Recyclable anti-floating anchor rod device and construction technology thereof

Abstract

The invention discloses a recoverable anti-floating anchor rod device and a construction technology thereof, and relates to the technical field of anti-floating of constructional engineering, the recoverable anti-floating anchor rod device comprises an anchor rod, a plurality of anchoring assemblies, a plurality of positioning supports, a heat conduction wire and a grouting pipe, the anchoring assemblies are arranged on the anchor rod at equal intervals, the positioning supports are arranged on the circumference of the outer wall of each anchoring assembly, and the heat conduction wire is arranged on the anchor rod. A plurality of reinforcing ribs are arranged between the positioning support and the anchoring assembly, the reinforcing ribs are arranged in a triangular shape, at least two grouting holes are formed in the anchoring assembly, grouting pipes are installed in the grouting holes, the number of the grouting pipes is two, and the grouting pipes are arranged in the grouting holes in a sliding mode. According to the device, the bonding effect between the device and a soil body can be enhanced through the anchoring assembly and the positioning support, so that the anti-pulling performance of the device is improved, the anchor rod is detachably clamped through the anchoring assembly, and recovery of the anchor rod is facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of anti-floating of construction engineering, in particular to a recoverable anti-floating anchor rod device and a construction process thereof. Background Art

[0002] Anti-floating anchor rods are a kind of anti-floating measures for underground structures in construction projects. Anti-floating anchor rods refer to structural components set up to resist the upward displacement of buildings above them. They are related to the height and changes of groundwater levels. They are opposite to the force direction of compression piles. Railway foundation anti-floating anchor rods are an important construction method used in railway projects to control and limit foundation settlement. Especially under geological conditions where the groundwater level is high and the soil is easy to flow and shift horizontally, their role is particularly significant.

[0003] Existing anti-floating anchor rods are divided into recyclable and non-recyclable ones. The non-recyclable anti-floating anchor rods are anchored by welding multiple positioning brackets at equal distances on the anchor rods, but the structural strength of the positioning brackets is poor and the anchor rods are non-recyclable. The recyclable anti-floating anchor rods are installed with multiple positioning brackets at equal distances on the anchor rods. The positioning brackets are made of hot-melt materials, but the bonding effect with the soil is poor, resulting in a small pull-out resistance of the anchor rods. When recovering, the anchor rods are detached from the positioning brackets by electrically melting the anchor rods. The thermal conductivity of the anchor rods is poor, and the detachment effect becomes worse as the length of the anchor rods increases.

[0004] In view of the above problems, the present invention provides a recoverable anti-floating anchor device to solve the above problems. Summary of the invention

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a recyclable anti-floating anchor device, comprising an anchor, an anchor assembly, a positioning bracket, a heat conductor and a grouting pipe, wherein the anchor assembly is configured into multiple, equidistantly arranged on the anchor, a plurality of positioning brackets are arranged on the circumference of the outer wall of the anchor assembly, a plurality of reinforcing ribs are arranged between the positioning bracket and the anchor assembly, and the plurality of reinforcing ribs are arranged in a triangular shape, at least two grouting holes are opened on the anchor assembly, a grouting pipe is installed in the grouting hole, and the grouting pipe is configured into two, which are slidably arranged in the plurality of grouting holes.

[0006] Further, preferably, the two grouting pipes are respectively a normal pressure grouting pipe and a high pressure grouting pipe.

[0007] Further, preferably, the anchoring assembly includes an anchor head, an anti-pullout plate, a sealing sleeve and a clamping assembly, wherein the anti-pullout plate is configured in two and symmetrically fixed at both ends of the anchor head; a sealing sleeve is fixed in each of the two anti-pullout plates, and the sealing sleeve is sealingly connected to the anchor rod; and the clamping assemblies are at least three and circumferentially arranged on the anchor head.

[0008] Further, preferably, a sealing ring is fixed to the inner wall of the sealing sleeve, the thickness of the sealing ring is smaller than the thickness of the sealing sleeve, and the sealing ring is made of an easily breakable material.

