CN219137408U - Urban overhead square upright post unsupported anchor ear structure and anchor ear body friction surface structure thereof - Google Patents

Abstract

The utility model discloses an urban overhead square upright post unsupported anchor ear structure and an anchor ear body friction surface structure thereof. The friction surface structure of the anchor ear body comprises a friction surface anchor ear body and a supporting steel bracket; the inner side surface of the friction surface hoop body is contacted with one side surface of the square upright post, and the support steel corbel is arranged on the outer side surface of the friction surface hoop body; the supporting steel corbel is provided with a steel strand layout position for arranging the steel strands; the shape of the arrangement position of the steel strand is matched with the line type of the steel strand; the inner side surfaces of the friction surface hoops are respectively provided with connecting parts at positions close to the two ends. Therefore, the friction surface structure of the anchor ear body can form friction load with the surface of the square upright post to resist the action of vertical external load through pre-compression on one hand, and can be connected with the bolt surface structure on the other hand to form the anchor ear structure.

Description

Urban overhead square upright post unsupported anchor ear structure and anchor ear body friction surface structure thereof

Technical Field

The utility model relates to an urban overhead square upright post unsupported anchor ear structure and an anchor ear body friction surface structure thereof, belonging to the field of temporary support structure design and engineering construction of civil engineering bridges.

Background

With the increasing promotion of urban mass production in China, urban population scale is steadily increased, and urban expressways become an important means for solving urban traffic jams. The common urban expressway in China adopts a ground road and a main line overhead, namely a bearing platform of the main line overhead is positioned in a central separation zone of the ground road, and a cantilever type bent cap is adopted as an overhead supporting structure to realize double-layer traffic of the road.

The existing construction method mainly comprises a full framing construction process, a few-support floor steel pipe construction process and a column penetrating steel bar unsupported construction process.

As a cast-in-place concrete structure, the traditional bowl-buckle type full framing construction process is subject to more and more constraints and challenges:

1) When the full framing system is constructed, the whole projection range of the bent cap does not allow vehicles to pass: (1) for the existing road reconstruction engineering, the technology increases the difficulty of temporary conservation (the more intense the surrounding land resources are, the greater the limited degree is); (2) for new construction, the technology requires additional construction and construction of temporary channels, the area is often the arrangement range of the rain sewage pipeline, and the area is required to be abandoned in the later period, so that the construction cost is increased, the stone and machinery investment is large, and the technology does not meet the energy-saving, environment-friendly and green construction requirements;

2) For soft soil areas, the depth of foundation treatment is often 1.5-2.0 times of the height of a newly built road cushion layer, a20 cm concrete cushion layer needs to be poured on the surface layer, the cushion layer is completely chiseled after construction is finished, temporary consumption of concrete and extra investment of stone are increased, and a large amount of precious social resources are consumed at the same time of increasing construction cost;

3) The whole stability of the full framing system is subject to the periphery, when heavy vehicles frequently pass around the framing system, the newly poured bent cap is extremely easy to be disturbed to generate cracks, and a large hidden trouble is formed for later overhead operation.

When the construction process of the floor steel pipe is used for high pier construction, the input quantity of the steel pipes can be increased along with the increase of the height of the upright post, and the stability of the high steel pipe structure and the construction risk of mounting and dismounting exist. The urban overhead construction has higher requirements on appearance quality, so the unsupported construction process of the column penetrating steel bar cannot meet the requirements of the urban overhead construction. In summary, in order to solve the problems of large resource consumption, high construction cost, hidden danger of a main structure and the like in the traditional bowl-buckle type full framing process, a novel capping beam bracket system is developed.

Disclosure of Invention

The utility model provides a hoop body friction surface structure suitable for an urban overhead square upright post unsupported hoop structure, aiming at the defects of the prior art. The urban overhead square upright post unsupported anchor ear structure solves the problem of the design of the temporary supporting structure of the urban overhead bent cap or the upper structure support-free construction method, analyzes according to the structural characteristics of the square upright post and the stress distribution condition of the square structure, determines the long side of the square upright post as a main friction surface (in contact with the anchor ear body friction surface structure), and the short side as a bolt fastening surface, and meanwhile, the precompression system adopts a steel strand and high-strength bolt combined structure. The anchor ear structure formed by the anchor ear body friction surface structure matched with the bolt surface structure and the pre-compression system improves the stability of the square upright post and reduces the risk of installing and detaching the square upright post. In addition, the friction surface structure of the hoop body can form friction load with the surface of the square upright post to resist the action of vertical external load through pre-pressure on one hand, and can be connected with the bolt surface structure on the other hand to form the hoop structure.

