Prestressed reducing pipe pile

Abstract

The utility model discloses a prestressed variable-diameter tubular pile, which relates to the technical field of tubular piles and comprises a first tubular pile, a second tubular pile fixedly arranged at the bottom of the first tubular pile and having a diameter smaller than that of the first tubular pile, a third tubular pile arranged at the bottom of the second tubular pile and having a diameter equal to that of the second tubular pile, and a positioning mechanism arranged at the joint of the second tubular pile and the third tubular pile. The positioning mechanism comprises two semi-ring positioning pieces which are arranged on the outer side of the joint of the second pipe pile and the third pipe pile and used for coaxially positioning the second pipe pile and the third pipe pile. The first pipe pile, the second pipe pile and other pile bodies are arranged in an up-and-down reducing mode, a pipe pile structure with the thick upper portion and the thin lower portion can be formed, loads borne by the tops of the pipe piles can be improved, materials used by the bottoms of the pipe piles can be reduced, cost is saved, the second pipe pile and the third pipe pile can be coaxially positioned through the two semi-ring positioning pieces, and the construction efficiency is improved. The second pipe pile and the third pipe pile cannot move relatively during welding, so that welding is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of pipe piles, in particular to a prestressed variable-diameter pipe pile. Background Art

[0002] Pull-out pipe piles are a type of pile foundation used to resist upward pull. In construction projects, when the groundwater level is high or there is buoyancy, the foundation of the building may be subject to an upward force. At this time, pull-out pipe piles are needed to enhance the stability of the foundation. Pull-out pipe piles are usually formed by setting steel bars or prestressed steel bars inside the pile body and pouring concrete. In the design and construction of pull-out pipe piles, factors such as the bearing capacity of the pile body, crack resistance, and friction between the pile and the soil need to be considered to ensure that it can effectively resist the upward pull and ensure the safety and stability of the building. Concrete pipe piles made of prestressed steel bars are also called prestressed pipe piles.

[0003] The patent with announcement number CN219137663U discloses "a prestressed variable diameter pipe pile, which includes a pipe pile, wherein the pipe pile is divided into two sections in the length direction, namely a first pipe and a second pipe, the first pipe and the second pipe are integrally formed, the first pipe is located above the second pipe, and the diameter of the first pipe is greater than the diameter of the second pipe. The utility model has the effect of reducing the production cost of the pipe pile."

[0004] With respect to the above-mentioned related technologies, the inventor believes that the actual piling depth may be relatively large. At this time, it is necessary to connect the reducer pipe pile with other prestressed pipe piles to carry out pile connection. People usually use a crane to lift the reducer pipe pile and align the lifted reducer pipe pile with other prestressed pipe piles that have been inserted into the ground, so that the reducer pipe pile and other prestressed pipe piles are coaxial. Only then can the connection between the reducer pipe pile and other prestressed pipe piles be welded. However, the reducer pipe pile lifted by the crane is easily affected by external factors such as wind and swings, which brings inconvenience to the welding process. Utility Model Content

[0005] The utility model aims at the deficiencies of the prior art and provides a prestressed variable diameter pipe pile. The specific technical solution is as follows:

[0006] A prestressed variable diameter pipe pile comprises a first pipe pile, a second pipe pile fixedly arranged at the bottom of the first pipe pile and having a smaller diameter than the first pipe pile, a third pipe pile arranged at the bottom of the second pipe pile and having the same diameter as the second pipe pile, and a positioning mechanism arranged at the connection between the second pipe pile and the third pipe pile, wherein the positioning mechanism comprises two semi-ring positioning members arranged at the outer side of the connection between the second pipe pile and the third pipe pile and used for coaxially positioning the second pipe pile and the third pipe pile, the two semi-ring positioning members are detachably connected, a gap hole is arranged in the semi-ring positioning member for people to pass through the semi-ring positioning member to weld the connection between the second pipe pile and the third pipe pile, and a plurality of rollers are rotatably arranged in the semi-ring positioning member for people to rotate the semi-ring positioning member to change the position of the gap hole for convenient welding.

[0007] By adopting the above technical solution, the two half-ring positioning members can coaxially position the second pipe pile and the third pipe pile, so that there will be no relative movement between the second pipe pile and the third pipe pile during welding, thereby facilitating welding.

