still cannot meet the requirements, and the above-mentioned piles in actual construction Rock filling or concrete filling is difficult to operate, so that the filling material cannot meet the requirements of increasing the bearing capacity of the bottom of the pipeline

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