Tensile expansion head pre-stressed anchor cable device

Abstract

The utility model relates to the technical field of constructional engineering equipment, in particular to a tensile expansion head pre-stressed anchor cable device which comprises a sleeve, a base plate, a top anchorage device and an end pipe, the top of the sleeve is connected with the bottom of the base plate, the top of the base plate is connected with the bottom of the top anchorage device, and the side wall of the sleeve is connected with the top of the end pipe through a flange mechanism. The bottom opening of the end pipe is arranged below the bottom of the sleeve, the bottom of the base plate is connected with the top of the metal bearing plate through a plurality of steel strands, the steel strands wrap the side wall of the sleeve, and the end pipe is connected to the side wall of the sleeve through a flange mechanism, so that the device has extremely high anti-pulling capacity. The steel strand connected between the flange mechanism and the base plate can increase the capacity of applying prestress to the device, the overall strength of the device is further greatly improved, and meanwhile the bearing capacity of the device is improved.

Description

Technical Field

[0001] This utility model relates to the field of building engineering equipment technology, and in particular to a tensile enlarged head prestressed anchor cable device. Background Technology

[0002] Anchor cables are reinforcement and support materials used in geotechnical engineering. They are mainly composed of high-strength steel strands or wire bundles and are fixed in the rock or soil mass using prestressing technology to enhance the stability and safety of the structure. Anchor cables are widely used in tunnels, bridges, slopes, foundation pits, dams, and other projects to resist external loads, control deformation, and prevent structural failure. After fabrication, anchor cables require prestressing to improve their structural strength and load-bearing capacity.

[0003] However, existing technologies still have shortcomings. For example, an anchor cable with patent number CN201720671877.2 has a temperature detection device on the grouting pipe, and also includes a first comparison device, a first reference device, a first control device, and a cooling device; it also includes a second comparison device, a second reference device, a second control device, and a heating device; when the temperature detection signal is greater than the first reference signal, the cooling device is activated, but the heating device is not activated; when the temperature detection signal is less than the second reference signal, the cooling device is not activated, but the heating device is activated. The main structure of this device is too simple, so when it is completed, it cannot apply greater prestress, which will lead to a serious decrease in the strength and load-bearing capacity of the device. Utility Model Content

[0004] The purpose of this invention is to provide a tensile enlarged head prestressed anchor cable device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a tensile-strengthened prestressed anchor cable device, comprising: a sleeve, a pad, a top anchor, and an end tube. The top of the sleeve is connected to the bottom of the pad, and the top of the pad is connected to the bottom of the top anchor. The side wall of the sleeve is connected to the top of the end tube via a flange mechanism. The bottom opening of the end tube is located below the bottom of the sleeve. The bottom of the pad is connected to the top of a metal pressure plate via multiple steel strands, and the steel strands are wrapped around the side wall of the sleeve.

[0006] Preferably, an expansion disc is connected to each of the two side walls of the end tube, the two expansion discs are arranged at an angle, and the bottom of the expansion discs are arranged on the same horizontal plane.

[0007] Preferably, the bottom of the sleeve is connected to the top of a metal bearing plate, and the bottom of the metal bearing plate is connected to the top of the bottom anchor.

[0008] Preferably, a high-pressure grouting pipe is connected to the pad and the top anchor. The top of the high-pressure grouting pipe is positioned above the top anchor and connected to the mud supply mechanism. The bottom of the high-pressure grouting pipe is connected to the top of a metal grouting pipe. The metal grouting pipe is connected to the metal bearing plate and the bottom anchor, and the bottom of the metal grouting pipe is positioned below the bottom anchor.

[0009] Preferably, the end pipe has multiple post-grouting outlet holes on its side wall, and the post-grouting outlet holes are located below the bottom of the metal grouting pipe.

[0010] Preferably, the high-pressure grouting pipe is made of rubber.

[0011] Preferably, both the metal bearing plate and the bottom anchor are coated with anti-corrosion material.

[0012] Preferably, the metal grouting pipe is coated with an epoxy coating.

