Large diameter prestressed pipe pile and construction technology

Abstract

The present invention belongs to the technical field of concrete pipe pile production, and specifically relates to a large-diameter prestressed pipe pile and a construction process. The large-diameter prestressed pipe pile includes a steel cage, a plurality of supporting bodies of the steel cage, a plurality of reinforcing hoops, spiral hoops and a reinforcement structure. The center of the reinforcing hoops and the supporting body is limited by the reinforcement structure, so that the centers of various mechanisms of the steel cage are located on the same axis, which not only improves the welding accuracy and avoids the generation of torsion, but also saves labor costs and construction time, reduces the difficulty of construction, and has the advantages of high structural strength, high work efficiency and good economy.

Description

Technical Field

[0001] The invention belongs to the technical field of concrete pipe pile production, and in particular relates to a large-diameter prestressed pipe pile and a construction process. Background Art

[0002] Piles are divided into prestressed concrete pipe piles and prestressed high-strength concrete pipe piles according to the concrete strength grade or effective prestressed stress. The code name of prestressed concrete pipe piles is PC, and the code name of prestressed high-strength concrete pipe piles is PHC. The concrete strength grade of PHC pipe piles is higher than that of PC pipe piles, usually not less than C80, so PHC pipe piles are often used in modern infrastructure construction, such as municipal, bridge, large public building and other construction fields. At present, in order to adapt to different construction fields, the model, type, diameter, length, etc. of PHC pipe piles are gradually transformed into high strength and large diameter.

[0003] The production process of concrete pipe piles in the prior art generally includes the steps of mixing, preparing steel cages and molds, pouring, centrifugal curing, etc. In the production of large-diameter prestressed pipe piles, the preparation of steel cages is particularly critical because the diameter of large-diameter prestressed pipe piles is significantly increased, and the structural strength and stability of the steel cages need to be improved to meet the engineering safety and engineering quality.

[0004] The document with the authorization announcement number CN116497798B discloses a prefabricated assembled ultra-high performance concrete large-diameter pipe pile and construction process, including a concrete pipe, a flange and a reinforcement structure, the reinforcement structure includes a positioning component, a steel bar and a stirrup, the positioning component includes a support device and a locking group, the locking group is fixedly installed inside the support device, and the locking group is distributed in an annular shape, and the support device includes a reinforcement support plate, a hollow groove, a circular hole, a limiting ring, a through groove and a guide cavity. The construction process mainly includes: firstly passing the steel bar through the positioning component, then welding the stirrup around the outer ring of the steel bar, and then connecting the locking group with the stirrup to strengthen the connection between the stirrup and the steel bar.

[0005] The construction of this scheme is difficult for the following reasons: First, the dimensional accuracy of the circular holes, guide cavities and other structures on the support device is high, otherwise it is easy to affect the smoothness of the steel bar penetration and increase the difficulty of fixing the steel bar; second, since the support device mainly determines the installation direction and installation position of the steel bar, the spacing distribution of the support device and the degree of axial collinearity directly affect the overall structural strength of the steel cage, and how to calibrate the axial collinearity of multiple support devices is an important issue in the preparation process, which increases the difficulty of construction.

[0006] To this end, the inventors have proposed a large-diameter prestressed pipe pile and a construction process to solve the above-mentioned technical problems. Summary of the invention

[0007] In view of the above problems, one of the purposes of the present invention is to provide a large-diameter prestressed pipe pile, and the specific technical solution is as follows:

[0008] A large-diameter prestressed pipe pile comprises a steel cage, wherein the steel cage comprises a plurality of support bodies, a plurality of reinforcing hoops, spiral hoops and a reinforcement structure; the support bodies are distributed in an annular manner, and a single support body comprises a plurality of main bars, a threaded section arranged on the end of the main bar, and an internally threaded connecting sleeve adapted to the threaded section for connecting two adjacent main bars; the reinforcing hoops are distributed in an interval along the length direction of the support bodies, and a single reinforcing hoops is sleeved inside all the support bodies; the spiral hoops are coiled around the outside of all the support bodies; the reinforcement structure comprises an internal reinforcement member sleeved inside all the internally threaded connecting sleeves, a first connecting ring arranged at the center of the internal reinforcement member, a second connecting ring arranged at the center of the reinforcing hoops, and a calibration rod passing through the first connecting ring and the second connecting ring.

