Anchor plate device for prestressed steel pipe cast-in-place piles

Abstract

The present invention relates to an anchor plate device for prestressed steel pipe cast-in-place piles, which is used to cover the steel pipe cast-in-place piles and connect to the upper structure, including an intermediate plate, a plurality of outer plates abutting against the side surface of the intermediate plate, and a fastening structure connecting the intermediate plate and the outer plates, wherein the side surface of the intermediate plate is provided with an inner arc threaded surface, and the inner side surface of the outer plate is provided with an outer arc threaded surface; when the inner side surface of the outer plate abuts against the side surface of the intermediate plate, the inner arc threaded surface and the outer arc threaded surface are relatively spliced ​​to form a threaded connection hole, and the threaded connection hole is used to connect with the steel bars of the upper structure; the plate surface of the intermediate plate and / or the outer plate is provided with a prestressed tendon through hole and a pouring through hole. The anchor plate device of the present invention has a simple and stable structure, adopts an assembled structure, does not require welding, has good anchoring performance, and can realize the two functions of connecting the upper structure with the pile foundation and anchoring the prestressed tendons.

Description

Technical Field

[0001] The invention relates to the field of steel pipe cast-in-place piles, and in particular to an anchor plate device for prestressed steel pipe cast-in-place piles. Background Art

[0002] In recent years, my country's civil engineering construction has been booming, and higher requirements have been put forward for pile foundation design. In order to improve the bearing capacity of pile foundation under complex site conditions, reduce cracks and improve stress performance, prestressed steel pipe cast-in-place piles are introduced.

[0003] For prestressed steel pipe cast-in-place piles, how to effectively connect the pile foundation with the superstructure has always been a difficult problem facing designers, especially when the anchorage of prestressed tendons needs to be considered at the same time.

[0004] There are currently two common practices for pull-out piles: 1. When using inserted steel bars, they need to be evenly arranged around the pile. The length of the steel bars inserted into the pipe pile should be the same as the depth of the core concrete pouring, and should not be less than 2.9 meters; the length of the anchor into the cap should not be less than 40 times the diameter of the steel bar. This method is complex to construct, with a large workload at sea, and a channel for inserted steel bars needs to be reserved. 2. When the longitudinal prestressed steel bars of the pile are directly anchored to the cap, the anchorage length shall not be less than 150 times the diameter of the longitudinal steel bars and not less than 1500mm. This method generally requires a long anchorage length, and the prestressed bars are complex to bear. At the same time, both methods have the problem of easily causing congestion in the steel bar anchorage and difficulty in pouring concrete, slow progress in the steel bar project, and difficulty in ensuring the quality of the project. Summary of the invention

[0005] In view of the shortcomings of the prior art mentioned above, the technical problem to be solved by the present invention is to provide an anchor plate device for prestressed steel pipe cast-in-place piles, which has a simple structure, is easy and flexible to use, has good anchoring performance, does not require welding and complicated anchoring operations, and can achieve two major functions: connecting the superstructure with the pile foundation and anchoring the prestressed tendons.

[0006] To achieve the above-mentioned purpose, the present invention provides an anchor plate device for prestressed steel pipe cast-in-place piles, which is used to cover the steel pipe cast-in-place piles and connect to the upper structure, including an intermediate plate, a plurality of outer plates abutting against the side surface of the intermediate plate, and a fastening structure connecting the intermediate plate and the outer plates, wherein the side surface of the intermediate plate is provided with an inner circular arc threaded surface, and the inner side surface of the outer plate is provided with an outer circular arc threaded surface; when the inner side surface of the outer plate abuts against the side surface of the intermediate plate, the inner circular arc threaded surface and the outer circular arc threaded surface are relatively spliced ​​to form a threaded connection hole, and the threaded connection hole is used to connect to the steel bars of the upper structure; the plate surface of the intermediate plate and / or the outer plate is provided with a prestressed tendon through hole and a pouring through hole.

[0007] Furthermore, an inner-petal extension sleeve is fixedly provided on the side surface of the middle plate, the outer peripheral wall of the inner-petal extension sleeve is fixedly connected to the middle plate, and the inner hole wall forms an inner arc threaded surface, and an outer-petal extension sleeve is fixedly provided on the inner side surface of the outer plate, the outer peripheral wall of the outer-petal extension sleeve is fixedly connected to the outer plate, and the inner hole wall forms an outer arc threaded surface, and an extension sleeve is formed when the inner-petal extension sleeve is connected to the outer-petal extension sleeve.

