Bridge concrete guardrail root reinforcing structure

Abstract

The utility model discloses a bridge concrete guardrail root reinforcing structure, and relates to the technical field of bridge concrete guardrails, the bridge concrete guardrail root reinforcing structure comprises a prefabricated concrete anti-collision guardrail and an installation assembly, the installation assembly comprises a pre-buried butt joint unit, a vertical reinforcing unit and an inclined tension unit; the vertical reinforcing unit and the inclined tension unit are installed at the top of the pre-embedded fixing unit, and the pre-embedded fixing unit is used for being pre-embedded and fixed to a bridge, so that positioning butt joint of the prefabricated concrete anti-collision guardrail is facilitated; the vertical reinforcing unit is used for vertically fixing and reinforcing the prefabricated concrete anti-collision guardrail; the inclined tension unit is used for providing tension obliquely facing the surface of the bridge for the prefabricated concrete anti-collision guardrail. According to the prefabricated concrete anti-collision guardrail installation structure, the prefabricated concrete anti-collision guardrail can be conveniently and rapidly installed and fixed through the installation assembly, vertical reinforcement and obliquely-downward pulling force can be provided for the prefabricated concrete anti-collision guardrail, and the prefabricated concrete anti-collision guardrail can be installed more stably.

Description

Technical Field

[0001] This utility model relates to the field of bridge concrete guardrail technology, specifically a bridge concrete guardrail root reinforcement structure. Background Technology

[0002] Concrete bridge railings are important protective structures in bridge engineering. Their main function is to prevent vehicles from going off the road in the event of an accident, protect the safety of the bridge and pedestrians, and also enhance the overall aesthetics of the bridge.

[0003] Traditional bridge concrete guardrails are generally constructed by cast-in-place, requiring on-site reinforcement binding, formwork erection, and pouring. This method is difficult, time-consuming, and the quality is hard to guarantee. Therefore, a precast concrete crash barrier construction method has emerged. Precast concrete crash barriers can effectively reduce the construction period and improve efficiency. At the same time, precast concrete crash barriers have uniform standards and quality assurance, which can ensure the consistency and stability of construction quality. They can also reduce the materials and manpower required for on-site construction, thereby reducing project costs.

[0004] When constructing precast concrete crash barriers, the connection between the precast concrete crash barriers and the bridge is crucial. Based on this, a reinforcement structure for the root of bridge concrete guardrails is provided. Utility Model Content

[0005] The purpose of this utility model is to provide a reinforcement structure for the base of a bridge concrete guardrail in order to achieve a stable connection between the precast concrete crash barrier and the bridge.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a bridge concrete guardrail root reinforcement structure, including a precast concrete crash barrier and an installation component, wherein the precast concrete crash barrier is composed of a precast guardrail body, a first connecting straight groove, a second connecting straight groove, a vertical reinforcement hole, and an inclined reinforcement hole.

[0007] The first and second straight grooves are formed at the bottom of the prefabricated guardrail body, and the vertical and inclined reinforcing holes penetrate from the top of the prefabricated guardrail body into the first and second straight grooves respectively.

[0008] The installation components are pre-embedded in the bridge and are used to connect with the first and second docking straight grooves to achieve the positioning and installation of the precast concrete crash barrier.

[0009] The installation components include a pre-embedded docking unit, a vertical reinforcement unit, and an inclined tension unit;

[0010] The vertical reinforcement unit and the inclined tension unit are installed on the top of the pre-embedded fixing unit. The pre-embedded fixing unit is used to fix the bridge to the pre-embedded parts so as to position and connect the precast concrete crash barrier.

[0011] The vertical reinforcement unit is used to achieve vertical fixation and reinforcement of the precast concrete crash barrier;

[0012] The inclined tension unit is used to provide a tension force inclined toward the bridge surface for the precast concrete crash barrier.

[0013] As a further embodiment of this utility model: the pre-embedded docking unit includes a pre-embedded base plate, a top plate, a T-shaped connecting column, a rectangular docking seat, and a trapezoidal docking seat;

[0014] The top plate is distributed on the top of the embedded base plate. The T-shaped connecting column passes through the top of the top plate to the bottom of the top plate and is fixedly connected to the top of the embedded base plate. The T-shaped connecting column is fixedly connected to the top plate. The embedded base plate is embedded and fixed on the bridge. The upper surface of the top plate is flush with the upper surface of the bridge.

