Prefabricated assembled steel-concrete composite structure pipeline and manufacturing method thereof

Abstract

The invention discloses a prefabricated assembled steel-concrete composite structure pipeline and a manufacturing method thereof. The pipeline comprises a pipe body formed by assembling unit sheets with radians in the circumferential direction; the adjacent unit sheets are connected through side flanges, and the head end and the tail end of each unit sheet are each provided with an end face flange matched with the unit sheet in section shape; meanwhile, the surfaces of the unit sheets extend outwards to form protruding ribs consistent with the unit sheets in radian, grooves are formed by the unit sheets and the protruding ribs, and blocking steel strips are arranged; cavities are formed by the grooves and the blocking steel strips and filled with concrete. Due to the fact that the steel pipeline is formed by assembling the unit sheets, the unit sheets can be transported in a stacked mode, the transportation expense is reduced, and the construction period is shortened; bolt holes and bolts do not exist in the pipe body, and safety is improved; a flushing-preventing metal layer is arranged at the inner bottom of the pipeline, corrosion resistance and abrasion resistance are improved, and therefore the service life is prolonged; the adaptability to deformation of the pipe body is good, and steel pipeline damage caused by differential settlement of a foundation can be avoided.

Description

technical field [0001] The invention discloses a steel pipe and a manufacturing method thereof, in particular to a prefabricated assembled steel-concrete composite structure pipe and a manufacturing method thereof. Background technique [0002] Existing pipelines are generally divided into steel pipes, concrete pipes, organic non-metallic pipes, and corrugated steel pipes. When the diameter of the above pipeline exceeds 2.5 meters, it belongs to the transportation limit. The diameter of the steel pipe is generally the largest and can only reach 3 meters. The maximum diameter of the national standard is 2.4 meters, and the pipe wall is very thick, reaching a thickness of 18mm to 25mm, and the cost is high. Concrete pipes are very heavy, about 10 times that of steel pipes. Therefore, the bottom of the pipes needs to be standardized or the foundation needs special treatment, and the length of each section is only about 2 meters. Plus, concrete pipes are rigid, so they're pro...

AI Technical Summary

Problems solved by technology

It is used in highway culverts and municipal drainage, and the response is good. At the same time, this steel pipe has exposed some defects: (1) There are ripples inside the pipe body, and the flow resistance is large

Therefore, the diameter of the primary pipe has to be increased during design; (2) due to the existence of corrugations, it is easy to accumulate silt, which makes it difficult to desilt in the later stage; (3) the inner wall is covered with axial and circumferential bolt holes, causing leakage It is an engineering problem; (4), bolts and plates are easy to be stolen; (5), the circumferential joint bolts are subjected to shear force, which is a stress concentration area and an unsafe factor; (6), the pipe body must be hot-dip galvanized Anti-corrosion, high cost and polluting the environment; (7), the water-facing surface of the inner corrugation of the pipe body is easy to be washed, worn and the anti-corrosion layer will fall off; (8), the pipe body is too flexible, and it is easy to deform in the circumferential and axial directions; (9) ), there are too many circumferential and axial joints, the sealing performance and the overall strength of the pipe body are reduced; (10), the installation requirements are too high, and it is difficult to meet the design requirements; (11), the manufacturing accuracy is difficult to control

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