In order to achieve the technical purpose, the utility model adopts the following technical scheme:

the friction surface structure of the anchor ear body comprises a friction surface anchor ear body and a supporting steel bracket; the inner side surface of the friction surface hoop body is contacted with one side surface of the square upright post, and the support steel corbel is arranged on the outer side surface of the friction surface hoop body; the supporting steel corbel is provided with a steel strand layout position for arranging the steel strands; the shape of the arrangement position of the steel strand is matched with the line type of the steel strand; the inner side surfaces of the friction surface hoops are respectively provided with connecting parts at positions close to the two ends.

Preferably, the supporting steel corbel comprises three vertical steel plates and three horizontal hoop stiffening plates; the three vertical steel plates are equidistantly arranged in the middle of the friction surface hoop body, and the inner side surfaces of each vertical steel plate and each hoop stiffening plate are welded and fixed with the outer wall of the friction surface hoop body; the number of the steel strands is three, and the steel strands are arranged along the outer edge profiles of the three hoop stiffening plates in a one-to-one correspondence manner.

Preferably, the supporting steel corbel further comprises a hoop outer panel and a steel strand limiting groove; the section shape of the outer panel of the hoop body is matched with the outer edge molded surface of the stiffening plate of the hoop body, and the outer side of the friction surface hoop body is covered with the outer side of the friction surface hoop body; the three vertical steel plates and the three horizontal hoop stiffening plates are positioned in a space formed by the encircling of the outer panel of the hoop body and the friction surface hoop body; the outer surface of the outer panel of the hoop body is uniformly provided with a steel strand limiting groove at the position corresponding to each stiffening plate of the hoop body; the steel strands are correspondingly distributed along the steel strand limiting grooves one by one; the steel strand limiting groove is the steel strand laying position.

Preferably, the friction surface hoop body be rectangular box structure, including inboard panel, outside panel, curb plate and connecting plate, wherein: the inner side panel and the outer side panel are arranged in parallel, two ends of the inner side panel and the outer side panel are respectively spliced through a side plate, and meanwhile, the inner side panel and the outer side panel are connected through a plurality of connecting plates distributed at equal intervals.

Preferably, the connecting plate is double-spliced 10# channel steel.

The utility model further aims to provide an urban overhead square upright post unsupported anchor ear structure which comprises the anchor ear body friction surface structure.

Based on the technical objects, compared with the prior art, the utility model has the following advantages:

according to the anchor ear friction surface structure, the connecting part is arranged to be connected with the bolt surface structure to form the anchor ear structure enclosed on the outer side of the square upright post, on the other hand, the steel strand arrangement position is arranged to apply prestress to the anchor ear friction surface structure by installing the steel strand, and the rubber gasket is arranged between the inner side surface of the anchor ear friction surface structure and the square upright post to form the friction load to resist the vertical external load.

Drawings

FIG. 1 is a schematic structural view of a square upright unsupported anchor ear structure incorporating the anchor ear body friction face structure of the utility model;

FIG. 2 is a first structural schematic illustration of the bolt face configuration of FIG. 1;

FIG. 3 is a schematic view of a first construction of a friction surface of a hoop body according to the present utility model;

FIG. 4 is a schematic diagram of the configuration of the precompression system of FIG. 1;

FIG. 5 is a second structural schematic view of the bolt face construction of FIG. 1;

FIG. 6 is a second structural schematic illustration of the friction face configuration of the anchor ear according to the present utility model;

in the figure: 1-square upright posts; 2-a friction surface structure of the hoop body; 3-bolt face construction; 4-a precompression system;

201-connecting bolt hole A; 202-connecting plates; 203-a first panel; 204-a second panel; 205-side plates; 206-vertical steel plates; 207-hoop stiffener; 208-a steel strand limiting groove; 209-collar outer panel;

301-connecting plate A; 302-column contacts; 303-steel strand anchoring holes; 304-high-strength bolt holes; 305-a butt-penetrating connecting bolt hole site between the prestress application body and the upright post contact body;

401-steel strand; 402-self-making an anchor head; 403-P anchor.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the utility model, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model. The relative arrangement, expressions and numerical values of the components and steps set forth in these embodiments do not limit the scope of the present utility model unless it is specifically stated otherwise. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values.