[0015] The rectangular docking seat and the trapezoidal docking seat are fixed to the upper surface of the top plate in sequence, and the top of the T-shaped connecting column is located inside the rectangular docking seat and the trapezoidal docking seat respectively;

[0016] When the prefabricated guardrail body is placed on the upper surface of the top plate, it is initially positioned by connecting the first and second straight grooves with the rectangular and trapezoidal docking seats, respectively.

[0017] As a further embodiment of this utility model: the vertical reinforcement unit includes a vertical nut and a vertical reinforcement screw;

[0018] The vertical nut is welded and fixed to the top of the inner wall of the rectangular mating seat, and the top of the rectangular mating seat has a through hole that passes through the vertical nut. The vertical nut and the vertical reinforcing hole are aligned vertically.

[0019] The vertical reinforcing screw passes through the top of the vertical reinforcing hole and is threadedly connected to the vertical nut for fixation, thereby achieving vertical fixation and reinforcement of the prefabricated guardrail body.

[0020] As a further embodiment of this utility model: the inclined tension unit includes an inclined nut and an inclined reinforcing screw;

[0021] The inclined nut is fixed to the inner side of the inclined surface of the vertical reinforcing screw. The inclined surface of the vertical reinforcing screw has a through hole that communicates with the inclined nut, and the through hole on the vertical reinforcing screw is inclinedly aligned with the inclined reinforcing hole.

[0022] The inclined reinforcing screw passes through the inclined reinforcing hole from the top and is threadedly connected to the inclined nut, and is used to provide a tensile force inclined towards the bridge for the prefabricated guardrail body.

[0023] As a further embodiment of this utility model: multiple vertical reinforcing holes and inclined reinforcing holes are provided in the horizontal direction and are staggered with each other; the number and position of the vertical nuts and trapezoidal mating seats are respectively matched with the number and position of the vertical reinforcing holes and inclined reinforcing holes.

[0024] As a further embodiment of this utility model: a positioning groove is provided at both ends of the outer wall of the prefabricated guardrail body at a position that is aligned with the first and second straight docking grooves, and the inner wall dimension of the positioning groove is larger than the inner wall dimension of the first and second straight docking grooves;

[0025] The outer wall dimensions of the rectangular docking seat and the trapezoidal docking seat are smaller than the inner wall dimensions of the first docking straight groove and the second docking straight groove, and the top and bottom sides of the rectangular docking seat and the inclined surface and bottom sides of the trapezoidal docking seat are provided with a number of slurry grooves.

[0026] The rectangular docking seat and the trapezoidal docking seat are fixed with positioning sealing plates at both ends, and the outer wall size of the positioning sealing plate matches the inner wall size of the positioning groove.

[0027] As a further improvement of this utility model: the vertical reinforcement hole and the inclined reinforcement hole are both composed of a receiving groove, a through hole and a grouting hole;

[0028] The storage groove is formed on the top of the prefabricated guardrail body, the through hole is formed on the bottom of the storage groove and is respectively connected to the interior of the first docking straight groove and the second docking straight groove, and multiple grouting holes are arranged in a ring around the center of the through hole. The multiple grouting holes are connected to the through hole and the storage groove, and their bottoms are respectively connected to the first docking straight groove and the second docking straight groove.

[0029] Compared with the prior art, the beneficial effects of this utility model are:

[0030] By setting up installation components, precast concrete crash barriers can be easily installed and fixed, and vertical reinforcement and downward tilting tension can be provided, making the installation of precast concrete crash barriers more stable. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of this utility model;

[0032] Figure 2 This is a structural cross-sectional view of the connection between the vertical reinforcing screw and the vertical nut of this utility model;

[0033] Figure 3 This is a cross-sectional view of the vertical reinforcing screw and the vertical nut of this utility model in a disassembled state;

[0034] Figure 4This is a structural cross-sectional view of the inclined reinforcing screw and the inclined nut of this utility model in their connection state;

[0035] Figure 5 This is a cross-sectional view of the tilted reinforcing screw and tilted nut of this utility model in a disassembled state;

[0036] Figure 6 This is a schematic diagram showing the disassembled installation components and precast concrete crash barrier of this utility model.