[0009] As a further preferred embodiment of the present invention, the internal reinforcement member includes an inner reinforcement ring and a plurality of mounting grooves arranged on the inner ring surface of the inner reinforcement ring; the first connecting ring includes a first connecting ring body, a plurality of first fixing grooves arranged on the outer ring surface of the first connecting ring body, and a fixing rod connected to the first fixing groove at one end and to the mounting groove at the other end.

[0010] As a further preferred embodiment of the present invention, the reinforcement structure also includes an external reinforcement member arranged on the outside of the internal threaded connecting sleeve; the external reinforcement member includes an external reinforcement plate arranged on the outer peripheral surface of the internal threaded connecting sleeve away from the inner reinforcement ring, a first through hole arranged on the inner reinforcement ring, and a support rod arranged on the outer ring surface of the first connecting ring body and detachably connected to the external reinforcement plate by passing through the first through hole.

[0011] As a further preferred embodiment of the present invention, the outer reinforcement plate is provided with a second through hole for passing the support rod; the end of the support rod away from the first connecting ring body is provided with an external thread section, and at least two limit nuts are provided which are threadedly connected to the external thread section and are located on both sides of the outer reinforcement plate.

[0012] As a further preferred embodiment of the present invention, the external reinforcement member further comprises an extension rod disposed on a side of the external reinforcement plate away from the internal threaded connection sleeve, and a support plate disposed on the extension rod and parallel to the external reinforcement plate.

[0013] As a further preferred embodiment of the present invention, the second connecting ring includes a second connecting ring body, a plurality of second fixing grooves arranged on the outer ring surface of the second connecting ring body, and a connecting rod having one end connected to the second fixing groove and the other end connected to the reinforcing stirrup.

[0014] As a further preferred embodiment of the present invention, the connecting rod includes a rod body, a connecting plate arranged on the end of the rod body away from the second connecting ring body, a first buckle plate detachably connected to the connecting plate, and a second buckle plate detachably connected to the first buckle plate to form a connecting ring for fixing the reinforcing hoop.

[0015] As a further preferred embodiment of the present invention, the first gusset plate has the same structure as the second gusset plate, and the first gusset plate includes: an arc-shaped plate, two ear plates arranged on both side ends of the arc-shaped plate, connecting screw holes arranged on the ear plates, an extension plate arranged on one side of a single ear plate, and an adjustment hole arranged on the extension plate, and the connecting screw holes are connected by bolts; and positioning screw holes matching the adjustment holes are arranged on the connecting plate.

[0016] As a further preferred embodiment of the present invention, the positioning screw hole is the same as the connecting screw hole, and the positioning screw hole is connected to the adjusting hole by the bolt.

[0017] As a further preferred embodiment of the present invention, an annular groove which is engaged and connected with the inner reinforcement ring and the outer reinforcement plate is provided on the outer peripheral side of the internal threaded connection sleeve.

[0018] The second object of the present invention is to provide a construction process for the above-mentioned large-diameter prestressed pipe pile, which specifically includes the following steps:

[0019] S1. Build the inner reinforcement member at the two ends of the steel cage, and set the first connecting ring at the center of the inner reinforcement member;

[0020] S2, arranging the reinforcing stirrups at intervals along the length direction of the steel cage, and arranging the second connecting ring at the center of each reinforcing stirrup;

[0021] S3, correcting the positions of all the first connecting rings and the second connecting rings by using the calibration rod to ensure that the inner reinforcement member and the reinforcing stirrups are coaxial;

[0022] S4, connecting the plurality of main ribs through the internal thread connection sleeves to form a single support body, and connecting the internal thread connection sleeves at both ends of the support body to the two internal reinforcement members respectively, until all the support bodies are connected to the internal reinforcement members;

[0023] S5, completing the fixed connection between all the support bodies and the reinforcing stirrups;

[0024] S6. Wind the spiral stirrups around the outside of the entire supporting body and fix them to the supporting body.

[0025] The beneficial effects of the present invention are:

[0026] The large-diameter prestressed pipe piles provided by the present invention limit the center of the reinforcing stirrups and the supporting body through the reinforcement structure, so that the centers of various mechanisms of the steel cage are located on the same axis, which not only improves the welding accuracy and avoids the generation of torque, but also saves labor costs and construction time, reduces the difficulty of construction, and has the advantages of high structural strength, high work efficiency and good economy. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Attached Figure 1 It is a schematic diagram of the structure of the present invention at the main viewing angle.