The temporary supporting body of the urban overhead square upright post unsupported anchor ear structure disclosed by the utility model is shown in figures 1 to 6, and the surrounding hoop is arranged at the outer side of the square upright post 1 and comprises three parts, wherein the parts correspond to: hoop body friction face construction 2, bolt face construction 3 and precompression system 4, wherein:

1.1 Design of friction surface structure 2 of hoop body

The hoop body friction surface structure 2 comprises two parts, namely a friction surface hoop body and a supporting steel corbel, wherein:

(1) Friction face hoop design

The long side of the square upright post 1 is used as a main stressed friction surface to be designed, the friction surface hoop body mainly bears two functions, namely, the friction load is formed on the surface of the upright post through precompression to resist the vertical external load, and the hoop structure is connected with a bolt surface structure.

In the design of the friction surface hoop body, the friction surface hoop body (see the accompanying drawings 1, 2 and 5) is designed as follows in consideration of the fact that the hoop body friction surface structure 2 needs to be connected with the bolt surface structure 3 through bolts, so as to reserve a bolt working space:

1) The inner side plate surface of the first panel 203 (inner side plate) is directly contacted with the surface of the upright post, and the length of the first panel 203 is longer than the length of the long side of the upright post, so that the corner of the upright post can be effectively avoided;

2) A second panel 204, wherein a gap between the second panel 204 and the first panel 203 is supported by a connecting plate 202 (double-spliced 10# channel steel), and a side surface is sealed by a side plate 205 (side steel plate);

3) The friction surface hoop body is supported by adopting double-spliced 10# channel steel (connecting plate) between the first panel 203 and the second panel 204, and a gap of 10cm between the first panel 203 and the second panel 204 can meet the bolt construction requirement of the friction surface hoop body and the bolt surface structure 3;

4) The friction surface hoop body is connected with the bolt surface structure 3 through 8.8-level M24 bolts, the connection bolt holes A201 comprise a plurality of connection bolt holes A201, the hole sites of the connection bolt holes A201 are distributed on two sides of the first-section double-spliced 10# channel steel, the vertical distance between the bolts meets the design specification of bolt hole site arrangement, the height of the hoop body is controlled, and the problem that the middle bolts cannot be constructed due to depth is avoided.

The design and construction of the friction surface hoop body is shown in figures 1, 3 and 6.

(2) Stiffening structure design for supporting steel corbel and hoop body

The external load mainly born by the urban overhead square upright post unsupported anchor ear structure directly acts on the supporting steel corbel, and meanwhile, the structural form of the whole friction surface hoop body is considered, and as shown in fig. 1, 3 and 6, the combined form of three vertical steel plates 206 and horizontal stiffening steel plates is adopted as the supporting steel corbel structure. Namely, the supporting steel corbel comprises three vertical steel plates 206 and hoop stiffening plates 207, wherein the three vertical steel plates 206 are equidistantly arranged in the middle of the friction surface hoop; the number of the hoop stiffening plates 207 is also three, and each hoop stiffening plate 207 is horizontally distributed and vertically equidistantly distributed along the friction surface hoop; and the inner side surfaces of each vertical steel plate 206 and each hoop stiffening plate 207 are welded and fixed with the outer wall of the friction surface hoop.

In order to enhance structural stability, the unsupported anchor ear structure of the utility model is provided with an outer hoop panel 209, and referring to fig. 3, at this time, the hoop stiffening plate 207 is respectively connected with the friction surface hoop body and the outer hoop panel 209, so that the vertical steel plate 206 supporting the steel bracket structure, the friction surface hoop body and the outer hoop panel 209 form a whole, and overall stability is enhanced. Meanwhile, the arrangement position of the steel strands 401 is considered, and the stiffening steel plate is designed to be positioned at the same position as the steel strands 401.

(3) Other constructional designs

In the design of the friction surface structure 2 of the hoop body, an outer panel 209 of the hoop body and a steel strand limiting groove 208 are also arranged, as shown in fig. 3 and 6, the steel strand limiting groove 208 is processed by using a 2cm thick steel plate, and the width and depth of the steel strand limiting groove 208 are 20mm and 20mm, so that the steel strand limiting groove is mainly used for limiting the vertical deflection of a steel strand 401 (phi 15.2 mm) in the construction process, and the pre-compression applying effect of the hoop structure is ensured. The outer panel has the same shape as the steel strand 401 and has a parabolic shape.