[0009] Further, preferably, the clamping assembly includes a reinforcement plate, which is configured as two and symmetrically fixed on the outer wall of the anchor head, the axial position of the reinforcement plate is threadedly connected with a clamping screw, a heat-conducting sleeve is fixed in the anchor head at a position corresponding to the reinforcement plate, a hot melt column is slidably arranged in the heat-conducting sleeve near one end of the clamping screw, the hot melt column is in contact with the clamping screw, and the end of the hot melt column away from the clamping screw is connected to one end of a pressing spring, the other end of the pressing spring is connected to a sliding column, the sliding column is slidably arranged in the heat-conducting sleeve, the end of the sliding column away from the pressing spring is spherically hinged with a hinge column, and the ends of the two hinge columns away from the sliding column are jointly fixed with a clamping plate.

[0010] Further, preferably, the heat-conductive sleeve is made of a heat-conductive material, and is connected to the heat-conductive wire.

[0011] Further, preferably, the screwing distance of the clamping screw in the upper reinforcement plate is greater than that of the clamping screw in the lower reinforcement plate.

[0012] Further, preferably, the hot melt column is made of hot melt material and has a hollow structure inside.

[0013] A construction process for a recoverable anti-floating anchor device comprises the following steps:

[0014] S1. Anchor assembly installation: multiple anchor assemblies are equidistantly sleeved on the anchor rod, and the sealing sleeve and the anchor rod are sealed;

[0015] S2. Clamping force adjustment, the clamping screws in the multiple clamping assemblies are screwed in the direction of the anchor rod until the preset clamping force is reached, and then the clamping screws located at the top of the multiple clamping assemblies are screwed in further so that the clamping force is greater than that of the clamping screws located at the bottom;

[0016] S3. Anchor bolt installation: the anchor bolt with the anchor assembly installed is placed vertically into the drill hole through the tower crane, and grouting is performed once through the normal pressure grouting pipe. After the grouting is completed, the slurry is initially solidified, and then the secondary grouting is performed through the high pressure grouting pipe to further discharge the internal air of the primary grouting. When the slurry is completely solidified, the installation is completed by the prestressing tensioning equipment;

[0017] S4. Anchor rod recovery: The heat-conducting sleeve is heated by the heat-conducting wire, and the heat-conducting sleeve causes the hot melt column to melt and collapse. At this time, the spring is pressed to unload the force, so that the clamping plate is separated from the clamping state of the anchor rod. Then, a tensile force is applied to the anchor rod through an external device. At this time, the sealing ring is broken by the tensile force, and the anchor rod is recovered.

[0018] Compared with the prior art, the present invention provides a recoverable anti-floating anchor device, which has the following beneficial effects:

[0019] In the present invention, a double anchoring effect can be provided by the anchoring assembly and the positioning bracket, thereby strengthening the bonding effect with the soil and improving the pull-out resistance of the device, and the anchor rod is detachably clamped by the anchoring assembly, which is convenient for the recovery of the anchor rod. When recovering the anchor rod, the heat-conducting sleeve is first heated by the heat-conducting wire, and the heat-conducting sleeve causes the hot melt column to melt and collapse due to the heat. At this time, the spring is pressed to unload the force, so that the clamping plate is separated from the clamping state of the anchor rod, and then a tensile force is applied to the anchor rod by an external device. At this time, the sealing ring is broken by the tensile force, which is convenient for the recovery of the anchor rod. When clamping the anchor rod, the clamping force of the upper clamping screw is greater than the clamping force of the lower clamping screw, which can generate a downward component force on the anchor rod during clamping, thereby improving the pull-out resistance of the anchor rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of a recoverable anti-floating anchor device;

[0021] Figure 2 It is a cross-sectional schematic diagram of the structure of an anchor assembly of a recoverable anti-floating anchor device;

[0022] Figure 3 It is a schematic diagram of the enlarged structure of position A of a recoverable anti-floating anchor device;

[0023] Figure 4 A schematic diagram of a construction method of a recoverable anti-floating anchor device;

