Double-channel hollow grouting anchor cable

Abstract

The application provides a double-channel hollow grouting anchor cable, which comprises an anchor cable body, a grouting assembly and an anchoring assembly, the anchor cable body is a hollow structure, the grouting assembly comprises a grouting pipe located in the hollow structure of the anchor cable body, the anchoring assembly comprises an anchoring pipe located in the hollow structure of the anchor cable body, the grouting pipe and the anchoring pipe both extend along the axial direction of the anchor cable body, the grouting pipe is located outside the anchoring pipe and the grouting pipe and the anchoring pipe are arranged separately, and the end of the anchoring pipe, which is inserted into a borehole, extends outward relative to the anchor cable body. The double-channel hollow grouting anchor cable provided by the application can provide anchoring and grouting functions and can help to provide higher initial anchoring force.

Description

Technical Field

[0001] This invention relates to the field of tunnel support technology, and in particular to a dual-channel hollow grouting anchor cable. Background Technology

[0002] Hollow grouting anchors are commonly used in roadway support, modifying and reinforcing roadway walls to improve support strength. Anchoring the hollow grouting anchors at corresponding positions in the roadway wall provides an initial anchoring force, facilitating the application of high prestress for grouting operations. However, current techniques require a mixing-and-advance method for anchoring, which limits anchoring length and results in a lower initial anchoring force, impacting the application of high prestress before grouting. High prestress is crucial for overall support effectiveness; without sufficient prestress, even high-pressure grouting will have limited impact on overall roadway support. Summary of the Invention

[0003] This invention is based on the inventor's discoveries and understanding of the following facts and problems:

[0004] The present invention aims to at least partially solve one of the technical problems in the related art.

[0005] Therefore, embodiments of the present invention propose a dual-channel hollow grouting anchor cable, which combines anchoring and grouting functions and can provide a high initial anchoring force.

[0006] The dual-channel hollow grouting anchor cable provided according to an embodiment of the present invention includes an anchor cable body, a grouting assembly, and an anchoring assembly. The anchor cable body is a hollow structure. The grouting assembly includes a grouting pipe located within the hollow structure of the anchor cable body. The anchoring assembly includes an anchoring pipe located within the hollow structure of the anchor cable body. Both the grouting pipe and the anchoring pipe extend along the axial direction of the anchor cable body. The grouting pipe is located outside the anchoring pipe, and the grouting pipe and the anchoring pipe are separately arranged. One end of the anchoring pipe that is inserted into the borehole relative to the anchor cable body extends outward relative to the anchor cable body.

[0007] The dual-channel hollow grouting anchor cable of this invention forms two independent spaces within the anchor cable body by separately setting the grouting pipe and the anchoring pipe inside the anchor cable body. These spaces can be used for anchoring and grouting operations respectively, so that the grouting anchor cable can take into account the anchoring function without affecting its original grouting function, and at the same time, it can effectively improve the initial anchoring force of the grouting anchor cable.

[0008] In some embodiments, the grouting pipe is sleeved outside the anchoring pipe, a grouting channel is formed between the grouting pipe and the anchoring pipe, and a pumping channel is formed inside the anchoring pipe.

[0009] In some embodiments, the anchoring assembly further includes an anchoring sleeve located at one end of the anchor cable body for insertion into the borehole, and the anchoring tube extends through the anchoring sleeve.

[0010] In some embodiments, the anchoring assembly further includes an anchoring nozzle for injecting anchoring agent, one axial end of the anchoring nozzle forming a first stepped shaft that can be inserted into the anchoring tube.

[0011] In some embodiments, the anchoring nozzle is further axially formed with a second stepped shaft that can be inserted into the grouting pipe, the second stepped shaft being arranged adjacent to the first stepped shaft; and / or, a sealing ring is provided at the junction of the first stepped shaft and the end of the anchoring pipe, the sealing ring abutting against the anchoring pipe when the anchoring nozzle is inserted into the anchoring pipe and squeezes the anchoring pipe.

