Expanded-base prestressed composite anchor cable uplift pile, preparation method and equipment

Abstract

The invention discloses an expanded-base prestressed composite anchor cable uplift pile and a preparation method and equipment, the expanded-base prestressed composite anchor cable uplift pile comprises a main rod, the outer side of the main rod is uniformly sleeved with lantern rings, connecting rods are uniformly mounted on the outer sides of the lantern rings, and round steel bars are jointly mounted at the ends, away from the lantern rings, of the connecting rods; straight steel bars and prestressed steel strands are jointly and evenly installed on the inner sides of the multiple sets of round steel bars. After an uplift pile reinforcement cage is placed in a hole in the ground, the positions of round steel bars and straight steel bars are fixed, a main rod is controlled to descend, four sets of first telescopic rods gradually push away adjacent arc-shaped baffles after being shortened by a certain length, and when the arc-shaped baffles are unfolded, bottom expanding equipment of the arc-shaped baffles is extruded outwards to form a bottom expanding reinforcement cage; the pile body at the bottom expanding part is filled with the arc-shaped baffles, so that the arc-shaped baffles can be better attached to the pile body to reinforce the expanding head to enable the expanding head to have enough strength, and the expanding head stably provides upward resistance for the whole uplift pile. And pre-stress post-tensioning is conducted after construction is completed.

Description

technical field [0001] The invention relates to the technical field of construction engineering, in particular to a bottom-expanded prestressed composite anchor cable uplift pile, a preparation method and equipment. Background technique [0002] Anti-uplift piles are widely used in large-scale basement anti-floating, high-rise building anti-uplift, offshore dock platform uplift, suspension bridge and cable-stayed bridge anchor pile foundation, large dock floor pile foundation and static load test pile anchor pile foundation, etc. , The main mechanism of the anti-uplift pile is to rely on the friction between the pile body and the soil layer to resist the axial tension, such as anchor piles and anti-floating piles. [0003] The patent of the comparative document authorization announcement number CN108374413B discloses an uplift pile and its manufacturing method. In this patent, an openable shovel is arranged on the outer side wall of the pile to improve the bearing capacity o...

AI Technical Summary

Problems solved by technology

[0004] 1. Although the bearing capacity of the uplift pile can be improved by setting the shovel in the comparison document, when the pile is put into the drilled vertical hole, the outer side of the shovel will be in close contact with the inner wall of the vertical hole , which will make the shovels unable to fully unfold and provide resistance to the pile body when the pile body is subjected to an upward force, which will greatly reduce the bearing capacity of the pile body;

[0005] 2. The bottom of the pile body in the comparison document is not equipped with any structure to improve its anti-floating ability. It is very limited to improve the anti-floating ability of the pile body only by setting shovels, and it is impossible to further improve the overall anti-floating ability of the uplift pile;

[0006] 3. At the same time, after placing the reinforcement cage used for the production of the current uplift pile in the vertical hole, if it is necessary to adjust the position of the reinforcement cage in the hole, a large crane is required to lift it, and it is difficult for the driver of the large crane to lift it. Precise control of the position of the reinforcement cage may affect the quality of the uplift pile after casting

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