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Processing method of pre-stressed concrete reinforced pile

A technology of concrete reinforcement and processing methods, which is applied in the direction of sheet pile walls, manufacturing tools, and infrastructure engineering, etc., can solve the problems of shortening the service life of reinforced piles, cracks, etc., and achieve the effects of improving shear resistance, increasing strength, and saving costs

Inactive Publication Date: 2017-01-04
重庆市晟庄建材有限责任公司
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0003] In the design of construction engineering, it is difficult for prefabricated ordinary concrete reinforced piles to achieve relatively high tensile stress. During the process of sinking piles into the soil, prefabricated piles often have cracks. After long-term use, due to water seepage and erosion of harmful substances, it will be greatly Shortened service life of reinforced piles

Method used

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  • Processing method of pre-stressed concrete reinforced pile
  • Processing method of pre-stressed concrete reinforced pile

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Prepare a prestressed high-strength concrete reinforcement cage, which is manufactured according to the following steps.

[0025] First prepare the reinforcement cage of the overall structure, that is, first make the outer ring stirrup 1 according to the set specifications, and install two reversely staggered regular triangle frames 2 in the outer ring stirrup 1; then connect the outer ring stirrup 1 and the regular triangle The top contact 3 of the frame 2 and the intersection point 4 of the side and the side of the equilateral triangle frame 2 are welded or bound, and the binding steel wire is reserved to make a high-strength stirrup 5; then a plurality of high-strength stirrups 5 are taken, and Bind the main reinforcement 6 on the reserved binding steel wire until each reserved binding steel wire is bound; layer reinforcement cage 7; then the inner ring stirrup 8 is installed on the main reinforcement 6 bound on the intersecting point 4 inside the outer layer reinfor...

Embodiment 2

[0030] Preparation of steel rods for prestressed concrete.

[0031] The weight percentage of the chemical composition used is: carbon 0.38%, silicon 0.45%, manganese 0.72%, chromium 0.75%, molybdenum 0.32%, tungsten 0.45%, copper 0.15%, phosphorus 0.015%, sulfur 0.013%, lanthanide rare earth 0.12% , Residual elements 0-0.05%, the balance is iron; the mass percentage of lanthanide rare earth components is lanthanum 17%, cerium 23.5%, praseodymium 24.5%, neodymium 18%, dysprosium 13.5%, and the remaining lanthanide elements 3.5%.

[0032] Its preparation method is.

[0033] ① Smelt and roll into steel rods in steel mills according to weight percentage.

[0034] ② Send the rolled steel bar into the induction heating furnace to heat to 976°C, and keep the heating temperature for 5 minutes.

[0035] ③The steel bar after induction heating is directly quenched with quenching liquid, the quenching cooling rate is controlled at 209°C / s, and the quenching cooling time is 17s, so that ...

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Abstract

A processing method of a pre-stressed concrete reinforced pile comprises the following steps: firstly, preparing a reinforcement cage which adopts an integral structure with both an inner-layer reinforcement cage and an outer-side reinforcement cage, wherein the reinforcement cage takes high-strength stirrups as the basis and is supported by mutually staggered regularly triangular racks; a steel mould of a reinforced pile is filled with high-strength concrete, the high-strength concrete is subjected to curing molding to obtain the end product of the pre-stressed concrete reinforced pile. The processing method has the following beneficial effects: the stability of the triangles enhances the strength of the reinforcement cage; the regular triangles can guarantee uniform space between main ribs; the strength of the processed and manufactured reinforcement cage can be structurally improved greatly; in addition, pre-stressed concrete steel bars which are manufactured through special formulas and machining process have the strength exceeding 2,000 MPa and the ductility higher than 7%, and also have good drawability and delayed fracture prevention characteristic, and therefore, the shearing, bending and cracking resistance are greatly improved; the preparation cost is only that of the 1,420 MPa pre-stressed concrete steel bars, so that the cost is greatly lowered.

Description

technical field [0001] The invention relates to the technical field of building components, in particular to a processing method for prestressed concrete reinforced piles. Background technique [0002] During the construction of bridges and culverts or high-rise buildings, it is necessary to carry out foundation piling according to the requirements. The method is to use machine punching and water mill drilling, and the hole depth meets the design requirements, then lower the reinforcement cage to the pile hole, and then insert the conduit for concrete pouring. [0003] In the design of construction engineering, it is difficult for prefabricated ordinary concrete reinforced piles to achieve relatively high tensile stress. During the process of sinking piles into the soil, prefabricated piles often have cracks. After long-term use, due to water seepage and erosion of harmful substances, it will be greatly Shorten the service life of reinforced piles. This requires the provisi...

Claims

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Application Information

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IPC IPC(8): B28B23/04B28B1/093B28B11/24E02D5/30E02D5/58C22C38/02C22C38/04C22C38/18C22C38/12C22C38/16C21D1/18C21D9/00
CPCB28B23/04B28B1/0935B28B11/245C21D1/18C21D9/0075C22C38/005C22C38/02C22C38/04C22C38/12C22C38/16C22C38/18E02D5/30E02D5/58
Inventor 郑仁礼
Owner 重庆市晟庄建材有限责任公司
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