[0012] In some embodiments, the grouting assembly further includes a grouting birdcage sleeved on the outside of the grouting pipe, wherein there are at least two grouting birdcages and all of the grouting birdcages are arranged sequentially along the axial direction of the grouting pipe, and grout outlet holes are provided on the side walls of the grouting pipe and the grouting birdcages that are in contact with each other, and at least one grout outlet hole on the grouting pipe is arranged opposite to at least one grout outlet hole on the grouting birdcage.

[0013] In some embodiments, the grouting pipe and the grouting birdcage are provided with grout outlet holes on both sides, and the number of grout outlet holes on either side is at least two.

[0014] In some embodiments, the grouting assembly further includes a grouting connector, at least a portion of the sidewall of the end face of the grouting connector being an annular conical surface. When the grouting connector is inserted into the grouting pipe, the annular conical surface can contact, compress, and seal the grouting pipe.

[0015] In some embodiments, the anchor cable body is further provided with a grout-stopping assembly, the grout-stopping assembly including a sealing sleeve sleeved on the anchor cable body, the sealing sleeve having a force that firmly connects the anchor cable body to the borehole.

[0016] In some embodiments, the grout-stopping assembly further includes a grout-stopping sleeve and a pusher tube, wherein the grout-stopping sleeve and the pusher tube are located on opposite axial sides of the sealing sleeve, the grout-stopping sleeve is fixed to the anchor cable body, and the pusher tube can move along the axial direction of the anchor cable body and squeeze the sealing sleeve. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a partial cross-sectional structural diagram of the dual-channel hollow grouting anchor cable according to an embodiment of the present invention;

[0019] Figure 2 yes Figure 1 A schematic diagram of the AA-direction cross section;

[0020] Figure 3 This is a schematic diagram of the fit between the anchoring sleeve and the anchor cable body in the dual-channel hollow grouting anchor cable of this invention embodiment;

[0021] Figure 4 This is a schematic diagram of the fit between the anchoring pipe and the anchoring nozzle in the dual-channel hollow grouting anchor cable of this invention.

[0022] Figure 5 This is a schematic diagram of the cooperation between the grouting pipe and the grouting birdcage in the dual-channel hollow grouting anchor cable of this invention embodiment;

[0023] Figure 6 This is a schematic diagram illustrating the fit between the grouting pipe and the grouting connector in the dual-channel hollow grouting anchor cable according to an embodiment of the present invention;

[0024] Figure 7 This is a schematic diagram of the cooperation between the grouting pipe and the grouting stop assembly in the dual-channel hollow grouting anchor cable of this invention.

[0025] Figure 8 This is a schematic diagram of the pumping system that works in conjunction with the dual-channel hollow grouting anchor cable of this invention.

[0026] In the picture:

[0027] 1. Anchor cable body;

[0028] 2. Grouting assembly; 21. Grouting pipe; 22. Grouting cage; 23. Grout outlet; 24. Grouting connector; 241. Annular conical surface; 25. Grout stop assembly; 251. Sealing sleeve; 252. Grout stop sleeve; 253. Pushing pipe;

[0029] 3. Anchoring assembly; 31. Anchoring pipe; 32. Anchoring sleeve; 33. Anchoring nozzle; 331. First step shaft; 332. Second step shaft; 34. Sealing ring;

[0030] 4. Pallet;

[0031] 5. Locks;

[0032] 6. Driving components; 61. Driving cylinder; 62. Driving piston rod; 63. Reversing valve;

[0033] 7. Discharge component; 71. Material box; 72. Material cylinder; 73. Discharge piston rod;

[0034] 8. Mixed parts. Detailed Implementation

[0035] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0036] The following is combined with Figures 1-8 A dual-channel hollow grouting anchor cable according to an embodiment of the present invention is described.

[0037] The dual-channel hollow grouting anchor cable provided in this embodiment of the invention, such as... Figure 1 As shown, the dual-channel hollow grouting anchor cable includes an anchor cable body 1, a grouting assembly 2, and an anchoring assembly 3. The anchor cable body 1 has a hollow structure. The grouting assembly 2 includes a grouting pipe 21, and the anchoring assembly 3 includes an anchoring pipe 31. The grouting pipe 21 and the anchoring pipe 31 are separate structures, both located within the hollow structure of the anchor cable body 1 and extending along the axial direction of the anchor cable body 1. The grouting pipe 21 is located radially outside the anchoring pipe 31, and the end of the anchoring pipe 31 that faces the anchor cable body 1 and is inserted into the borehole extends outward relative to the anchor cable body 1.

