Variable cross-section concrete tubular pile

Abstract

The utility model relates to the technical field of constructional engineering, and discloses a variable cross-section concrete pipe pile which comprises a first pipe pile, the bottom face of the first pipe pile is connected with a second pipe pile, the bottom face of the second pipe pile is connected with a third pipe pile, a steel bar is installed in the first pipe pile, and a first stirrup is welded to the outer side face of the steel bar. Second stirrups are welded to the bottom ends of the steel bars, connecting ribs are welded to the inner sides of the second stirrups, and third stirrups are welded to the ends, away from the second stirrups, of the connecting ribs. The bearing capacity can be improved in a soil layer with high bearing capacity through the larger pile body sectional area of the first pipe pile, in addition, loads can be distributed more reasonably through the change of the section of the third pipe pile, and especially in a layered soil layer, the third pipe pile can increase the section of the pile body in a good soil layer, so that the bearing capacity of the third pipe pile is improved. The bearing capacity of the layer of soil is fully exerted, so that materials and cost can be saved during production, and meanwhile, the overall bearing performance and construction convenience of the device are also improved.

Description

Technical Field

[0001] The utility model relates to the technical field of construction engineering, in particular to a variable-section concrete pipe pile. Background Art

[0002] Concrete pipe piles are a kind of prefabricated building material, which are widely used in building foundation engineering. They are pipe-shaped components made of concrete and steel bars through special processes. They have high strength and durability. Concrete pipe piles can withstand a wide range of loads and are especially suitable for building foundations with weak foundation conditions. Variable-section concrete pipe piles are a new type of prefabricated concrete pipe piles. Its characteristic is that the cross-section of the pipe pile changes in the length direction. It is usually composed of a pipe section with a smaller diameter and a pipe section with a larger diameter. Variable-section pipe piles can optimize the stress state of the pile body and improve its bearing capacity by adjusting the diameter ratio of different cross-section parts. At the same time, in deep foundation pits, variable-section pipe piles can reduce the production cost caused by excessive pile diameter. Therefore, they are widely used in many fields such as construction engineering.

[0003] According to the search, Chinese patent literature, announcement number: CN202170506U, discloses a variable-section high-strength concrete pipe pile, which is formed by sequentially connecting two or more segmented pipe piles with different cross-sectional diameters. The cross-section of the pipe pile is an inverted trapezoidal structure, which can significantly reduce the amount of concrete, steel bars and stirrups without reducing the bearing capacity of the concrete pipe pile, so as to save the production cost of the product. However, in actual use, since the steel bars of different segmented pipe piles are separated, the overall bearing capacity of the pipe pile will not only be greatly reduced, but also the intervals between multiple segmented pipe piles and other data need to be measured synchronously during production, which increases unnecessary production costs and reduces the overall production efficiency of the device. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the utility model provides a variable-section concrete pipe pile, which has the advantages of stable structure, strong bearing capacity, easy processing, and reduced production cost, and solves the above-mentioned technical problems.

[0006] (II) Technical solution

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a variable-section concrete pipe pile, comprising a first pipe pile, a second pipe pile being fixedly connected to the bottom surface of the first pipe pile, a third pipe pile being fixedly connected to the bottom surface of the second pipe pile, a steel bar being fixedly installed inside the first pipe pile, a first stirrup being welded to the outer side surface of the steel bar, a second stirrup being welded to the bottom end of the steel bar, a connecting bar being welded to the inner side of the second stirrup, and a third stirrup being welded to the end of the connecting bar away from the second stirrup.

[0008] Preferably, the number of the steel bar and the first stirrups are both multiple, and the multiple first stirrups are evenly distributed on the outer side of the steel bar.

[0009] Through the above technical scheme, multiple steel bars are the main force-bearing components of the entire device, and multiple first stirrups are welded to form a steel cage, which can effectively enhance the overall structural strength and stability of the device. At the same time, the first stirrups can also be used to provide lateral constraints on the pipe piles, ensuring that the pipe piles will not slide or tilt laterally when subjected to force, thereby improving the overall safety and reliability of the device.

