Support anchor cables and support structures

Abstract

The present invention relates to a support anchor cable and a support structure, comprising: an installation assembly, the installation assembly comprising a first pressure-bearing plate and a second pressure-bearing plate, the first pressure-bearing plate and the second pressure-bearing plate being spaced apart and arranged at different length positions of the support anchor cable; an anchor assembly, the anchor assembly comprising a first anchor and a second anchor; an anchor cable rod group, the anchor cable rod group comprising a first unit rod body locked with the first anchor, and a second unit rod body locked with the second anchor; and an anchor bar group, the anchor bar group comprising a first anchor bar sleeved on the outside of the first unit rod body, and a second anchor bar sleeved on the second unit rod body. In this way, concentrated loads can achieve load dispersion at different positions of the anchor cable consolidation body, thereby effectively reducing the peak value of the bonding strength, reducing the probability of the bonding strength being detached or weakened, and thus maximizing the interface strength between the rod body and the consolidation body, and between the consolidation body and the stratum within the entire support anchor cable anchoring section, thereby improving the support performance.

Description

Technical Field

[0001] The invention relates to the technical field of building support engineering, and in particular to a support anchor cable and a support structure. Background Art

[0002] Traditionally, during the stress-bearing process of anchor cables, the load cannot be evenly distributed in the consolidated body, resulting in a more prominent stress concentration phenomenon. That is, due to the uneven bonding force of the anchor cables, as the load on the consolidated body continues to increase, before the load is transmitted to the lowest end of the consolidated body, the bonding strength between the anchor cable rod body and the consolidated body, and between the consolidated body and the stratum will gradually become detached or weakened, resulting in an increased probability of anchor cable failure, which is very likely to cause problems such as falling off and breaking, seriously affecting the performance of the support structure. Summary of the invention

[0003] Based on this, it is necessary to provide a supporting anchor cable and supporting structure that can effectively disperse the load, reduce or eliminate stress concentration, increase the bonding strength between the anchor cable rod body and the consolidation body, and between the anchor body and the formation, and improve the support performance.

[0004] The technical solution is as follows:

[0005] In one aspect, the present application provides a support anchor cable, comprising:

[0006] An installation assembly, the installation assembly comprising a first pressure-bearing plate and a second pressure-bearing plate, the first pressure-bearing plate and the second pressure-bearing plate being spaced apart and arranged at different length positions of the support anchor cable;

[0007] An anchor assembly, the anchor assembly comprising a first anchor disposed on the first pressure-bearing plate, and a second anchor disposed on the second pressure-bearing plate;

[0008] An anchor rod group, the anchor rod group comprising a first unit rod body penetrating the first pressure-bearing plate and locked with the first anchor, and a second unit rod body penetrating the second pressure-bearing plate and locked with the second anchor; and

[0009] An anchor bar group, the anchor bar group includes a first anchor bar arranged on the first pressure plate and sleeved on the outside of the first unit rod body, and a second anchor bar arranged on the second pressure plate and sleeved on the second unit rod body.

[0010] When the above-mentioned support anchor cable is applied to the support structure, since the first pressure plate and the second pressure plate are at different length positions of the support anchor cable, and the first anchor and the second anchor can be used to install and fix the corresponding first unit rod body and the first anchor bar, as well as the second unit rod body and the second anchor bar. In this way, the concentrated load can be evenly distributed to the first pressure plate and the second pressure plate at different length positions, and the stress can continue to be effectively transmitted to the first unit rod body and the second unit rod body through the first anchor bar and the second anchor bar and dispersedly consumed, that is, the load can be dispersed at different positions of the anchor cable consolidation body, thereby effectively reducing the peak value of the bonding strength, and reducing the probability of the bonding strength being detached or weakened, thereby maximizing the interface strength between the rod body and the consolidation body, and between the consolidation body and the stratum within the entire support anchor cable anchoring section, thereby improving the support performance.