[0037] Figure 7 This is a top view of the structure of the vertical reinforcing hole and the inclined reinforcing hole of this utility model;

[0038] Figure 8 This is a partial disassembly diagram of the mounting assembly of this utility model.

[0039] In the diagram: 1. Precast concrete crash barrier; 101. Precast barrier body; 102. First connecting straight groove; 103. Second connecting straight groove; 104. Positioning groove; 105a. Vertical reinforcement hole; 105b. Inclined reinforcement hole; 1051. Storage groove; 1052. Through hole; 1053. Grouting hole; 2. Installation components; 201. Embedded base plate; 202. Top plate; 203. T-shaped connecting column; 204. Rectangular connecting seat; 205. Vertical nut; 206. Vertical reinforcement bolt; 207. Trapezoidal connecting seat; 208. Inclined nut; 209. Inclined reinforcement bolt; 210. Positioning sealing plate; 211. Grouting channel opening. Detailed Implementation

[0040] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0041] Please see Figures 1-8 In this embodiment of the utility model, a bridge concrete guardrail root reinforcement structure includes a precast concrete crash barrier 1 and an installation component 2. The precast concrete crash barrier 1 is composed of a precast guardrail body 101, a first connecting straight groove 102, a second connecting straight groove 103, a vertical reinforcement hole 105a, and an inclined reinforcement hole 105b.

[0042] The first straight groove 102 and the second straight groove 103 are formed at the bottom of the prefabricated guardrail body 101. The vertical reinforcement hole 105a and the inclined reinforcement hole 105b pass through the top of the prefabricated guardrail body 101 and respectively into the interior of the first straight groove 102 and the second straight groove 103.

[0043] The mounting component 2 is pre-embedded in the bridge and is used to connect with the first docking straight groove 102 and the second docking straight groove 103 to realize the positioning and installation of the precast concrete crash barrier 1;

[0044] Installation component 2 includes a pre-embedded docking unit, a vertical reinforcement unit, and an inclined tension unit;

[0045] Vertical reinforcement units and inclined tension units are installed on top of the pre-embedded fixing units. The pre-embedded fixing units are used to fix the bridge to the pre-embedded parts so as to position and connect the precast concrete crash barrier 1.

[0046] The vertical reinforcement unit is used to achieve vertical fixation and reinforcement of the precast concrete crash barrier 1;

[0047] The inclined tension unit is used to provide an inclined tension toward the bridge surface for the precast concrete crash barrier 1;

[0048] The pre-embedded docking unit includes a pre-embedded base plate 201, a top plate 202, a T-shaped connecting column 203, a rectangular docking seat 204, and a trapezoidal docking seat 207;

[0049] The top plate 202 is distributed on the top of the embedded base plate 201. The T-shaped connecting column 203 passes through the top of the top plate 202 to the bottom of the top plate 202 and is fixedly connected to the top of the embedded base plate 201. The T-shaped connecting column 203 is fixedly connected to the top plate 202. The embedded base plate 201 is embedded and fixed on the bridge. The upper surface of the top plate 202 is flush with the upper surface of the bridge.

[0050] The rectangular docking seat 204 and the trapezoidal docking seat 207 are fixed to the upper surface of the top plate 202 in sequence, and the top of the T-shaped connecting column 203 is located inside the rectangular docking seat 204 and the trapezoidal docking seat 207 respectively.

[0051] When the prefabricated guardrail body 101 is placed on the upper surface of the top plate 202, it is initially positioned by connecting the first straight groove 102 and the second straight groove 103 with the rectangular docking seat 204 and the trapezoidal docking seat 207 respectively.

[0052] The vertical reinforcement unit includes a vertical nut 205 and a vertical reinforcement screw 206;

[0053] The vertical nut 205 is welded and fixed to the top of the inner wall of the rectangular mating seat 204, and the top of the rectangular mating seat 204 is provided with a through hole that passes through the vertical nut 205. The vertical nut 205 and the vertical reinforcing hole 105a are aligned vertically.