[0024] In the figure: 1. Anchor rod; 2. Anchor assembly; 3. Positioning bracket; 31. Reinforcement rib; 4. Heat conductive wire; 21. Grouting hole; 22. Anchor head; 23. Anti-pullout plate; 24. Sealing sleeve; 25. Clamping assembly; 251. Reinforcement plate; 252. Heat conductive sleeve; 253. Hot melt column; 254. Press spring; 255. Sliding column; 256. Articulated column; 257. Clamping plate. DETAILED DESCRIPTION

[0025] Reference Figure 1-Figure 4The present invention provides a technical solution: a recyclable anti-floating anchor device, comprising an anchor 1, an anchor assembly 2, a positioning bracket 3, a heat conductor 4 and a grouting pipe, wherein the anchor assembly 2 is configured as a plurality of positioning brackets 3 arranged equidistantly on the anchor 1, a plurality of positioning brackets 3 are arranged circumferentially on the outer wall of the anchor assembly 2, a plurality of reinforcing ribs 31 are arranged between the positioning bracket 3 and the anchor assembly 2, and the plurality of reinforcing ribs 31 are arranged in a triangular shape, at least two grouting holes 21 are opened on the anchor assembly 2, a grouting pipe is installed in the grouting hole 21, and the grouting pipe is configured as two and slidably arranged in the plurality of grouting holes 21.

[0026] Among them, by providing a plurality of reinforcing ribs 31 arranged in a triangular shape between the positioning bracket 3 and the anchoring assembly 2, the strength of the positioning bracket 3 can be greatly improved, thereby improving the anchoring effect.

[0027] In this embodiment, the two grouting pipes are respectively a normal pressure grouting pipe and a high pressure grouting pipe.

[0028] That is to say, when grouting operation is carried out, grouting is first carried out through the normal pressure grouting pipe. After the grouting is completed, the slurry is initially solidified, and then a second grouting is carried out through the high-pressure grouting pipe to further discharge the internal air of the first grouting. When the slurry is completely solidified, prestressing force is provided by the prestressing tensioning equipment.

[0029] As a preferred embodiment, the anchoring assembly 2 includes an anchor head 22, an anti-pullout plate 23, a sealing sleeve 24 and a clamping assembly 25, wherein the anti-pullout plate 23 is configured as two and symmetrically fixed at both ends of the anchor head 22; a sealing sleeve 24 is fixed in each of the two anti-pullout plates 23, and the sealing sleeve 24 is sealed and connected to the anchor rod 1; and the clamping assemblies 25 are at least three and are circumferentially arranged on the anchor head 22.

[0030] As a preferred embodiment, a sealing ring is fixed to the inner wall of the sealing sleeve 24 , the thickness of the sealing ring is smaller than the thickness of the sealing sleeve 24 , and the sealing ring is made of an easily breakable material.

[0031] That is to say, when a pulling force is applied to the anchor rod 1 by an external device, the pulling force breaks the sealing ring and causes the sealing sleeve 24 to separate from the anchor rod 1. When the clamping assembly 25 clamps the anchor rod 1, the anchor rod 1 and the sealing sleeve 24 are in a relatively static state, and the sealing sleeve 24 is in a stress-free state.

[0032] As a preferred embodiment, the clamping assembly 25 includes a reinforcement plate 251, which is configured as two and symmetrically fixed on the outer wall of the anchor head 22. The axial position of the reinforcement plate 251 is threadedly connected with a clamping screw, and a heat-conducting sleeve 252 is fixed in the anchor head 22 at a position corresponding to the reinforcement plate 251. A hot melt column 253 is slidably arranged in the heat-conducting sleeve 252 near one end of the clamping screw. The hot melt column 253 contacts the clamping screw, and the end of the hot melt column 253 away from the clamping screw is connected to one end of a pressing spring 254, and the other end of the pressing spring 254 is connected to a sliding column 255. The sliding column 255 is slidably arranged in the heat-conducting sleeve 252, and the end of the sliding column 255 away from the pressing spring 254 is spherically hinged with a hinge column 256, and the ends of the two hinge columns 256 away from the sliding column 255 are jointly fixed with a clamping plate 257.

