Anti-floating anchor rod structure of PSB finish rolling deformed steel bar with variable cross section of rod body

Abstract

The utility model discloses a rod body variable cross-section PSB finish rolling deformed steel bar anti-floating anchor rod structure which comprises an anchor rod body, a bottom plate, a concrete cushion layer and a grouting body, and the anchor rod body sequentially penetrates through the bottom plate, the concrete cushion layer and the grouting body from top to bottom. The anchor rod body is sequentially sleeved with a first high-strength nut, an anchoring plate, a spiral stirrup, an anti-corrosion coating, a first centering support, a first reducing sleeve, a second centering support, a second reducing sleeve, a third centering support, a bearing plate and a second high-strength nut from top to bottom, and the first high-strength nut and the second high-strength nut are the same in structure. The first centering support, the second centering support and the third centering support are the same in structure, and the first reducing sleeve and the second reducing sleeve are the same in structure. The bottom plate comprises an upper bottom plate and a lower bottom plate which are arranged in parallel, bottom plate main reinforcements are arranged at the bottom of the upper bottom plate and the upper part of the lower bottom plate, and bent reinforcements are arranged between the upper bottom plate and the lower bottom plate.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of building engineering, concretely relates to a rod body variable cross section PSB finish rolled threaded steel anti floating anchor rod structure. BACKGROUND

[0002] Anti floating anchor rod is widely used in the anti floating of building engineering underground structure. Its principle is that the top steel bar of anti floating anchor rod is reliably connected with the bottom plate of reinforced concrete structure, the steel bar in anti floating anchor rod is tightly bonded together with anchoring body, the stress of anchor rod is transmitted to anchoring body from the top steel bar of anchor rod and downward, and the anchoring body generates opposite friction force with surrounding soil layer, so that the anti floating effect of anti floating anchor rod is realized.

[0003] The anchor rod body generally adopts ordinary hot rolled steel bar, grouting process, and has problems of low anchor rod uplift bearing capacity, small arrangement spacing, large material consumption and the like. Meanwhile, according to the anchor rod pulling load transmission mechanism and related research on anchor rod critical anchoring length, combined with field test, the stress of anti floating anchor rod steel bar in sandy pebble stratum is significantly reduced below 6m of buried depth, and the ordinary anchor rod reinforcement is usually uniformly arranged along the full length, so that there is a large material waste problem. UTILITARY MODEL

[0004] The utility model aims at solving the above problems, and provides a variable cross section PSB finish rolled threaded steel anti floating anchor rod structure which can effectively improve the uplift bearing capacity of anchor rod body and simultaneously connect variable cross section PSB finish rolled threaded steel.

[0005] To solve the above technical problems, the technical scheme of the utility model is as follows: a rod body variable cross section PSB finish rolled threaded steel anti floating anchor rod structure, which comprises an anchor rod body, a bottom plate, a concrete cushion layer and a grouting body, the anchor rod body passes through the bottom plate, the concrete cushion layer and the grouting body from top to bottom in sequence, a first high-strength nut, an anchoring plate, a spiral hoop, a corrosion-resistant coating, a first centering support, a first variable-diameter sleeve, a second centering support, a second variable-diameter sleeve, a third centering support, a bearing plate and a second high-strength nut are sequentially sleeved on the anchor rod body from top to bottom, the first high-strength nut and the second high-strength nut are the same in structure and are located at the two ends of the anchor rod body, the first centering support, the second centering support and the third centering support are the same in structure, and the first variable-diameter sleeve and the second variable-diameter sleeve are the same in structure; the bottom plate comprises parallelly arranged upper and lower bottom plates, the bottom of the upper bottom plate and the upper portion of the lower bottom plate are each provided with a bottom plate main reinforcement, and a bent reinforcement is arranged between the upper and lower bottom plates.

[0006] Preferably, the grouting body is an expansion body structure formed by rotary jet grouting process, that is, an anchoring body, the grouting body cooperates with the anchor rod body, and the uplift bearing capacity of the anchor rod body as a whole is effectively improved.