Note that: the contact position of the steel strand limiting groove 208 and the side steel plate of the friction surface hoop body needs to be additionally polished, so that the connection at the corner is round and smooth, and the abrasion of the steel strand 401 during fastening is avoided.

Note that: the specific parameters and materials of the friction surface structure 2 of the anchor ear body are selected and determined according to the external load capacity and the size of the square upright post 1, and particularly the number of bolts and the number of steel strands 401 are set to safety values according to the technical level of the construction unit.

1.2 Design of bolt face structure 3

The bolt face is different from the friction face, does not participate in the friction load improvement of the anchor ear structure, is only used as a high-strength bolt and steel strand pre-compression application auxiliary structure, and forms a complete surrounding structure which is positioned on the periphery of the square upright post 1 with the friction face anchor ear structure. The bolt face structure 3 is mainly divided into two parts, namely a column contact body 302 which is contacted with a column (a gap can exist) on one hand and connected with the anchor ear body friction face structure 2 through a bolt on the other hand; and secondly, the prestress application body is connected with the upright post contact body 302 by bolts (divided into a movable side and a fixed side), and the prestress application body is provided with steel strand hole sites and high-strength bolt holes 304.

(1) Column contact 302 design

The structural form of the upright post contact body 302 is the same as that of the friction surface hoop body, a double-panel and double-spliced 10# channel steel combined structure is adopted, meanwhile, a connecting plate (connecting plate A301) used for being connected with the friction surface structure 2 of the hoop body is arranged at the tail part, the design of bolt hole sites on the upright post contact body 302 is basically the same as that of the friction surface hoop body and the square upright post 1, and the space of the double-spliced 10# channel steel can meet the construction requirement of bolts.

(2) Prestress-imparting body design

The prestress applying body is formed by welding and combining two steel plates (one of the steel plates is a bearing plate, and the other steel plate is a connecting plate B), the bearing plate is processed by adopting a 60-80 mm thick steel plate (required by steel strand fastening measures), the connecting plate B connected with the upright post contact body 302 is processed by adopting a20 mm thick steel plate, and the bearing plate and the connecting steel plate B are welded into a whole during welding. The inner side of the bearing plate is provided with a row of steel strand anchoring holes 303 which are vertically distributed, and the outer side of the bearing plate is provided with a row of high-strength bolt holes 304 which are vertically distributed.

Note that: the inner wall of the steel strand anchoring hole 303 is provided with threads.

(3) Design of movable side and fixed side

Two bolt face structures 3 on the same side of the square upright 1, one side of which is movable and the other side of which is fixed.

In the bolt face structure 3 on the movable side, when the high-strength bolt is pre-pressed, horizontal sliding (pre-stress applying body sliding) can be performed to the central line position of the upright post, so that the requirement of elongation of the steel strand 401 is met.

In designing the bolt face structure 3 on the movable side, the butt joint bolt hole site 305 between the prestressing body and the column contact body 302 is formed in a long bar shape, and a slight horizontal movement is possible when the prestressing force is applied to the high-strength bolt. The design of the movable-side bolt face construction 3 is shown in fig. 2.

The design structure of the fixed-side bolt face structure 3 is shown in fig. 5, and the hole site of the through connection bolt between the prestress applying body and the column contact body 302 is configured as a circular hole.

Note that: when the high-strength bolt applies pre-compression, the bolt on one side is a movable side and the bolt on the other side is a fixed side.

1.3 Precompression system 4 design

The pre-compression system 4 of the temporary supporting system of the urban overhead square upright post unsupported anchor ear structure adopts a combined form of a steel strand 401 and a high-strength bolt, as shown in fig. 4, the preliminary pre-compression is applied through the high-strength bolt, the pre-compression is transferred to the steel strand 401 through the horizontal displacement of the movable side bearing plate in the tightening process of the high-strength bolt, and the tensile force of the steel strand 401 is transferred to the anchor ear body and the vertical friction force formed by the friction surface.

