Expanded-head anti-floating anchor rod based on PSB finish rolling deformed steel bar

Abstract

The utility model belongs to the technical field of anti-floating anchor rods, discloses an expanded-head anti-floating anchor rod based on PSB finish rolling deformed steel bars, and aims at solving the problems that an existing expansion type anti-floating anchor rod is complex in structure, and the construction efficiency is affected in the expansion process. A plurality of bearing structures are arranged on the PSB finish rolling deformed steel bar in the expanded head section of the anchor hole at intervals, each bearing structure comprises a bottom plate used for being connected to the PSB finish rolling deformed steel bar, and a plurality of bearing plates are rotationally connected to the bottom plate. The bearing plate can rotate to an inclined state or a horizontal state from a vertical upward state on the bottom plate; the distance between the gravity center of the bearing plate and the axis of the PSB finish rolling deformed steel bar is A, the distance between the rotating center line of the bearing plate and the bottom plate and the axis of the PSB finish rolling deformed steel bar is B, and A is larger than B. The anchor rod has the advantages of being simple in structure and convenient to operate, and therefore the purposes of reducing the manufacturing cost of the anchor rod and improving the construction efficiency of the anchor rod are achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of anti-floating anchor rods, and in particular relates to an anti-floating anchor rod with an enlarged head based on PSB fine-rolled threaded steel. Background Art

[0002] Anchor rods are one of the important means to control the deformation of foundation pits in foundation pit support projects. Because their support method is conducive to earth excavation and underground structure construction, greatly shortens the construction period and reduces the project cost, they are widely used in deep foundation pit support projects. In recent years, the newly emerged enlarged head anchor rods in this field have their own unique advantages and have attracted a lot of research from relevant scholars. From the perspective of mechanical mechanism, the pull-out resistance of traditional anchor rods mainly comes from the lateral resistance between the anchor body and the soil, which belongs to the friction type anchor rod, while the pull-out resistance of the enlarged head anchor rod mainly includes two parts: the lateral resistance between the side wall of the anchor body of the ordinary anchor section + the side wall of the enlarged head and the soil, and the end resistance of the soil to the end of the enlarged head, which belongs to the friction-end bearing type anchor rod.

[0003] At present, enlarged head anchor rods include ordinary steel bar anchor rods and anchor rods based on PSB fine-rolled threaded steel. In order to improve the anti-floating ability of the anti-floating anchor rod based on PSB fine-rolled threaded steel, a bearing plate is provided at the lower end of the PSB fine-rolled threaded steel. By setting up multiple bearing plates, the contact area between the PSB fine-rolled threaded steel bar and the poured concrete is increased, thereby improving the friction resistance of the PSB fine-rolled threaded steel bar.

[0004] However, during use, the bearing plate of the PSB fine-rolled threaded steel bar anchor is limited by the diameter of the anchor hole (non-enlarged head section). The outer diameter of the bearing plate is smaller than the diameter of the non-enlarged head section anchor hole, and the size of the bearing plate affects the anti-floating ability of the entire anti-floating anchor.

[0005] In order to increase the contact area between the anti-floating anchor bearing plate and the concrete to achieve the purpose of improving the anti-floating ability, the prior art has an anti-floating anchor with an expansion function. For example, application No. 2022234724764 discloses an enlarged head reinforced anti-floating anchor, including a driving assembly, on which a leg is provided, the driving assembly can drive the leg to expand or retract, and the leg can be inserted into the rotary spray body; the driving assembly includes a sleeve, on which a push rod is slidably connected, the leg includes a support rod and a connecting rod, one end of the connecting rod is hinged to the support rod, and the end of the support rod close to the push rod is hinged to the push rod, and the other end of the connecting rod is rotatably connected to the sleeve.

[0006] Another example is a prestressed enlarged head anti-floating anchor and construction method with application number 2022101717603, wherein a variable diameter steel cage is installed on the anchoring section of the anchor rod body, an anti-corrosion ring is sleeved on the outside of the free section of the anchor rod body, the anchor centralizer is arranged on the free section of the anchor rod body, and a second steel sleeve is sleeved on the upper part of the anchor rod body, the bottom of the second steel sleeve is connected to the top of the anti-corrosion ring, the top is aligned parallel to the bottom surface of the anchor pit and connected to the stress diffusion anchor plate, and the stress diffusion anchor plate is fixed by a fastening nut; the anchor anti-seepage layer is arranged between the building foundation bottom plate and the foundation waterproof layer, and the grouting pipe is arranged on one side of the anchor rod body; the variable diameter steel cage can increase the contact area between the anchor rod body and the anchor body when it is unfolded.

