Concrete-filled steel tube column needle type concrete pouring construction method

Abstract

The invention provides a concrete-filled steel tube column needle type concrete pouring construction method. The concrete-filled steel tube column needle type concrete pouring construction method includes the following steps that a concrete mixture ratio experiment is conducted, and the concrete mixture ratio which meets the design requirement is acquired; experimental steel tube columns are utilized to conduct a 1:1 concrete pouring experiment, and the minimum pouring height and the maximum pouring height are acquired; steel tube column units are manufactured; the steel tube column units are lifted, welded and installed, and building surface construction is conducted at the same time; after the first steel tube column unit is installed, a concrete pump tube is utilized to pour concrete into the first steel tube column unit through pouring holes and then sequentially pour concrete into the steel tube column units above the first steel tube column unit; concrete pouring construction lags behind construction of corresponding building surfaces, and the corresponding building surfaces are used as operation platforms in the concrete pouring process; when concrete is poured into one steel tube column unit, the pouring hole of the next steel tube column unit is sealed. The concrete-filled steel tube column needle type concrete pouring construction method is reliable and saves time.

Description

technical field [0001] The invention belongs to the field of building construction engineering, and relates to a concrete pouring construction method, in particular to a steel pipe concrete column needle type concrete pouring construction method. Background technique [0002] At present, super high-rise buildings mostly adopt steel-concrete hybrid structure (concrete adopts self-sealing concrete), and the outer frame of the building adopts steel pipe concrete columns, and concrete is poured inside the steel pipe columns. In the prior art, there are two methods for pouring the concrete in the steel pipe column: 1, using a tower crane bucket or a distributing machine for pouring, and 2, using a jacking operation method. [0003] Among them, the pouring method of tower crane bucket or distributing machine needs to be poured on the top of each column, which requires long-term operation time of tower crane and restricts the operation time of other processes (especially steel pip...

AI Technical Summary

Problems solved by technology

[0004] Among them, when the jacking operation method is adopted, due to the super high-rise construction, the pressure of the concrete is continuously increased when the concrete is continuously lifted upwards, which makes it very difficult to choose the required jacking power

At the same time, if the jacking operation stagnates in the middle, it will cause cold concrete joints to appear, so that the upward jacking operation cannot be performed; when there is a quality accident of concrete voids in the middle, a check valve needs to be installed; after each jacking operation, it is necessary to wait for the final setting of the concrete to reach The lifting equipment and check valves can only be removed after the strength level, which requires high equipment

When dismantling the connecting pipe clip of the pouring port and the rubber of the grid valve, it is easy to cause the concrete slurry to spray out and hurt people, especially the eyes; the construction personnel should stand on the side to work, wear goggles, and remove the short pipe after driving in the steel bars. The pipe clip on the steel pipe head, moving the horizontal pipe to carry out the construction of the next steel pipe column, the process is complicated

Images