The overall dimension of the hoop body structure is determined according to the linearity of the steel stranded wires 401, the component force in the direction of the linear upright column of the annular steel stranded wires 401 provides pressure, the linear steel stranded wires 401 are arranged according to the parabolic shape, the parabolic rise determines the component force in the direction of the upright column, meanwhile, the rise is not too large, otherwise, the outside movement of an external load acting point is easily caused due to the too large width of a steel bracket, and the additional bending moment is increased, so that the bearing capacity of the hoop structure is influenced.

Steel strand anchoring structure description

The connection measure between the steel strand 401 and the bearing plate adopts a self-made steel strand anchor head 402, as shown in fig. 4, the steel strand 401 adopts a P anchor 403, and the self-made anchor head 402 is of a cylinder structure with one end closed (leaving a 16mm steel strand hole site). After the P anchor 403 is installed, the self-made anchor head 402 is sleeved, threads (corresponding to the bearing plate bolts) are arranged on the outer wall of the self-made anchor head 402, and the self-made anchor head 402 is screwed into the bearing plate steel strand hole site to provide initial tension.

Note 1: the hollow end of the self-made anchor head 402 faces outwards, the closed end faces inwards, and the P anchor 403 is arranged in the self-made anchor head 402 from the hollow end; the hollow end of the self-made anchor head 402 faces the bearing plate hole site, the self-made anchor head 402 is made to advance by rotating the closed end, and the steel strand 401 is tensioned.

And (2) injection: the number of steel strands 401 and the number of high-strength bolts are determined according to the external load.

Based on the temporary supporting system of the urban overhead square upright post unsupported anchor ear structure, the utility model discloses an embodiment, wherein during construction, the following aspects of processing quality of the anchor ear structure, installation quality of the temporary supporting system and verification work of the temporary supporting system are strictly controlled, and the important point is control of the installation quality of the temporary supporting system.

2.1 Hoop structure processing quality control

The processing quality of the temporary support system should control the following points:

(1) Machining quality of contact panel in hoop body friction surface structure 2

In the hoop body friction surface structure 2, the first panel 203 is directly connected with the upright column friction surface, so that the inner side surface of the first panel 203 and the upright column friction surface must be ensured to be in the same plane in the processing process and kept vertical, otherwise, when the hoop structure applies pre-compression, the first panel 203 and the square upright column 1 are in a local contact state, and the friction effect is affected.

(2) Bearing plate processing quality

The bearing plate directly bears huge initial pre-compression load (applied by the high-strength bolts and the steel strands 401), and the risk of deformation of the bearing plate exists during construction, so that the processing quality needs to be paid extra attention to during the processing and welding of the bearing plate. In the prestress application body, the bearing plate and the connecting plate B are welded on the connecting plate B (the connecting plate B is a bottom plate), the inner lining of the connecting part is a groove welding seam, the outer side is a fillet welding seam, the welding seam length and the welding leg size meet the external load and standard requirements, and meanwhile, 100% ultrasonic detection is needed after the welding is completed.

(3) Self-made anchor head 402 machining quality

The self-made anchor head 402 is prohibited from being welded in sections, so that the strength of the self-made anchor head 402 is ensured by integral die-casting of the machine, and meanwhile, the outer wall threads of the self-made anchor head 402 meet the prestress tensioning strength requirement, so that sliding wires are avoided during precompression transmission, and precompression is invalid.

(4) Other points of attention

1) The processing quality of the internal thread of the steel strand anchoring hole 303 of the bearing plate is the same as that of the external thread of the self-made anchor head 402;

2) The contact chamfer position between the outer panel 209 (outer panel) of the hoop body and the side plate 205 should be polished to avoid damaging the steel strand 401.

2.2 Hoop structure installation quality control

The mounting quality of the hoop structure is controlled by the following points:

(1) Mounting step control

The hoop structure is installed as follows:

1) Bolt face structure 3 assembly

Assembling the column contact body 302 in the bolt face structure 3 with the prestress applying body, wherein the movable end bolt is required to keep the maximum movable distance;

2) Bolt face structure 3 and friction face anchor ear body assembly

The assembled bolt face structure 3 is connected with the friction face hoop body through bolts, and the bolt face structure 3 is required to be ensured to be perpendicular to the friction face hoop body during assembly;