[0008] Furthermore, it also includes a reinforcement ring, which is sleeved on an extension sleeve consisting of an inner petal extension sleeve and an outer petal extension sleeve.

[0009] Furthermore, the middle plate is circular, the prestressed tendon through holes and pouring through holes are provided on the middle plate, there are two outer plates, which are symmetrically abutted on both sides of the middle plate, and the inner side surfaces of the outer plates are arc-shaped and matched with the side surfaces of the middle plate.

[0010] Furthermore, the pouring through hole is arranged at the center of the middle plate, and the prestressed tendon through holes are multiple and arranged in a circular array with the center of the middle plate as the center.

[0011] Furthermore, it also includes a cap edge arranged on the outer edge of the outer plate, the cap edge is located on the lower plate surface of the outer plate for connecting with the steel pipe cast-in-place pile, and the cap edge is used to be close to the outer peripheral wall of the steel pipe cast-in-place pile.

[0012] Furthermore, the cast-in-place steel pipe pile is cylindrical, and the outer plate is semi-annular.

[0013] Furthermore, a connecting and fixing structure is provided between two adjacent outer plates, for fixing the two outer plates together.

[0014] Furthermore, the fastening structures are multiple and are arranged in a circular shape with the center of the middle plate as the center.

[0015] Furthermore, the fastening structure includes an inner threaded fastening hole arranged on the surface of the middle plate, an outer threaded fastening hole arranged on the surface of the outer plate, and a connecting component, the connecting component includes a connecting plate, and an inner fastening bolt and an outer fastening bolt passed through the connecting plate, the inner fastening bolt and the outer fastening bolt are respectively tightened in the inner threaded fastening hole and the outer threaded fastening hole.

[0016] As described above, the anchor plate device according to the present invention has the following beneficial effects:

[0017] By setting up the middle plate, multiple outer plates, fastening structure, and prestressed tendon through holes and pouring holes, when in use, the upper structure steel bar is pre-threaded, the upper structure steel bar is inserted into the inner arc thread surface of the middle plate, and then the outer plate is connected to the side surface of the middle plate, and the outer arc thread surface on the outer plate is buckled on the upper structure steel bar, so that the upper structure steel bar is inserted into the threaded connection hole; the middle plate and the outer plate are fixedly connected by the fastening structure. The upper part of the prestressed tendon passes through the prestressed tendon through hole, and the prestressed tendon is lowered into the steel pipe cast-in-place pile together, and the anchor plate device cover is placed on the top of the steel pipe cast-in-place pile; pouring is carried out through the pouring hole, and grouting is poured to the bottom surface of the anchor plate. When the concrete strength reaches a certain required value, the prestressed tendon is tensioned and anchored, so that the anchor plate device completes the two functions of connecting the upper structure with the pile foundation and anchoring the prestressed tendon. The anchor plate device of the present invention has a simple and stable structure, adopts an assembled structure, is easy to assemble, does not require offshore welding, has a simple process during use, is easy to operate, and has controllable quality; and has good anchoring performance, can give full play to the strength of the prestressed steel bars, and the steel pipe piles will provide sufficient rigidity during tensioning, so no temporary skeleton is required, and can achieve the two major functions of connecting the upper structure with the pile foundation and anchoring the prestressed bars. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the anchor plate device of the present invention.

[0019] Figure 2 It is a structural schematic diagram of the anchor plate device of the present invention from another perspective.

[0020] Figure 3 It is a schematic diagram of the structure of the connection component in the present invention.

[0021] Figure 4 It is a working schematic diagram of the anchor plate device of the present invention.

