Prestressed cuboid support pile for building foundation pit, manufacturing method thereof and forming die

Abstract

The invention discloses a prestressed cuboid support pile for a building foundation pit, which comprises a reinforcement cage and concrete. Two ends of a pile body are provided with metal end plates connected with the reinforcement cage, the center of the pile body is provided with a circular through hole, the short edges of the pile body bear side and lateral acting forces of the foundation pit,the long edges of the pile body increase the lateral anti-bending moment of the pile body, the ratio of the short edges to the long edges of the pile body is 0.55 to 0.8, preferably 0.6 to 0.7, and the chamfering dimensions R of four corners of the pile body are 10 to 40 millimeters. A manufacturing method adopts the traditional centrifugal forming method or the traditional vibration forming method. A forming die comprises an upper die, a lower die and a lock catch device; the cross sections of cavities of the upper die and the lower die are triangular respectively; the cross section of the cavity of the forming die formed by buckling the upper die and the lower die is rectangular; and four inner corners of the oblong are arc angles with equal radiuses. After the prestressed cuboid support pile, the manufacturing method and the forming die are adopted, the construction period is greatly shortened, the work efficiency is improved, the steel and the concrete are saved by over 20 percent, the production cost is lowered, unnecessary waste is avoided, and the environment pollution is reduced.

Description

Technical field: [0001] The invention relates to a concrete pile and a method for making the concrete pile, in particular to a prestressed cuboid support pile used in building foundation pits, a manufacturing method and a forming mold. Background technique: [0002] The current building foundation pit support piles are in the shape of a cylinder, which is made by pouring in situ. First, the pile holes are drilled around the building foundation pit to be excavated, and then the round steel cage that has been tied is hoisted Put it into the pile hole, and finally put the concrete into the pile hole, and wait until the concrete reaches the strength in the pile hole and then solidify, then the excavation of the building foundation pit can be carried out. The support pile mainly bears the lateral thrust. The support piles made by the current cast-in-place method are not scientifically arranged in a circular cross-section. At the same time, because of the cast-in-place, the reinfo...

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Problems solved by technology

The support pile mainly bears the lateral thrust. The support piles made by the current cast-in-place method are not scientifically arranged in a circular cross-section. At the same time, because of the cast-in-place, the reinforcement cage cannot be prestressed. The effect of the reinforcement Can not get full play, cause a large amount of steel bars and concrete to be wasted, in the process of on-site pouring of support piles, the production cycle is long, produces a large amount of mud, not only pollutes the environment, and, and the processing cost of mud is high, makes the construction project The overall cost of

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