[0007] Preferably, the bent reinforcement is a bottom plate anti-cutting reinforcement, and the bent reinforcement is arranged in two directions in the bottom plate and is bound with the bottom plate main reinforcement in the bottom plate.

[0008] Preferably, the bottom plate main reinforcement is arranged in a double-layer and double-directional manner in the bottom plate.

[0009] Preferably, the spiral stirrup is used for increasing the contact area of the bottom plate and the anchor rod body, enhancing the anchoring strength, and fixing the anchoring plate at a designed height in the bottom plate.

[0010] Preferably, the anticorrosive coating covers the anchor rod body within a range of 2 m below the concrete cushion.

[0011] Preferably, the spacing between the first centering support, the second centering support and the third centering support is 2 m, so as to ensure that the anchor rod body is in the middle of the drill hole and is subjected to axial force.

[0012] Preferably, the first variable-diameter sleeve and the second variable-diameter sleeve are used for connecting the steel bars.

[0013] Preferably, the bearing plate increases the contact area of the anchor rod body and the anchoring body, strengthens the adhesion of the anchor rod body and the anchoring body, improves the pull-out bearing capacity of the anti-floating anchor rod, and has a centering effect on the rod body.

[0014] The rod body variable cross-section PSB finish rolled threaded steel anti-floating anchor rod structure has the advantages that:

[0015] 1. The rod body variable cross-section PSB finish rolled threaded steel anti-floating anchor rod structure can effectively improve the pull-out bearing capacity of the anchor rod body through the expansion structure formed by the rotary jet process.

[0016] 2. The rod body variable cross-section PSB finish rolled threaded steel anti-floating anchor rod structure can effectively reduce material waste and reduce costs through the three-section reinforcement, and the diameter of the steel bars gradually decreases from top to bottom.

[0017] 3. The rod body variable cross-section PSB finish rolled threaded steel anti-floating anchor rod structure can increase the contact area of the anchor rod body and the anchoring body, strengthen the adhesion of the anchor rod body and the anchoring body, improve the pull-out bearing capacity of the anti-floating anchor rod, and has a centering effect on the rod body. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a structural schematic view of the rod body variable cross-section PSB finish rolled threaded steel anti-floating anchor rod structure of the rod body variable cross-section PSB finish rolled threaded steel anti-floating anchor rod structure.

[0019] Figure 2 is a structural schematic view of the first centering support of the rod body variable cross-section PSB finish rolled threaded steel anti-floating anchor rod structure.

[0020] Figure 3 is a structural schematic view of the first variable-diameter sleeve of the rod body variable cross-section PSB finish rolled threaded steel anti-floating anchor rod structure.

[0021] Figure 4 is a structural schematic view of the rod body variable cross-section PSB finish rolled threaded steel anti-floating anchor rod structure. Figure 3 is a sectional view of A-A of the rod body variable cross-section PSB finish rolled threaded steel anti-floating anchor rod structure.

[0022] Figure 5 is the utility model Figure 3 the cross section schematic view of B-B in it;

[0023] Figure 6 is the utility model second variable diameter sleeve structure schematic view;

[0024] Figure 7 is the utility model Figure 6 the cross section schematic view of C-C in it;

[0025] Figure 8 is the utility model Figure 6 the cross section schematic view of D-D in it;

[0026] Figure 9 is the utility model bearing plate structure schematic view;

[0027] Figure 10 is the utility model bent reinforcement structure schematic view.

