Spherical-segment-shaped dome concrete pouring method

Abstract

The invention aims to provide a spherical-segment-shaped dome concrete pouring method. The method includes the following steps: a, one or more annular areas encircling the vertical center line of a steel arch top are determined on the steel arch top; b. the annular areas are divided into segments in an odd number, concrete pouring starting points for any two segments symmetrical about the verticalcenter line are two first symmetrical positions symmetrical about the vertical center line, and concrete pouring ending points for any two segments symmetrical about the vertical center line are twosecond symmetrical positions symmetrical about the vertical center line; and c, pouring of one annular area is divided into concrete pouring performed on any two segments synchronously in the peripheral direction and in the same direction, so that the outer wall covering the steel arch top and two concrete blocks holding and wrapping a rebar framework are formed in the annular area, and the two concrete blocks are made to be symmetrical about the vertical center line. The concrete blocks at any moment after pouring starts are in a symmetrical distribution state, and therefore it is avoided that stress of the steel arch top is not uniform.

Description

technical field [0001] The invention relates to a concrete pouring method for a spherical dome. Background technique [0002] The concrete pouring of the low-temperature storage tank dome of the existing LNG (Liquefied Natural Gas, liquefied natural gas) receiving station adopts one-time continuous pouring or block and layered pouring, and the continuous operation time is long. For example, a 160,000 cubic meter storage tank The tank dome concrete is about 2,500 cubic meters, and the one-time continuous pouring time is about 72 hours, which is labor-intensive. [0003] The utility model patent CN206016387U discloses a composite roof structure of a large concrete low-temperature storage tank. The tank roof is a spherical dome, which is composed of a steel vault at the bottom and a concrete vault at the top. The steel vault includes a steel arch reticulated shell and a skin plate laid on top of the reticulated shell. The concrete vault is composed of reinforcement and concret...

AI Technical Summary

Problems solved by technology

Such a process can reduce the time for one-time continuous pouring of concrete. However, such a pouring method will lead to uneven stress on the steel vault, which will lead to cracks in the concrete, which will affect other subsequent construction processes and require a lot of manpower and material resources. Concrete cracks, surface curvature and flatness repairs in time and time

Images