[0028] Attached Figure 2 It is a schematic diagram of the three-dimensional structure of the present invention.

[0029] Attached Figure 3 It is a schematic structural diagram of the reinforcement structure at the internal thread connection sleeve of the present invention from a side view angle.

[0030] Attached Figure 4 It is a schematic structural diagram of the reinforcement structure at the reinforcing stirrups of the present invention when viewed from a side angle.

[0031] Attached Figure 5 It is a structural schematic diagram of the connecting rod of the present invention.

[0032] Attached Figure 6 It is a schematic diagram of the connection structure between the first buckle plate and the second buckle plate of the present invention.

[0033] Attached Figure 7 Another schematic diagram of the structure of the reinforcement structure at the internal thread connection sleeve of the present invention when viewed from a side angle.

[0034] Description of the drawings: supporting body 1, reinforcing stirrups 2, spiral stirrups 3, reinforcement structure 4;

[0035] Main reinforcement 11, internal thread connection sleeve 12;

[0036] Annular groove 121;

[0037] Inner reinforcement 41, first connecting ring 42, second connecting ring 43, calibration rod 44, outer reinforcement 45;

[0038] Inner reinforcement ring 411, mounting groove 412;

[0039] A first connecting ring body 421, a first fixing groove 422, and a fixing rod 423;

[0040] A second connecting ring body 431, a second fixing groove 432, and a connecting rod 433;

[0041] Rod body 433a, connecting plate 433b, first buckle plate 433c, second buckle plate 433d;

[0042] Positioning screw hole 433b1;

[0043] Arc plate 433c1, ear plate 433c2, connecting screw hole 433c3, extension plate 433c4, adjustment hole 433c5, bolt 433c6;

[0044] External reinforcement plate 451, first through hole 452, support rod 453, extension rod 454, support plate 455;

[0045] A second through hole 451a;

[0046] External thread section 453a and limiting nut 453b. DETAILED DESCRIPTION

[0047] In the description of the present invention, it should be understood that the terms "upper", "lower", "inside", "outside", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are directions or positional relationships in which the product of the invention is usually placed when in use, or are directions or positional relationships commonly understood by those skilled in the art. These directions or positional relationships are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0048] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms such as "setting" and "connection" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection: it can be a mechanical connection or an electrical connection: it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] First of all, it should be pointed out that the prestressed pipe pile described in the present invention is a composite structure of steel bars and concrete, including concrete and a modeling structure composed of steel bars arranged inside the concrete, while the present invention follows the modeling structure commonly used in the art, namely, a steel cage, which is generally equipped with a certain number of longitudinal force-bearing steel bars and transverse stirrups. The prestressed pipe pile structure combines the advantages of steel structure and concrete, has high bearing capacity, high rigidity, and good ductility and durability. Therefore, it has been promoted in various types of construction projects.

[0050] In the prior art, in order to ensure the support strength of the steel cage, spot welding is mainly performed at the connection of the steel cage to resist the relative slippage between the steel bars. However, the main problem with this method is that welding is generally performed on site, and multiple people are required to perform synchronous welding on the welding points on the same horizontal line. Otherwise, there will be a large gap between the positions of the various connection points, causing torsion between the steel bars, affecting the welding quality. This leads to the problem that this method has high manpower requirements and increases the project cost.

[0051] Based on this, the present invention proposes a large-diameter prestressed pipe pile, which is mainly aimed at the structural transformation of the steel cage, and the purpose is to improve the structural strength of the large-diameter steel cage. The following is a specific embodiment:

[0052] Example 1

[0053] As attached Figure 1 As shown, this embodiment provides a large-diameter prestressed pipe pile, including a steel cage, wherein the steel cage includes a plurality of support bodies 1, a plurality of reinforcing stirrups 2, spiral stirrups 3 and a reinforcement structure 4;

[0054] The support bodies 1 are distributed in an annular pattern, and a single support body 1 includes a plurality of main ribs 11, a threaded section disposed on the end of the main ribs 11, and an internal threaded connection sleeve 12 adapted to the threaded section for connecting two adjacent main ribs 11;

[0055] That is to say, the length of the support body 1 determines the length of the steel cage, while the number and arrangement of the support bodies determine the size of the annular structure, i.e., the diameter of the steel cage. In addition, in order to save production and transportation costs, a single support body 1 is composed of multiple identical main bars 11 connected end to end, and the internal threaded connection tube 12 is responsible for connecting two adjacent main bars 11. The processing of the threaded section on the main bar 11 is an existing technology, which is generally processed by a threading machine and a sanding machine. The threading machine is used to process the thread mouth, and the sanding machine is used to grind the end; and the internal threaded connection tube 12 can also be processed in the same way.