[0028] Reference signs: 1, anchor rod body;2, bottom plate;3, concrete cushion;4, grouting body;5, water stop adhesive tape;10, first high-strength nut;11, anchor plate;12, spiral stirrup;13, anticorrosive coating;14, first centering support;15, first variable diameter sleeve;16, second centering support;17, second variable diameter sleeve;18, third centering support;19, bearing plate;20, second high-strength nut;21, upper bottom plate;22, lower bottom plate;23, bottom plate main reinforcement;24, bent reinforcement;101, first rod body;102, second rod body;103, third rod body;141, center through hole. Specific embodiments

[0029] The utility model will be further explained in connection with the drawings and specific embodiments:

[0030] As Figures 1 to 10As shown, the utility model provides a kind of pole body variable cross section PSB finish rolling screw steel anti-floating anchor rod structure, including anchor rod body 1, bottom plate 2, concrete cushion 3 and grouting body 4, anchor rod body 1 is sequentially passed bottom plate 2, concrete cushion 3 and grouting body 4 from top to bottom, first high-strength nut 10, anchor plate 11, spiral hoop 12, anticorrosive coating 13, first centering support 14, first reducing sleeve 15, second centering support 16, second reducing sleeve 17, third centering support 18, bearing plate 19 and second high-strength nut 20 are sequentially sleeved on anchor rod body 1 from top to bottom, first high-strength nut 10 and second high-strength nut 20 are same in structure, and located at both ends of anchor rod body 1, first centering support 14, second centering support 16 and third centering support 18 are same in structure, and first reducing sleeve 15 and second reducing sleeve 17 are same in structure.The bottom plate 2 includes the upper bottom plate 21 and the lower bottom plate 22 arranged in parallel, the bottom of the upper bottom plate 21 and the upper portion of the lower bottom plate 22 are provided with the bottom plate main reinforcement 23, and the bending reinforcement 24 is arranged between the upper bottom plate 21 and the lower bottom plate 22.

[0031] The grouting body 4 is an expansion structure formed by rotary jet grouting process, i.e., an anchoring body, and the grouting body 4 cooperates with the anchor rod body 1 to effectively improve the overall uplift bearing capacity of the anchor rod body 1.

[0032] In actual use, the existing sand pebble stratum is generally greater than 50 cm, the grouting body 4 can effectively increase the contact area and bonding strength of the soil body and the grouting body, and cooperates with the anchor rod body 1 made of finish rolling screw steel to effectively improve the overall uplift bearing capacity of the anchor rod.

[0033] The bending reinforcement 24 is a bottom plate anti-cutting reinforcement, and the bending reinforcement 24 is arranged in two directions in the bottom plate 2 and is bound with the bottom plate main reinforcement 23 in the bottom plate 2.

[0034] In the embodiment, the bending reinforcement 24 has a trapezoidal structure, the long side of the trapezoidal structure has one end directed to the upper bottom plate 21 and the other end directed to the lower bottom plate 22. The length of the bottom of the bending reinforcement 24 is 20d, and d is the diameter of the bending reinforcement. In actual use, the diameter of the bending reinforcement is 20 mm.

[0035] The bottom plate main reinforcement 23 is arranged in a double-layer and two-directional manner in the bottom plate 2. The bottom plate main reinforcement 23 has a cylindrical structure and is symmetrically arranged on and fixed to the upper bottom plate 21 and the lower bottom plate 22, thereby being arranged in a double-layer and two-directional manner. The upper and lower portions of the bending reinforcement 24 respectively abut against the bottom plate main reinforcement 23, thereby supporting the bottom plate 2.

[0036] The spiral hoop 12 is used to increase the contact area of the bottom plate 2 and the anchor rod body 1, to enhance the anchoring strength, and to fix the anchor plate 11 at a design height in the bottom plate 2.

[0037] The spiral stirrup 12 is Φ10, the interval is 50mm, and L=300mm, wherein L is the length.

[0038] A waterproof rubber strip 5 is further arranged between the base plate 2 and the concrete cushion 3, and the waterproof rubber strip 5 is sleeved on the anchor rod body 1, thereby playing a water-proof role on the anchor rod body 1, and increasing the service life of the anchor rod body 1.

[0039] The anticorrosive coating 13 covers the anchor rod body 1 within a range of 2m below the concrete cushion 3. The anticorrosive coating 13 is an epoxy resin coating, and the thickness is 0.3mm.

