Tube-sinking cast-in-site pile combined feeding hopper pile and construction method

Abstract

The invention relates to a tube-sinking cast-in-site pile combined feeding hopper pile and a construction method. A plurality of feeding ports are formed in a side face of a pile mold from top to bottom. Each feeding port is connected with and sealed by a cover plate. The tube-sinking cast-in-site pile combined feeding hopper pile and the construction method solve the problems that concrete must be delivered to a place with the height of 20m to 30m and therefore energy is wasted in delivery of the concrete, time is consumed, the concrete falls from the high place so that isolation is increased, pile forming quality is influenced, a foundation at the lower side is separated from the pile mold, unsafe factors occurs and the like in the prior art. Due to the fact that the feeding ports are close to the ground, the concrete can be poured directly to a feeding hopper on the ground, the concrete is not required to be delivered to the high place, a winch is not needed, the energy is saved, and operation is convenient. Each arc-shaped cover plate with the same radius as the pile mold enables an outer wall of the pile mold to be in a complete circular shape, concrete falling height is reduced, possibility of the isolation is decreased and pile forming quality is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of civil construction engineering, and in particular relates to a pile formwork and a construction method for a combined feeding hopper of an immersed tube grouting pile. Background technique [0002] Immersed tube pile is a commonly used pile foundation technology in civil engineering. It uses hammering pile driving equipment or vibrating pile driving equipment to sink steel pipes with prefabricated reinforced concrete pile tips or valve-type pile shoes into the soil. In the process, the pile hole is formed, and then the reinforced skeleton is put in and the concrete is poured through the fixed feeding hopper set on the pile formwork, and the concrete is poured while the pipe is pulled out while vibrating, and the concrete is compacted by the vibration during the pipe pulling, and the required concrete is formed. cast-in-place piles. [0003] Before the present invention, circular sinking pipe pouring pile...

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Problems solved by technology

[0004] (1) The feed hopper is fixed to the pile formwork, and its position gradually rises as the pile formwork is pulled out, so that the concrete must be transported to the height of the feed hopper when the concrete is poured. When the pile formwork is almost completely pulled out, the feed hopper The height from the ground is often 20-30m. At this time, the concrete must be transported to a height of 20-30m, so the energy of transporting the concrete is wasted. This part of the cost accounts for a considerable proportion, which is fatal for engineering construction. At the same time, it is time-consuming and inconvenient to operate, and the concrete is easy to be lost during transportation

[0005] (2) Concrete falls from a very high position, which increases the possibility of segregation, reduces the quality of concrete, and seriously affects the quality of piles

[0006] (3) The concrete falling from a high place has a certain impact energy, which increases the lateral extrusion force of the concrete that has been poured into the foundation, because at this time the foundation below has been separated from the pile form, making the concrete flow toward the pile hole The surrounding soil is squeezed and deformed, which increases the filling coefficient, affects the quality of the pile, and wastes materials

[0007] (4) The concrete is hoisted to a very high height, which increases the unsafe factors of construction and is prone to collapse accidents

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