[0054] The vertical reinforcing screw 206 passes through the top of the vertical reinforcing hole 105a and is threadedly connected to the vertical nut 205 for fixing, thereby achieving vertical fixing and reinforcement of the prefabricated guardrail body 101;

[0055] The inclined tension unit includes an inclined nut 208 and an inclined reinforcing screw 209;

[0056] The inclined nut 208 is fixed to the inner side of the inclined surface of the vertical reinforcing screw 206. The inclined surface of the vertical reinforcing screw 206 is provided with a through hole that communicates with the inclined nut 208, and the through hole on the vertical reinforcing screw 206 is inclinedly aligned with the inclined reinforcing hole 105b.

[0057] An inclined reinforcing screw 209 passes through the top of the inclined reinforcing hole 105b and is threaded to the inclined nut 208 to provide a tension force inclined toward the bridge for the prefabricated guardrail body 101.

[0058] Multiple vertical reinforcing holes 105a and inclined reinforcing holes 105b are provided in the horizontal direction and are staggered with each other. The number and position of vertical nuts 205 and trapezoidal mating seats 207 are respectively matched with the number and position of vertical reinforcing holes 105a and inclined reinforcing holes 105b.

[0059] In this embodiment, the installation steps for this precast concrete crash barrier 1 are as follows:

[0060] The installation component 2, excluding the vertical reinforcing screw 206 and the inclined reinforcing screw 207, is pre-embedded and fixed at the designated position on the bridge. Its pre-embedded base plate 201 is located inside the concrete layer of the bridge, and the upper surface of the top plate 202 is flush with the upper surface of the concrete layer of the bridge.

[0061] When installing the prefabricated guardrail body 101, the prefabricated guardrail body 101 is hoisted to the top of the installation component 2 using hoisting equipment, so that the first docking straight groove 102 and the second docking straight groove 103 are aligned with the rectangular docking seat 204 and the trapezoidal docking seat 207 respectively, and the prefabricated guardrail body 101 is slowly lowered. Finally, the lower surface of the prefabricated guardrail body 101 is attached to the upper surface of the top plate 202, the first docking straight groove 102 is sleeved on the outside of the rectangular docking seat 204, and the second docking straight groove 103 is sleeved on the outside of the trapezoidal docking seat 207.

[0062] Then, the vertical reinforcing screw 206 is inserted from the top of the vertical reinforcing hole 105a and tightened with the vertical nut 205, thereby achieving vertical fixation and reinforcement of the prefabricated guardrail body 101;

[0063] Then, the inclined reinforcing screw 209 is inserted from the top of the inclined reinforcing hole 105b and tightened with the inclined nut 208, thereby providing an inclined downward tension to the prefabricated guardrail body 101, thus making the connection between the prefabricated guardrail body 101 and the bridge more stable.

[0064] After all the vertical reinforcing bolts 206 and inclined reinforcing bolts 209 are installed, grout can be injected into the first connecting straight groove 102 and the second connecting straight groove 103 through the vertical reinforcing hole 105a and the inclined reinforcing hole 105b. After the cement grout solidifies, the precast guardrail body 101 and the reinforcing component 2 form a whole, thus completing the installation and fixing of the precast concrete crash barrier 1.

[0065] Please refer to this carefully. Figures 1-8 Positioning grooves 104 are provided at both ends of the outer wall of the prefabricated guardrail body 101, where they are aligned with the first connecting straight groove 102 and the second connecting straight groove 103. The inner wall size of the positioning groove 104 is larger than the inner wall size of the first connecting straight groove 102 and the second connecting straight groove 103.

[0066] The outer wall dimensions of the rectangular docking seat 204 and the trapezoidal docking seat 207 are smaller than the inner wall dimensions of the first docking straight groove 102 and the second docking straight groove 103. Furthermore, the top and bottom sides of the rectangular docking seat 204 and the inclined surface and bottom sides of the trapezoidal docking seat 207 are provided with a number of slurry grooves 211.

[0067] The rectangular docking seat 204 and the trapezoidal docking seat 207 are fixed with positioning sealing plates 210 at both ends. The outer wall size of the positioning sealing plate 210 matches the inner wall size of the positioning groove 104.