[0033] As a preferred embodiment, the heat-conducting sleeve 252 is made of heat-conducting material and is connected to the heat-conducting wire 4 .

[0034] When the anchor rod 1 needs to be recovered, the heat-conducting sleeve 252 is first heated by the heat-conducting wire 4, and the heat-conducting sleeve 252 causes the hot melt column 253 to melt and collapse. At this time, the spring 254 is pressed to release the force, so that the clamping plate 257 is released from the clamping state of the anchor rod 1.

[0035] As a preferred embodiment, the screwing distance of the clamping screw in the upper reinforcement plate 251 is greater than that of the clamping screw in the lower reinforcement plate 251.

[0036] When the anchor rod 1 is clamped, the clamping force of the upper clamping screw is greater than the clamping force of the lower clamping screw, which can generate a downward component force on the anchor rod 1 during clamping, so that the clamping force provides an additional downward pressure, thereby improving the pull-out resistance of the anchor rod.

[0037] As a preferred embodiment, the hot melt column 253 is made of hot melt material and has a hollow structure inside.

[0038] That is to say, by setting the heat-melting column 253 as a hollow structure, it can collapse when it is melted by heat, thereby facilitating the unloading of the pressing spring 254.

[0039] A construction process for a recoverable anti-floating anchor device comprises the following steps:

[0040] S1. Anchor assembly 2 is installed, multiple anchor assemblies 2 are equidistantly sleeved on the anchor rod 1, and the sealing sleeve 24 and the anchor rod 1 are sealed;

[0041] It should be noted that the sealing can be done by using sealing materials such as sealant to prevent the slurry from entering the interior of the anchor assembly 2 during grouting and affecting the sliding of the clamping assembly 25;

[0042] S2. The clamping force is adjusted by screwing the clamping screws in the multiple clamping assemblies 25 in the direction of the anchor rod 1 until the preset clamping force is reached, and then the clamping screws in the multiple clamping assemblies 25 located at the top continue to be screwed in so that the clamping force is greater than the clamping screws located at the bottom;

[0043] By generating different clamping forces up and down, a downward force component can be generated on the anchor rod 1 during clamping, so that the clamping force provides an additional downward pressure, thereby improving the pull-out resistance of the anchor rod;

[0044] S3. Anchor rod 1 is installed. The anchor rod 1 with the anchor assembly 2 installed is placed vertically into the drill hole through the tower crane, and grouting is performed once through the normal pressure grouting pipe. After the grouting is completed, the slurry is initially solidified, and then a secondary grouting is performed through the high pressure grouting pipe to further discharge the internal air of the primary grouting. When the slurry is completely solidified, the installation is completed by the prestressing tensioning equipment;

[0045] S4. The anchor rod 1 is recovered. The heat-conducting sleeve 252 is heated by the heat-conducting wire 4. The heat-conducting sleeve 252 causes the hot melt column 253 to melt and collapse. At this time, the spring 254 is pressed to unload the force, so that the clamping plate 257 is released from the clamping state of the anchor rod 1. Then, a tensile force is applied to the anchor rod 1 through an external device. At this time, the sealing ring is broken by the tensile force, and the recovery of the anchor rod 1 is completed.

[0046] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A recyclable anti-floating anchor device, characterized in that: The invention comprises an anchor rod (1), an anchor assembly (2), a positioning bracket (3), a heat conducting wire (4) and a grouting pipe, wherein the anchor assembly (2) is configured as a plurality of positioning brackets (3) which are equidistantly arranged on the anchor rod (1), a plurality of positioning brackets (3) are arranged on the circumference of the outer wall of the anchor assembly (2), a plurality of reinforcing ribs (31) are arranged between the positioning brackets (3) and the anchor assembly (2), and the plurality of reinforcing ribs (31) are arranged in a triangular shape, and at least two grouting holes (21) are opened on the anchor assembly (2), and a grouting pipe is installed in each of the grouting holes (21), and the grouting pipe is configured as two and is slidably arranged in the plurality of grouting holes (21).