[0056] Among them, the reinforcing stirrups 2 are distributed at intervals along the length direction of the support body 1, and a single reinforcing stirrup 2 is sleeved inside the entire support body 1; that is, the reinforcing stirrup 2 is a ring body that fits the inner annular surface of the annular structure constructed by the support body 1.

[0057] The spiral stirrup 3 is wound around the outside of the entire support body 1; that is, the spiral stirrup 3 is a stirrup wound around the outside of the annular structure constructed by the support body 1 in a coiled manner, so as to cooperate with the reinforcing stirrup 2 to enhance the connection strength. The coiling of the stirrup can be completed by using a mechanical coiling device known in the art, so it will not be described in detail.

[0058] The reinforcement structure 4 includes an internal reinforcement member 41 sleeved inside the entire internal threaded connection sleeve 12, a first connecting ring 42 arranged at the center of the internal reinforcement member 41, a second connecting ring 43 arranged at the center of the reinforcing stirrup 2, and a calibration rod 44 passing through the first connecting ring 42 and the second connecting ring 43.

[0059] That is to say, the end of the annular structure constructed by the support body 1 has a second annular structure with a slightly smaller inner diameter formed by all the internal threaded connection sleeves 12, and the main skeleton of the internal reinforcement 41 is a ring body that fits the above-mentioned second annular structure. Since the internal reinforcement 41 and the reinforcing stirrups 2 are installed under the dominant limiting effect of the support body 1, the axis of the two (i.e., the first connecting ring 42 and the second connecting ring 43) should be located on the same horizontal line parallel to the support body 1. The inventors make use of this characteristic. When assembling the steel cage, the two first connecting rings 42 and all the second connecting rings 43 located at the two ends of the support body 1 are connected by a calibration rod 44, so that the inner reinforcement member 41 and the centers of all the reinforcing stirrups 2 are located on the same axis, thereby ensuring that the annular structure formed by the support body 1 is also located on the axis; at the same time, since the first connecting ring 42 plays a role in positioning and fixing the two ends of a single support body 1, it is ensured that the connection between the single support body 1 and all the reinforcing stirrups 2 before welding is located on the same horizontal line, which not only improves the welding accuracy and avoids the generation of torque, but also saves labor costs and construction time, reduces the difficulty of construction, and has the advantages of high structural strength, high work efficiency and good economy.

[0060] Based on the above structure, this embodiment also provides a construction process, which is mainly used for building a steel cage, including the following steps:

[0061] S1. Build the inner reinforcement member 41 at the two ends of the steel cage, and set the first connecting ring 42 at the center of the inner reinforcement member 41;

[0062] S2, arranging the reinforcing stirrups 2 at intervals along the length direction of the steel cage, and arranging the second connecting ring 43 at the center of each reinforcing stirrup 2;

[0063] S3, correcting the positions of all the first connecting rings 42 and the second connecting rings 43 by the calibration rod 44 to ensure that the inner reinforcement member 41 and the reinforcing stirrup 2 are coaxial;

[0064] S4, connecting the plurality of main ribs 11 through the internal thread connection sleeves 12 to form a single support body 1, and connecting the internal thread connection sleeves 12 at both ends of the support body 1 to the two internal reinforcement members 41 respectively, until all the support bodies 1 are connected to the internal reinforcement members 41;

[0065] S5, completing the fixed connection between all the support bodies 1 and the reinforcing stirrups 2;

[0066] S6. Wrap the spiral stirrup 3 around the outside of the entire support body 1 and fix it to the support body 1.

[0067] It is understandable that the fixed connections mentioned in steps S1 to S6 can all be welded. In order to avoid the additional structures (such as the first connecting ring 42, the second connecting ring 43, the calibration rod 44, etc.) affecting the forming of the concrete and the size of the final tube body (as long as the inner diameter), the above structures must be connected to the main structure of the steel cage (support body 1, reinforcing stirrups 2, etc.) in a detachable manner, such as a bolt structure.

