Prefabricated steel pipe column applied to roof system, pouring method of prefabricated steel pipe column and concrete
A steel pipe column and prefabricated steel technology, which is applied in the direction of columns, pier columns, pillars, etc., can solve the problems of separation of concrete and steel pipe column walls, difficulty in concrete vibrating and compacting, and large hoisting height, so as to achieve sufficient compactness and self-vibration Good pounding effect, no separation effect
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Embodiment 1
[0034] This embodiment 1 provides a prefabricated steel pipe column applied to a roof system, such as Figure 1 to Figure 4 As shown, it includes a steel pipe column body 1, with a plurality of ring plates 3 in sequence along the inner length direction of the steel pipe column body 1, and also includes a string pipe 2;
[0035] The lower end of the string pipe 2 extends into the steel pipe column body 1 and is fixedly connected with the steel pipe column body 1; the lower end of the string pipe 2 is located at the bottom ring plate 3 of the steel pipe column body 1 and the steel pipe Between the bottom of the column body 1 ; the upper end of the string pipe 2 protrudes outside the upper end of the steel pipe column body 1 .
[0036]Compared with the prior art, because the depth of the steel tube column is too large and there are multiple steel structure ring plates 3 inside, it is very difficult to vibrate and compact the concrete during the concrete pouring process, and it ex...
Embodiment 2
[0045] Embodiment 2 is further optimized on the basis of Embodiment 1, and provides a method for pouring a prefabricated steel pipe column applied to a roof system, comprising the following steps:
[0046] S1: Prepare the steel pipe column body 1 and the self-compacting concrete according to the pouring threshold height; if the height of the steel pipe column body 1 is greater than the threshold height, install the string pipe 2 in the steel pipe column body 1, and perform step S2;
[0047] S2: pour the pump pipe from the top of the string pipe 2 to the inside of the string pipe 2 to form self-compacting concrete to form backflow until the top of the string pipe 2 cannot be unloaded;
[0048] S3: After the top of the string pipe 2 cannot be unloaded, the pump pipe is extended into the steel pipe column body 1 and the self-compacting concrete is poured directly until the self-compacting concrete is poured to the design elevation;
[0049] S4: When the self-compacting concrete i...
Embodiment 3
[0052] This embodiment 3 is further optimized on the basis of embodiment 2, and provides a kind of self-compacting concrete. The raw material ratio of the self-compacting concrete per cubic meter includes: cement 395kg / m 3 , sand 824kg / m 3 , water reducing agent 12.5kg / m 3 , Expansion agent 30kg / m 3 , fly ash 50kg / m 3 , mineral powder 25kg / m 3 , Microsilica fume 30kg / m 3 and remaining water.
[0053] When preparing self-compacting concrete, in order to ensure that the concrete is full and dense and reduce thermal expansion and contraction, the following requirements must be met:
[0054] 1. The compressive strength of concrete is not less than 50MPA, which meets the design requirements.
[0055] 2. The limited expansion rate of the tested concrete deformation performance in water for 14 days should be greater than 3.0 × 10 -4 ; At the same time, the total shrinkage rate of concrete under the same curing conditions should be less than 2.8×10 -4 ;
[0056] The concrete ...
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Abstract
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