[0013] Preferably, the end of the end tube is connected to the end of multiple conduits, the other end of the conduits is located away from the end tube, the end of each conduit is connected to a grout outlet hole after grouting, the inner wall of the conduit is connected to the bottom end of the installation tube, the installation plate inside the installation tube is slidably connected to the drive rod, the top of the drive rod is positioned above the top of the installation tube and connected to the bottom of the pressure plate, the bottom of the installation plate is connected to the top of the flow-limiting column through a spring, the flow-limiting column is slidably connected to the installation tube, and the bottom of the flow-limiting column is placed inside the conduit.

[0014] Preferably, a locking rod is slidably connected to the mounting tube. The end of the locking rod outside the mounting tube is connected to the end of the tension spring, and the other end of the tension spring is connected to the side wall of the mounting tube. The top surface of the other end of the locking rod inside the mounting tube is chamfered. The side wall of the drive rod has multiple locking grooves longitudinally. The top wall of each locking groove is chamfered twice. Chamfered twice slides in cooperation with the chamfer. The bottom wall of the locking groove contacts the bottom of the other end of the locking rod.

[0015] The beneficial effects of this utility model are as follows:

[0016] The end pipe is connected to the side wall of the sleeve by a flange mechanism, so the device has extremely strong pull-out resistance. The steel strands connecting the metal bearing plate and the pad can increase the device's ability to be prestressed, further greatly improving the overall strength of the device and its load-bearing capacity. Attached Figure Description

[0017] Figure 1 This is a cross-sectional view of the main structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the catheter structure of this utility model;

[0019] Figure 3This is a cross-sectional view of the catheter of this utility model;

[0020] Figure 4 This is a schematic diagram showing the installation position of the locking rod of this utility model.

[0021] In the diagram: 1. Sleeve; 2. Pad; 3. Top anchor; 4. End pipe; 5. Expansion plate; 6. Metal bearing plate; 7. Bottom anchor; 8. High-pressure grouting pipe; 9. Metal grouting pipe; 10. Grout outlet hole; 11. Guide pipe; 12. Installation pipe; 13. Installation plate; 14. Drive rod; 15. Pressure plate; 16. Spring; 17. Flow limiting column; 18. Locking rod; 19. Tension spring; 20. Chamfer; 21. Locking groove; 22. Chamfer II. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] Example 1: Reference Figure 1-4 A tensile-strengthened prestressed anchor cable device includes: a sleeve 1, a pad 2, a top anchor 3, and an end tube 4. The top of the sleeve 1 is connected to the bottom of the pad 2, the top of the pad 2 is connected to the bottom of the top anchor 3, the side wall of the sleeve 1 is connected to the top of the end tube 4 through a flange mechanism, the bottom of the end tube 4 is located below the bottom of the sleeve 1, and the bottom of the pad 2 is connected to the top of a metal pressure plate 6 through multiple steel strands.

[0025] The principle behind the above scheme is as follows:

[0026] During the manufacturing of the device, the bottom of the pad 2 is connected to the top of the sleeve 1, the top of the pad 2 is connected to the top anchor 3, and the side wall of the sleeve 1 is connected to the top of the end pipe 4 through the flange mechanism in the prior art. Then, multiple steel strands are installed in the sleeve 1, and the two ends of the steel strands are connected to the pad 2 and the metal bearing plate 6 respectively. After the device is buried, prestress is applied to the steel strands.

[0027] The beneficial effects of the above scheme are as follows:

[0028] Because the end pipe 4 is connected to the side wall of the sleeve 1 by a flange mechanism, the device has extremely strong pull-out resistance. The steel strands connected between the metal bearing plate 6 and the pad plate 2 can increase the device's ability to be prestressed, further greatly improving the overall strength of the device and also increasing its load-bearing capacity.

[0029] The pad 2 not only seals the top of the sleeve 1, but also distributes the pressure of the device evenly on the ground to prevent the device from damaging the ground. In addition, the pad 2 can also ensure that the device is perpendicular to the ground and prevent the sleeve 1 from tilting.