[0068] Both the vertical reinforcement hole 105a and the inclined reinforcement hole 105b are composed of a receiving groove 1051, a through hole 1052, and a grouting hole 1053;

[0069] The storage groove 1051 is formed on the top of the prefabricated guardrail body 101, and the through hole 1052 is formed on the bottom of the storage groove 1051 and is respectively connected to the interior of the first docking straight groove 102 and the second docking straight groove 103. Multiple grouting holes 1053 are arranged in a ring around the center of the through hole 1052. The multiple grouting holes 1053 are connected to the through hole 1052 and the storage groove 1051, and their bottoms are respectively connected to the first docking straight groove 102 and the second docking straight groove 103.

[0070] In this embodiment: When the prefabricated guardrail body 101 is installed, the positioning of the prefabricated guardrail body 101 can be achieved by the docking of the positioning groove 104 and the positioning sealing plate 210. The vertical nut 205 and the vertical reinforcing hole 105a, and the inclined nut 208 and the inclined reinforcing hole 105b are automatically aligned, which facilitates the installation of the vertical reinforcing screw 206 and the inclined reinforcing screw 209.

[0071] Meanwhile, the positioning sealing plate 210 can seal both ends of the first and second docking straight grooves 102 and 102. When the vertical reinforcing screw 206 and the inclined reinforcing screw 209 are installed, they will not block the grouting hole 1053. Thus, during grouting, the cement slurry can flow into the interior of the first and second docking straight grooves 102 through the receiving groove 1051 and the grouting hole 1053. At the same time, the setting of the grout flow channel 211 allows the cement slurry to flow fully into all corners of the rectangular docking seat 204 and the trapezoidal docking seat 207. Finally, the cement slurry can completely cover the rectangular docking seat 204, the trapezoidal docking seat 207, the vertical nut 205, the inclined nut 208, the vertical reinforcing screw 206, the inclined reinforcing screw 209 and the top of the T-shaped connecting column 203, so that after the cement slurry solidifies, the connection between the prefabricated guardrail body 101 and the installation component 2 is stronger.

[0072] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A bridge concrete guardrail root reinforcement structure comprising a prefabricated concrete crash barrier (1), a mounting assembly (2), characterized in that, The prefabricated concrete crash barrier (1) is composed of a prefabricated barrier body (101), a first butt joint straight groove (102), a second butt joint straight groove (103), a vertical reinforcing hole (105a) and an inclined reinforcing hole (105b). The first butt joint straight groove (102) and the second butt joint straight groove (103) are formed at the bottom of the prefabricated barrier body (101), and the vertical reinforcing hole (105a) and the inclined reinforcing hole (105b) penetrate into the first butt joint straight groove (102) and the second butt joint straight groove (103) from the top of the prefabricated barrier body (101) respectively. The mounting assembly (2) is pre-buried on the bridge and is used for butt joint with the first butt joint straight groove (102) and the second butt joint straight groove (103) to realize positioning and installation of the prefabricated concrete crash barrier (1). The mounting assembly (2) comprises a pre-buried butt joint unit, a vertical reinforcing unit and an inclined tension unit. The vertical reinforcing unit and the inclined tension unit are installed at the top of the pre-buried fixing unit, and the pre-buried fixing unit is used for pre-buried fixing with the bridge so as to realize positioning and butt joint of the prefabricated concrete crash barrier (1). The vertical reinforcing unit is used for realizing vertical fixing and reinforcing of the prefabricated concrete crash barrier (1). The inclined tension unit is used for providing inclined tension to the prefabricated concrete crash barrier (1) towards the surface of the bridge.

2. The bridge concrete guardrail root reinforcing structure according to claim 1, characterized in that, The pre-buried butt joint unit comprises a pre-buried bottom plate (201), a top plate (202), a T-shaped connecting column (203), a rectangular butt joint seat (204) and a trapezoidal butt joint seat (207). The top plate (202) is distributed at the top of the pre-buried bottom plate (201), the T-shaped connecting column (203) penetrates through the top plate (202) from the top of the top plate (202) to below the top plate (202) and is fixedly connected with the top of the pre-buried bottom plate (201), the T-shaped connecting column (203) is fixedly connected with the top plate (202), the pre-buried bottom plate (201) is pre-buried and fixed on the bridge, and the upper surface of the top plate (202) is flush with the upper surface of the bridge. The rectangular butt joint seat (204) and the trapezoidal butt joint seat (207) are fixedly arranged on the upper surface of the top plate (202) in sequence, and the top of the T-shaped connecting column (203) is located inside the rectangular butt joint seat (204) and the trapezoidal butt joint seat (207) respectively. When the prefabricated barrier body (101) is placed on the upper surface of the top plate (202), the first butt joint straight groove (102) and the second butt joint straight groove (103) are respectively sleeved with the rectangular butt joint seat (204) and the trapezoidal butt joint seat (207) to realize preliminary positioning.