[0040] The interval between the first centering support 14, the second centering support 16 and the third centering support 18 is 2m, thereby ensuring that the anchor rod body 1 is in the middle of the drilling hole and is subjected to axial force. In the embodiment, the first centering support 14, the second centering support 16 and the third centering support 18 have the same structure. The first centering support 14 is a plate structure, the cross section of the first centering support 14 is a gear structure, the middle of the first centering support 14 is a center through hole 141, and the anchor rod body 1 is arranged in the center through hole 141 of the first centering support 14. The first centering support 14, the second centering support 16 and the third centering support 18 respectively play a centering role on the anchor rod body 1.

[0041] The first variable-diameter sleeve 15 and the second variable-diameter sleeve 17 are used for connecting the steel bars. The first variable-diameter sleeve 15 and the second variable-diameter sleeve 17 have the same shape, and the difference lies in that the size parameters are different. The cross section of the first variable-diameter sleeve 15 is a regular hexagonal block structure, a first variable-diameter sleeve through hole is arranged in the middle, and the diameters of the two ends of the first variable-diameter sleeve through hole are gradually distributed. The longest size of the first variable-diameter sleeve 15 and the second variable-diameter sleeve 17 is 70mm, the top diameter size of the first variable-diameter sleeve through hole is 40mm, the bottom diameter size is 36mm, a second variable-diameter sleeve through hole is arranged in the middle of the second variable-diameter sleeve 17, the top diameter of the second variable-diameter sleeve through hole is 36mm, and the bottom diameter is 25mm. The first variable-diameter sleeve through hole and the second variable-diameter sleeve through hole are both screw hole structures. The length of the first variable-diameter sleeve 15 and the second variable-diameter sleeve 17 is 180mm.

[0042] In the embodiment, the material of the anchor rod body 1 is a steel bar, and the anchor rod body 1 comprises a first rod body 101, a second rod body 102 and a third rod body 103. The first rod body 101 and the second rod body 102 are connected through the first variable-diameter sleeve 15, and the second rod body 102 and the third rod body 103 are connected through the second variable-diameter sleeve 17. In the embodiment, the first rod body 101, the second rod body 102 and the third rod body 103 are all external thread rod structures, the first variable-diameter sleeve 15 is threadedly connected with the first rod body 101 and the second rod body 102 respectively, and the second variable-diameter sleeve 17 is threadedly connected with the second rod body 102 and the third rod body 103 respectively.

[0043] The first rod body 101, the second rod body 102 and the third rod body 103 are all column structures, and the difference lies in that the cross-sectional diameters of the first rod body 101, the second rod body 102 and the third rod body 103 are different. In the embodiment, the cross-sectional diameters of the first rod body 101, the second rod body 102 and the third rod body 103 decrease in turn. The bottom of the first rod body 101 is connected with the end of the first variable-diameter sleeve 15, the other end of the first variable-diameter sleeve 15 is connected with the upper end of the second rod body 102, the lower end of the second rod body 102 is connected with the end of the second variable-diameter sleeve 17, and the other end of the second variable-diameter sleeve 17 is connected with the upper end of the third rod body 103. The surfaces of the first rod body 101, the second rod body 102 and the third rod body 103 are all external thread structures, the first high-strength nut 10 is sleeved on the upper end of the first rod body 101, and the second high-strength nut 20 is sleeved on the lower end of the third rod body 103.

[0044] The anchor rod body 1 adopts PSB finish rolling threaded steel, which can effectively improve the uplift bearing capacity of the anchor rod body. From top to bottom, the anchor rod body is installed through three sections, the diameter of the reinforcing steel gradually decreases, the material waste is effectively reduced, and the cost is reduced.

[0045] The bearing plate 19 is in a disc structure, the cross section of the bearing plate 19 is a circular ring, the outer diameter is 135mm, the inner diameter is 48mm, and the thickness is 18mm. The bearing plate 19 increases the contact area of the anchor rod body 1 and the anchoring body, strengthens the adhesion of the anchor rod body 1 and the anchoring body, improves the uplift bearing capacity of the anti-floating anchor rod, and has a centering effect on the rod body.