[0022] Component number description

[0023] 1 Outer plate

[0024] 11 Outer valve extension sleeve

[0025] 12 External threaded fastening holes

[0026] 13 Hat brim

[0027] 2 Middle Plate

[0028] 21 Inner valve extension sleeve

[0029] 22 Internal threaded fastening hole

[0030] 3 Prestressed tendon through hole

[0031] 4 Watering perforation

[0032] 5 Connecting components

[0033] 51 Connecting plate

[0034] 52 Inner fastening bolt

[0035] 53 Outer fastening bolt

[0036] 6 Reinforcement ring

[0037] 7 Connect the fixed structure

[0038] 8 Superstructure reinforcement

[0039] 9 Prestressed tendons

[0040] 10 Steel pipe cast-in-place piles DETAILED DESCRIPTION

[0041] The following is a description of the implementation of the present invention by means of specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0042] It should be noted that the structures, proportions, sizes, etc. drawn in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change of the proportional relationship or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the effects and purposes that can be achieved by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and so on quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. The change or adjustment of their relative relationship should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0043] like Figures 1 to 4 As shown, the present invention provides an anchor plate device for prestressed steel pipe cast-in-place piles, which is used to cover the steel pipe cast-in-place piles 10 and connect to the upper structure, such as Figure 1 As shown, the upper structure can be various structures located above the steel pipe cast-in-place pile 10, such as a cap, etc. The upper structure has upper structure steel bars 8 for connecting with the anchor plate device.

[0044] The anchor plate device of the present invention comprises an intermediate plate 2, a plurality of outer plates 1 abutting against the side surface of the intermediate plate 2, and a fastening structure connecting the intermediate plate 2 and the outer plates 1, wherein an inner arc threaded surface is provided on the side surface of the intermediate plate 2, and an outer arc threaded surface is provided on the inner side surface of the outer plate 1; when the inner side surface of the outer plate 1 abuts against the side surface of the intermediate plate 2, the inner arc threaded surface and the outer arc threaded surface are relatively spliced ​​to form a threaded connection hole, and the threaded connection hole is used to connect with the upper structure steel bar 8; the plate surface of the intermediate plate 2 and / or the outer plate 1 is provided with a prestressed bar through hole 3 and a pouring through hole 4. Specifically, the thread on the outer arc threaded surface is adapted to the thread on the inner arc threaded surface, and the number and distribution of the threaded connection holes match the number and distribution of the upper structure steel bars 8.

[0045] The basic working principle of the anchor plate device of the present invention is as follows: before use, the anchor plate device is in an unassembled state, and the middle plate 2 and the outer plate 1 are separated; the upper structure steel bar 8 that needs to be inserted into the anchor plate is pre-threaded with a special thread tool, and the external thread is compatible with the thread on the outer arc thread surface and the thread on the inner arc thread surface. Then the upper structure steel bar 8 is inserted into the inner arc thread surface of the middle plate 2 and the thread is kept in line, and then the outer plate 1 is connected to the side surface of the middle plate 2, and the outer arc thread surface on the outer plate 1 is buckled on the upper structure steel bar 8, and the outer arc thread surface is aligned with the inner arc thread surface to form a threaded connection hole, so that the upper structure steel bar 8 is inserted into the threaded connection hole, and the two are kept in threaded connection; the middle plate 2 and the outer plate 1 are fixedly connected by a fastening structure. The shape of the middle plate 2 and the shape and number of the outer plates 1 can be selected according to the actual situation, such as the shape and size of the steel pipe pile 10, and the size and number of the upper structure steel bars 8, to ensure that after the middle plate 2 and the outer plate 1 are assembled, the anchor plate device can cover the upper end of the steel pipe pile 10. Figure 4 As shown. The upper part of the prestressed tendon 9 is passed through the prestressed tendon through hole 3, and an additional lower anchor plate can be installed at the lower end of the prestressed tendon 9 to stabilize it, ensuring that there is no offset between multiple prestressed tendons 9. The prestressed tendons 9 are lowered together into the steel pipe cast-in-place pile 10, and the anchor plate device cover is against the top of the steel pipe cast-in-place pile 10; then pouring is carried out through the pouring perforation 4, and grouting is poured to the bottom surface of the anchor plate. When the concrete strength reaches a certain required value (for example, 75% of the design value), the prestressed tendon 9 is tensioned and anchored. At the end of this step, the anchor plate device has completed the two major functions of connecting the superstructure with the pile foundation and anchoring the prestressed tendon 9.

[0046] The anchor plate device of the present invention has a simple and stable structure, adopts an assembled structure, is easy to assemble, does not require offshore welding, has a simple process during use, is easy to operate, and has controllable quality; and has good anchoring performance, can give full play to the strength of the prestressed steel bars, and the steel pipe piles will provide sufficient rigidity during tensioning, so there is no need for a temporary skeleton, and can achieve the two major functions of connecting the upper structure with the pile foundation and anchoring the prestressed bars 9.