[0011] The technical solution of this application is further described below:

[0012] In one embodiment, the installation assembly also includes a third pressure plate, and the third pressure plate and the second pressure plate are spaced apart at different lengths of the support anchor, and the third pressure plate is located on the side of the second pressure plate away from the first pressure plate; the anchor assembly also includes a third anchor arranged on the third pressure plate, the anchor rod group also includes a third unit rod body passing through the third pressure plate and locked with the third anchor, and the anchor bar group also includes a third anchor bar, and the third anchor bar is arranged on the third pressure plate and sleeved on the outside of the third unit rod body.

[0013] In one embodiment, the first anchor bar, the second anchor bar and the third anchor bar are all spiral structures, and all three are fixed to the corresponding pressure plate by end welding.

[0014] In one embodiment, the number of the first anchor bar, the second anchor bar and the third anchor bar are two each, and they are arranged in a ring direction.

[0015] In one of the embodiments, a grouting pipe is further included. The grouting pipe is arranged between the first anchor bar, the second anchor bar and the third anchor bar, and a grouting hole is opened on the pipe wall of the grouting pipe.

[0016] In one of the embodiments, a guide cap is further included, and the guide cap is disposed on the third pressure plate and away from the first pressure plate.

[0017] In one embodiment, the first unit rod body, the second unit rod body and the third unit rod body have the same structure and all include an outer tube, a steel strand inserted in the outer tube, and a lubricating medium arranged between the inner tube wall of the outer tube and the steel strand.

[0018] In one of the embodiments, two strip-shaped protrusions are arranged at intervals on the outer tube wall of the outer packaging tube, and the strip-shaped protrusions are provided with channels, one of the channels is passed through by a positive wire, and the other channel is passed through by a negative wire; the first anchor, the second anchor and the third anchor are all electrically fusible anchors, and the positive wire and the negative wire are electrically connected to the electrically fusible anchors respectively.

[0019] In one embodiment, the first anchor, the second anchor and the third anchor all include an outer shell, an insulating layer arranged on the inner wall of the outer shell, a heating element arranged on the inner wall of the insulating layer, and a melting layer arranged on the inner wall of the heating element; the steel strand is tightly fitted with the melting layer; the melting layer is electrically connected to the positive wire and the negative wire.

[0020] On the other hand, the present application also provides a support structure, which includes the support anchor cable as described above. Therefore, the support structure can effectively disperse the load, reduce or eliminate the stress concentration phenomenon, improve the bonding strength between the anchor cable rod body and the consolidation body, the anchor body and the stratum, and improve the support performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of a supporting anchor cable according to an embodiment of the present invention;

[0022] Figure 2 A schematic cross-sectional view of a first unit rod body (or a second unit rod body or a third unit rod body) according to an embodiment of the present invention;

[0023] Figure 3 It is a structural schematic diagram of a pillar structure according to an embodiment of the present invention.

[0024] Description of reference numerals:

[0025] 10. Installation assembly, 11. First pressure plate, 12. Second pressure plate, 13. Third pressure plate, 20. Anchor assembly, 21. First anchor, 22. Second anchor, 23. Third anchor, 30. Anchor rod group, 31. First unit rod body, 32. Second unit rod body, 33. Third unit rod body, 34. Outer tube, 35. Steel strand, 36. Lubricating medium, 37. Positive conductor, 38. Negative conductor, 40. Anchor bar group, 41. First anchor bar, 42. Second anchor bar, 43. Third anchor bar, 50. Grouting pipe, 60. Guide cap, 70. Working ground, 80. Support pile, 90. Fine stone concrete facing, 100. Anchor cable waist beam, 200. Wedge-shaped pedestal, 300. Anchor pad, 400. Anchor head anchor. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be understood that the specific implementation methods described herein are only used to explain the present invention and do not limit the scope of protection of the present invention.

[0027] It should be noted that when an element is referred to as being "fixed on", "arranged on" or "mounted on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time; the specific method of fixedly connecting one element to another element can be achieved by existing technologies, which will not be described in detail here, and preferably a threaded connection is used.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0029] The “first” and “second” mentioned in the present invention do not represent specific quantities and orders, but are merely used to distinguish names.