[0038] The grouting pipe 21 and the anchoring pipe 31 mentioned above are independent tubular structures.

[0039] When using this dual-channel hollow grouting anchor cable for anchoring operations, it is only necessary to place it into the prepared borehole and inject anchoring agent into the borehole through the anchoring pipe 31; when using this dual-channel hollow grouting anchor cable for grouting operations, it is only necessary to inject grout through the grouting pipe 21. Compared with the mixing and propulsion anchoring process in related technologies, the anchoring process used by this dual-channel hollow grouting anchor cable not only realizes the "anchor first, then grout" construction process of the anchor cable, but also achieves a new anchoring method through the anchoring component 3 without affecting the original high-pressure grouting function of the anchor cable. This anchoring method has the effect of adjusting the anchoring length and increasing the initial anchoring force of the grouting anchor cable. By applying this dual-channel hollow grouting anchor cable, the high-pressure anchoring process and grouting function can be combined, effectively improving the support strength of the roadway and solving the problem of easy deformation in soft and broken roadways.

[0040] The dual-channel hollow grouting anchor cable of this invention forms two independent spaces within the anchor cable body 1 through the grouting pipe 21 and the anchoring pipe 31, which are separately set inside the anchor cable body 1. These spaces can be used for anchoring and grouting operations, respectively. This allows the grouting anchor cable to perform both anchoring and grouting functions without affecting its original grouting function, while also effectively improving the initial anchoring force of the grouting anchor cable.

[0041] The structure of the anchor cable body 1 described above is existing technology. In this embodiment, the anchor cable body 1 has a strip-shaped spiral structure, which is formed by spirally winding multiple steel strands.

[0042] Specifically, the anchor cable body 1 is formed by winding nine steel strand anchoring components 3 and grouting components 2.

[0043] During construction, the anchor cable body 1 can bond with the coal or soil layer outside the borehole under the action of the anchoring agent, providing a high initial anchoring force. After the anchoring agent has solidified and passed the test, the anchor cable body 1, together with the tray 4 and locking device 5 located outside the borehole, is tensioned and pre-stressed to give the dual-channel hollow grouting anchor cable a high anchor cable prestress.

[0044] The aforementioned tray 4 and lock 5 are existing technologies and will not be described in detail here.

[0045] In some embodiments, the grouting pipe 21 is sleeved outside the anchoring pipe 31. In this case, the grouting channel is formed between the grouting pipe 21 and the anchoring pipe 31 and is an annular channel, while the pumping channel is formed inside the anchoring pipe 31 and is a columnar channel.

[0046] The arrangement of placing the grouting pipe 21 outside the anchoring pipe 31 can maximize the contact area between the grouting channel and the anchor cable body 1 while forming independent grouting channels and pumping channels. At the same time, it avoids the problem of the grouting channel being blocked by the pumping channel, making the grout injection more convenient and uniform, and ensuring good grouting effect.

[0047] At this time, the steel strands used to form the anchor cable body 1 are wound around the grouting pipe 21, as follows: Figure 2 As shown, at this time, the anchor cable body 1 and the grouting pipe 21 have the same length and both ends are located on the same plane.

[0048] In this dual-channel hollow grouting anchor cable, the anchoring component 3 and the grouting component 2 are independent of each other. The structure of the anchoring component 3 is described in detail below:

[0049] In some embodiments, the anchoring assembly 3 further includes an anchoring sleeve 32, located at the end of the anchor cable body 1 for insertion into the borehole, with the anchoring tube 31 passing through the anchoring sleeve 32. Figure 3 As shown.

[0050] The anchor sleeve 32 has two sides connected by a stepped hole along its axial direction. When the anchor sleeve 32 is fixedly fitted onto the end of the anchor cable body 1 through the stepped hole, the anchor tube 31 can pass through the stepped hole and extend relative to the anchor sleeve 32. The anchor sleeve 32 can provide a certain axial support force to the anchor tube 31, while firmly connecting the anchor cable body 1 and the anchor tube 31 together.

