Novel anti-floating anchor rod

Abstract

The utility model discloses a novel anti-floating anchor rod. A bottom anchoring part is connected with a top anchoring part through an anchor cable; an anchor bearing plate in the top anchoring part is composed of a lower pressure-bearing plate and an upper pressure-bearing cylinder, the lower end face of the upper pressure-bearing cylinder is connected with the lower pressure-bearing plate in a semi-embedded mode, the lower pressure-bearing plate is provided with a first center hole, the upper pressure-bearing cylinder is provided with a second center hole, the upper pressure-bearing cylinder is provided with a grouting hole, and the grouting hole is connected with the first center hole. An anchorage device installation position is arranged on the upper end face of the upper pressure-bearing cylinder, the working anchorage device is arranged at the anchorage device installation position, an anchor cable clamping ring is arranged in the working anchorage device in an embedded mode, and the upper end of the anchor cable is clamped by the anchor cable clamping ring. According to the anti-floating anchor rod, the grouting hole and the second center hole are formed in the upper pressure-bearing cylinder, so that the anti-floating anchor rod can be tensioned before grouting is completed, and the phenomenon that foundation water seeps to the top of the anchor rod along a rod body gap to cause water leakage of an underground layer due to the fact that materials on the surface of the anchor rod are torn and scratched after grout is hardened is avoided.

Description

Technical Field

[0001] The utility model relates to an anti-floating anchor rod, in particular to a novel anti-floating anchor rod. Background Art

[0002] An anti-floating anchor rod is a fixing device used to prevent underground buildings from floating up due to the buoyancy or uplift of groundwater. It is mainly used in underground projects such as basements, underground garages, and subway stations. It is made of high-strength steel bars or steel cables, including anchoring sections, free sections, and connectors, and is tightly bonded to the foundation through grouting or expansion materials. Its main function is to prevent the structure from floating up, increase structural safety, and reduce foundation settlement. Anti-floating anchor rods are widely used in projects that require anti-floating, such as basements, underground parking lots, subway stations, and pools. The design and construction must take into account geological conditions, structural loads, and construction processes to ensure their effectiveness and safety. Existing anti-floating anchor rods are generally constructed using the post-tensioning method. When stress is applied to the anchor rod, the main bar of the rod body has a certain amount of elongation. Therefore, a gap for free expansion and contraction will be left between the lower load-bearing end (underground end) and the upper load-bearing end (tensioning anchor end), that is, the free section. After tensioning is completed, grouting is performed to seal the anchor. Because the shrinkage ratio of the rod material is different from that of the concrete, gaps will appear. The foundation water will seep up along the gaps in the rod to the tensioned anchoring end at the top of the anchor rod, that is, the upper plane of the bottom plate layer, causing underground leakage. Utility Model Content

[0003] The utility model discloses a novel anti-floating anchor rod, wherein the bottom anchoring part and the top anchoring part are connected by an anchor cable; the anchor pad in the top anchoring part is composed of a lower pressure-bearing plate and an upper pressure-bearing tube, the lower end face of the upper pressure-bearing tube is semi-embedded and connected to the lower pressure-bearing plate, the lower pressure-bearing plate is provided with a first center hole, the upper pressure-bearing tube is provided with a second center hole, the upper pressure-bearing tube is provided with a grouting hole, the grouting hole is connected to the first center hole, the upper end face of the upper pressure-bearing tube is provided with an anchor mounting position, the working anchor is provided at the anchor mounting position, an anchor cable clamp is embedded in the working anchor, and the upper end of the anchor cable is clamped by the anchor cable clamp. By providing the grouting hole and the second center hole in the upper pressure-bearing tube, the utility model realizes that the anti-floating anchor rod can be pre-tensioned before full grouting, thereby avoiding the material on the anchor rod surface being torn and scratched after the slurry hardens, thereby causing foundation water to seep up along the gap of the rod body to the top of the anchor rod and cause underground water leakage.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A novel anti-floating anchor rod comprises: a bottom anchoring portion, a top anchoring portion, and an anchor cable, wherein the bottom anchoring portion and the top anchoring portion are connected by the anchor cable;

[0006] The top anchoring part is composed of an anchor plate and a working anchor. The anchor plate is composed of a lower pressure plate and an upper pressure tube. The lower end face of the upper pressure tube is semi-embedded and connected to the lower pressure plate. The lower pressure plate is provided with a first center hole. A positioning ring is provided on the upper end face of the lower pressure plate. A mounting steel bar is provided on the upper pressure tube. The second center hole is provided. The first center hole and the second center hole are connected. The upper pressure tube is provided with a grouting hole. The grouting hole is connected to the first center hole. An anchor installation position is provided on the upper end face of the upper pressure tube. The working anchor is provided at the anchor installation position. An anchor cable clamp is embedded in the working anchor, and the upper end of the anchor cable is clamped by the anchor cable clamp.

