Prestressing force square pile precast pile tip and its processing method

Abstract

The invention relates to the architecture field and relates to a preformed pile point for a prestressed square pile, wherein, anchor bars are matched with and welded on the inner circumference of the steel point; the outer layers of the anchor bars are bound and fastened by annular spirally reinforced columns; and prestressing tendon hole sites are preserved on a placing concrete body. The preformed pile point for the prestressed square pile has an unique structural shape; the prestressing tendon hole sites are preserved on concrete body; the pile point is integrated into a whole with the square pile; the bearing capacity of a pile point part is improved; and the pile point is difficult to break and maintains the same service life with the pile. The method for producing the pile point changes side concrete placement into concrete placement in the vertical direction, thereby the placement is convenient and dense without pore space due to primary concrete vibrating. Moreover, the methodguarantees the product quality, saves the labor and a great number of steel products, and is safe and reliable; the pile point is dense, has no crack, has high strength and impact resistance and strong penetration factor; and the durability and the crack resistance of the square pile are improved.

Description

1. Technical field: [0001] The invention relates to the field of building construction pile foundations, in particular to a pile tip construction method. 2. Background technology: [0002] In the pile foundation engineering of industrial and civil buildings, ordinary reinforced concrete pile tips have more than enough toughness but insufficient strength, and poor impact resistance. conditions of rock-socketed piles. The depth of the full section of the pile entering the bedrock should not be less than 1 times the diameter of the pile. Ordinary prestressed end-bearing pile tips, although a higher reinforcement ratio is adopted to increase the strength, cracks and damages will inevitably occur during use, and the amount of steel reinforcement is large, which increases the production cost of the pile and reduces the economic benefits of the enterprise. When pouring, the concrete is not easy to enter the steel cage, and the vibration is not solid, which not only takes a lot of...

AI Technical Summary

Problems solved by technology

Ordinary prestressed end-bearing pile tips, although a higher reinforcement ratio is adopted to increase the strength, cracks and damages will inevitably occur during use, and the amount of steel reinforcement is large, which increases the production cost of the pile and reduces the economic benefits of the enterprise. When pouring, the concrete is not easy to enter the steel cage, and the vibration is not solid, which not only takes a lot of time and labor, but also increases the difficulty of construction, and the gas that cannot be released forms holes, which seriously affects the quality of the pile tip.

It is difficult for the pile point to be firmly embedded in the rock formation, which not only affects the durability, but also greatly disadvantages the earthquake resistance

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