[0030] Example 2: Reference Figure 1-4 An expansion disk 5 is connected to each of the two side walls of the end tube 4. The two expansion disks 5 are set at an angle to each other, and the bottom of the expansion disks 5 are set on the same horizontal plane.

[0031] The principles and beneficial effects of the above scheme are as follows:

[0032] The expansion disc 5 connected to the side wall of the end tube 4 increases the cross-sectional area of ​​the end tube 4, further increasing the pull-out resistance of the device. Since the two expansion discs 5 are set at an angle, the end tube 4 can better integrate with the soil in the stratum, and the device can be suitable for burial in strata with different geological conditions.

[0033] Example 3: Reference Figure 1-4 The bottom of the sleeve 1 is connected to the top of the metal pressure plate 6, and the bottom of the metal pressure plate 6 is connected to the top of the bottom anchor 7.

[0034] The principles and beneficial effects of the above scheme are as follows:

[0035] The top of the metal bearing plate 6 is connected to the bottom of the sleeve 1, which can not only seal the bottom of the sleeve 1, but also withstand the pressure from the stratum. The bottom anchor 7 connected to the bottom of the metal bearing plate 6 has the same structure as the top anchor 3, specifically the KM15-1860 type anchor in the prior art. The bottom anchor 7 and the top anchor 3 work together to improve the overall anchoring effect of the device.

[0036] Example 4: Reference Figure 1-4A high-pressure grouting pipe 8 is connected to the pad 2 and the top anchor 3. The top of the high-pressure grouting pipe 8 is positioned above the top anchor 3 and connected to the mud supply mechanism. The bottom of the high-pressure grouting pipe 8 is connected to the top of the metal grouting pipe 9. The metal grouting pipe 9 is connected to the metal bearing plate 6 and the bottom anchor 7. The bottom of the metal grouting pipe 9 is positioned below the bottom anchor 7.

[0037] The principles and beneficial effects of the above scheme are as follows:

[0038] After the device is buried in the stratum, the mud supply mechanism is activated to supply mud to the high-pressure grouting pipe 8. The mud is injected into the end pipe 4 through the metal grouting pipe 9. The mud supply mechanism is specifically composed of a mud storage tank and a grouting pump. The output end of the grouting pump supplies mud to the high-pressure grouting pipe 8. The specific model of the grouting pump is BW50-3.

[0039] Example 5: Reference Figure 1-4 The end pipe 4 has multiple grout outlet holes 10 on its side wall, and the grout outlet holes 10 are located below the bottom of the metal grouting pipe 9.

[0040] The principles and beneficial effects of the above scheme are as follows:

[0041] After the mud enters the end pipe 4, it enters the formation on the side of the end pipe 4 through the grout outlet 10, which improves the uniformity of mud injection, further improves the solidification effect between the mud and the formation and the equipment, and improves the stability of the equipment.

[0042] Example 6: Reference Figure 1-4 The high-pressure grouting pipe 8 is made of rubber.

[0043] The principles and beneficial effects of the above scheme are as follows:

[0044] The high-pressure grouting pipe 8 is made of rubber, which can withstand high pressure and facilitates connection and sealing with the metal grouting pipe 9, ensuring the safety of the device during grouting. At the same time, the rubber high-pressure grouting pipe 8 can absorb the vibration generated by the flow of mud during grouting, which can not only reduce noise, but also protect the casing 1 and the grouting equipment.

[0045] Example 7: Reference Figure 1-4 Both the metal pressure plate 6 and the bottom anchor 7 are coated with anti-corrosion material.

[0046] The principles and beneficial effects of the above scheme are as follows:

[0047] The anti-corrosion material is applied to the metal bearing plate 6 and the bottom anchor 7 to prevent acidic or alkaline substances in the stratum from damaging them, thereby improving the service life and safety of the device. The anti-corrosion material can be rust-proof paint, epoxy resin coating or anodic protection coating, etc., as in the prior art.

[0048] Example 8: Reference Figure 1-4 The metal grouting pipe 9 is coated with an epoxy coating.

