Hydraulic prestressed steel pipe pile for building

Abstract

The utility model provides a hydraulic prestressed steel pipe pile for building, which relates to the technical field of prestressed pile body structures, and comprises a steel pipe body, a pile body part, a pile tip part and a reinforcement cage, the upper end and the lower end of the steel pipe body are respectively provided with an upper pulling plate and a lower pulling plate; the reinforcement cage is located on the concrete pile body reinforcement cage and comprises a plurality of main reinforcements connected between the upper pulling plate and the lower pulling plate. The steel pipe pile has the advantages that the main reinforcements of the steel pipe pile are tensioned by the upper pulling plate and the lower pulling plate, so that the main reinforcements generate prestress, and the horizontal load bearing capacity and the vertical load bearing capacity of the steel pipe pile are improved; meanwhile, the pile body part of the steel pipe pile is poured outside the steel pipe body, and when the steel pipe body is impacted by a hammer body, the steel pipe body can share high impact resistance, so that the impact load of the pile body part of the steel pipe pile is reduced, the overall impact load resistance of the steel pipe pile is improved, the concrete pile body part can be effectively prevented from being damaged under the impact force of hammering, and the service life of the steel pipe pile is prolonged. The service life of the steel pipe pile is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of prestressed pile structure, in particular to a hydraulic prestressed steel pipe pile tooling for construction. Background Art

[0002] Prestressed pipe piles are a type of pile that is prefabricated in a prefabricated component processing plant, and after curing and reaching the designed strength, it is transported to the construction site and driven into the soil by a pile driver. Because of its advantages of easy production and large bearing capacity, it has been widely used in many projects in recent years. Prestressed pipe piles use high-strength steel bars or prestressed steel wire bundles, so that the entire pile body can withstand greater horizontal and vertical loads after sufficient prestress is applied. During the construction process of prestressed pipe piles, the pile driver will apply an impact load to the top of the pile body (that is, drive it into the stratum soil by hammering). However, when the resistance of the stratum soil is large, the pile body is prone to hammer rejection. At this time, it is necessary to increase the hammer impact force. Excessive hammer impact force is likely to cause cracks and other injuries to the concrete part of the pile body, which will reduce the bearing capacity of the pile body and affect the service life of the pile body. Utility Model Content

[0003] In view of this, in order to improve the impact load resistance of prestressed pipe piles, prevent the concrete part of the pile body from being damaged under the hammer impact force, and increase the service life of the pile body, the utility model provides a hydraulic prestressed steel pipe pile for construction, including a steel pipe body, a pile body, a pile tip and a steel cage;

[0004] The upper and lower ends of the steel tube body are respectively provided with an upper pull plate and a lower pull plate; the pile body is made of concrete, the pile body is cast outside the steel tube body, and the pile body is located between the upper pull plate and the lower pull plate, and the upper pull plate and the lower pull plate are respectively provided with an upper protective ring sleeve and a lower protective ring sleeve, which surround the upper and lower ends of the pile body respectively;

[0005] The steel cage is located in the pile body; the steel cage includes a plurality of main bars and a plurality of stirrups, the plurality of main bars are evenly arranged around the steel tube body, the upper and lower ends of the main bars are respectively fixed to the upper pull plate and the lower pull plate, and all the main bars are tightened, and the stirrups are tightened and fixed on the main bars;

[0006] The pile tip is fixed on the pull-down plate.

[0007] Furthermore, the pile tip is a cone, and the pile tip is provided with a plurality of guide plates arranged along the conical surface of the pile tip.

[0008] Furthermore, a connecting platform is provided below the pull-down plate, a connecting ring is provided at the upper end of the pile tip, the connecting ring is sleeved outside the connecting platform, and the upper end surface of the connecting ring is connected to the lower end surface of the pull-down plate, and the connecting ring is welded to the pull-down plate.

[0009] Furthermore, the connecting platform is provided with an external thread, the inner wall of the connecting ring is provided with an internal thread, and the connecting platform is threadedly connected to the connecting ring.