[0068] As a further preference of this embodiment, as shown in the attached Figure 2 and attached Figure 3 As shown, the inner reinforcement member 41 includes an inner reinforcement ring 411 and a plurality of mounting grooves 412 arranged on the inner ring surface of the inner reinforcement ring 411; the first connecting ring 42 includes a first connecting ring body 421, a plurality of first fixing grooves 422 arranged on the outer ring surface of the first connecting ring body 421, and a fixing rod 423 having one end connected to the first fixing groove 422 and the other end connected to the mounting groove 412.

[0069] As attached Figure 4 As shown, the second connecting ring 43 includes a second connecting ring body 431, a plurality of second fixing grooves 432 arranged on the outer ring surface of the second connecting ring body 431, and a connecting rod 433 connected to the second fixing groove 432 at one end and connected to the reinforcing stirrup 2 at the other end.

[0070] It is worth noting that the connection between the above-mentioned installation groove 412, the first fixing groove 422 and the fixing rod 423 is plug-in, and threads can be further processed on the groove and the rod body to achieve screw connection to improve the connection strength. The connection between the second fixing groove 432 and the connecting rod 433 can also be plug-in or screw-in. It is particularly important to note that in order not to affect the structural strength of the reinforcing stirrup 2, the connection between the connecting rod 433 and the reinforcing stirrup 2 is preferably connected by a snap-fit, which is a commonly used mechanical element in the field, so it will not be repeated in this embodiment.

[0071] Example 2

[0072] This embodiment mainly optimizes the structure of the reinforcement structure 4 based on the embodiment 1, as shown in the attached Figure 5 and attached Figure 6 As shown, the details are as follows:

[0073] The connecting rod 433 includes a rod body 433a, a connecting plate 433b arranged on the end of the rod body 433a away from the second connecting ring body 431, a first buckle plate 433c detachably connected to the connecting plate 433b, and a second buckle plate 433d detachably connected to the first buckle plate 433c to form a connecting ring for fixing the reinforcing stirrup 2.

[0074] The first gusset plate 433c has the same structure as the second gusset plate 433d. Taking the first gusset plate 433c as an example, it includes: an arc plate 433c1, two ear plates 433c2 arranged on both sides of the arc plate 433c1, a connecting screw hole 433c3 arranged on the ear plate 433c2, an extension plate 433c4 arranged on one side of the ear plate 433c2, and an adjustment hole 433c5 arranged on the extension plate 433c4. The connecting screw holes 433c3 are connected by bolts 433c6. The connecting plate 433b is provided with a positioning screw hole 433b1 matching the adjustment hole 433c5. Furthermore, the positioning screw hole 433b1 is the same as the connecting screw hole 433c3, and the positioning screw hole 433b1 is connected to the adjustment hole 433c5 by the bolts 433c6.

[0075] It is worth noting that the end of the connecting rod 433 used to connect to the reinforcing stirrup 2 is connected through the connecting plate 433b and the first buckle plate 433c, and the length of the connecting rod 433 is further adjusted by the position of the bolt 433c6 in the adjustment hole 433c5 to ensure that the reinforcing stirrup 2 is embedded in the arc groove or semicircular hole formed by the first buckle plate 433c. After the first buckle plate 433c and the second buckle plate 433d are connected by another two bolts 433c6, the connecting rod 433 is snap-fitted with the reinforcing stirrup 2, thereby realizing the snap-fit ​​connection between the two connecting rings 43 and the reinforcing stirrup 2. It is worth noting that the arc plate 433c1 can be made of steel plate or alloy material with certain bending properties. On the first hand, the shapes of the two arc plates can be adjusted to fit the reinforcing stirrups 2 as much as possible to achieve the purpose of improving the tightness of the connection; on the second hand, after the welding is completed at the connection between the reinforcing stirrups 2 and the supporting body 1, the second connecting ring body 431 and the rod body 433a are removed by releasing the connection relationship between the connecting plate 433b and the first buckle plate 433c. At this time, the two arc plates are still installed on the reinforcing stirrups 2. Taking the connection between the arc plate and the reinforcing stirrup as the base point, a first buckle plate 433c is connected to the second buckle plate 433d located on the outer peripheral side of the reinforcing stirrup 2 by bolts 433c6, and the bending performance of the arc plate 433c1 is used to make the arc plate 433c1 self-enclosed, and the nearby spiral stirrups 3 are buckled in the circle formed by the arc plate 433c1. The two ear plates 433c2 on both sides of the arc plate 433c1 are connected and fixed with bolts 433c6, and finally the single first buckle plate 433c completes the locking of the spiral stirrup 3, so that the reinforcing stirrup 2 and the spiral stirrup 3 are connected, the degree of insertion of the steel cage itself is improved, and the structural strength of the steel cage is improved.