3) Preinstalled steel strand

The two ends of the steel strand 401 are respectively provided with a P anchor 403 and a self-made anchor head 402, and meanwhile, the assembled steel strand 401 is screwed into a bearing plate (1 wire is screwed in) to serve as temporary fixing effect, and meanwhile, the steel strand 401 is protected by being padded to a thin rubber sheet at a corner;

4) Assembling the anchor ear structures of the friction surfaces at two sides, and performing temporary positioning, wherein a rubber sheet is arranged on the friction surfaces during assembling so as to increase the friction coefficient;

5) The steel strand self-made anchor head 402 is gradually screwed into the bearing plate, so that the steel strand 401 is in an initial tensioning state;

6) And (5) screwing the high-strength bolt to achieve standard torque standard of the high-strength bolt, and transmitting the precompression.

(2) High strength bolt construction requirement

The most core technology in the structural design and construction of the friction surface hoop body is the pre-pressure provided by the high-strength bolt, so that the construction quality of the high-strength bolt directly influences the bearing capacity of the temporary supporting structure based on the hoop. In the construction process of the high-strength bolt, the operation is strictly carried out according to the relevant regulations of the technical regulations of high-strength bolt connection, an appropriate electric wrench is selected for construction, the final screwing torque of the high-strength bolt is detected after the construction is finished, and the upper structure can be installed after the standard requirement is met.

(3) Friction coefficient determination

A rubber cushion layer of 5mm is arranged between the friction surface hoop body structure and the friction surface of the square upright column 1, and the purpose of arranging the rubber cushion layer is two:

the friction coefficient between the square upright post 1 and the friction surface hoop body structure is increased, the friction coefficient of rubber cushion layers with different materials and different thicknesses is determined according to a test, and then a proper rubber product is selected according to the actual situation on site;

the damage of concrete on the surface of the square upright post 1 caused by the high-strength bolt in the actual pre-stressing process is prevented, and the aim of damaging the temporary supporting structure is fulfilled.

Claims (6)

1. The friction surface structure of the anchor ear body is characterized by comprising the friction surface anchor ear body and a supporting steel bracket; the inner side surface of the friction surface hoop body is contacted with one side surface of the square upright post, and the support steel corbel is arranged on the outer side surface of the friction surface hoop body; the supporting steel corbel is provided with a steel strand layout position for arranging the steel strands; the shape of the arrangement position of the steel strand is matched with the line type of the steel strand; the inner side surfaces of the friction surface hoops are respectively provided with connecting parts at positions close to the two ends.

2. The hoop body friction face construction of claim 1 wherein the supporting steel corbels comprise three vertical steel plates and three horizontal hoop body stiffening plates;

the three vertical steel plates are equidistantly arranged in the middle of the friction surface hoop body, and the inner side surfaces of each vertical steel plate and each hoop stiffening plate are welded and fixed with the outer wall of the friction surface hoop body;

the number of the steel strands is three, and the steel strands are arranged along the outer edge profiles of the three hoop stiffening plates in a one-to-one correspondence manner.

3. The friction surface configuration of a hoop body of claim 2, wherein the supporting steel corbel further comprises a hoop outer panel and a steel strand limiting groove;

the section shape of the outer panel of the hoop body is matched with the outer edge molded surface of the stiffening plate of the hoop body, and the outer side of the friction surface hoop body is covered with the outer side of the friction surface hoop body;

the three vertical steel plates and the three horizontal hoop stiffening plates are positioned in a space formed by the encircling of the outer panel of the hoop body and the friction surface hoop body;

the outer surface of the outer panel of the hoop body is uniformly provided with a steel strand limiting groove at the position corresponding to each stiffening plate of the hoop body;

the steel strands are correspondingly distributed along the steel strand limiting grooves one by one;

the steel strand limiting groove is the steel strand laying position.

4. The friction surface structure of claim 3, wherein the friction surface hoop is a rectangular box structure comprising an inner side panel, an outer side panel, side plates and a connecting plate, wherein:

the inner side panel and the outer side panel are arranged in parallel, two ends of the inner side panel and the outer side panel are respectively spliced through a side plate, and meanwhile, the inner side panel and the outer side panel are connected through a plurality of connecting plates distributed at equal intervals.

5. The friction surface structure of the hoop body according to claim 4, wherein the connecting plate is a double-spliced 10# channel steel.

6. An urban overhead square upright unsupported anchor ear structure comprising an anchor ear body friction surface structure as claimed in any one of claims 1 to 4.

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