[0047] As a preferred design, in this embodiment, Figure 1 and Figure 2 As shown, an inner-petal extension sleeve 21 is fixedly provided on the side surface of the middle plate 2, the outer peripheral wall of the inner-petal extension sleeve 21 is fixedly connected to the middle plate 2, and the inner hole wall forms an inner arc threaded surface, and an outer-petal extension sleeve 11 is fixedly provided on the inner side surface of the outer plate 1, the outer peripheral wall of the outer-petal extension sleeve 11 is fixedly connected to the outer plate 1, and the inner hole wall forms an outer arc threaded surface, and the inner-petal extension sleeve 21 and the outer-petal extension sleeve 11 are connected to form an extension sleeve, that is, the outer-petal extension sleeve 11 and the inner-petal extension sleeve 21 are obtained by cutting a complete extension sleeve, and the inner hole of the extension sleeve forms a threaded connection hole. When the thickness of the middle plate 2 and the outer plate 1 is constant, the threaded connection length between the upper structure steel bar 8 and the anchor plate device is increased by the inner-petal extension sleeve 21 and the outer-petal extension sleeve 11, thereby ensuring the stability of the connection between the upper structure steel bar 8 and the anchor plate device. Further preferably, as Figure 1 As shown, it also includes a reinforcement ring 6, which is sleeved on the extension sleeve composed of the inner petal extension sleeve 21 and the outer petal extension sleeve 11 to play a further stabilizing role.

[0048] In the present invention, the prestressed tendon through holes 3 and the pouring through holes 4 can be opened on the plate surface of the middle plate 2 and / or the outer plate 1 according to actual conditions. Figure 1 and Figure 2 As shown, the middle plate 2 is circular, the prestressed tendon through hole 3 and the pouring through hole 4 are provided on the middle plate 2, there are two outer plates 1, and they are symmetrically connected to the two sides of the middle plate 2, the inner side surface of the outer plate 1 is arc-shaped, and is adapted to the side surface of the middle plate 2, so that when assembled, the arc-shaped inner side surfaces of the two outer plates 1 are perfectly fitted with the side surface of the middle plate 2, and the two outer plates 1 are symmetrically arranged, using fewer parts, convenient installation, and strong stability. And preferably, in this embodiment, the pouring through hole 4 is set at the center of the middle plate 2, and the prestressed tendon through hole 3 is multiple, and is arranged in a circular array with the center of the middle plate 2 as the center, so as to ensure that the overall strength of the anchor plate device is guaranteed while saving materials, and the prestressed tendon through hole 3 is arranged in a circular array, which ensures that the force is uniform when the prestressed tendon 9 is tensioned, and the stability is strong.

[0049] The overall size and shape of the middle plate 2 and the outer plate 1 after being spliced ​​in the present invention can be matched according to the outer contour of the steel pipe cast-in-place pile 10. In the present embodiment, the steel pipe cast-in-place pile 10 is cylindrical, and the outer plate 1 is preferably semi-annular, which is well matched with the steel pipe cast-in-place pile 10 and reduces the use of materials. As a preferred design, in the present embodiment, the anchor plate device also includes a brim 13 arranged on the outer edge of the outer plate 1. The brim 13 is located on the lower plate surface of the outer plate 1 for connecting with the steel pipe cast-in-place pile 10. The brim 13 is used to abut against the outer peripheral wall of the steel pipe cast-in-place pile 10. Specifically, the brim 13 is perpendicular to the lower plate surface of the outer plate 1, such as Figure 4 As shown, when the assembled anchor plate device is covered on the steel pipe cast-in-place pile 10, the lower plate surface of the outer plate 1 is pressed on the upper end of the steel pipe cast-in-place pile 10, and the cap edge 13 is tightly attached to the outer peripheral wall of the steel pipe cast-in-place pile 10, thereby realizing the positioning and fixation of the anchor plate device and the steel pipe cast-in-place pile 10.

[0050] As a preferred design, Figure 1 and Figure 2 As shown, a connection fixing structure 7 is further provided between two adjacent outer panels 1, for fixing the two outer panels 1 together. Specifically, in this embodiment, a connection fixing structure 7 is provided at the joint of the two outer panels 1, for fixing the two outer panels 1 together. The connection fixing structure 7 can specifically adopt a variety of existing connection methods. Specifically, in this embodiment, the connection fixing structure 7 includes threaded holes provided on the two outer panels 1, and is fixedly connected by bolts.