[0046] Those skilled in the art will appreciate that the embodiments described herein are intended to facilitate the understanding of the principles of the present application and should be understood as not limiting the scope of protection of the present application to such specific statements and embodiments. Those skilled in the art can make various other specific modifications and combinations of the present application according to the technical inspirations disclosed in the present application without departing from the essence of the present application, and these modifications and combinations still fall within the scope of protection of the present application.

Claims

1. A structure of anti-floating anchor rod of post body variable cross-section (PSB) finish rolled threaded steel, characterized in that: The utility model provides an anchor rod, which comprises an anchor rod body (1), a bottom plate (2), a concrete cushion (3) and a grouting body (4), the anchor rod body (1) passes through the bottom plate (2), the concrete cushion (3) and the grouting body (4) in sequence from top to bottom, a first high-strength nut (10), an anchoring plate (11), a spiral hoop (12), an anticorrosive coating (13), a first centering support (14), a first variable-diameter sleeve (15), a second centering support (16), a second variable-diameter sleeve (17), a third centering support (18), a bearing plate (19) and a second high-strength nut (20) are sequentially sleeved on the anchor rod body (1) from top to bottom, the first high-strength nut (10) and the second high-strength nut (20) are the same in structure and are located at both ends of the anchor rod body (1), the first centering support (14), the second centering support (16) and the third centering support (18) are the same in structure, and the first variable-diameter sleeve (15) and the second variable-diameter sleeve (17) are the same in structure.

2. The anti-floating anchor bar structure of the variable cross-section PSB finish rolled threaded steel according to claim 1, characterized in that: The grouting body (4) is an expansion body structure formed by a rotary jet grouting process, that is, an anchoring body, the grouting body (4) cooperates with the anchor rod body (1) to effectively improve the overall pullout bearing capacity of the anchor rod body (1).

3. The anti-floating anchor bar structure of the variable cross-section PSB finish rolled threaded steel according to claim 1, characterized in that: The bent-up steel bars (24) are bottom plate punching shear resisting steel bars, and are arranged in two directions in the bottom plate (2) and are tied with the bottom plate main steel bars (23) in the bottom plate (2).

4. The anti-floating anchor bar structure of the variable cross-section PSB finish rolled threaded steel according to claim 1, characterized in that: The bottom plate main steel bars (23) are arranged in a double-layer and two-directional manner in the bottom plate (2).

5. The anti-floating anchor bar structure of the variable cross-section PSB finish rolled threaded steel according to claim 1, characterized in that: The spiral hoops (12) are used to increase the contact area of the bottom plate (2) and the anchor rod body (1), to enhance the anchoring strength, and to fix the anchoring plate (11) at a designed height in the bottom plate (2).

6. The anti-floating anchor bar structure of the finished rolled thread steel with variable cross-section of the PSB rod body according to claim 1, characterized in that: The anticorrosive coating (13) covers the anchor rod body (1) in a range of 2 m below the concrete cushion (3).

7. The anti-floating anchor bar structure of the finished rolled thread steel with variable cross-section of the PSB rod body according to claim 1, characterized in that: The spacing between the first centering support (14), the second centering support (16) and the third centering support (18) is 2 m, so that the anchor rod body (1) is located in the middle of the drill hole and is subjected to axial stress.

8. The anti-floating anchor bar structure of the finished rolled thread steel with variable cross-section of the PSB rod body according to claim 1, characterized in that: The first variable-diameter sleeve (15) and the second variable-diameter sleeve (17) are used to connect steel bars.

9. The anti-floating anchor bar structure of the finished rolled thread steel with variable cross-section of the PSB rod body according to claim 1, characterized in that: The bearing plate (19) increases the contact area of the anchor rod body (1) and the anchoring body, strengthens the bonding of the anchor rod body (1) and the anchoring body, improves the pullout bearing capacity of the anti-floating anchor rod, and has a centering effect on the anchor rod body.

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