[0010] Preferably, the number of the second stirrups and the number of the third stirrups are both provided to be two, the number of the connecting bars is provided to be multiple, and the multiple steel bars are evenly distributed on the outer sides of the second stirrups and the third stirrups.

[0011] Through the above technical solution, two second stirrups, the third stirrups and multiple connecting bars can connect multiple steel bars and parts such as the first stirrups together, thereby not only effectively improving the overall bearing capacity of the device, but also only requiring direct welding during production, thereby reducing unnecessary production costs.

[0012] Preferably, the diameters of the second and third stirrups near the bottom of the second pipe pile are smaller than those of the second and third stirrups near the bottom of the first pipe pile, and the cross-sectional area of ​​the second pipe pile is smaller than that of the first pipe pile.

[0013] Through the above technical solution, in soil layers with strong bearing capacity, the first pipe pile can improve the bearing capacity through its larger pile body cross-sectional area, while in soft soil layers, the second pipe pile can reduce settlement and construction difficulty through the smaller pile body cross-sectional area. In addition, it can also save materials and costs during production, thereby effectively improving the overall stability and economy of the device.

[0014] Preferably, the diameters of the plurality of first stirrups inside the third pipe pile decrease successively from top to bottom, and the outer side surface of the third pipe pile is configured as an inclined surface.

[0015] Through the above technical scheme, the load can be distributed more reasonably due to the change in the cross-section of the third pipe pile, especially in layered soil layers. The third pipe pile with a variable cross-section can increase the cross-section of the pile body in a good soil layer to give full play to the bearing capacity of the soil layer. At the same time, when the device is installed in the foundation pit, the inclined surface of the third pipe pile can also play a certain guiding role, thereby improving the overall bearing performance and construction convenience of the device.

[0016] Preferably, end plates are fixedly mounted on the top end of the first pipe pile and the bottom end of the third pipe pile, and connection holes are provided inside the two end plates.

[0017] Through the above technical solution, the two end plates and the connecting holes can be conveniently connected to other workpieces such as pipe piles, making the pipe piles more convenient and quick during the construction process such as piling and connecting piles, thereby improving work efficiency.

[0018] Compared with the prior art, the utility model provides a variable cross-section concrete pipe pile having the following features:

[0019] Beneficial effects:

[0020] 1. The utility model can effectively enhance the overall structural strength and stability of the device by welding a plurality of steel bars and a plurality of first stirrups together to form a steel cage. At the same time, the first stirrups can also be used to provide lateral constraints on the pipe piles, ensuring that the pipe piles will not slide or tilt laterally when subjected to force, thereby improving the overall safety and reliability of the device. By welding a plurality of steel bars and parts such as the first stirrups together through two second stirrups, a third stirrup and a plurality of connecting bars, it is possible to effectively improve the overall bearing capacity of the device and reduce unnecessary production costs during production.

[0021] 2. The utility model can improve the bearing capacity in soil layers with strong bearing capacity by using the larger pile body cross-sectional area of ​​the first pipe pile, and can reduce settlement and construction difficulty in soft soil layers by using the smaller pile body cross-sectional area of ​​the second pipe pile. In addition, due to the change in the cross-sectional area of ​​the third pipe pile, the load can be distributed more reasonably, especially in layered soil layers. The third pipe pile with a variable cross-section can increase the pile body cross-sectional area in a good soil layer to give full play to the bearing capacity of the soil layer. At the same time, the inclined surface of the third pipe pile can also play a certain guiding role when the device is installed in the foundation pit. Therefore, it can not only save materials and costs during production, but also improve the overall bearing performance and construction convenience of the device; other pipe piles and other workpieces can be conveniently connected through the two end plates and the connecting holes, making the pipe piles more convenient and quick in the construction process of piling and connecting piles, thereby improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a three-dimensional schematic diagram of the structure of the utility model;

[0023] Figure 2 It is a front view schematic diagram of the structural steel bars and other parts of the utility model;

[0024] Figure 3 It is a three-dimensional cross-sectional schematic diagram of the structural steel bars and other parts of the utility model.