[0030] like Figure 3 As shown, a support structure of an embodiment claimed for protection in the present application is constructed at a construction site. Specifically, a support pile 80 (wall) is constructed on the working ground 70, and the support pile 80 is provided with an oblique through hole. The support anchor cable passes through the through hole and extends deep into the stratum, wherein the support anchor cable is composed of a free section and an anchoring section. The so-called anchoring section is the section where concrete slurry needs to be poured outside the anchor cable to form a consolidation body, and is connected and fixed to the stratum through the consolidation body; correspondingly, the so-called free section is the part of the anchor cable where no concrete consolidation body is poured outside.

[0031] The outer surface of the support pile 80 is covered with a fine stone concrete protective surface 90 to protect the support pile 80 from being damaged. An anchor cable waist beam 100 is installed on the fine stone concrete protective surface 90, a wedge-shaped pedestal 200 is installed on the anchor cable waist beam 100, an anchor pad 300 is installed on the wedge-shaped pedestal 200, and an anchor head anchor 400 is provided on the anchor pad 300 for locking the steel strand 35 of the support anchor cable extending out of the fine stone concrete curved surface.

[0032] Among them, in order to ensure structural strength and control costs, it is more preferred that the anchor cable waist beam 100 is an H-shaped steel structure; the wedge-shaped pedestal 200 is a triangular cast iron structure; the anchor plate 300 is a square steel plate with a circular hole; and the anchor head anchor is a cylindrical cast iron structure with a clip hole.

[0033] The support structure can effectively disperse the load, reduce or eliminate stress concentration, increase the bonding strength between the anchor rod and the consolidation body, and between the anchor body and the formation, and improve the support performance.

[0034] Please continue reading Figure 1 In addition, in one embodiment, the support anchor cable includes: an installation assembly 10, an anchor assembly 20, an anchor cable rod group 30 and an anchor bar group 40. The installation assembly 10 includes a first pressure-bearing plate 11 and a second pressure-bearing plate 12, and the first pressure-bearing plate 11 and the second pressure-bearing plate 12 are arranged at different lengths of the support anchor cable; the anchor assembly 20 includes a first anchor 21 arranged on the first pressure-bearing plate 11, and a second anchor 22 arranged on the second pressure-bearing plate 12; the anchor cable rod group 30 includes a first unit rod body 31 that passes through the first pressure-bearing plate 11 and is locked with the first anchor 21, and a second unit rod body 32 that passes through the second pressure-bearing plate 12 and is locked with the second anchor 22; the anchor bar group 40 includes a first anchor bar 41 that is arranged on the first pressure-bearing plate 11 and is sleeved on the outside of the first unit rod body 31, and a second anchor bar 42 that is arranged on the second pressure-bearing plate 12 and is sleeved on the second unit rod body 32.

[0035] When the above-mentioned support anchor cable is applied to the support structure, since the first pressure plate 11 and the second pressure plate 12 are at different length positions of the support anchor cable, and the corresponding first unit rod body 31 and the first anchor bar 41, as well as the second unit rod body 32 and the second anchor bar 42 can be installed and fixed respectively through the first anchor 21 and the second anchor 22. In this way, the concentrated load can be evenly distributed to the first pressure plate 11 and the second pressure plate 12 at different length positions, and the stress can continue to be effectively transmitted to the first unit rod body 31 and the second unit rod body 32 through the first anchor bar 41 and the second anchor bar 42 and dispersed and consumed, that is, the load can be dispersed at different positions of the anchor cable consolidation body, thereby effectively reducing the peak value of the bonding strength, and reducing the probability of the bonding strength being detached or weakened, thereby maximizing the interface strength between the rod body and the consolidation body, and between the consolidation body and the stratum within the entire support anchor cable anchoring section, thereby improving the support performance.