[0008] Optionally, a transition angle is integrally formed between the bottom of the first pipe pile and the top of the second pipe pile, a plurality of fixed ribs are fixedly provided on the outer side wall of the first pipe pile, a lower end plate is fixedly provided on the bottom of the second pipe pile, and an upper end plate that cooperates and abuts against the lower end plate is fixedly provided on the top of the third pipe pile.

[0009] By adopting the above technical solution, the transition angle can connect the first pipe pile and the second pipe pile, and a plurality of fixed ribs can improve the structural strength of the first pipe pile.

[0010] Optionally, the two semi-ring positioning members are detachably connected by bolts, and the semi-ring positioning members include an upper semi-ring arranged on the outside of the second pipe pile, a lower semi-ring arranged on the outside of the third pipe pile, and a plurality of connecting rods fixed between the upper semi-ring and the lower semi-ring, and the gap hole is formed by the gaps between the upper semi-ring, the lower semi-ring and the plurality of connecting rods.

[0011] By adopting the above technical solution, people can pass through the semi-ring positioning piece through the gap hole to weld the connection between the second pipe pile and the third pipe pile.

[0012] Optionally, a plurality of rotating grooves are provided in the upper half ring and the lower half ring, a rotating rod is rotatably provided in the rotating grooves of the upper half ring and the lower half ring, the roller is fixed on the outer wall of the rotating rod, and the second pipe pile and the third pipe pile cooperate to abut between the outer walls of the plurality of the rollers.

[0013] By adopting the above technical solution, people can rotate the semi-ring positioning piece to change the position of the gap hole, which is convenient for people to fully weld the connection between the second pipe pile and the third pipe pile.

[0014] In summary, the present invention has at least one of the following beneficial effects:

[0015] 1. By setting the upper and lower diameter changes of the first pipe pile and the second pipe pile, a pipe pile structure with a thick top and a thin bottom can be formed, which can not only increase the load borne by the top of the pipe pile, but also reduce the material used at the bottom of the pipe pile, saving costs. In addition, the setting of the two semi-ring positioning pieces can coaxially position the second pipe pile and the third pipe pile, so that there will be no relative movement between the second pipe pile and the third pipe pile during welding, thereby facilitating welding.

[0016] 2. The arrangement of the upper end plate and the lower end makes it convenient for people to connect the second pipe pile with the third pipe pile. People can pass the semi-ring positioning piece through the gap hole to weld the connection between the second pipe pile and the third pipe pile. With the rotation of the roller, people can rotate the semi-ring positioning piece to change the position of the gap hole, which makes it convenient for people to fully weld the connection between the second pipe pile and the third pipe pile. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 This is a top view of the connection between the second pipe pile and the semi-ring positioning member of the utility model;

[0019] Figure 3 This is an internal connection diagram of the second pipe pile, the third pipe pile and the semi-ring positioning member of the utility model;

[0020] Figure 4 The utility model Figure 3 A magnified view of the structure in the middle.

[0021] Explanation of the reference numerals: 1. first pipe pile; 11. transition bevel; 12. fixed rib; 2. second pipe pile; 21. lower end plate; 3. third pipe pile; 31. upper end plate; 4. semi-ring positioning member; 41. upper semi-ring; 42. lower semi-ring; 43. connecting rod; 44. rotating groove; 45. rotating rod; 5. roller. DETAILED DESCRIPTION

[0022] The following is combined with Figure 1-4 The utility model is described in further detail.

[0023] The utility model embodiment discloses a prestressed variable diameter pipe pile, referring to Figure 1, including a first pipe pile 1, a second pipe pile 2 fixedly arranged at the bottom of the first pipe pile 1 and having a smaller diameter than the first pipe pile 1, a third pipe pile 3 arranged at the bottom of the second pipe pile 2 and having the same diameter as the second pipe pile 2, and a positioning mechanism arranged at the connection between the second pipe pile 2 and the third pipe pile 3. The diameter of the first pipe pile 1 is relatively large, which can increase the load borne by the top of the pipe pile. The diameters of the second pipe pile 2 and the third pipe pile 3 are relatively small, which can reduce the material used at the bottom of the pipe pile and save costs. The third pipe pile 3 is an existing prestressed pipe pile, and its internal structure has been disclosed and will not be described in detail here. By connecting the third pipe pile 3, the overall length of the pipe pile can be extended, which is suitable for deeper piling construction.