[0049] The principles and beneficial effects of the above scheme are as follows:

[0050] Applying an epoxy coating to the metal grouting pipe 9 can prevent corrosion of the metal grouting pipe 9 and increase the flow effect of the grout during injection.

[0051] Example 9: Reference Figure 1-4 The end of the end tube 4 is connected to the end of a plurality of conduits 11. The other end of the conduits 11 is located away from the end tube 4. The end of each conduit 11 is connected to a post-grouting outlet hole 10. The bottom end of the installation tube 12 is connected to the inner wall of the conduit 11. The installation plate 13 inside the installation tube 12 is slidably connected to the drive rod 14. The top of the drive rod 14 is positioned above the top of the installation tube 12 and is connected to the bottom of the pressure plate 15. The bottom of the installation plate 13 is connected to the top of the flow-limiting column 17 through a spring 16. The flow-limiting column 17 is slidably connected to the installation tube 12. The bottom of the flow-limiting column 17 is placed inside the conduit 11.

[0052] The principles and beneficial effects of the above scheme are as follows:

[0053] Different geological formations have different pressures. When the formation pressure is high, the pressure exerted on the pressure plate 15 is also high. The pressure plate 15 drives the drive rod 14 and the flow-limiting column 17 to move downward a greater distance, and the length of the spring 16 becomes longer. Since the bottom of the flow-limiting column 17 is placed inside the conduit 11, the descending flow-limiting column 17 increases the obstruction effect on the mud flowing inside the conduit 11, further increasing the pressure of the mud output from the other end of the conduit 11, i.e., the output end of the conduit 11, so as to avoid the mud injection range in the formation being too small, which would reduce the consolidation effect of the device in the formation.

[0054] When the pressure of the formation is low, the pressure plate 15 receives less pressure from the formation, the pressure plate 15 drives the drive rod 14 and the flow-limiting column 17 to move downward a small distance, the length of the spring 16 increases less, the flow-limiting column 17 reduces the obstruction effect on the mud in the conduit 11, the pressure of the mud output from the output end of the conduit 11 decreases, and the phenomenon of formation collapse caused by the impact of mud on the formation is prevented.

[0055] The flow-limiting column 17 can break up the solids present in the mud inside the conduit 11, preventing the conduit 11 from being blocked due to excessive solids.

[0056] Example 10: Reference Figure 1-4 A locking rod 18 is slidably connected to the mounting tube 12. The end of the locking rod 18 outside the mounting tube 12 is connected to the end of the tension spring 19. The other end of the tension spring 19 is connected to the side wall of the mounting tube 12. The top surface of the other end of the locking rod 18 inside the mounting tube 12 is provided with a chamfer 20. The side wall of the drive rod 14 has a plurality of locking grooves 21 longitudinally opened. The top wall of each locking groove 21 is provided with a chamfer 22. The chamfer 22 and the chamfer 20 are slidably engaged. The bottom wall of the locking groove 21 is in contact with the bottom of the other end of the locking rod 18.

[0057] The principles and beneficial effects of the above scheme are as follows:

[0058] After the pressure plate 15 drives the drive rod 14 to move downward, the chamfer 22 and chamfer 20 in the locking groove 21 slide together, the locking rod 18 moves away from the installation pipe 12, and the length of the tension spring 19 increases. When the other end of the locking rod 18 is inserted into another locking groove 21, the reset of the tension spring 19 drives the reset of the locking rod 18. The bottom of the other end of the locking rod 18 engages with the bottom wall of the locking groove 21, thus finally locking the flow-limiting column 17 and preventing changes in the mud output pressure at the output end of the conduit 11 due to the collapse of the strata near the pressure plate 15 or the accidental vibration of the device.

[0059] Since the casing 1 can be installed in the formation by pre-drilling and then burying, or by connecting to the output end of the drilling rig and drilling at a predetermined position on the ground, it can be seen that the end of the locking rod 18 connected to the tension spring 19 is set in the same direction as the rotation of the drilling rig. At this time, not only can the formation be damaged by the expansion plate 5 to achieve the purpose of drilling, but it can also prevent the locking rod 18 from being accidentally moved during the drilling process, which would cause the pressure plate 15 to be misaligned, thus preventing the device from becoming unusable after being buried underground.