[0010] Furthermore, a connecting plate is provided above the upper pull plate, and the connecting plate is arranged on the upper pull plate, and the two are arranged at an interval.

[0011] Furthermore, a supporting sleeve is provided between the upper pull plate and the connecting plate.

[0012] Furthermore, a plurality of reinforcing wing plates are provided on the side of the steel tube body.

[0013] Furthermore, a plurality of reinforcing wing plates are evenly arranged around the axis of the steel tube body, and all the reinforcing wing plates are perpendicular to the surface of the steel tube body.

[0014] Furthermore, a tightening lug and a tightening nut are respectively provided at both ends of the main reinforcement, and the tightening lug and the tightening nut are respectively located below the lower pull plate and above the upper pull plate.

[0015] Furthermore, the connecting plate is provided with a plurality of connecting holes.

[0016] The utility model provides a hydraulic prestressed steel pipe pile for construction, which has the following beneficial effects: the prestressed steel pipe pile comprises a steel pipe body, a pile body, a pile tip and a steel cage, wherein an upper pull plate and a lower pull plate are respectively arranged at the upper and lower ends of the steel pipe body; the steel cage is located in the concrete pile body, and the main reinforcement is tightened by the upper pull plate and the lower pull plate, so that the main reinforcement is prestressed, thereby improving the horizontal load and vertical load bearing capacity of the steel pipe pile; at the same time, the pile body of the steel pipe pile is cast outside the steel pipe body, and when the steel pipe body is impacted by a hammer, the steel pipe body can share a higher impact resistance, thereby reducing the impact load of the pile body of the steel pipe pile, and further improving the overall impact load resistance of the prestressed steel pipe pile, which can effectively prevent the concrete part of the high prestressed steel pipe pile from being damaged under the impact force of the hammer, thereby improving the service life of the pile body. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The utility model is a schematic diagram of the overall structure of a hydraulic prestressed steel pipe pile for construction according to an embodiment of the present utility model.

[0018] Figure 2 The utility model is a structural schematic diagram of a reinforcement cage of a hydraulic prestressed steel pipe pile for construction according to an embodiment of the utility model.

[0019] Figure 3 It is a cross-sectional view of a steel pipe body of a hydraulic prestressed steel pipe pile for construction according to an embodiment of the utility model.

[0020] Figure 4 yes Figure 3 Enlarged view of point A in the middle.

[0021] Figure 5 yes Figure 1 A three-dimensional view of the middle pile tip.

[0022] Figure 6 It is a structural schematic diagram of a steel tube body in another embodiment of the utility model.

[0023] In the above figure: 1-steel pipe body, 11-upper pull plate, 12-lower pull plate, 13-upper protective ring sleeve, 14-lower protective ring sleeve, 15-connecting platform, 16-reinforcement wing plate, 2-pile body, 3-pile tip, 31-guide plate, 32-connecting ring, 4-main reinforcement, 41-tensioning protrusion, 42-tensioning nut, 5-hoop reinforcement, 6-connecting plate. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the present utility model clearer, the implementation mode of the present utility model will be further described below in conjunction with the accompanying drawings.

[0025] Please refer to Figures 1 to 5 The utility model provides a hydraulic prestressed steel pipe pile for construction, comprising a steel pipe body 1, a pile body 2, a pile tip 3 and a steel cage.

[0026] The steel tube body 1 is a hollow round steel tube, and an upper pull plate 11 and a lower pull plate 12 of a circular plate structure are respectively provided at the upper and lower ends of the steel tube body 1; the pile body 2 is made of concrete, and the pile body 2 is also a hollow cylindrical structure. The pile body 2 is cast outside the steel tube body 1, and the inner wall of the pile body 2 is in close contact with the steel tube body 1, and the pile body 2 is located between the upper pull plate 11 and the lower pull plate 12. An upper protective ring sleeve 13 and a lower protective ring sleeve 14 are respectively provided on the upper pull plate 11 and the lower pull plate 12. The upper protective ring sleeve 13 and the lower protective ring sleeve 14 are both made of steel, and both are integrated with the steel tube body 1. The upper protective ring sleeve 13 and the lower protective ring sleeve 14 respectively surround the upper and lower ends of the pile body 2, that is, the upper and lower ends of the pile body 2 are respectively located in the upper protective ring sleeve 13 and the lower protective ring sleeve 14.