[0051] In this embodiment, the length of the portion of the anchoring pipe 31 extending out from the anchoring sleeve 32 can be set to 5-10 mm.

[0052] It should be noted that at this time, the inner wall of the stepped hole of the anchor sleeve 32 is firmly connected to the outer wall of the anchor cable body 1, the anchoring channel is unobstructed, and the grouting channel is closed due to the obstruction of the anchor sleeve 32.

[0053] In some embodiments, the anchor sleeve 32 is made of a metal material, such as aluminum alloy.

[0054] Through the anchor sleeve 32, the anchoring agent located in the anchor tube 31 can be smoothly injected into the borehole without leaking into the grouting channel or the hollow structure of the anchor cable body 1 during this process.

[0055] Since the anchoring pipe 31 is located inside the grouting pipe 21, care must be taken to prevent the anchoring agent from flowing into the grouting pipe 21 and clogging it, thus affecting subsequent grouting operations, when injecting the anchoring agent into the anchoring pipe 31. In some embodiments, the anchoring assembly 3 further includes an anchoring nozzle 33 for injecting the anchoring agent. The anchoring nozzle 33 has a first stepped shaft 331 formed in the axial direction that can be inserted into the anchoring pipe 31. The radial dimension of the first stepped shaft 331 is slightly smaller than the inner diameter of the anchoring pipe 31.

[0056] The anchoring nozzle 33 has an axial channel for injecting anchoring agent. When the anchoring nozzle 33 is inserted into the anchoring tube 31 through the first stepped shaft 331, the anchoring agent can be directly injected into the anchoring tube 31.

[0057] To prevent the solidification of the anchoring agent from affecting the normal progress of the grouting operation, it is generally necessary to position the end of the anchoring pipe 31 connected to the anchoring nozzle 33 (i.e., the end of the anchoring pipe 31 furthest from the borehole) inside the grouting pipe 21. In this case, to prevent the anchoring agent injected through the anchoring nozzle 33 from leaking out of the end of the anchoring pipe 31 and flowing into the grouting pipe 21, in some embodiments, when the anchoring nozzle 33 is inserted into the anchoring pipe 31 through the first stepped shaft 331, the anchoring nozzle 33 needs to squeeze the end of the anchoring pipe 31 to seal the connection between the anchoring pipe 31 and the anchoring nozzle 33.

[0058] Specifically, the end of the anchoring pipe 31 is recessed inward by 5-8 mm relative to the grouting pipe 21 and / or the anchor cable body 1.

[0059] In addition to achieving a sealed connection between the anchoring nozzle 33 and the anchoring pipe 31 by squeezing the anchoring pipe 31, in some embodiments, a sealing ring 34 is also required at the junction of the first step shaft 331 of the anchoring nozzle 33 and the end of the anchoring pipe 31. When the anchoring nozzle 33 is inserted into the anchoring pipe 31 and squeezes the anchoring pipe 31, the sealing ring 34 abuts against the anchoring pipe 31. At this time, the sealing ring 34 can undergo elastic deformation and achieve a seal at the connection between the anchoring pipe 31 and the anchoring nozzle 33, further ensuring that there will be no leakage of anchoring agent and flow into the grouting pipe 21 during the injection of anchoring agent.

[0060] Specifically, the aforementioned sealing ring 34 can be a rubber gasket, etc.

[0061] In order to make the connection between the anchor pipe 31 and the anchor nozzle 33 more stable, in some embodiments, a second stepped shaft 332 that can be inserted into the grouting pipe 21 is also formed on the anchor nozzle 33. The first stepped shaft 331 and the second stepped shaft 332 are arranged adjacent to each other and the sealing ring 34 is located at the connection between the first stepped shaft 331 and the second stepped shaft 332.

[0062] It should be noted that when the first stepped shaft 331 of the anchoring nozzle 33 is inserted into the anchoring pipe 31 and seals with it, the anchoring nozzle 33 can then be connected to the grouting pipe 21 via the second stepped shaft 332. This allows the ends of the grouting pipe 21 and the anchoring pipe 31 to remain relatively fixed via the anchoring nozzle 33. Figure 4 As shown.