[0060] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this invention, and no reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A tensile-strengthened prestressed anchor cable device, characterized in that, include: The sleeve (1), pad (2), top anchor (3) and end pipe (4) are provided. The top of the sleeve (1) is connected to the bottom of the pad (2), the top of the pad (2) is connected to the bottom of the top anchor (3), the side wall of the sleeve (1) is connected to the top of the end pipe (4) through a flange mechanism, the bottom opening of the end pipe (4) is located below the bottom of the sleeve (1), and the bottom of the pad (2) is connected to the top of the metal pressure plate (6) through multiple steel strands. The steel strands are wrapped around the side wall of the sleeve (1).

2. The tensile enlarged head prestressed anchor cable device according to claim 1, characterized in that, An expansion disk (5) is connected to each of the two side walls of the end tube (4). The two expansion disks (5) are set at an angle to each other, and the bottom of the expansion disks (5) are set on the same horizontal plane.

3. The tensile enlarged head prestressed anchor cable device according to claim 1, characterized in that, The bottom of the sleeve (1) is connected to the top of the metal bearing plate (6), and the bottom of the metal bearing plate (6) is connected to the top of the bottom anchor (7).

4. The tensile enlarged head prestressed anchor cable device according to claim 3, characterized in that, A high-pressure grouting pipe (8) is connected to the pad (2) and the top anchor (3). The top of the high-pressure grouting pipe (8) is placed above the top anchor (3) and connected to the mud supply mechanism. The bottom of the high-pressure grouting pipe (8) is connected to the top of the metal grouting pipe (9). The metal grouting pipe (9) is connected to the metal bearing plate (6) and the bottom anchor (7). The bottom of the metal grouting pipe (9) is placed below the bottom anchor (7).

5. The tensile-strengthened prestressed anchor cable device according to claim 4, characterized in that, The end pipe (4) has multiple grout outlet holes (10) on its side wall, which are located below the bottom of the metal grouting pipe (9).

6. The tensile enlarged head prestressed anchor cable device according to claim 5, characterized in that, The high-pressure grouting pipe (8) is made of rubber.

7. The tensile enlarged head prestressed anchor cable device according to claim 4, characterized in that, Both the metal bearing plate (6) and the bottom anchor (7) are coated with anti-corrosion material.

8. A tensile-strengthened prestressed anchor cable device according to claim 6, characterized in that, The metal grouting pipe (9) is coated with an epoxy coating.

9. A tensile-strengthened prestressed anchor cable device according to claim 5, characterized in that, The end of the end tube (4) is connected to the end of a plurality of conduits (11). The other end of the conduits (11) is set away from the end tube (4). The end of each conduit (11) is connected to a grout outlet (10) after grouting. The bottom end of the installation tube (12) is connected to the inner wall of the conduit (11). The installation plate (13) inside the installation tube (12) is slidably connected to the drive rod (14). The top of the drive rod (14) is placed above the top of the installation tube (12) and connected to the bottom of the pressure plate (15). The bottom of the installation plate (13) is connected to the top of the flow-limiting column (17) through a spring (16). The flow-limiting column (17) is slidably connected to the installation tube (12). The bottom of the flow-limiting column (17) is placed inside the conduit (11).

10. A tensile-strengthened prestressed anchor cable device according to claim 9, characterized in that, A locking rod (18) is slidably connected to the mounting tube (12). The end of the locking rod (18) outside the mounting tube (12) is connected to the end of the tension spring (19). The other end of the tension spring (19) is connected to the side wall of the mounting tube (12). The top surface of the other end of the locking rod (18) inside the mounting tube (12) is provided with a chamfer (20). The side wall of the drive rod (14) has multiple locking grooves (21) longitudinally. The top wall of each locking groove (21) is provided with a second chamfer (22). The second chamfer (22) and the chamfer (20) are slidably engaged. The bottom wall of the locking groove (21) is in contact with the bottom of the other end of the locking rod (18).

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