[0007] For another example, application number 201510280826.2 discloses an installation and construction method of an end-enlarged anti-floating anchor rod, comprising the following steps: 1) drilling a hole; 2) inserting the anti-floating anchor rod; the anti-floating anchor rod comprises an anchor rod and an anchor head, the anchor head is provided with an end-enlarged structure, the end-enlarged structure comprises a base plate fixedly connected to the bottom end of the anchor rod and a connecting plate evenly distributed in a ring shape and welded and fixed to the base plate and the anchor rod at the same time, a connecting hole is opened on the connecting plate, an enlarged skeleton with one end hingedly connected to the connecting hole is provided on the connecting hole, a through hole is provided on the other end of the enlarged skeleton, a retractable connecting wire is provided in the through holes of all the enlarged skeletons, and the two ends of the connecting wire are connected as a whole.

[0008] As in the above-mentioned examples of the existing anti-floating anchor rod with expansion function, on the one hand, the expansion structure is complex, resulting in high manufacturing costs, and on the other hand, it needs to be expanded separately during expansion, which affects the construction efficiency of the anti-floating anchor rod. Utility Model Content

[0009] In order to solve the problems of complex structure and influence of construction efficiency on the unfolding process of the existing unfolding anti-floating anchor rods, the utility model provides an enlarged head anti-floating anchor rod based on PSB fine-rolled threaded steel bar, which has the characteristics of simple structure and convenient operation while increasing the contact area between the bearing plate and the poured concrete, thereby achieving the purpose of reducing the anchor rod manufacturing cost and improving the anchor rod construction efficiency.

[0010] In order to solve the technical problem, the technical solution adopted by the utility model is:

[0011] An enlarged head anti-floating anchor rod based on PSB fine-rolled threaded steel, comprising a PSB fine-rolled threaded steel for implantation in an anchor hole, a plurality of bearing structures being arranged at intervals on the PSB fine-rolled threaded steel located in the enlarged head section of the anchor hole, characterized in that the bearing structure comprises a base plate for connection to the PSB fine-rolled threaded steel, a plurality of bearing plates being rotatably connected to the base plate, the bearing plates being able to rotate on the base plate from an upright upward state to an inclined state or a horizontal state; the distance between the center of gravity of the bearing plate and the axis of the PSB fine-rolled threaded steel is A, the distance between the rotation center line of the bearing plate and the base plate and the axis of the PSB fine-rolled threaded steel is B, wherein A is greater than B.

[0012] In some embodiments, at least two pin seats are evenly arranged on the bottom plate, and the bearing plate is rotatably connected to the pin seats via the pin shafts.

[0013] In some embodiments, four "L"-shaped mounting plates are arranged at the four corners of the base plate, and two mutually perpendicular pin holes are formed on the mounting plates. Pins for rotationally connecting the supporting plates are sleeved in the pin holes.

[0014] In some embodiments, the supporting plate has a groove opened along the length direction of the supporting plate.

[0015] In some embodiments, the groove is formed on a side of the bearing plate for receiving poured concrete.

[0016] In some embodiments, the bottom plate has a supporting surface for supporting against an end surface of the supporting plate when the supporting plate rotates to the lowest position.

[0017] In some embodiments, an even number of supporting plates are arranged on the base plate, through holes are opened on the base plate corresponding to the positions of the supporting plates, sliding rods are installed in the through holes, and slots that are compatible with the sliding rods are opened on the supporting plates. After the supporting plates are unfolded on the base plate, they are supported by the sliding rods.

[0018] In some embodiments, the through hole is a stepped hole, the sliding rod has a large diameter end and a small diameter end, and the small diameter end of the sliding rod passes through the through hole and is inserted into the slot of the carrier plate.