[0024] Reference Figure 1 A transition bevel 11 is integrally formed between the bottom of the first pipe pile 1 and the top of the second pipe pile 2. The first pipe pile 1 and the second pipe pile 2 are integrally formed. The transition bevel 11 can connect the first pipe pile 1 and the second pipe pile 2 to reduce the possibility of breakage between the first pipe pile 1 and the second pipe pile 2. A plurality of fixed ribs 12 are fixedly provided on the outer wall of the first pipe pile 1. The plurality of fixed ribs 12 can improve the structural strength of the first pipe pile 1.

[0025] Reference Figure 1-3 A lower end plate 21 is fixedly provided at the bottom of the second pipe pile 2, and an upper end plate 31 that cooperates and abuts against the lower end plate 21 is fixedly provided at the top of the third pipe pile 3. After the lower end plate 21 and the upper end plate 31 are welded, the second pipe pile 2 and the third pipe pile 3 can be connected.

[0026] Reference Figure 1-3 The positioning mechanism includes two semi-ring positioning members 4 which are arranged outside the connection between the second pipe pile 2 and the third pipe pile 3 and are used for coaxially positioning the second pipe pile 2 and the third pipe pile 3. The two semi-ring positioning members 4 are detachably connected to each other and are detachably connected to each other by bolts. The two semi-ring positioning members 4 connected by bolts can position the second pipe pile 2 and the third pipe pile 3 which have equal diameters, so that the second pipe pile 2 and the third pipe pile 3 can remain coaxial, thereby facilitating people to weld the lower end plate 21 and the upper end plate 31, and the two semi-ring positioning members 4 connected by bolts are also convenient to disassemble and assemble.

[0027] Reference Figure 1-3 The semi-ring positioning member 4 includes an upper semi-ring 41 arranged on the outer side of the second pipe pile 2, a lower semi-ring 42 arranged on the outer side of the third pipe pile 3, and a plurality of connecting rods 43 fixedly arranged between the upper semi-ring 41 and the lower semi-ring 42. The connecting rod 43 can connect the upper semi-ring 41 and the lower semi-ring 42. The upper semi-ring 41, the lower semi-ring 42 and the connecting rod 43 can connect and limit the connection between the second pipe pile 2 and the third pipe pile 3. Two transversely adjacent upper semi-rings 41 are connected by bolts, and two transversely adjacent lower semi-rings 42 are also connected by bolts.

[0028] Reference Figure 1-3 A gap hole is provided in the semi-ring positioning member 4 for people to pass through the semi-ring positioning member 4 to weld the connection between the second pipe pile 2 and the third pipe pile 3. The gap hole is formed by the gap between the upper semi-ring 41, the lower semi-ring 42 and a plurality of connecting rods 43. People can pass through the gap hole to weld the lower end plate 21 and the upper end plate 31.

[0029] Reference Figure 3-4 A plurality of rotation grooves 44 are provided in the upper half ring 41 and the lower half ring 42 , and a rotation rod 45 is rotatably provided in the rotation grooves 44 of the upper half ring 41 and the lower half ring 42 . The upper half ring 41 and the lower half ring 42 can support and limit the rotation rod 45 through the rotation grooves 44 .

[0030] Reference Figure 2-4 A plurality of rollers 5 are rotatably provided inside the semi-ring positioning member 4 for people to rotate the semi-ring positioning member 4 to change the position of the gap hole for convenient welding. The rollers 5 are fixedly arranged on the outer wall of the rotating rod 45. The second pipe pile 2 and the third pipe pile 3 cooperate to abut between the outer walls of the plurality of rollers 5. The rollers 5 can connect the second pipe pile 2, the third pipe pile 3 and the semi-ring positioning member 4, so that the semi-ring positioning member 4 can abut the outer sides of the second pipe pile 2 and the third pipe pile 3, thereby coaxially positioning the second pipe pile 2 and the third pipe pile 3, and through the rotation connection of the rollers 5, people can change the position of the gap hole after rotating the semi-ring positioning member 4 as a whole, thereby changing the required welding position.