[0076] Example 3

[0077] This embodiment mainly optimizes the structure of the reinforcement structure 4 based on the embodiment 1 or the embodiment 2. Figure 7 As shown, the details are as follows:

[0078] The reinforcement structure 4 also includes an external reinforcement member 45 arranged on the outside of the internal threaded connecting sleeve 12; the external reinforcement member 45 includes an external reinforcement plate 451 arranged on the outer peripheral surface of the internal threaded connecting sleeve 12 away from the inner reinforcement ring 411, a first through hole 452 arranged on the inner reinforcement ring 411, and a support rod 453 arranged on the outer annular surface of the first connecting ring body 421 and detachably connected to the external reinforcement plate 451 by passing through the first through hole 452.

[0079] Among them, the outer reinforcement plate 451 is preferably an arc-shaped plate, and the number is preferably three in this embodiment. The outer reinforcement plate 451 ensures as much as possible that there is enough connection area with the internal thread connection sleeve 12 to reduce the relative slip between the two. Through the synergistic effect of the outer reinforcement plate 451 and the inner reinforcement ring 411, the two sides of the internal thread connection sleeve 12 are clamped and reinforced, thereby ensuring the support effect and fixing effect of the support body 1. Furthermore, an annular groove 121 is provided on the outer peripheral side of the internal thread connection sleeve 12 to be clamped and connected with the inner reinforcement ring 411 and the outer reinforcement plate 451 to further enhance the connection strength. It is worth mentioning that the three outer reinforcement plates 451 are preferably arranged at the lower end and both sides of the inner reinforcement ring 411. The reason is that the outer reinforcement plates 451 at the lower end can reduce the interference of the ground or the workbench on the internal threaded connection sleeve 12 and prevent the internal threaded connection sleeve 12 from rolling, while the outer reinforcement plates 451 on both sides ensure the tightness between the internal threaded connection sleeve 12 and the inner reinforcement ring 411 and prevent the internal threaded connection sleeve 12 from slipping due to gravity.

[0080] In this embodiment, the outer reinforcing plate 451 is provided with a second through hole 451a for passing the support rod 453; the end of the support rod 453 away from the first connecting ring body 421 is provided with an external thread section 453a, and at least two limit nuts 453b are provided which are threadedly connected to the external thread section 453a and are located on both sides of the outer reinforcing plate 451. Such a configuration is conducive to adjusting the force of the outer reinforcing plate 451 on the internal thread connection sleeve 12 to adjust the tightening effect.

[0081] Furthermore, the outer reinforcement member 45 also includes an extension rod 454 disposed on the side of the outer reinforcement plate 451 away from the internal threaded connection sleeve 12, and a support plate 455 disposed on the extension rod 454 and parallel to the outer reinforcement plate 451. The purpose of such a setting is to raise and unify the construction height, which is convenient for the construction of the steel cage, to avoid unexpected rolling of the steel cage during the construction process, and to interfere with the construction, and to facilitate the positioning of the steel cage, to facilitate the determination of construction specifications, and to improve construction efficiency and quality.

[0082] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A large diameter prestressed pipe pile, characterized in that: The steel cage comprises a plurality of supporting bodies (1), a plurality of reinforcing stirrups (2), spiral stirrups (3) and a reinforcement structure (4); The support bodies (1) are distributed in an annular pattern, and a single support body (1) comprises a plurality of main ribs (11), a threaded section arranged on the end of the main rib (11), and an internal threaded connection sleeve (12) adapted to the threaded section and used to connect two adjacent main ribs (11); The reinforcing stirrups (2) are distributed at intervals along the length direction of the supporting body (1), and a single reinforcing stirrup (2) is sleeved inside the entire supporting body (1); The spiral stirrups (3) are coiled around the outside of the entire supporting body (1); The reinforcement structure (4) comprises an inner reinforcement member (41) sleeved inside the entire internal thread connection sleeve (12), a first connection ring (42) arranged at the center of the inner reinforcement member (41), a second connection ring (43) arranged at the center of the reinforcing stirrup (2), a calibration rod (44) passing through the first connection ring (42) and the second connection ring (43), and an outer reinforcement member (45) arranged outside the internal thread connection sleeve (12); The inner reinforcement member (41) comprises an inner reinforcement ring (411) and a plurality of mounting grooves (412) arranged on the inner ring surface of the inner reinforcement ring (411); the first connecting ring (42) comprises a first connecting ring body (421), a plurality of first fixing grooves (422) arranged on the outer ring surface of the first connecting ring body (421), and a fixing rod (423) having one end connected to the first fixing groove (422) and the other end connected to the mounting groove (412); The external reinforcement member (45) comprises an external reinforcement plate (451) arranged on the outer peripheral surface of the internal threaded connection sleeve (12) away from the internal reinforcement ring (411), a first through hole (452) arranged on the inner reinforcement ring (411), and a support rod (453) arranged on the outer annular surface of the first connection ring body (421) and detachably connected to the external reinforcement plate (451) by passing through the first through hole (452).