[0051] As a preferred design, in this embodiment, Figure 1 , Figure 2 and Figure 3As shown, the fastening structure includes an inner threaded fastening hole 22 arranged on the plate surface of the middle plate 2, an outer threaded fastening hole 12 arranged on the plate surface of the outer plate 1, and a connecting component 5. The connecting component 5 includes a connecting plate 51, and an inner fastening bolt 52 and an outer fastening bolt 53 penetrated in the connecting plate 51. When in use, after the middle plate 2 and the outer plate 1 are spliced, the inner fastening bolt 52 and the outer fastening bolt 53 are tightened in the inner threaded fastening hole 22 and the outer threaded fastening hole 12 respectively, so as to complete the fixing of the middle plate 2 and the outer plate 1. The operation is convenient and the structure is simple. Further preferably, the fastening structure is multiple and arranged in a circular array with the center of the middle plate 2 as the center. In this embodiment, the inner threaded fastening holes 22 are arranged in a circular array with the center of the middle plate 2 as the center near the side of the middle plate 2, and the outer threaded fastening holes 12 are arranged in a circular array with the center of the annular outer plate 1 as the center near the inner side of the outer plate 1, so as to ensure that the connection between the middle plate 2 and the outer plate 1 is stable and uniform, and the stability of the anchor plate device is improved. Of course, in other embodiments, the fastening structure can also adopt other commonly used structures, which can achieve the above-mentioned fixed connection between the middle plate 2 and the outer plate 1.

[0052] refer to Figures 1 to 4 As shown, taking the anchor plate device in this embodiment as an example, the specific use process of the anchor plate device in this embodiment is as follows:

[0053] 1) Before use, the anchor plate device is in an unassembled state, and the middle plate 2 and the two outer plates 1 are separated; the upper structure steel bar 8 to be inserted into the anchor plate is pre-threaded with a special thread tool, and the external thread on the upper structure steel bar 8 is adapted to the thread of the threaded connection hole in the extension sleeve.

[0054] 2) Insert the upper structure steel bar 8 into the inner hole wall of the inner petal extension sleeve 21 on the middle plate 2 and keep the threaded fit, then symmetrically connect the two annular outer plates 1 on both sides of the middle plate 2, and connect the inner hole wall of the outer petal extension sleeve 11 on the outer plate 1 to the other part of the upper structure steel bar 8, and ensure that the outer petal extension sleeve 11 is aligned with the inner petal extension sleeve 21 to form a complete extension sleeve, so that the upper structure steel bar 8 is inserted into the extension sleeve and keeps the threaded connection,

[0055] 3) Install multiple fastening structures. Specifically, tighten the inner fastening bolts 52 and the outer fastening bolts 53 in the connecting assembly 5 into the inner threaded fastening holes 22 and the outer threaded fastening holes 12 respectively, so as to fix the middle plate 2 and the outer plate 1 together. At the same time, install the connecting and fixing structure 7 at the connection between the two outer plates 1 for further fixing, and then put the reinforcing rings 6 on the threaded extension sleeves one by one. At this time, the splicing and assembly of the anchor plate device is completed.

[0056] 4) Pass the upper parts of the plurality of prestressed tendons 9 through the prestressed tendon through holes 3, and an additional lower anchor plate can be installed at the lower end of the prestressed tendons 9 for stabilization; then lower the prestressed tendons 9 together into the steel pipe cast-in-place pile 10, and the anchor plate device is sleeved on the steel pipe cast-in-place pile 10, and the anchor plate device is pressed against the top of the steel pipe cast-in-place pile 10, and the cap edge 13 is attached to the outer peripheral wall of the steel pipe cast-in-place pile 10 for fixing;

[0057] 5) Grouting is performed through the pouring holes 4 to the lower surface of the middle plate 2 and the outer plate 1. When the concrete strength reaches 75% of the design value, the prestressed tendons 9 are tensioned and anchored. At the end of this step, the anchor plate device has completed the two functions of connecting the upper structure with the pile foundation and anchoring the prestressed tendons 9.

[0058] As can be seen from the above, the anchor plate device in this embodiment has a simple and stable structure, and adopts an assembled structure to ensure the overall strength with less consumables; it is easy to assemble, and no welding is required. The process is simple when in use, and the stability is strong. The quality is controllable, which can speed up the construction progress of the steel bar project and improve efficiency; and when the prestressed tendons 9 are stretched, the force is uniform, the anchoring performance is good, and the strength of the prestressed steel bars can be fully utilized. No temporary skeleton is required, and the two major functions of connecting the upper structure with the pile foundation and anchoring the prestressed tendons 9 can be achieved, overcoming the problems of crowded anchoring of traditional bent tendons and difficulties in concrete pouring, and improving the quality of the project. A hole is opened in the middle of the anchor plate device, which is used as a grouting channel and saves materials at the same time.

