Concrete placing construction method for steel pipe column core in reverse construction method of basement

Abstract

The invention discloses a concrete placing construction method for a steel pipe column core in a reverse construction method of a basement. The method includes the following steps: a, hanging a guide tube into a steel pipe column to be placed vertically; b, when the distance between the top of the guide tube and the opening of the steel pipe column reaches a preset distance, fixing the guide tube at the opening of the steel pipe column temporarily through a fixing device; c, hoisting a hopper vertically and connecting the hopper with the top of the guide tube; d, removing the fixing device; and e, adding concrete into the hopper and starting placing, and simultaneously drawing the guide tube up and down by a crane so as to compact the concrete. An underwater concrete placing principle is adopted for the method, the drawing of the guide tube is used for compaction of the concrete, therefore the cost is saved, and the concrete placing quality is guaranteed.

Description

technical field [0001] The invention relates to a concrete pouring construction method, in particular to a concrete pouring construction method for a steel pipe column core in a basement. Background technique [0002] With the rapid development of my country's construction industry, the reverse method construction of high-rise and super high-rise building basements has gradually increased, which has become a trend in the future. Factors such as the difficulty of the column core concrete pouring method will directly affect the construction quality of the permanent structural steel pipe column concrete. At present, there are two common concrete pouring construction methods as follows. [0003] Option 1: Using conventional concrete pouring method (jacking method) [0004] Open holes at the bottom of the steel pipe concrete column and weld the concrete delivery pipe with a one-way valve, and use the pressure of the concrete pump to squeeze the self-compacting concrete from botto...

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Problems solved by technology

[0006] Using this method to pour concrete, the machinery and equipment used are simple, and the site requirements are low. At the same time, the quality of concrete pouring can be effectively guaranteed. However, self-compacting concrete is used for pouring, but the price difference between self-compacting concrete and ordinary concrete is as high as 170 yuan / m 3 , adopting this method of construction will greatly increase the project cost

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