[0025] Among them: 1. first pipe pile; 2. second pipe pile; 3. third pipe pile; 4. steel bar; 5. first stirrup; 6. second stirrup; 7. connecting reinforcement; 8. third stirrup; 9. end plate; 10. connecting hole. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] See also Figure 1-3 A variable-section concrete pipe pile comprises a first pipe pile 1, a second pipe pile 2 is fixedly connected to the bottom surface of the first pipe pile 1, a third pipe pile 3 is fixedly connected to the bottom surface of the second pipe pile 2, a steel bar 4 is fixedly installed inside the first pipe pile 1, a first stirrup 5 is welded to the outer side of the steel bar 4, a second stirrup 6 is welded to the bottom end of the steel bar 4, a connecting bar 7 is welded to the inner side of the second stirrup 6, and a third stirrup 8 is welded to the end of the connecting bar 7 away from the second stirrup 6.

[0028] Specifically, the number of the steel bars 4 and the first stirrups 5 are both multiple, and the multiple first stirrups 5 are evenly distributed on the outer side of the steel bars 4. The advantage is that the multiple steel bars 4 are the main force-bearing components of the entire device, and the multiple first stirrups 5 are welded to form a steel cage, which can effectively enhance the overall structural strength and stability of the device. At the same time, the first stirrups 5 can also be used to provide lateral constraints on the pipe piles, ensuring that the pipe piles will not slide or tilt laterally when subjected to force, thereby improving the overall safety and reliability of the device.

[0029] Specifically, the number of the second stirrups 6 and the third stirrups 8 are both two, the number of the connecting bars 7 is multiple, and the multiple steel bars 4 are evenly distributed on the outer sides of the second stirrups 6 and the third stirrups 8. The advantage is that through this structure, the two second stirrups 6, the third stirrups 8 and the multiple connecting bars 7 can connect the multiple steel bars 4 and the first stirrups 5 and other parts together, so that not only can the overall bearing capacity of the device be effectively improved, but also only direct welding is required during production, thereby reducing unnecessary production costs.

[0030] Specifically, the diameters of the second stirrups 6 and the third stirrups 8 near the bottom of the second pipe pile 2 are smaller than the diameters of the second stirrups 6 and the third stirrups 8 near the bottom of the first pipe pile 1, and the cross-sectional area of ​​the second pipe pile 2 is smaller than the cross-sectional area of ​​the first pipe pile 1. The advantage is that, through this structure, in a soil layer with a strong bearing capacity, the first pipe pile 1 can improve its bearing capacity through its larger pile body cross-sectional area, and in a weak soil layer, the second pipe pile 2 can reduce settlement and construction difficulty through its smaller pile body cross-sectional area. In addition, it can also save materials and costs during production, thereby effectively improving the overall stability and economy of the device.

[0031] Specifically, the diameters of the multiple first stirrups 5 inside the third pipe pile 3 decrease from top to bottom, and the outer side surface of the third pipe pile 3 is set as an inclined surface. The advantage is that, through this structure, the load can be more reasonably distributed due to the change in the cross section of the third pipe pile 3, especially in layered soil, the third pipe pile 3 with a variable cross section can increase the cross section of the pile body in a good soil layer, giving full play to the bearing capacity of the layer of soil, and at the same time, the inclined surface of the third pipe pile 3 can also play a certain guiding role when the device is installed in the foundation pit, thereby improving the overall bearing performance of the device and the convenience of construction.

[0032] Specifically, the top of the first pipe pile 1 and the bottom of the third pipe pile 3 are both fixedly mounted with end plates 9, and the interiors of the two end plates 9 are both provided with connection holes 10. The advantage is that, through this structure, the two end plates 9 and the connection holes 10 can be conveniently connected to other pipe piles and other workpieces, making the pipe piles more convenient and quick in the construction process of piling and connecting piles, thereby improving work efficiency.

