Closed in-column concrete pouring method

Abstract

The invention discloses a closed in-column concrete pouring method. The concrete pouring method comprises the steps that 1, construction preparation is performed; 2, a pile column formwork is built; 3, pipelines are connected; 4, concrete is poured: step 4.1, a concrete base layer is paved on a construction joint surface of a permanent underpinning beam; 4.2, a concrete solid layer is poured; 4.3,vibration is performed, specifically, a lower-layer attached vibrator and an upper-layer attached vibrator are started in sequence while a concrete solid layer is poured; 5, concrete curing is performed; 6, formwork removal operation is performed; and 7, concrete strength of a pile is measured. According to the closed in-column concrete pouring method, concrete is conveyed into a closed pile column formwork through a ground pump and a pump pipe; and concrete in the pile formwork rolls over from bottom to top to fill the pile formwork under the action of a jacking force till that the pile formwork is filled with the concrete, exhausting of the concrete at the top is achieved through the exhaust pipe in a pouring period, and compactness of the concrete at the top is guaranteed.

Description

technical field [0001] The invention relates to the technical field of concrete pouring, in particular to a concrete pouring method in a closed column. Background technique [0002] In the underpinning beam construction project of the bridge pier, after the main structure of the underpass tunnel is completed, the previously cut pier needs to be refilled. [0003] In the prior art, the current concrete pouring method generally enters the warehouse directly from the top of the warehouse, and vibrating rods are directly inserted into the concrete for vibration, and the vibration effect can be directly observed. [0004] For example, the invention patent of Chinese Patent Publication No. CN105986670A discloses a concrete pouring process, which is characterized in that it includes the following process requirements: (1) before pouring concrete, remove surface debris and accumulated water, and first chisel out construction joints The cement mortar film on the surface and the loos...

AI Technical Summary

Problems solved by technology

[0007] The traditional pouring method is the high-throwing type, which enters the warehouse from the top of the column, but due to conditions, it cannot enter the warehouse from the top. Taking the tunnel under the 107 auxiliary road rapid transformation project in Zhengzhou City as an example to illustrate

The underpass tunnel needs to underpin the H9 bridge pier of the Shangding Road ramp at the Shangding Road ramp bridge. According to the design requirements, after the main structure of the underpass tunnel is completed, the previously cut pier needs to be recast. The bridge pier is a 1.5m*1.5m square pier, and the four corners are arcs with a radius of 100mm. In this case, the concrete construction has the following difficulties: 1. The way of concrete storage; due to the limitation of temporary underpinning beams, concrete cannot enter directly from the top Inside the warehouse; 2. The method of pouring and vibrating; the concrete cannot be observed from the outside during the pouring construction process, and the vibrating rod cannot vibrate effectively, especially the density of the concrete at the top is not easy to control; 3. Poor exhaust in the concrete formwork, voids in concrete

[0008] For the existing technology: 1. Due to the limitation of the temporary underpinning beam, the concrete cannot directly enter the warehouse from the upper part; 2. The concrete cannot be observed from the outside during the pouring construction process, and the vibrating rod cannot vibrate effectively, especially The density of the concrete at the top is not easy to control; 3. Poor exhaust in the concrete formwork causes the problem of voids in the concrete, and no effective solution has been proposed yet

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