Root key construction device of root type cast-in-place pile

Abstract

The invention discloses a root key construction device for a root pouring pile. A hydraulic cylinder is fixed to the position above the center of a base plate. The end portion of a hydraulic rod of the hydraulic cylinder downwards stretches out towards the base plate. A plurality of vertical push rods are evenly distributed on the part, around the hydraulic cylinder, of the base plate. The hydraulic rod is connected with the vertical push rods through a connecting rod mechanism, the vertical push rods move in the radial direction of the base plate, the positions, corresponding to the vertical push rods, of the edge of the upper surface of the base plate are provided with root key limiting devices, and the root key axis points at the axis of the base plate through the root key limiting devices and moves in the radial direction of the base plate. The positions, corresponding to the root key limiting devices, of the bottom of the base plate are rotationally connected with transmission gears, the transmission gears are in transmission connection with respective drive motors, and the transmission gears are in engaged transmission with vertical racks at the tail ends of root keys inserted in the side wall of a pile pit. It can be known from the above structure, the root key construction device for the root pouring pile can construct all root keys on one layer at the same time, automatic ascending in the pile pit can be achieved without the aid of external force so that construction of all the root keys in the pile pit can be finished, and the root key construction efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of root-type cast-in-place pile construction, in particular to a root-key construction device for root-type cast-in-place piles. Background technique [0002] In the field of construction, pile foundations are usually used for bearing pressure, and pile foundations bear pressure through the joint action of pile side resistance and pile end resistance. The bearing capacity of the pile foundation is related to the resistance provided by the pile side and pile end. By increasing the diameter of the pile foundation or the length of the pile foundation, that is, by increasing the stressed area, the pile side resistance or pile end resistance of the pile foundation can be improved. , thereby increasing the bearing capacity of the pile foundation. However, in actual construction, the longer the pile foundation is, the more difficult the construction is; the larger the diameter of the pile foundation, the more buil...

AI Technical Summary

Problems solved by technology

[0004] First, during the entire construction process, hoisting devices are required, resulting in very high construction costs

[0005] Second, the construction is carried out in the hoisting state. Although the suspension rod has been used instead of the suspension rope to improve a certain rigidity, there will still be shaking, which is a great safety hazard during the construction process.

[0006] Third, the part that pushes the root key into the side wall of the pile pit is a slope structure. When the slope structure acts on the root key, it will produce a vertical force at the same time, and push the root key into the side of the pile pit. When the wall is closed, the root key cannot be guaranteed to be jacked horizontally, and the construction quality of the root key cannot be guaranteed

[0007] Fourth, the number of root keys in the same layer is greatly affected by the number of slopes at each angle, and the volume occupied by the slopes is relatively large, resulting in a limited upper limit on the number of slopes

[0008] Fifth, due to the large mention of the slope surface and the need to bear a certain pressure, the weight of the slope surface is relatively large, which increases the load of hoisting, resulting in higher requirements for the load-bearing capacity of the crane required, which further increases the construction cost

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