3. A bridge concrete guardrail root reinforcing structure according to claim 2, characterized in that, The vertical reinforcing unit comprises a vertical nut (205) and a vertical reinforcing screw (206). The vertical nut (205) is welded and fixed on the inner wall top of the rectangular butt joint seat (204), the top of the rectangular butt joint seat (204) is provided with a through hole penetrating through the vertical nut (205), and the vertical nut (205) is vertically aligned with the vertical reinforcing hole (105a). The vertical reinforcing screw rod (206) is fixed by being screwed into the vertical reinforcing hole (105a) from the top of the vertical reinforcing hole (105a) and being connected with the vertical nut (205), so as to realize vertical fixing and reinforcing of the prefabricated guardrail body (101).

4. The bridge concrete guardrail root reinforcing structure according to claim 3, characterized by, The inclined tension unit comprises an inclined nut (208) and an inclined reinforcing screw rod (209); The inclined nut (208) is fixed to the inner side of the inclined surface of the vertical reinforcing screw rod (206), the inclined surface of the vertical reinforcing screw rod (206) is provided with a through hole in communication with the inclined nut (208), and the through hole on the vertical reinforcing screw rod (206) is inclinedly aligned with the inclined reinforcing hole (105b); The inclined reinforcing screw rod (209) is screwed into the inclined nut (208) by penetrating the inclined reinforcing hole (105b) from the top of the inclined reinforcing hole (105b), so as to provide a tension force inclined to the bridge for the prefabricated guardrail body (101).

5. The bridge concrete guardrail footing reinforcement structure according to claim 4, wherein, The vertical reinforcing hole (105a) and the inclined reinforcing hole (105b) are provided with a plurality of holes in the horizontal direction, and the vertical reinforcing hole (105a) and the inclined reinforcing hole (105b) are distributed in a staggered manner, and the number and position of the vertical nut (205) and the trapezoidal abutting seat (207) are matched with the number and position of the vertical reinforcing hole (105a) and the inclined reinforcing hole (105b).

6. The bridge concrete guardrail base reinforcement structure according to claim 2, wherein The outer wall of the prefabricated guardrail body (101) is provided with a positioning groove (104) at the position aligned with the first abutting straight groove (102) and the second abutting straight groove (103), and the inner wall size of the positioning groove (104) is greater than the inner wall size of the first abutting straight groove (102) and the second abutting straight groove (103). The outer wall size of the rectangular abutting seat (204) and the trapezoidal abutting seat (207) is smaller than the inner wall size of the first abutting straight groove (102) and the second abutting straight groove (103), and a plurality of pulp grooves (211) are formed in the top and both sides of the rectangular abutting seat (204) and the inclined surface and both sides of the trapezoidal abutting seat (207). The rectangular abutting seat (204) and the trapezoidal abutting seat (207) are fixed with a positioning blocking plate (210) at both ends, and the outer wall size of the positioning blocking plate (210) is matched with the inner wall size of the positioning groove (104).

7. The bridge concrete guardrail base reinforcement structure of claim 1, wherein The vertical reinforcing hole (105a) and the inclined reinforcing hole (105b) are composed of a receiving groove (1051), a through hole (1052) and a grouting hole (1053). The receiving groove (1051) is formed at the top of the prefabricated guardrail body (101), the through hole (1052) is formed at the bottom of the receiving groove (1051) and is in communication with the inside of the first abutting straight groove (102) and the second abutting straight groove (103), and a plurality of grouting holes (1053) are arranged in a circular manner with the center of the through hole (1052) as the center, the plurality of grouting holes (1053) are in communication with the through hole (1052) and the receiving groove (1051), and the bottoms are in communication with the first abutting straight groove (102) and the second abutting straight groove (103).

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