[0063] The structure of the above-mentioned grouting component 2 will be described in detail below:

[0064] In some embodiments, the grouting assembly 2 further includes a grouting cage 22 sleeved on the outside of the grouting pipe 21. The number of grouting cages 22 is at least two, and all the grouting cages 22 are arranged sequentially along the axial direction of the grouting pipe 21. The side walls of the grouting pipe 21 and the grouting cage 22 that are in contact with each other are provided with grout outlet holes 23. At least one grout outlet hole 23 on the grouting pipe 21 is arranged opposite to at least one grout outlet hole 23 on the grouting cage 22. The grout in the grouting channel can be discharged through the above-mentioned grout outlet holes 23 and enter the coal seam or rock stratum fissures at the borehole to modify and reinforce the coal and rock.

[0065] It should be noted that the aforementioned grouting birdcage 22 is located inside the anchor cable body 1, that is, the anchor cable body 1 is wrapped around the grouting pipe 21 with the grouting birdcage 22. In addition, the structure of the grouting birdcage 22 is existing technology and will not be described in detail here.

[0066] Considering the flexibility of the anchor pipe 31 located inside the grouting pipe 21, its deformation may cause it to adhere to the inner wall of the grouting pipe 21 and block the grout outlet 23 located on the grouting pipe 21, thus affecting grout discharge. To overcome the above problem, in some embodiments, grout outlets 23 are arranged on both sides of the grouting pipe 21 and the grouting cage 22, and the number of grout outlets 23 on either side is at least two, such as... Figure 5 As shown.

[0067] When at least one grout outlet 23 on one side of the grouting pipe 21 is blocked and blocked by the anchor pipe 31, the other grout outlets 23 on that side and the grout outlets 23 on the other side can be connected through the grout outlets 23 formed on the grouting cage 22 that are arranged opposite to them, thereby ensuring that the grout can be discharged normally from the grouting pipe 21.

[0068] To facilitate the smooth flow of grout into the grouting channel, in some embodiments, the grouting assembly 2 further includes a grouting connector 24. At least a portion of the sidewall of the end face of the grouting connector 24 is an annular conical surface 241. This annular conical surface 241 is positioned around the axis of the grouting connector 24 on the outer sidewall where it connects to the grouting pipe 21. When the grouting connector 24 is inserted into the grouting pipe 21, the annular conical surface 241 contacts, compresses, and seals the grouting pipe 21. Figure 6 As shown.

[0069] It should be noted that when using this dual-channel hollow grouting anchor cable, the anchoring nozzle 33 and the grouting connector 24 are used for anchoring and grouting operations respectively, and therefore the two cannot be installed on the anchor cable body at the same time.

[0070] To prevent the grout from leaking out between the grouting connector 24 and the grouting pipe 21, a certain axial load needs to be applied to the grouting connector 24 to make it contact the grouting pipe 21 and squeeze the grouting pipe 21 to deform it, thereby sealing the connection between the two.

[0071] In some embodiments, a grout-stopping assembly 25 is also provided outside the anchor cable body 1. The grout-stopping assembly 25 includes a sealing sleeve 251 sleeved outside the anchor cable body 1. The sealing sleeve 251 has a force that firmly connects the anchor cable body 1 to the borehole.

[0072] In some embodiments, the grout-stopping assembly 25 further includes a grout-stopping sleeve 252 and a push tube 253, such as Figure 7As shown, the grout-stopping sleeve 252 and the pusher tube 253 are located on both sides of the sealing sleeve 251 along the axial direction. The grout-stopping sleeve 252 is fixed to the outside of the anchor cable body 1. The pusher tube 253 can move along the axial direction of the anchor cable body 1 and squeeze the sealing sleeve 251. Under the axial load provided by the pusher tube 253, the sealing sleeve 251 comes into contact with the grout-stopping sleeve 252 and deforms under the extrusion pressure. The sealing sleeve 251 shortens axially and expands radially, eventually coming into close contact with the borehole and firmly connecting with the borehole, thus achieving borehole sealing.

