Construction method for concrete macrotype xenotype shell construction body

Abstract

The present invention discloses a method for constructing a concrete large-scale special-shaped shell structure. The method comprises the steps of building a frame body of a mould frame, placing an external mould to a right position and fixing, tying the structural reinforcing steel bars, arranging an internal mold, pouring the concrete, removing the mould and maintaining the surface. The molding of casing is realized by the steps of respectively fixing different modules through the frame body of the mould frame, assembling to a whole, tying structural reinforcing steel bar on the fiberglass external mould, and then pouring the concrete. Additionally, the poured concrete is added with 1-2kg / m<3> polypropylene fiber, and the occurring of early crack of concrete can be effectively prevented. The cement-based water-proofing material is doped to self-cure the later crack of the concrete to obtain the effect of seepage prevention. The invention has the advantages of reasonable design, simple technique, lower cost, high precision and easy realization. The surface of the concrete large-scale special-shaped shell structure is leaded to be smooth and level. A fair-faced concrete effect is obtained. The invention is especially suitable for the preparation of various semi-sphere concrete casings and has excellent social and economic benefit.

Description

1. Technical field: [0001] The invention relates to a construction method of a concrete shell, in particular to a construction method of a concrete large special-shaped thin shell structure. 2. Background technology: [0002] With the development of my country's economic construction, various three-dimensional space concrete large special-shaped thin shell structures have been widely used in public buildings. In particular, the shells of various large balls (ellipsoids, rugby balls, eggshell balls or raindrop balls, etc.) are very popular for their good stress characteristics. Under the premise of the same diameter and force, the wall of the ball shell The thickness is only half of the wall thickness of ordinary cylindrical tanks. Under the premise of a certain material area, the volume of the spherical shell is the largest. In addition, various spherical shells also have beautiful shapes and low wind pressure and snow pressure. However, special-shaped concrete structures s...

AI Technical Summary

Problems solved by technology

In particular, the shells of various large balls (ellipsoids, rugby balls, eggshell balls or raindrop balls, etc.) are very popular for their good stress characteristics. Under the premise of the same diameter and force, the wall of the ball shell The thickness is only half of the wall thickness of ordinary cylindrical tanks. Under the premise of a certain material area, the volume of the spherical shell is the largest. In addition, various spherical shells also have beautiful shapes and low wind pressure and snow pressure. However, special-shaped concrete structures such as large balls have complex shapes, and the construction drawings often only give the control dimensions of the special-shaped concrete structure, but cannot give the spatial coordinates of the external points of the special-shaped concrete structure And control equations, which brings difficulties to formwork production, support and concrete pouring, resulting in expensive production costs, which is not conducive to popularization and implementation

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