[0059] In summary, the invention effectively overcomes various shortcomings in the prior art and has high industrial utilization value.

[0060] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. An anchor plate device for a prestressed steel pipe cast-in-place pile, used to cover the steel pipe cast-in-place pile (10) and connected to the upper structure, characterized in that: The invention comprises a middle plate (2), a plurality of outer plates (1) abutting against the side surface of the middle plate (2), and a fastening structure connecting the middle plate (2) and the outer plates (1), wherein the side surface of the middle plate (2) is provided with an inner arc threaded surface, and the inner side surface of the outer plate (1) is provided with an outer arc threaded surface; when the inner side surface of the outer plate (1) abuts against the side surface of the middle plate (2), the inner arc threaded surface and the outer arc threaded surface are spliced ​​relative to each other to form a threaded connection hole, and the threaded connection hole is used to connect with the upper structure steel bar (8); the plate surface of the middle plate (2) and / or the outer plate (1) is provided with a prestressed bar through hole (3) and a pouring through hole (4); the middle plate An inner-petal extension sleeve (21) is fixedly provided on the side surface of the intermediate plate (2), the outer peripheral wall of the inner-petal extension sleeve (21) is fixedly connected to the intermediate plate (2), and the inner hole wall forms an inner arc thread surface; an outer-petal extension sleeve (11) is fixedly provided on the inner side surface of the outer plate (1), the outer peripheral wall of the outer-petal extension sleeve (11) is fixedly connected to the outer plate (1), and the inner hole wall forms an outer arc thread surface; an extension sleeve is formed when the inner-petal extension sleeve (21) and the outer-petal extension sleeve (11) are connected to each other; and a reinforcement ring (6) is also included, and the reinforcement ring (6) is sleeved on the extension sleeve formed by the inner-petal extension sleeve (21) and the outer-petal extension sleeve (11); the intermediate plate (2) is circular, and the The prestressed tendon through hole (3) and the pouring through hole (4) are provided on the middle plate (2); the outer plates (1) are two and symmetrically abutted on both sides of the middle plate (2); the inner side surface of the outer plate (1) is arc-shaped and matches the side surface of the middle plate (2); the fastening structure is multiple and arranged in a circular array with the center of the middle plate (2) as the center; the fastening structure comprises an inner threaded fastening hole (22) provided on the plate surface of the middle plate (2), an outer threaded fastening hole (12) provided on the plate surface of the outer plate (1), and a connecting assembly (5); the connecting assembly (5) comprises a connecting plate (51) and an inner fastening bolt inserted in the connecting plate (51). (52) and an outer fastening bolt (53), the inner fastening bolt (52) and the outer fastening bolt (53) being respectively tightened in the inner threaded fastening hole (22) and the outer threaded fastening hole (12); when the anchor plate device is connected to the upper structure steel bar (8), the upper structure steel bar (8) is inserted into the inner hole wall of the inner petal extension sleeve (21) on the middle plate (2) and the threads are kept in engagement, and then the two outer plates (1) are symmetrically connected to the two sides of the middle plate (2), the inner hole wall of the outer petal extension sleeve (11) on the outer plate (1) is clamped on the other part of the upper structure steel bar (8), and the outer petal extension sleeve (11) is aligned with the inner petal extension sleeve (21) to form a complete extension sleeve.

2. The anchor plate device according to claim 1, characterized in that: The pouring through hole (4) is arranged at the center of the middle plate (2), and the prestressed tendon through holes (3) are multiple and arranged in a circular array with the center of the middle plate (2) as the center.

3. The anchor plate device according to claim 1, characterized in that: It also includes a cap edge (13) arranged on the outer edge of the outer plate (1), the cap edge (13) being located on the lower plate surface of the outer plate (1) for connecting with the steel pipe cast-in-place pile (10), and the cap edge (13) being used to abut against the outer peripheral wall of the steel pipe cast-in-place pile (10).

4. The anchor plate device according to claim 1, characterized in that: The steel pipe cast-in-place pile (10) is cylindrical, and the outer plate (1) is semi-annular.

5. The anchor plate device according to claim 1, characterized in that: A connecting and fixing structure (7) is also provided between two adjacent outer panels (1) and is used to fix the two outer panels (1) together.

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