[0007] It is further configured that the bottom anchoring part includes: a guide bracket and a bearing plate, the guide bracket is connected to the bearing plate, the lower end of the anchor cable is connected to the bearing plate, and a guide cone cap is provided at the lower end of the guide bracket.

[0008] It is further configured that the bearing plate is provided with: a guide bracket mounting hole, an anchor cable hole, and a grouting pipe hole. The guide bracket is connected to the guide bracket mounting hole. A sealing locking nut is sleeved in the anchor cable hole. A waterproof rubber ring is provided on the inside of the sealing locking nut. The anchor cable passes through the sealing locking nut and is connected to the extrusion sleeve. An extrusion spring is provided on the inside of the extrusion sleeve. The grouting pipe hole is passed through by the grouting pipe.

[0009] Furthermore, the anchor cable, sealing lock nut, and extrusion sleeve located at the lower end surface of the bearing plate are sealed to the lower end surface of the bearing plate by a sealing tube, and the extrusion sleeve is filled with an anti-corrosion medium. The sealing tube and the anti-corrosion medium prevent the lower end of the anchor cable from being infiltrated by foundation water, further preventing the anchor cable from being used as a channel for foundation water to seep upward.

[0010] It is further arranged that the anchor cable is sleeved by a water-swelling rubber ring, the water-swelling rubber ring is arranged in the second center hole, and the water-swelling rubber ring is arranged below the grouting outlet of the grouting hole.

[0011] It is further provided that an isolation bracket is provided at a position of the anchor cable between the bottom anchoring portion and the top anchoring portion.

[0012] The utility model provides a grouting hole and a second center hole in the upper pressure-bearing cylinder, so that the anti-floating anchor rod can be pre-tensioned before full grouting, avoiding the material on the surface of the anchor rod being torn and scratched after the slurry hardens, thereby causing foundation water to seep up along the gap of the rod body to the top of the anchor rod and cause underground water leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the present invention in an application state;

[0014] Figure 2 For the present invention Figure 1A in the middle shows the enlarged structure diagram;

[0015] Figure 3 For the present invention Figure 1 The structure diagram at B is enlarged;

[0016] Figure 4 is a cross-sectional view of the split anchor plate of the present invention;

[0017] Figure 5 A top view of the carrier plate of the present invention;

[0018] Figure 6 A cross-sectional view of a carrier plate of the present invention;

[0019] Figure 7 A front view of the anchoring bracket of the present invention;

[0020] Figure 8 A bottom view of the anchoring bracket of the present invention;

[0021] Figure 9 A top view of the lower bearing plate of the present invention;

[0022] Figure 10 It is a schematic diagram of the existing technology application state;

[0023] In the figure: bottom anchoring part 1, guide bracket 21, guide cone cap 22,

[0024] Loading plate 3, guide bracket installation hole 31, anchor cable hole 32, grouting pipe hole 33,

[0025] Sealing tube 41, sealing locking nut 42 (with built-in waterproof rubber ring), extrusion sleeve 43 (with built-in extrusion spring), anti-corrosion medium 44,

[0026] Top anchoring part 5, anchor plate 6, lower pressure plate 61, first center hole 611, mounting steel bar 612, positioning ring 613, mounting steel bar 612, positioning ring 613, upper pressure cylinder 62, grouting hole 621, second center hole 622, anchor installation position 623, working anchor 7, anchor cable clamp 71,

[0027] Anchor cable 81 , isolation bracket 82 , water-swellable rubber ring 83 , anchor hole 91 , cushion layer 92 , waterproof steel casing 93 , fine stone concrete 94 , bottom plate layer 95 , surface layer 96 , anchor pad 101 . DETAILED DESCRIPTION

[0028] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0029] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0030] Next, the present invention is described in detail with reference to schematic diagrams. For ease of illustration, cross-sectional views of device structures may be partially enlarged and not to scale when describing the embodiments of the present invention. Furthermore, the schematic diagrams are merely illustrative and should not limit the scope of protection of the present invention. Furthermore, in actual production, three-dimensional dimensions, including length, width, and depth, should be included.