[0073] Specifically, the aforementioned grout-stopping sleeve 252 and push tube 253 are both made of metal, while the sealing sleeve 251 is made of a deformable material. In this embodiment, the grout-stopping sleeve 252 is made of aluminum alloy and can provide axial support force to the push tube 253 and the sealing sleeve 251, while the sealing sleeve 251 is made of rubber.

[0074] When using this dual-channel hollow grouting anchor cable for construction, the construction process mainly includes two steps: pumping the anchoring agent and high-pressure grouting. During on-site construction, the anchoring agent should be pumped in first to achieve initial anchoring of the grouting anchor cable. Then, high-pressure grouting is performed on the already anchored grouting anchor cable. The specific steps are as follows:

[0075] During the pumping of anchoring agent, the dual-channel hollow grouting anchor cable is first installed in the corresponding borehole. Then, the first step shaft 331 of the anchoring nozzle 33 is inserted into the anchoring tube 31. Since the anchoring sleeve 32 provides a certain axial support to the anchoring tube 31, the anchoring nozzle 33 can be sealed to the anchoring tube 31 via the sealing ring 34 by applying an axial external load. The pumping structure is then activated to pump the anchoring agent into the anchoring tube 31. The anchoring agent flows axially along the anchoring tube 31 and exits from the other end of the anchoring tube 31 inserted into the borehole, eventually entering the gap between the borehole and the outer surface of the anchor cable body 1. After the anchoring agent solidifies, the anchor cable body 1 can bond to the surrounding coal and rock.

[0076] After anchoring is completed, the anchor cable body 1 needs to be tensioned and pre-tightened using tray 4 and locking device 5.

[0077] During high-pressure grouting, the pusher pipe 253 is first moved towards the grout-stopping sleeve 252 by applying an axial load. Under the combined action of the pusher pipe 253 and the grout-stopping sleeve 252, the sealing sleeve 251 expands radially and comes into contact with the borehole, thus sealing the borehole. Subsequently, the grouting connector 24 is installed outside the grouting pipe 21, and an axial load is applied to seal the grouting connector 24 to the grouting pipe 21. The sealed grouting pipe 21 can withstand grouting pressures of over 20 MPa. The grout flows through the grouting connector 24 into the grouting pipe 21 and finally enters the fissures of the coal and rock through the grout outlet 23, thereby modifying and reinforcing the coal and rock.

[0078] The pumping structure for injecting anchoring agent into the anchoring tube 31 is described below:

[0079] like Figure 8 As shown, the pumping structure is driven by high-pressure gas, and the driving direction of the gas is changed by the reversing valve 63, thereby realizing the intermittent continuous pumping of the anchoring agent.

[0080] Specifically, the pumping structure mainly includes a driving component 6, a discharge component 7, and a mixing component 8. The driving component 6 is a cylinder structure, including a driving cylinder 61 and a driving piston rod 62. The driving cylinder 61 is connected to high-pressure gas, which serves as the driving force, via a reversing valve 63. The driving piston rod 62 is connected to several discharge components 7, which contain the anchoring agent, via a connecting rod. The driving piston rod 62 reciprocates along the axis of the driving cylinder 61 under the drive of the gas. The discharge component 7 includes a material box 71, a material cylinder 72, and a discharge piston rod 73. The discharge piston rod 73 is connected to the driving piston rod 62. The material box 71 is connected to both the material box 71 and the mixing component 8 via one-way valves. As the discharge piston rod 73 moves relative to the material cylinder 72, the material in the material box 71 can enter the mixing component 8 via the material cylinder 72 for mixing, and then be discharged through the mixing component 8. The mixing component 8 can be a metal mixer, the structure of which has been disclosed in related technologies and will not be described further here.

[0081] The quantity of the above-mentioned material outlet 7 is at least two, and the specific quantity will be adjusted according to the adjustment of the anchoring agent formula.

[0082] In addition to the above-described structure, the pumping structure also includes a discharge structure for venting excess gas from the drive cylinder 61 and a cleaning structure for cleaning the mixing component 8. The connection relationships and specific constructions of these structures with the various components of the pumping structure are as follows: Figure 8 As shown, it will not be elaborated further here.

