Internal strengthening and reinforcing method and strengthening combined structure for PCCP (prestressed concrete cylinder pipes) with broken wires

Abstract

The invention discloses an internal strengthening and reinforcing method for PCCP (prestressed concrete cylinder pipes) with broken wires. The internal strengthening and reinforcing method includes steps of A, preparing DXE elastic materials and carbon fiber sheet materials according to construction designs; B, checking, repairing and flattening the inner surfaces of concrete pipe cores of the PCCP, thoroughly cleaning the repaired inner surfaces of the concrete pipe cores and drying the inner surfaces of the concrete pipe cores. The internal strengthening and reinforcing method for the PCCP with the broken wires has the advantages that characteristics of the various materials are sufficiently utilized, excavation along the outsides of pipelines can be omitted, the construction method is simple, convenient and speedy, the investment can be saved, excellent seepage prevention effects can be realized, the PCCP are good in abrasion resistance, and the internal strengthening and reinforcing method is nontoxic and environmentally friendly and can be used in strengthening and reinforcing construction on pipes with broken wires for drinking water engineering; performance merits of the various materials for a combined structure for strengthening seepage prevention composite linings can be sufficiently played and are optimally combined with one another, composition structures are reasonably matched with one another, and accordingly good effects for integrally structurally strengthening the PCCP with the broken wires can be realized.

Description

technical field [0001] The invention relates to a construction method, in particular to a method for reinforcing the interior of a PCCP broken wire pipe and a reinforced composite structure. Background technique [0002] Prestressed steel cylinder concrete pipe (PCCP) is a composite structure composed of concrete pipe core, steel cylinder, prestressed steel wire and mortar protection layer. Its strength depends on the prestressed steel wire wound on the concrete pipe core. The steel wire is on the pipe core. Produce uniform compressive prestress, which can offset the tensile stress produced by internal pressure and external load. In the process of manufacturing, construction and use, there are many reasons for the damage or corrosion of the steel wire, which causes the steel wire in the PCCP to break. Cracks appear in the concrete pipe core. Once the number of broken wires reaches a critical value, the steel cylinder may yield and be damaged, which will lead to the destruct...

AI Technical Summary

Problems solved by technology

These methods require external excavation along the pipeline and are neither feasible nor economical for urban projects

Moreover, the reinforced composite structure obtained by the above method has high cost, poor anti-seepage effect, poor abrasion resistance, and poor adaptability to deformation.

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