[0031] In order to make the purpose, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0032] According to the claims and the description, the specific implementation is as follows:

[0033] The utility model provides a novel anti-floating anchor rod, comprising: a bottom anchoring portion 1, a top anchoring portion 5, and an anchor cable 81, wherein the bottom anchoring portion 1 and the top anchoring portion 5 are connected by the anchor cable 81;

[0034] The top anchoring part 5 is composed of an anchor plate 6 and a working anchor 7. The anchor plate 6 is composed of a lower pressure-bearing plate 61 and an upper pressure-bearing tube 62. The lower end face of the upper pressure-bearing tube 62 is semi-embedded and connected to the lower pressure-bearing plate 61. The lower pressure-bearing plate 61 is provided with a first center hole 611. The upper end face of the lower pressure-bearing plate 61 is provided with a positioning ring 613. The upper end face of the lower pressure-bearing plate 61 is provided with a mounting steel bar 612. The upper pressure-bearing tube 62 is provided with a second center hole 622. The first center hole 611 and the second center hole 622 are connected. The upper pressure-bearing tube 62 is provided with a grouting hole 621. The grouting hole 621 is connected to the first center hole 611. The upper end face of the upper pressure-bearing tube 62 is provided with an anchor mounting position 623. The working anchor 7 is arranged at the anchor mounting position 623. An anchor cable clamp 71 is embedded in the working anchor 7. The upper end of the anchor cable 81 is clamped by the anchor cable clamp 71. The portion of the upper end of the anchor cable 81 clamped by the anchor cable clamp 71 is the location where the surface material of the anchor cable 81 is removed. The interior of the anchor cable 81 with the surface material removed is an unbonded steel strand, which facilitates the clamping of the anchor cable clamp 71 while preventing the surface material of the anchor cable 81 from being torn during the process of being clamped and stretched by the anchor cable clamp 71. If the surface material of the anchor cable 81 is torn, the underground foundation water will penetrate upward along the analysis between the unbonded steel strands.

[0035] The bottom anchoring unit 1 comprises a guide bracket 21 and a support plate 3. The guide bracket 21 is connected to the support plate 3, and the lower end of the anchor cable 81 is connected to the support plate 3. A guide cone cap 22 is provided at the lower end of the guide bracket 21. The guide bracket 21 is a three-pronged bracket made of steel bars, protecting the lower end of the anchor cable 81 from being punctured by gravel. The guide cone cap 22 protects the lower end of the guide bracket 21 and facilitates the lowering of the bottom anchoring unit 1.

[0036] The bearing plate 3 is provided with: a guide bracket mounting hole 31, an anchor cable hole 32, and a grouting pipe hole 33. The guide bracket 21 is connected to the guide bracket mounting hole 31. A sealing lock nut 42 is sleeved in the anchor cable hole 32. A waterproof rubber ring is provided inside the sealing lock nut 42. The anchor cable 81 passes through the sealing lock nut 42 and is connected to the extrusion sleeve 43. An extrusion spring is provided inside the extrusion sleeve 43. The grouting pipe hole 33 is passed through by the grouting pipe. The grouting pipe is provided to meet the requirement during the grouting process that the grouting pipe needs to be lower than the slurry surface to reduce the amount of air holes in the slurry caused by slurry impact.

[0037] The anchor cable 81, the sealing lock nut 42 and the extrusion sleeve 43 located on the lower end surface of the bearing plate 3 are sealed by the sealing tube 41 and the lower end surface of the bearing plate 3, thereby preventing the end surface of the anchor cable 81 from being penetrated by the underground foundation water.

[0038] The extrusion sleeve 43 is filled with an anti-corrosion medium 44. The anti-corrosion medium prevents the unbonded steel strand from rusting and decaying, thereby preventing the unbonded steel strand from rusting and causing its performance to deteriorate.

[0039] Anchor cable 81 is encased in a water-swellable rubber ring 83, which is positioned within second center hole 622 and below the grouting outlet of grouting hole 621. Water-swellable rubber ring 83 is positioned below the point where the surface material of anchor cable 81 is removed. When exposed to water, water-swellable rubber ring 83 fills the gap between anchor cable 81 and the inner wall of first center hole 611, further preventing groundwater seepage.

[0040] An isolation bracket 82 is provided at a position of the anchor cable 81 between the bottom anchor portion 1 and the top anchor portion 5 .

[0041] The utility model provides a new type of anti-floating anchor rod construction process:

[0042] Step 1: Drill the hole to meet the design requirements and enter the medium weathered layer.

[0043] Step 2: Place the bottom anchoring part 1 connected to the anchor cable 81 to the target depth, with spiral reinforcement provided on the bottom anchoring part 1;

[0044] Step 3: Place the waterproof steel casing 93 at the opening of the drill hole, and then pour a 10cm cushion waterproof steel casing into it. At the same time, waterproof the inner wall of the waterproof steel casing 93 and the cushion 92;

[0045] Note 1: Steps 2 and 3 can be reversed.