[0027] The steel cage is located in the pile body 2; the steel cage includes a plurality of main bars 4 and a plurality of stirrups 5, the plurality of main bars 4 are evenly arranged around the steel tube body 1, the upper and lower ends of the main bars 4 are respectively fixed on the upper pull plate 11 and the lower pull plate 12, and all the main bars 4 are tightened, and the stirrups 5 are tightened and fixed on the main bars 4; the pile tip 3 is fixed on the lower pull plate 12. In this embodiment, the pile tip 3 is a cone, and the pile tip 3 is also provided with a plurality of guide plates 31 arranged along the conical surface of the pile tip 3.

[0028] In the above structure, the steel pipe body 1 is pre-tensioned by a hydraulic device to generate prestress in the steel pipe body 1, and the main reinforcement of the steel cage is tensioned by the upper pull plate 12 and the lower pull plate 13, so that the main reinforcement 4 generates prestress, thereby improving the horizontal load and vertical load bearing capacity of the steel pipe pile.

[0029] The steel pipe body 1 is located inside the pile body 2 made of concrete. The steel pipe body 1 has a high impact resistance. When the steel pipe body 1 is impacted by a hammer, the steel pipe body 1 can share a high impact resistance, thereby reducing the impact load of the steel pipe pile body 2, thereby improving the overall impact load resistance of the prestressed steel pipe pile. It can effectively prevent the concrete part of the high prestressed steel pipe pile from being damaged under the impact force of the hammer, thereby improving the service life of the pile body.

[0030] The upper protective ring sleeve 13 and the lower protective ring sleeve 14 on the steel pipe body are respectively sleeved on the upper and lower ends of the pile body 2. The upper protective ring sleeve 13 and the lower protective ring sleeve 14 can protect the connection between the pile body 2 and the upper pull plate and the lower pull plate (the pile body at this connection is relatively fragile and easy to wear), so as to protect the end of the pile body 2 and prevent the pile body 2 at the connection from being worn by hard parts in the soil (such as gravel).

[0031] Preferably, a connecting platform 15 is provided below the pull-down plate 12, and a connecting ring 32 is provided at the upper end of the pile tip portion 3, the connecting ring 32 is sleeved outside the connecting platform 15, and the upper end surface of the connecting ring 32 is connected to the lower end surface of the pull-down plate 12, and the connecting ring 32 is welded to the pull-down plate 12. In this embodiment, the connecting platform 15 is provided with an external thread, the inner wall of the connecting ring 32 is provided with an internal thread, and the connecting platform 15 is threadedly connected to the connecting ring 32. The threaded connection structure of the connecting ring 32 and the connecting platform 15 and the welding structure of the connecting ring 32 and the pull-down plate 12 can ensure the connection strength between the pile tip portion 3 and the pull-down plate 12, and can facilitate the connection between the two.

[0032] Preferably, a connecting plate 6 is provided above the upper pull plate 11, the connecting plate 6 is arranged on the upper pull plate 11, and the two are arranged at intervals, and a plurality of connecting holes are provided on the connecting plate. A supporting sleeve is provided between the upper pull plate 11 and the connecting plate 6. In this embodiment, the supporting sleeve and the steel pipe body 1 are an integrated structure, and the connecting plate 6 facilitates the connection of the steel pipe pile with other pile structures to extend the length of the entire pile body.

[0033] Preferably, a tightening protrusion 41 and a tightening nut 42 are respectively provided at the lower end and the upper end of the main reinforcement 4. The tightening protrusion 41 and the tightening nut 42 are respectively located below the lower pull plate 12 and above the upper pull plate 11. A connecting thread is provided at the upper end of the main reinforcement 4. The cooperation between the tightening nut 42 and the connecting thread at the upper end of the main reinforcement 4 can facilitate the tightening of the main reinforcement 4, that is, the tightening force can be applied to the main reinforcement 4 by rotating the tightening nut 42.

