Multi-hopper pile die for pipe sinking cast-in-place pile and construction method

Abstract

The invention discloses a multi-hopper pile die for a pipe sinking cast-in-place pile. The pile die is provided with two or more than two movable feeding hoppers, each movable feeding hopper is movable, and each feeding hopper consists of three steel plates, wherein one steel plate is positioned on the front side, two steel plates are positioned on the lateral surface, and the steel plates are fixed by welding; the pile die is provided with feeding holes at the positions of the feeding hoppers; the steel plate on the front side is slightly larger than the feeding holes; and the feeding hoppers are uniformly arranged on the pile die, and the distance between the two adjacent feeding hoppers is 2 to 5 meters. The invention also discloses a construction method for the multi-hopper pile die. The construction method comprises the technical steps of: arranging the pile die in place, closing the feeding hoppers, sinking the pile die, opening the first feeding hopper, pouring concrete, upwards pulling the pile die, opening the next feeding hopper, pouring the concrete, and repeating the processes till the pile die is completely pulled out. The method is simple to implement; and by the method, the construction efficiency is improved, energy is saved, and the pile forming quality is ensured.

Description

technical field [0001] The invention belongs to the technical field of civil construction engineering, and in particular relates to a multi-hopper pile formwork and a construction method for an immersed tube grouting pile. Background technique [0002] my country has a vast territory, and soft soil is widely distributed. There are many complex soft soil foundations in the coastal areas, especially in the Yangtze River Delta. The construction of roads, railways, bridges, etc. in soft soil areas requires reinforcement of soft soil foundations, and pile foundations and their composite foundation technology are the most widely used foundation treatment technologies. 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 a pile tip with reinforced concrete or a steel pipe with a valve-type pile shoe into the soil. In the process, the pile hole is formed, and then ...

AI Technical Summary

Problems solved by technology

At present, this traditional method of pouring concrete with a single fixed feed hopper has the following disadvantages: the position of the feed hopper 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 it is almost completely pulled out, the height of the feed hopper from the ground is often 20~30m, and the concrete must be transported to a height of 20~30m at this time, so the energy for transporting concrete is wasted, time is wasted, operation is inconvenient, and construction efficiency is low , and the concrete is easy to lose during transportation

In addition, concrete falling from a very high position increases the possibility of segregation and reduces the quality of concrete; concrete falling from a high place has a certain impact energy, which increases the lateral extrusion force of the concrete in the pile hole. Increased fill factor, wasting material

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