[0046] Step 4: Remove the surface material and oil from the anchor cable 81 above the cushion layer 92; insert the water-swellable rubber ring 83; the water-swellable rubber ring 83 is set at a position lower than the position where the surface material of the anchor cable 81 is removed. When the water-swellable rubber ring 83 comes into contact with water, it fills the gap between the anchor cable 81 and the inner wall of the first center hole 611 to further prevent the possibility of groundwater seepage;

[0047] Step 5: Stop grouting after grouting to the lower end surface of the waterproof steel casing 93, insert the threaded reinforcement, and then lower the lower pressure plate 61 on the cushion layer. The anchor cable 81 passes through the lower pressure plate 61;

[0048] Step 6: Place the anchor pad 6 on the lower pressure plate 61, and the anchor cable 81 passes through the first center hole 611 provided in the lower pressure plate 61, the second center hole 622 provided in the upper pressure cylinder 62, and the working anchor 7 in sequence, and is clamped by the anchor cable clamp ring 71. The portion clamped by the anchor cable clamp ring 71 is the unbonded steel strand of the anchor cable 81 with the surface material removed.

[0049] Step 7: The anchor cable 81 is tensioned by the winch and the tool anchor;

[0050] Step 8: After tensioning is completed, waterproof material is injected into the anchor hole 91 from the grouting hole 621 until it reaches the upper end surface of the lower pressure plate 61, and then grouting is performed until the second center hole 622 is filled.

[0051] Step 9: Bend the mounting steel bars 612 to a state where they can be connected to the steel bars of the bottom plate layer 95 according to construction requirements and connect them.

[0052] While the present invention has been described above with reference to specific embodiments, various modifications may be made and equivalent components may be substituted without departing from the scope of the present invention. In particular, as long as no structural conflicts exist, the various features of the embodiments disclosed herein may be combined with one another in any manner, and the omission of an exhaustive description of these combinations in this specification is solely for the sake of space and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions within the scope of the claims.

Claims

1. A new type of anti-floating anchor, characterized in that: include: A bottom anchoring portion (1), a top anchoring portion (5), and an anchor cable (81), wherein the bottom anchoring portion (1) and the top anchoring portion (5) are connected via the anchor cable (81); The top anchoring part (5) is composed of an anchor plate (6) and a working anchor (7). The anchor plate (6) is composed of a lower pressure-bearing plate (61) and an upper pressure-bearing cylinder (62). The lower end surface of the upper pressure-bearing cylinder (62) is semi-embedded and connected to the lower pressure-bearing plate (61). The lower pressure-bearing plate (61) is provided with a first center hole (611). The upper end surface of the lower pressure-bearing plate (61) is provided with a positioning ring (613). The upper end surface of the lower pressure-bearing plate (61) is provided with a mounting steel bar (612). The upper pressure-bearing cylinder (62) is provided with a The second center hole (622) is connected to the first center hole (611) and the second center hole (622). The upper pressure-bearing cylinder (62) is provided with a grouting hole (621), and the grouting hole (621) is connected to the first center hole (611). The upper end surface of the upper pressure-bearing cylinder (62) is provided with an anchor installation position (623). The working anchor (7) is set at the anchor installation position (623). An anchor cable clamp ring (71) is embedded in the working anchor (7), and the upper end of the anchor cable (81) is clamped by the anchor cable clamp ring (71).

2. A novel anti-floating anchor rod according to claim 1, characterized in that: The bottom anchoring portion (1) comprises: a guide bracket (21) and a bearing plate (3); the guide bracket (21) is connected to the bearing plate (3); the lower end of the anchor cable (81) is connected to the bearing plate (3); and a guide cone cap (22) is provided at the lower end of the guide bracket (21).

3. The novel anti-floating anchor rod according to claim 2, characterized in that: The bearing plate (3) is provided with: a guide bracket mounting hole (31), an anchor cable hole (32), and a grouting pipe hole (33); the guide bracket (21) is connected to the guide bracket mounting hole (31); a sealing locking nut (42) is sleeved in the anchor cable hole (32); a waterproof rubber ring is provided inside the sealing locking nut (42); the anchor cable (81) passes through the sealing locking nut (42) and is connected to the extrusion sleeve (43); an extrusion spring is provided inside the extrusion sleeve (43); and the grouting pipe hole (33) is passed through by the grouting pipe.

4. The novel anti-floating anchor rod according to claim 3 is characterized in that: The anchor cable (81), the sealing lock nut (42) and the extrusion sleeve (43) located on the lower end surface of the bearing plate (3) are sealed by the sealing tube (41) and the lower end surface of the bearing plate (3), and the extrusion sleeve (43) is filled with an anti-corrosion medium (44).

5. The novel anti-floating anchor rod according to claim 4, characterized in that: The anchor cable (81) is sheathed by a water-swellable rubber ring (83), which is arranged in the second center hole (622) and below the grouting outlet of the grouting hole (621).

6. The novel anti-floating anchor rod according to claim 5, characterized in that: An isolation bracket (82) is provided at a position of the anchor cable (81) between the bottom anchor portion (1) and the top anchor portion (5).

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