[0034] refer to Figure 6 In another embodiment of the utility model, a plurality of reinforcing wing plates 16 are further provided on the side of the steel pipe body 1. The plurality of reinforcing wing plates 16 are evenly arranged around the axis of the steel pipe body 1, and all the reinforcing wing plates 16 are perpendicular to the surface of the steel pipe body 1. In this embodiment, the number of reinforcing wing plates 16 is four. After the pile body 2 is cast, the reinforcing wing plates 16 can increase the contact area between the steel pipe body 1 and the pile body 2, thereby increasing the friction between the steel pipe body 1 and the pile body 2, thereby increasing the structural strength of the steel pipe pile itself, and further increasing the impact load resistance of the steel pipe pile.

[0035] In this document, the directional words such as front, back, top, and bottom are defined by the positions of the components in the drawings and the positions of the components relative to each other, and are only for the sake of clarity and convenience in expressing the technical solution. It should be understood that the use of the directional words should not limit the scope of protection claimed in this application.

[0036] In the absence of conflict, the above embodiments and features in the embodiments may be combined with each other.

[0037] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A hydraulic prestressed steel pipe pile for construction, characterized in that: It includes steel pipe body, pile shaft, pile tip and steel cage; The upper and lower ends of the steel tube body are respectively provided with an upper pull plate and a lower pull plate; the pile body is made of concrete, the pile body is cast outside the steel tube body, and the pile body is located between the upper pull plate and the lower pull plate, and the upper pull plate and the lower pull plate are respectively provided with an upper protective ring sleeve and a lower protective ring sleeve, which surround the upper and lower ends of the pile body respectively; The steel cage is located in the pile body; the steel cage includes a plurality of main bars and a plurality of stirrups, the plurality of main bars are evenly arranged around the steel tube body, the upper and lower ends of the main bars are respectively fixed to the upper pull plate and the lower pull plate, and all the main bars are tightened, and the stirrups are tightened and fixed on the main bars; The pile tip is fixed on the pull-down plate.

2. A hydraulic prestressed steel pipe pile for construction according to claim 1, characterized in that: The pile tip is a cone, and is provided with a plurality of guide plates arranged along the conical surface of the pile tip.

3. The hydraulic prestressed steel pipe pile for construction according to claim 1, characterized in that: A connecting platform is provided below the pull-down plate, a connecting ring is provided at the upper end of the pile tip, the connecting ring is sleeved outside the connecting platform, the upper end surface of the connecting ring is connected to the lower end surface of the pull-down plate, and the connecting ring is welded to the pull-down plate.

4. A hydraulic prestressed steel pipe pile for construction according to claim 3, characterized in that: The connecting platform is provided with an external thread, the inner wall of the connecting ring is provided with an internal thread, and the connecting platform is threadedly connected with the connecting ring.

5. The hydraulic prestressed steel pipe pile for construction according to claim 1, characterized in that: A connecting plate is provided above the upper pull plate, and the connecting plate is arranged on the upper pull plate, and the two are arranged at an interval.

6. A hydraulic prestressed steel pipe pile for construction according to claim 5, characterized in that: A supporting sleeve is provided between the upper pull plate and the connecting plate.

7. The hydraulic prestressed steel pipe pile for construction according to claim 3, characterized in that: The side surface of the steel tube body is also provided with a plurality of reinforcing wing plates.

8. The hydraulic prestressed steel pipe pile for construction according to claim 7, characterized in that: A plurality of reinforcing wing plates are evenly arranged around the axis of the steel tube body, and all the reinforcing wing plates are perpendicular to the surface of the steel tube body.

9. The hydraulic prestressed steel pipe pile for construction according to claim 3, characterized in that: A tightening lug and a tightening nut are respectively provided at both ends of the main reinforcement, and the tightening lug and the tightening nut are respectively located below the lower pull plate and above the upper pull plate.

10. The hydraulic prestressed steel pipe pile for construction according to claim 5, characterized in that: The connecting plate is provided with a plurality of connecting holes.

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