2. A recyclable anti-floating anchor device according to claim 1, characterized in that: The two grouting pipes are respectively a normal pressure grouting pipe and a high pressure grouting pipe.

3. A recyclable anti-floating anchor device according to claim 2, characterized in that: The anchoring assembly (2) comprises an anchor head (22), an anti-pullout plate (23), a sealing sleeve (24) and a clamping assembly (25), wherein the anti-pullout plate (23) is configured in two and symmetrically fixed at two ends of the anchor head (22); a sealing sleeve (24) is fixed in each of the two anti-pullout plates (23), and the sealing sleeve (24) is sealed and connected to the anchor rod (1); and the clamping assemblies (25) are at least three and are circumferentially arranged on the anchor head (22).

4. A recyclable anti-floating anchor device according to claim 3, characterized in that: A sealing ring is fixed to the inner wall of the sealing sleeve (24); the thickness of the sealing ring is smaller than the thickness of the sealing sleeve (24), and the sealing ring is made of an easily breakable material.

5. A recoverable anti-floating anchor device according to claim 4, characterized in that: The clamping assembly (25) comprises a reinforcement disk (251), wherein the reinforcement disk (251) is configured as two and symmetrically fixed on the outer wall of the anchor head (22), a clamping screw is threadedly connected at the axial position of the reinforcement disk (251), a heat-conducting sleeve (252) is fixed at a position corresponding to the reinforcement disk (251) in the anchor head (22), a hot melt column (253) is slidably arranged in the heat-conducting sleeve (252) near one end of the clamping screw, and the hot melt column (253) is in contact with the clamping screw. , and one end of the hot melt column (253) away from the clamping screw is connected to one end of a pressing spring (254), and the other end of the pressing spring (254) is connected to a sliding column (255), and the sliding column (255) is slidably arranged in the heat-conducting sleeve (252), and one end of the sliding column (255) away from the pressing spring (254) is spherically hinged with a hinge column (256), and one end of the two hinge columns (256) away from the sliding column (255) is commonly fixed with a clamping plate (257).

6. A recoverable anti-floating anchor device according to claim 5, characterized in that: The heat-conducting sleeve (252) is made of a heat-conducting material and is connected to the heat-conducting wire (4).

7. A recoverable anti-floating anchor device according to claim 6, characterized in that: The screwing distance of the clamping screw in the reinforcement plate (251) located at the top is greater than that of the clamping screw located at the bottom.

8. A retrievable anti-floating anchor device according to claim 7, characterized in that: The hot melt column (253) is made of hot melt material and has a hollow structure inside.

9. The construction process of a recoverable anti-floating anchor device according to claim 8 is characterized in that: The steps include: S1. Anchor assembly (2) is installed, multiple anchor assemblies (2) are equidistantly sleeved on the anchor rod (1), and the sealing sleeve (24) and the anchor rod (1) are sealed; S2. The clamping force is adjusted by screwing the clamping screws in the multiple clamping assemblies (25) toward the anchor rod (1) until the preset clamping force is reached, and then the clamping screws located at the top of the multiple clamping assemblies (25) are screwed in further so that the clamping force is greater than that of the clamping screws located at the bottom; S3. Anchor rod (1) installation: the anchor rod (1) with the anchor assembly (2) installed is placed vertically into the borehole through the tower crane, and grouting is performed once through the normal pressure grouting pipe. After the grouting is completed, the slurry is initially solidified, and then a secondary grouting is performed through the high pressure grouting pipe to further discharge the internal air of the primary grouting. When the slurry is completely solidified, the installation is completed by the prestressing tensioning equipment; S4. The anchor rod (1) is recovered, and the heat-conducting sleeve (252) is heated by the heat-conducting wire (4). The heat-conducting sleeve (252) causes the hot melt column (253) to melt and collapse. At this time, the spring (254) is pressed to release the force, so that the clamping plate (257) is separated from the clamping state of the anchor rod (1). Then, a tensile force is applied to the anchor rod (1) through an external device. At this time, the sealing ring is broken by the tensile force, and the recovery of the anchor rod (1) is completed.

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