[0031] The implementation principle of a prestressed variable diameter pipe pile in the embodiment of the utility model is:

[0032] During installation, people can first use the piling equipment to press the third pipe pile 3 into the ground, and then use the crane and other lifting equipment to lift the first pipe pile 1 and the second pipe pile 2 as a whole, and align the lower end plate 21 at the bottom of the second pipe pile 2 that is slowly lowered after lifting with the upper end plate 31 at the top of the third pipe pile 3, and then use bolts to install the two semi-ring positioning members 4 on the outside of the connection between the second pipe pile 2 and the third pipe pile 3, until the outer side walls of the second pipe pile 2 and the third pipe pile 3 can cooperate and abut against the plurality of rollers 5;

[0033] At this time, people can weld the lower end plate 21 and the upper end plate 31 through the gap hole. After the lower end plate 21 and the upper end plate 31 are welded, the second pipe pile 2 and the third pipe pile 3 can be fixed. During welding, the semi-ring positioning piece 4 and other components can coaxially position the second pipe pile 2 and the third pipe pile 3, so that there will be no relative movement between the hoisted second pipe pile 2 and the third pipe pile 3 inserted in the ground during welding, which is convenient for welding.

[0034] People can rotate the semi-ring positioning member 4 to make the rollers 5 rotate on the outer side walls of the second pipe pile 2 and the third pipe pile 3 to change the position of the gap hole, thereby changing the required welding position, making it convenient for people to fully weld the connection between the second pipe pile 2 and the third pipe pile 3.

[0035] The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A prestressed variable diameter pipe pile, comprising a first pipe pile (1), a second pipe pile (2) fixedly arranged at the bottom of the first pipe pile (1) and having a smaller diameter than the first pipe pile (1), a third pipe pile (3) arranged at the bottom of the second pipe pile (2) and having the same diameter as the second pipe pile (2), and a positioning mechanism arranged at the connection between the second pipe pile (2) and the third pipe pile (3), characterized in that: The positioning mechanism comprises two semi-ring positioning members (4) arranged outside the connection between the second pipe pile (2) and the third pipe pile (3) and used for coaxially positioning the second pipe pile (2) and the third pipe pile (3); the two semi-ring positioning members (4) are detachably connected; a gap hole is provided in the semi-ring positioning member (4) for people to pass through the semi-ring positioning member (4) to weld the connection between the second pipe pile (2) and the third pipe pile (3); and a plurality of rollers (5) are rotatably provided in the semi-ring positioning member (4) for people to rotate the semi-ring positioning member (4) to change the position of the gap hole for convenient welding.

2. A prestressed variable diameter pipe pile according to claim 1, characterized in that: A transition bevel (11) is integrally formed between the bottom of the first pipe pile (1) and the top of the second pipe pile (2), and a plurality of fixed ribs (12) are fixedly provided on the outer side wall of the first pipe pile (1).

3. The prestressed variable diameter pipe pile according to claim 1, characterized in that: A lower end plate (21) is fixedly provided at the bottom of the second pipe pile (2), and an upper end plate (31) that cooperates and abuts against the lower end plate (21) is fixedly provided at the top of the third pipe pile (3).

4. The prestressed variable diameter pipe pile according to claim 1, characterized in that: The two half-ring positioning members (4) are detachably connected via bolts.

5. The prestressed variable diameter pipe pile according to claim 1, characterized in that: The semi-ring positioning member (4) comprises an upper semi-ring (41) arranged outside the second pipe pile (2), a lower semi-ring (42) arranged outside the third pipe pile (3), and a plurality of connecting rods (43) fixedly arranged between the upper semi-ring (41) and the lower semi-ring (42).

6. The prestressed variable diameter pipe pile according to claim 5, characterized in that: The gap hole is formed by the gaps between the upper half ring (41), the lower half ring (42) and a plurality of the connecting rods (43).

7. The prestressed variable diameter pipe pile according to claim 6, characterized in that: A plurality of rotation grooves (44) are provided in the upper half ring (41) and the lower half ring (42), and rotation rods (45) are rotatably provided in the rotation grooves (44) of the upper half ring (41) and the lower half ring (42).

8. The prestressed variable diameter pipe pile according to claim 7, characterized in that: The roller (5) is fixedly arranged on the outer wall of the rotating rod (45), and the second pipe pile (2) and the third pipe pile (3) are matched and abutted between the outer walls of a plurality of the rollers (5).

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