Method for making spatial multi-curved-surface as-cast finish concrete stay in place formwork by using plywood

Abstract

The invention discloses a method for making a spatial multi-curved-surface as-cast finish concrete stay in place formwork by using plywood. The method comprises the following steps of: (1) establishing a three-dimensional model of a spatial multi-curved-surface as-cast finish concrete structure; (2) simulating concrete force analysis in a computer, computing a back lining keel distance, and arranging a bottom framework; (3) introducing three-dimensional coordinate data of the three-dimensional model into an electronic total station for field lofting, and lofting an arc-shaped locus intersecting with a spatial curved surface; (4) lofting a wood back lining keel according to curves at different height sections of a building drawing; (5) paving curved plywood on the back lining keel for serving as a bottom framework; and (6) paving thin plywood on an opposite surface between the bottom framework and as-cast finish concrete for serving as a panel. The method for making the spatial multi-curved-surface as-cast finish concrete stay in place formwork by using plywood provided by the invention has the advantages of low manufacturing cost, convenience and rapidness for constructing, flat, smooth, attractive surface of the made as-cast finish concrete structure and the like, and has remarkable economic benefit and social benefit.

Description

technical field [0001] The invention relates to a method for manufacturing a building construction formwork, in particular to a method for making a space multi-curved fair-faced concrete structure formwork with wooden splints. Background technique [0002] Formwork is an essential and important tool in the construction of cast-in-place concrete structures. At present, the formwork is mainly made of wood or steel. For the fair-faced concrete structures with multiple curved surfaces in space (such as diving platforms, etc.), steel formwork is usually used due to the complex surface. The steel formwork is mainly composed of four parts: the panel, the longitudinal rib, the transverse rib and the frame. The panel is generally made of 5mm thick steel plate, and the longitudinal rib and transverse rib are generally made of 6mm thick steel plate. The manufacturing method of the steel formwork is as follows (taking the diving platform as an example): For the straight column of the d...

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Problems solved by technology

The use of steel formwork has the following disadvantages: (1) Since the pillars of the diving platform have different sections at different heights with different curvatures, it is necessary to design steel forms with different heights and different curvatures, and the manufacturing cost is very high. After accounting, the production cost of each diving platform is about 100,000 yuan

(2) It is difficult to manufacture and install, and a large amount of processing and lifting equipment is required, and the manufacturing cycle is long; (3) The steel formwork is heavy, and a large amount of supporting steel pipes are used; Combined in small pieces, with many and wide joints, the surface of the fair-faced concrete structure constructed is uneven, smooth and beautiful

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