Method for lifting concrete in ultrahigh reducing steel pipe column

Abstract

The invention discloses a method for lifting concrete in an ultrahigh reducing steel pipe column. The method includes the steps of firstly, pumping water, performing pressuring and lifting with the water instead of concrete until the water overflows out of the top of the column, making small holes at the bottom of the column to discharge the water after lifting and pressuring, and soldering the small holes; secondly, lifting at one cubic meter of cement mortar, lifting concrete closely following the cement mortar, making a runner in the front of the cement mortar, and lifting the concrete once. The inner surface of the steel pipe column is lubricated by pumping the water first and making the front runner with the cement mortar, resistance of friction between the concrete and the inner surface of the steel pipe column is reduced greatly, and the concrete following the cement mortar can be lifted smoothly. Therefore, the method allows the concrete in the ultrahigh reducing steel pipe column to be lifted once, construction efficiency is high, and construction quality is guaranteed easily.

Description

technical field [0001] The invention relates to a concrete jacking construction method, in particular to a concrete jacking construction method in a super-high variable-diameter steel pipe column. Background technique [0002] At present, the general height of concrete jacking construction in domestic steel pipe columns is less than 30 meters, and a few ultra-high concrete jacking constructions in steel pipe columns with a height of more than 30 meters mostly use the segmented jacking method, and the success rate of one-time jacking is not high. high. And when concrete is jacked up, the weld seam connecting the steel pipe column and the feed pipe is sometimes torn, causing jacking failure. [0003] See figure 1 and figure 2 , a single steel pipe column in a project has a height of 66 meters and is connected by lining stiffening connecting pipe fittings. The middle section of the lined stiffening connection pipe fitting is a cylindrical section 3, the outer diameter of w...

AI Technical Summary

Problems solved by technology

[0002] At present, the general height of concrete jacking construction in domestic steel pipe columns is less than 30 meters, and a few ultra-high concrete jacking constructions in steel pipe columns with a height of more than 30 meters mostly use the segmented jacking method, and the success rate of one-time jacking is not high. high

And when jacking concrete, the weld connecting the steel pipe column and the feed pipe is sometimes torn, causing jacking failure

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