[0019] In some embodiments, the positions of the bearing plates on the upper and lower adjacent bearing structures on the PSB fine-rolled threaded steel bars are staggered with each other.

[0020] Compared with the prior art, the utility model has the following beneficial effects:

[0021] During the construction process of the enlarged head anti-floating anchor rod based on PSB fine-rolled threaded steel of the utility model, when the PSB fine-rolled threaded steel enters the non-enlarged head section of the anchor hole, the hole wall of the anchor hole gives a certain limiting effect to the bearing plate of the bearing structure and does not rotate. The bearing plate is in an upright state and smoothly passes through the non-enlarged head section of the anchor hole; when the top of the bearing plate of the bearing structure enters the enlarged head section of the anchor hole, the bearing plate loses the limiting effect of the hole wall of the anchor hole, and the bearing plate rotates along the bottom plate under the action of its own weight to achieve expansion. When the bearing plate hits one end of the sliding rod on the bottom plate, the sliding rod is squeezed, so that the sliding rod extends outward from another direction and extends into the card slot of the bearing plate corresponding to the sliding rod, thereby supporting the bearing plate. Compared with the existing expandable anti-floating anchor rod, the utility model has the advantages of simple structure and ingenious design, and does not require a separate expansion operation during the construction process. Therefore, the structure of the utility model has the advantages of low manufacturing cost and convenient construction compared with the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the structure of an embodiment of the utility model;

[0023] Figure 2 for Figure 1 A schematic diagram of a partial enlarged view of the center A;

[0024] Figure 3 The schematic diagram of the structure of the load-bearing plate of the utility model on the PSB fine-rolled threaded steel bar when the load-bearing plate of the utility model is unfolded, that is, the schematic diagram of the state when the load-bearing plate of the utility model passes through the non-enlarged head section of the anchor hole;

[0025] Figure 4 It is a structural schematic diagram of an embodiment of a load-bearing plate of the utility model;

[0026] Markings in the figure: 1. anchor hole, 11. non-enlarged head section, 12. enlarged head section, 2. PSB fine-rolled threaded steel, 3. protective sleeve, 4. flexible sealing ring, 5. load-bearing structure, 51. bottom plate, 511. fastening nut, 512. through hole, 52. load-bearing plate, 521. groove, 522. slot, 53. mounting plate, 531. pin, 54. slide rod. DETAILED DESCRIPTION

[0027] The present invention is further described below in conjunction with the embodiments, which are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, other embodiments obtained by ordinary technicians in the field without creative work are all within the protection scope of the present invention.

[0028] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model; the terms "first", "second", and "third" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance; in addition, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0029] In conjunction with the accompanying drawings, the utility model of the enlarged head anti-floating anchor rod based on PSB fine-rolled threaded steel comprises a PSB fine-rolled threaded steel 2 for implanting in the anchor hole 1, and a plurality of bearing structures 5 are arranged at intervals on the PSB fine-rolled threaded steel 2 located in the enlarged head section 12 of the anchor hole 1, the bearing structure 5 comprises a base plate 51 for connecting to the PSB fine-rolled threaded steel 2, a plurality of bearing plates 52 are rotatably connected to the base plate 51, and the bearing plates 52 can be rotated from an upright upward state to an inclined state or a horizontal state on the base plate 51; the distance between the center of gravity of the bearing plate 52 and the axis of the PSB fine-rolled threaded steel 2 is A, and the distance between the rotation center line of the bearing plate 52 and the base plate 51 and the axis of the PSB fine-rolled threaded steel 2 is B, wherein A is greater than B.

[0030] Among them, in the specific implementation process, when the bearing plate is in a folded state (that is, the bearing plate is in an upright state at this time), since the center of gravity of the bearing plate is farther away from the axis of the PSB fine-rolled rebar than the rotation center of the bearing plate, when the top of the bearing plate enters the enlarged head section of the anchor hole, the bearing plate loses the shielding and restriction of the wall of the anchor hole, and the bearing plate can rotate along the bottom plate to an inclined state or a horizontal state under the action of its own weight.

[0031] As a matter of course, a threaded through hole is provided in the middle of the bottom plate 51, so that the bottom plate 51 can be sleeved on the PSB finished rolled threaded steel bar 2. Preferably, the bottom plate 51 is provided with a fastening nut 511, so as to lock the position of the bottom plate 51 on the PSB finished rolled threaded steel bar 2.