[0033] When in use, by welding together a plurality of steel bars 4 and a plurality of first stirrups 5 to form a steel cage, the overall structural strength and stability of the device can be effectively enhanced. At the same time, the first stirrups 5 can also be used to provide lateral constraints for the pipe piles, ensuring that the pipe piles will not slide or tilt laterally when subjected to force, thereby improving the overall safety and reliability of the device; by welding together a plurality of steel bars 4 and first stirrups 5 and other parts through two second stirrups 6, a third stirrup 8 and a plurality of connecting bars 7, it is possible to effectively improve the overall bearing capacity of the device and reduce unnecessary production costs during production; by using the first pipe pile 1, its larger pile body cross-sectional area can improve the bearing capacity in soil layers with stronger bearing capacity, and in soft soil layers, it can improve the bearing capacity. In weak soil layers, the smaller pile body cross-sectional area of ​​the second pipe pile 2 can be used to reduce settlement and construction difficulty. In addition, due to the change in the cross-section of the third pipe pile 3, the load can be distributed more reasonably, especially in layered soil layers. The third pipe pile 3 with a variable cross-section can increase the pile body cross-section in a good soil layer to give full play to the bearing capacity of the soil layer. At the same time, the inclined surface of the third pipe pile 3 can also play a certain guiding role when the device is installed in the foundation pit. Therefore, it can not only save materials and costs during production, but also improve the overall bearing performance and construction convenience of the device; other pipe piles and other workpieces can be easily connected through the two end plates 9 and the connecting holes 10, making the pipe piles more convenient and quick in the construction process such as piling and connecting piles, thereby improving work efficiency.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A variable cross-section concrete pipe pile, comprising a first pipe pile (1), characterized in that: The bottom surface of the first pipe pile (1) is fixedly connected to the second pipe pile (2), the bottom surface of the second pipe pile (2) is fixedly connected to the third pipe pile (3), a steel bar (4) is fixedly installed inside the first pipe pile (1), a first stirrup (5) is welded to the outer side of the steel bar (4), a second stirrup (6) is welded to the bottom end of the steel bar (4), a connecting bar (7) is welded to the inner side of the second stirrup (6), and a third stirrup (8) is welded to the end of the connecting bar (7) away from the second stirrup (6).

2. A variable cross-section concrete pipe pile according to claim 1, characterized in that: The steel bars (4) and the first stirrups (5) are both provided in plural numbers, and the plural first stirrups (5) are evenly distributed on the outer side of the steel bars (4).

3. The variable cross-section concrete pipe pile according to claim 1, characterized in that: The number of the second stirrups (6) and the number of the third stirrups (8) are both two, the number of the connecting bars (7) is multiple, and the multiple steel bars (4) are evenly distributed on the outer sides of the second stirrups (6) and the third stirrups (8).

4. The variable cross-section concrete pipe pile according to claim 1, characterized in that: The diameters of the second stirrups (6) and the third stirrups (8) near the bottom of the second pipe pile (2) are smaller than the diameters of the second stirrups (6) and the third stirrups (8) near the bottom of the first pipe pile (1), and the cross-sectional area of ​​the second pipe pile (2) is smaller than the cross-sectional area of ​​the first pipe pile (1).

5. The variable cross-section concrete pipe pile according to claim 1, characterized in that: The diameters of the plurality of first stirrups (5) inside the third pipe pile (3) decrease in sequence from top to bottom, and the outer side surface of the third pipe pile (3) is arranged as an inclined surface.

6. The variable cross-section concrete pipe pile according to claim 1, characterized in that: End plates (9) are fixedly mounted on the top end of the first pipe pile (1) and the bottom end of the third pipe pile (3), and connection holes (10) are provided inside the two end plates (9).

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