[0083] It is understood that the dual-channel hollow grouting anchor cable provided in this embodiment of the invention can form independent pumping channels and grouting channels within a limited space. The grouting channel has a ring structure. By combining this anchor cable with different equipment, the anchoring and grouting functions can be achieved separately. Specifically, when this anchor cable is used in conjunction with a corresponding anchoring agent pumping device, the existing anchoring agent anchoring process can be modified, increasing the anchoring length and improving the initial anchoring force.

[0084] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0085] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0086] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0087] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0088] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0089] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A dual-channel hollow grouting anchor cable, characterized in that, include: Anchor cable body (1), wherein the anchor cable body (1) is a hollow structure; Grouting assembly (2), the grouting assembly (2) includes a grouting pipe (21) located in the hollow structure of the anchor cable body (1). Anchoring assembly (3), the anchoring assembly (3) includes an anchoring tube (31) located in the hollow structure of the anchor cable body (1). Both the grouting pipe (21) and the anchoring pipe (31) extend along the axial direction of the anchor cable body (1). The grouting pipe (21) is located outside the anchoring pipe (31), and the grouting pipe (21) and the anchoring pipe (31) are separately arranged. The end of the anchoring pipe (31) that is inserted into the borehole relative to the anchor cable body (1) extends outward relative to the anchor cable body (1). The grouting pipe (21) is sleeved on the outside of the anchoring pipe (31). The grouting channel is formed between the grouting pipe (21) and the anchoring pipe (31), and the pumping channel is formed inside the anchoring pipe (31). The anchoring assembly (3) also includes an anchoring sleeve (32), which is located at one end of the anchor cable body (1) for insertion into the borehole, and the anchoring tube (31) passes through the anchoring sleeve (32). The anchoring assembly (3) also includes an anchoring nozzle (33) for injecting anchoring agent, one axial end of the anchoring nozzle (33) forming a first stepped shaft (331) that can be inserted into the anchoring tube (31). The grouting assembly (2) also includes a grouting birdcage (22) sleeved on the outside of the grouting pipe (21). There are at least two grouting birdcages (22), and all the grouting birdcages (22) are arranged sequentially along the axial direction of the grouting pipe (21). The side walls of the grouting pipe (21) and the grouting birdcage (22) that are in contact with each other are provided with grout outlet holes (23). At least one grout outlet hole (23) on the grouting pipe (21) is arranged opposite to at least one grout outlet hole (23) on the grouting birdcage (22). An anchor cable body (1) is also provided with a grout-stopping assembly (25). The grout-stopping assembly (25) includes a sealing sleeve (251) sleeved on the outside of the anchor cable body (1). The sealing sleeve (251) has the force to firmly connect the anchor cable body (1) with the borehole. The grout-stopping assembly (25) further includes a grout-stopping sleeve (252) and a pusher tube (253). The grout-stopping sleeve (252) and the pusher tube (253) are located on opposite sides of the sealing sleeve (251) along the axial direction. The grout-stopping sleeve (252) is fixed outside the anchor cable body (1). The pusher tube (253) can move along the axial direction of the anchor cable body (1) and squeeze the sealing sleeve (251).

2. The dual-channel hollow grouting anchor cable according to claim 1, characterized in that, The anchoring nozzle (33) also forms a second stepped shaft (332) in the axial direction that can be inserted into the grouting pipe (21), and the second stepped shaft (332) is arranged adjacent to the first stepped shaft (331); And / or, a sealing ring (34) is provided at the junction of the first step shaft (331) and the end of the anchor tube (31). When the anchoring nozzle (33) is inserted into the anchor tube (31) and squeezes the anchor tube (31), the sealing ring (34) abuts against the anchor tube (31).

3. The dual-channel hollow grouting anchor cable according to claim 1, characterized in that, The grouting pipe (21) and the grouting birdcage (22) are provided with grout outlet holes (23) on both sides, and the number of grout outlet holes (23) on any side is at least two.

4. The dual-channel hollow grouting anchor cable according to claim 1, characterized in that, The grouting assembly (2) also includes a grouting connector (24), at least part of the sidewall of the end face of the grouting connector (24) is an annular conical surface (241). When the grouting connector (24) is inserted into the grouting pipe (21), the annular conical surface (241) can contact, squeeze and seal the grouting pipe (21).

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