1.5 预应力钢筋混凝土排水管道施工(外国英语资料).docVIP

1.5 预应力钢筋混凝土排水管道施工 China Construction Budget Network construction software Construction of 1.5 reinforced concrete drainage pipeline 1.5.1 scope of application The utility model is suitable for the construction of the prestressed reinforced concrete drain pipe under the pressure of less than 0.1MPa in the urban engineering. 1.5.2 construction preparation technology preparation The construction drawings of the 1. pre construction, construction organization design and technical work work. 2. before construction, the status of the pipeline structure, the plane position and elevation and the construction pipeline, after verification, will understand and grasp the situation Mark it on the drawing. 3. complete the construction of handover pile and retest work, and retaining piles and encrypted pile point layout. The water pressure test, mortar mix ratio and the optimum compactness test of the 4. pipe joint have been completed. material requirements 1. prestressed concrete pipe (1) the design strength grade of pipe concrete shall not be lower than 40MPa, and the impermeability test of pipe can be checked, the pressure test is qualified, and the anti cracking performance can reach the crack resistance Inspection pressure index requirement. (2) the work surface of socket and socket face is smooth and smooth, and the amount of local concave convex is not more than 2mm. There should be no honeycomb, ash, nicks and peeling, The thickness of the steel protection layer shall not exceed the height of the rubber stop. (3) tube body outer surface should be no reinforcement, hollowing, cracks, peeling honeycomb, scratches and other defects, protective layer shall not have cracks, hollowing, shedding. tube The external surface shall be marked with a factory certificate, indicating the type of pipe, the result of the hydraulic pressure test, the date of manufacture and the factory, and the quality inspection department Signature. 2. interface apron (1) the sealing aprons used in th