Concrete tube with lining water-absorption expansion plastic sheet

Abstract

The invention relates to a concrete tube with a lining water-absorption expansion plastic sheet. The concrete tube comprises a lining water-absorption expansion plastic sheet and a concrete structurelayer wrapped around the outer side of the lining water-absorption expansion plastic sheet, the lining water-absorption expansion plastic sheet is prepared from two or more layers of high-molecular plastic materials, and is divided into a base body layer and a water-absorption expansion layer, the base body layer is arranged on the inner side, the water absorption expansion layer is arranged on the outer side, and anchoring structures are distributed and arranged on the outer side of the lining water-absorption expansion plastic sheet. The anchoring structures extend into the concrete structure layer, so that the lining water-absorption expansion plastic sheet and the concrete structure layer are firmly combined, and better sealing performance is achieved; and the anchoring structures consist of connecting sections and anchoring sections, the connecting sections are directly connected with the lining water-absorption expansion plastic sheet, and the anchoring sections are directly connected with the connecting sections. Compared with the prior art, the concrete tube has the advantages of being good in sealing effect, long in service life, good in anti-corrosion effect and low in maintenance cost, so that the service life of the concrete tube can be obviously prolonged by 10-20 years.

Description

technical field [0001] The invention relates to a concrete pipe structure, in particular to a concrete pipe lined with a water-absorbing expansion plastic sheet. Background technique [0002] When the concrete pipe is used in the sewer or other corrosive environments, the drainage pipe will be eroded and damaged by corrosive gases such as hydrogen sulfide, which will greatly shorten the service life of the concrete pipe and even cause engineering problems. Therefore, the service life of traditional concrete pipes is short and the maintenance cost is high. At present, in view of the shortcomings of concrete pipes that are not resistant to corrosion, polymer materials are often used as the lining structure to reduce the corrosion of concrete pipes. [0003] Utility model patent CN203721009U has reported " the reinforced concrete drainage pipe of liner PVC sheet ". The patent adopts the concrete pipe as the matrix and nests the PVC liner pipe. T-shaped fixing lugs are evenly...

AI Technical Summary

Problems solved by technology

The PVC lining form described in this patent can protect the concrete pipe body and prevent corrosion, but it also has certain defects, that is, in the later use process, it is impossible to avoid the damage to the pipe body caused by the moisture penetrating between the lining sheet and the concrete pipe. Corrosion, which affects the service life of the pipeline

[0004] According to relevant literature and patent reports, most of the anti-corrosion linings commonly used in the industry are single-layer hydrophobic polymer materials. This kind of material can play a good anti-corrosion effect, but it cannot exclude the moisture entering between the inner lining layer and the concrete structure layer. Over time, the concrete structure layer will also be corroded, which will affect the service life of the pipeline, so it is necessary to carry out relevant technical innovations to deal with the existing problems

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