Pretensioned prestressing steel pipe concrete pipe pile and producing method thereof

Abstract

The invention discloses a pre-tensioning method pre-stressed reinforced concrete tubular pile and a production method thereof. The product of the pre-tensioning method pre-stressed reinforced concrete tubular pile comprises an outer steel pipe, wherein the inside of the steel pipe is lined with an inner concrete layer; the outside on the end part of the tubular pile is provided with an end plate provided with a center hole; and the end plate is fixedly connected with a steel reinforcement cage which is extended into the inner concrete layer. The production method comprises the following steps: the inner surface of the steel pipe is subjected to spraying or slinging treatment, and the outer surface of the steel pipe is subjected to bottom layer coating anticorrosive treatment; the steel reinforcement cage is welded with the end plate provided with the center hole, and the end plate is further welded with the steel pipe; die filling is performed; concrete is poured into the steel pipe by a concrete pump; and pre-tensioning stretching and drawing, centrifugal shaping, constant-pressure vapor curing, extending, demoulding, high-pressure vapor curing, acquisition of the product and so on are performed. The pre-tensioning method pre-stressed reinforced concrete tubular pile is invented on the basis of a pre-stressed concrete tubular pile and a steel pipe pile, not only has the advantages of good comprehensive mechanical property, high stressing capacity, bending capacity, tensile capacity of the pile body, and strong impact resistance but also has low cost and is convenient to produce and use.

Description

Technical field: [0001] The invention relates to a prestressed steel tube concrete pipe pile for a pile foundation in the civil construction industry and a production method thereof. Background technique: [0002] In my country's current industrial and civil construction engineering pile foundations, a large number of prestressed concrete pipe piles or steel pipe piles are used, but because of the mechanical properties and investment costs of prestressed concrete pipe piles or steel pipe piles, etc. use. In the pile foundations of bridges and port projects, some prestressed concrete pipe piles can be used as pile foundations for bearing, but because the bending moment of prestressed concrete pipe piles is small, the bending bearing capacity is weak, and concrete pipe piles Poor penetration ability makes it impossible to enter the rock formation, so instead of choosing prestressed concrete pipe piles, choose steel pipe piles; in the equipment foundation of some projects on la...

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Problems solved by technology

[0002] In my country's current industrial and civil construction engineering pile foundations, a large number of prestressed concrete pipe piles or steel pipe piles are used, but because of the mechanical properties and investment costs of prestressed concrete pipe piles or steel pipe piles, etc. use

In the pile foundations of bridges and port projects, some prestressed concrete pipe piles can be used as pile foundations for bearing, but because the bending moment of prestressed concrete pipe piles is small, the bending bearing capacity is weak, and concrete pipe piles Poor penetration ability makes it impossible to enter the rock formation, so instead of choosing prestressed concrete pipe piles, choose steel pipe piles; in the equipment foundation of some projects on land, the requirements for the bearing capacity of piles are not high, so prestressed concrete pipe piles or thin-walled steel pipe piles are used The pile foundations used for load-bearing can meet the requirements of bearing capacity, but the quality requirements for pile sinking are relatively high, so the driving resistance of piles cannot be satisfied, and steel pipe piles must be selected; steel pipe piles are selected for the above two cases, Although it meets the engineering requirements, it causes a substantial increase in engineering costs

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