Steel pipe concrete pile

Abstract

The invention provides a steel pipe concrete pile. The steel pipe concrete pile comprises an outer-layer steel pipe; a spiral rib is fixed on the inner wall of the outer-layer steel pipe; a plurality of circles of rivets are fixed at the circumference of the inner wall of the outer-layer steel pipe; the outer-layer steel pipe is lined with a concrete inner layer, and an end plate is arranged at the end portion of the outer-layer steel pipe; according to the structural design, the biting force of the steel pipe and the concrete comprises three parts, namely the biting force of the spiral rib and the concrete, the anchoring force of the rivet and the concrete and the binding force of the inner wall of the steel pipe and the concrete; the added spiral rib rivet is capable of improving the binding of the concrete and the steel pipe to a large extent, so that the concrete and the steel pipe can be bound firmly and the impact resistance can be enhanced, and in the striking process, the concrete and the steel pipe are not separated from each other. According to experimental verification, after the spiral rib is added and the rivet is arranged, the bending resistance and the shear-bearing capacity of the novel pipe pile are improved by 50%.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a steel pipe concrete pipe pile for a pile foundation in the civil construction industry. Background technique [0002] In my country's current industrial and civil construction engineering pile foundations, a large number of pile foundations using cast-in-situ piles or steel pipe piles are used. However, its scope of application is limited due to long construction period, difficult quality control and high investment cost. It is used in the engineering fields of retaining walls, bridge piers and abutments, viaduct bents, wharf engineering and offshore engineering, etc., which bear horizontal loads, as well as resisting pile-based buildings subjected to wind loads and earthquakes, which cause horizontal loads with high seismic intensity, such as super high-rise buildings. In the field of construction engineering, steel pipe piles are chosen due to the difficulty of co...

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Problems solved by technology

However, the structure of this pipe pile is relatively complicated and the production cost is high.

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