[0032] In the specific implementation process, the outer periphery of the PSB fine-rolled threaded steel bar 2 located in the non-enlarged head section 11 of the anchor hole 1 is provided with a protective sleeve 3, and a flexible sealing ring 4 is installed at the lower end of the protective sleeve 3. Lubricating anti-corrosion grease is filled in the protective sleeve 3 to facilitate the movement of the PSB fine-rolled threaded steel bar 2 during tensioning and the subsequent anti-corrosion effect. The upper end of the PSB fine-rolled threaded steel bar 2 extends out of the anchor hole 1 and is equipped with an anchor head and an anchor plate. After the PSB fine-rolled threaded steel bar 2 is implanted in the anchor hole, concrete is poured to facilitate the PSB fine-rolled threaded steel bar to be buried in the anchor hole. Those skilled in the art can understand this clearly and will not be repeated here.

[0033] In the utility model, when the load-bearing plate 52 is rotated to the lowest position (that is, when the load-bearing plate can no longer be rotated), the load-bearing plate 52 is in an inclined state or a horizontal state, and the load-bearing plate 52 can be expanded away from the PSB fine-rolled threaded steel 2, so as to achieve the purpose of the outer end of the load-bearing plate being at a distance from the axis of the PSB fine-rolled steel being greater than the radius of the non-enlarged head section of the anchor hole, so that when each load-bearing plate is in an expanded state (inclined state or horizontal state), the size of the outer end of each load-bearing plate is greater than the diameter of the non-enlarged head section of the anchor hole, thereby achieving the purpose of expanding the load-bearing plate.

[0034] When the bearing plate 52 is rotated to an inclined state or a horizontal state, the center of gravity of the bearing plate 52 will be further away from the axis of the PSB finely rolled threaded steel bar 2. Therefore, when the bearing plate 52 is in an upright state, the center of gravity of the bearing plate 52 is further away from the axis of the PSB finely rolled threaded steel bar 2 than the rotation center of the bearing plate 52, which ensures that the bearing plate 52 can rotate on the bottom plate under the action of its own weight.

[0035] In some embodiments, at least two pin seats are evenly arranged on the bottom plate 51 , and the supporting plate 52 is rotatably connected to the pin seats via the pin shaft 531 .

[0036] In some embodiments, four "L"-shaped mounting plates 53 are arranged at the four corners of the bottom plate 51, and two mutually perpendicular pin holes are provided on the mounting plates 53, and the pin holes are sleeved with a pin 531 for rotationally connecting the carrier plate 52. That is to say, the pin seat is the mounting plate 53, and two mutually perpendicular pin holes are provided on each mounting plate 53. The two coaxial pin holes and a matching pin 531 on two adjacent mounting plates 53 are used to install one carrier plate 52. The other pin hole on the mounting plate 53 is used to install another carrier plate 52. That is to say, four "L"-shaped mounting plates 53 are used to install four carrier plates 52.

[0037] In the specific implementation process, two, three or four bearing plates 52 can be rotatably connected to the bottom plate 51. As a preferred embodiment of the utility model, four bearing plates 52 are rotatably connected to the bottom plate 51, so as to increase the contact area between the bearing plates 52 and the poured concrete as much as possible while ensuring the strength of the bearing plates, and finally achieve the purpose of improving the anti-floating ability of the anchor rod.

[0038] In some embodiments, the bearing plate 52 has a groove 521 provided along the length direction of the bearing plate 52. The design of the groove 521 makes the contact area between the bearing plate 52 and the poured concrete larger, so as to further increase the static friction between the bearing plate and the concrete. In the specific implementation process, the bearing plate can be made of channel steel.

[0039] In some embodiments, the groove 521 is formed on a side of the bearing plate 52 for receiving the poured concrete. That is, when the bearing plate 52 is in an inclined or horizontal state, the groove 52 is formed on the upper end surface of the bearing plate, so that after pouring the concrete, the groove can be filled with concrete.