2. A large diameter prestressed pipe pile according to claim 1, characterized in that: The outer reinforcement plate (451) is provided with a second through hole (451a) for passing the support rod (453); an external thread section (453a) is provided on the end of the support rod (453) away from the first connecting ring body (421), and at least two limiting nuts (453b) are provided which are screwed to the external thread section (453a) and are located on both sides of the outer reinforcement plate (451).

3. The large-diameter prestressed pipe pile according to claim 1, characterized in that: The external reinforcement member (45) further comprises an extension rod (454) arranged on the side of the external reinforcement plate (451) away from the internal threaded connection sleeve (12), and a support plate (455) arranged on the extension rod (454) and parallel to the external reinforcement plate (451).

4. The large-diameter prestressed pipe pile according to claim 1, characterized in that: The second connecting ring (43) comprises a second connecting ring body (431), a plurality of second fixing grooves (432) arranged on the outer ring surface of the second connecting ring body (431), and a connecting rod (433) having one end connected to the second fixing groove (432) and the other end connected to the reinforcing stirrup (2).

5. The large-diameter prestressed pipe pile according to claim 4, characterized in that: The connecting rod (433) comprises a rod body (433a), a connecting plate (433b) arranged on the end of the rod body (433a) away from the second connecting ring body (431), a first buckle plate (433c) detachably connected to the connecting plate (433b), and a second buckle plate (433d) detachably connected to the first buckle plate (433c) to form a connecting ring for fixing the reinforcing stirrup (2).

6. The large-diameter prestressed pipe pile according to claim 5, characterized in that: The first gusset plate (433c) has the same structure as the second gusset plate (433d), and the first gusset plate (433c) comprises: an arc-shaped plate (433c1), two ear plates (433c2) arranged on both side ends of the arc-shaped plate (433c1), connecting screw holes (433c3) arranged on the ear plates (433c2), an extension plate (433c4) arranged on one side of a single ear plate (433c2), and an adjustment hole (433c5) arranged on the extension plate (433c4), wherein the connecting screw holes (433c3) are connected by bolts (433c6); and a positioning screw hole (433b1) matching the adjustment hole (433c5) is arranged on the connecting plate (433b).

7. The large-diameter prestressed pipe pile according to claim 6, characterized in that: The positioning screw hole (433b1) is the same as the connecting screw hole (433c3), and the positioning screw hole (433b1) and the adjusting hole (433c5) are connected via the bolt (433c6).

8. A construction process using the large-diameter prestressed pipe pile according to any one of claims 1 to 7, wherein the large-diameter prestressed pipe pile comprises a steel cage, characterized in that: The production of the steel cage comprises the following steps: S1, constructing the inner reinforcement member (41) at two ends of the steel cage, and setting the first connecting ring (42) at the center of the inner reinforcement member (41); S2, arranging the reinforcing stirrups (2) at intervals along the length direction of the steel cage, and arranging the second connecting ring (43) at the center of each reinforcing stirrup (2); S3, correcting the positions of all the first connecting rings (42) and the second connecting rings (43) by using the calibration rod (44) to ensure that the inner reinforcement member (41) and the reinforcing stirrup (2) are coaxial; S4, connecting a plurality of the main ribs (11) through the internal thread connection sleeves (12) to form a single support body (1), and connecting the internal thread connection sleeves (12) at both ends of the support body (1) to the two internal reinforcement members (41) respectively, until all the support bodies (1) are connected to the internal reinforcement members (41); S5, completing the fixed connection between all the supporting bodies (1) and the reinforcing stirrups (2); S6. Wrap the spiral stirrup (3) around the outside of the entire supporting body (1) and fix it to the supporting body (1).

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