[0040] In some embodiments, the bottom plate 51 has a supporting surface for supporting the end surface of the supporting plate 52 when the supporting plate 52 rotates to the lowest position. That is to say, when the supporting plate 52 rotates to the lowest position, the end surface of the supporting plate 52 and the bottom plate 51 support each other, and the bottom plate is used to limit the supporting plate.

[0041] As a preferred embodiment of the present invention, the bearing plate 52 is in a horizontal state after rotating on the bottom plate 51, so as to maximize the contact area between the bearing plate and the poured concrete.

[0042] In some embodiments, an even number of carrier plates 52 are arranged on the bottom plate 51, through holes 512 are provided on the bottom plate 51 at positions corresponding to the carrier plates 52, a slide bar 54 is installed in the through hole 512, a slot 522 adapted to the slide bar 54 is provided on the carrier plates 52, and the carrier plates 52 are supported by the slide bar 54 after being unfolded on the bottom plate 51. The slide bar is used to improve the tightness of the connection between the carrier plates.

[0043] In some embodiments, the through hole 512 is a stepped hole, the slide bar 54 has a large diameter end and a small diameter end, and the small diameter end of the slide bar 54 passes through the through hole 512 and is inserted into the slot 522 of the carrier plate 52 .

[0044] In the specific implementation process, for example, a bearing plate is arranged along four directions (for the convenience of description, it is divided into the front, rear, left and right) on the bottom plate, and two through holes are opened in the longitudinal and transverse directions of the horizontal plane. When the bearing plate in front of the bottom plate is unfolded to a horizontal state, the bearing plate in front hits the slide bar backward, so that the slide bar moves from the front of the bottom plate to the rear, and then uses the slide bar extending from the bottom plate to extend into the card slot of the bearing plate behind the bottom plate. When the bearing plate behind the bottom plate is unfolded to a horizontal state, the bearing plate in the rear hits the slide bar forward, so that the slide bar moves from the rear of the bottom plate to the front, and then uses the slide bar extending from the bottom plate to extend into the card slot of the bearing plate in front of the bottom plate. Finally, the slide bar is used to support the bearing plates in front and behind the bottom plate. Thereby, when the bearing plate is subjected to force, the bearing plate can not only be subjected to force by the rotating connection with the base (such as a pin), but also by the slide bar, so as to increase the bearing force of the bearing plate.

[0045] The slot 522 and the groove 521 are respectively arranged on two opposite surfaces of the carrier plate 52, and the length and width of the slot 522 match the size of the slide bar 54. The slot 522 should penetrate the bottom surface of the carrier plate 52 so that the slide bar 54 can be inserted. At the same time, in actual use, even if the carrier plate 52 in one direction (for example, the front carrier plate) has touched the slide bar 54 so that the slide bar moves toward the rear of the bottom plate, and the rear carrier plate 52 has not been fully unfolded; when the rear carrier plate 52 is fully unfolded, the slide bar can also be inserted into the slot 522 in the rear carrier plate 52.

[0046] As a preferred embodiment of the present invention, the length of the slide rod 54 matches the length of the mounting plate 53 so that the slide rod 54 will not affect the non-enlarged head section 11 of the anchor hole, and the slide rod 54 can be hit by the rotating bearing plate 52.

[0047] In some embodiments, the positions of the bearing plates 52 on the upper and lower adjacent bearing structures on the PSB finished rolled threaded steel bar 2 are staggered. That is, the bearing plates on the upper and lower adjacent bearing structures are arranged on the PSB finished rolled threaded steel bar along different directions, so that the forces transmitted to the PSB finished rolled threaded steel bar by each bearing structure can be transmitted along different directions, so as to improve the uniformity of the force on the PSB finished rolled threaded steel bar.

[0048] During the construction process of the enlarged head anti-floating anchor rod based on PSB fine-rolled threaded steel of the utility model, when the PSB fine-rolled threaded steel enters the non-enlarged head section of the anchor hole, the hole wall of the anchor hole gives a certain limiting effect to the bearing plate of the bearing structure and does not rotate. The bearing plate is in an upright state and smoothly passes through the non-enlarged head section of the anchor hole; when the top of the bearing plate of the bearing structure enters the enlarged head section of the anchor hole, the bearing plate loses the limiting effect of the hole wall of the anchor hole, and the bearing plate rotates along the bottom plate under the action of its own weight to achieve expansion. When the bearing plate hits one end of the sliding rod on the bottom plate, the sliding rod is squeezed, so that the sliding rod extends outward from another direction and extends into the card slot of the bearing plate corresponding to the sliding rod, thereby supporting the bearing plate. Compared with the existing expandable anti-floating anchor rod, the utility model has the advantages of simple structure and ingenious design, and does not require a separate expansion operation during the construction process. Therefore, the structure of the utility model has the advantages of low manufacturing cost and convenient construction compared with the prior art.

[0049] In summary, the utility model has the characteristics of simple structure and convenient operation while increasing the contact area between the bearing plate and the poured concrete, thereby achieving the purpose of reducing the production cost of the anchor rod and improving the construction efficiency of the anti-floating anchor rod.

Claims

1. An enlarged head anti-floating anchor rod based on PSB fine rolled threaded steel, comprising a PSB fine rolled threaded steel (2) for implantation in an anchor hole (1), a plurality of bearing structures (5) are arranged at intervals on the PSB fine rolled threaded steel (2) in the enlarged head section (12) of the anchor hole (1), characterized in that: The bearing structure (5) comprises a bottom plate (51) for connecting to the PSB fine-rolled threaded steel (2); a plurality of bearing plates (52) are rotatably connected to the bottom plate (51); the bearing plates (52) can be rotated on the bottom plate (51) from an upright position to an inclined position or a horizontal position; the distance between the center of gravity of the bearing plate (52) and the axis of the PSB fine-rolled threaded steel (2) is A, and the distance between the rotation center line of the bearing plate (52) and the bottom plate (51) and the axis of the PSB fine-rolled threaded steel (2) is B, wherein A is greater than B.

2. The enlarged head anti-floating anchor rod based on PSB fine-rolled threaded steel according to claim 1 is characterized in that: At least two pin seats are evenly arranged on the bottom plate (51), and the bearing plate (52) is rotatably connected to the pin seats via the pin shaft (531).

3. The enlarged head anti-floating anchor rod based on PSB fine-rolled threaded steel according to claim 2 is characterized in that: Four "L"-shaped mounting plates (53) are arranged at the four corners of the bottom plate (51), and two mutually perpendicular pin holes are provided on the mounting plates (53). Pins (531) for rotatably connecting the bearing plate (52) are sleeved in the pin holes.

4. The enlarged head anti-floating anchor rod based on PSB fine-rolled threaded steel according to any one of claims 1 to 3, characterized in that: The carrying plate (52) has a groove (521) opened along the length direction of the carrying plate.

5. The enlarged head anti-floating anchor rod based on PSB fine-rolled threaded steel according to claim 4 is characterized in that: The groove (521) is formed on one side of the bearing plate (52) for receiving the poured concrete.

6. The enlarged head anti-floating anchor rod based on PSB fine-rolled threaded steel according to claim 1, characterized in that: The bottom plate (51) has a supporting surface for supporting the end surface of the supporting plate (52) when the supporting plate (52) rotates to the lowest position.

7. The enlarged head anti-floating anchor rod based on PSB fine-rolled threaded steel according to claim 6, characterized in that: An even number of carrying plates (52) are arranged on the bottom plate (51); a through hole (512) is provided on the bottom plate (51) at a position corresponding to the carrying plate (52); a sliding rod (54) is installed in the through hole (512); a clamping groove (522) adapted to the sliding rod (54) is provided on the carrying plate (52); and the carrying plate (52) is supported by the sliding rod (54) after being unfolded on the bottom plate (51).

8. The enlarged head anti-floating anchor rod based on PSB fine-rolled threaded steel according to claim 7, characterized in that: The through hole (512) is a stepped hole, the sliding rod (54) has a large diameter end and a small diameter end, and the small diameter end of the sliding rod (54) passes through the through hole (512) and is inserted into the slot (522) of the bearing plate (52).

9. The enlarged head anti-floating anchor rod based on PSB fine-rolled threaded steel according to claim 1, characterized in that: The positions of the bearing plates (52) on the upper and lower adjacent bearing structures (5) on the PSB fine-rolled threaded steel bars (2) are staggered with each other.

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