[0036] Please continue reading Figure 1, further, in one embodiment, in order to evenly disperse the concentrated load and apply it to the anchor cable consolidation body, the installation assembly 10 further includes a third pressure plate 13, the third pressure plate 13 and the second pressure plate 12 are arranged at different lengths of the support anchor cable, and the third pressure plate 13 is located on the side of the second pressure plate 12 away from the first pressure plate 11; the anchor assembly 20 further includes a third anchor 23 arranged on the third pressure plate 13, the anchor cable rod group 30 further includes a third unit rod body 33 that penetrates the third pressure plate 13 and is locked with the third anchor 23, and the anchor bar group 40 further includes a third anchor bar 43, the third anchor bar 43 is arranged on the third pressure plate 13 and sleeved on the outside of the third unit rod body 33. In this way, the peak value of the bonding strength can be further reduced, the probability of the bonding strength being detached or weakened is reduced, and the bonding strength between the rod body and the consolidation body, and between the consolidation body and the stratum within the entire support anchor cable anchoring section can be maximized.

[0037] Please continue reading Figure 1 Preferably, the first anchor bar 41, the second anchor bar 42 and the third anchor bar 43 are all spiral structures, and all three are fixed to the corresponding pressure plate by end welding. The welding connection method can ensure the connection strength between each anchor bar and the corresponding pressure plate, and it is not easy to loosen under load. In addition, the spiral structure can ensure the continuity and effectiveness of load transfer, so as to more efficiently share the force of the pressure plate and improve the strength of the consolidation body near the load-bearing end.

[0038] In one embodiment, the number of the first anchor bar 41, the second anchor bar 42 and the third anchor bar 43 are two each, and they are arranged in a ring direction.

[0039] During construction, it is necessary to first drill a grouting hole in the stratum, then insert the supporting anchor cable into the grouting hole, and then inject concrete slurry to form a concrete consolidation body outside the anchor cable. However, due to the influence of construction conditions and stratum structure, the initially formed concrete consolidation body is not dense enough, and the existing bubbles or gaps will seriously reduce the structural strength of the concrete consolidation body, resulting in reduced support capacity. In response to this problem, in a further implementation scheme, the support anchor cable also includes a grouting pipe 50, and the grouting pipe 50 is arranged in the middle of the first anchor bar 41, the second anchor bar 42 and the third anchor bar 43, and the pipe wall of the grouting pipe 50 is provided with a slurry outlet hole. That is, secondary grouting can be performed through the grouting pipe 50, and the slurry seeping out from the slurry outlet hole can fill the existing gaps and squeeze out the bubbles, so that the concrete consolidation body forms a dense structure.

[0040] Optionally, the grouting pipe 50 is a PVC pipe with a plurality of circular holes on the outer circumference.

[0041] Please continue reading Figure 1 Further, in order to facilitate the support anchor cable to penetrate into the grouting hole, the support anchor cable also includes a guide cap 60, which is arranged on the third pressure plate 13 and away from the first pressure plate 11. The guide cap 60 is a fan-shaped or conical shell, so it has a better guiding effect.

[0042] Please continue reading Figure 1 and Figure 2 In one embodiment, the first unit rod body 31, the second unit rod body 32 and the third unit rod body 33 have the same or similar structures. Preferably, in order to reduce the difficulty of material procurement and manufacturing, the three units adopt the same structure. That is, the first unit rod body 31, the second unit rod body 32 and the third unit rod body 33 all include an outer tube 34, a steel strand 35 inserted in the outer tube 34, and a lubricating medium 36 provided between the inner tube wall of the outer tube 34 and the steel strand 35. The steel strand 35 serves as a load-bearing body and can bear the anchor stress. The outer tube 34 covers the steel strand 35 inside to prevent the steel strand 35 from getting damp and rusting. The diameter of the steel strand 35 needs to be smaller than the inner diameter of the outer tube 34 so that the fitting gap can be filled with the lubricating medium 36. This can further protect the steel strand 35 and prevent closure rupture and groundwater from entering the tube and corroding the steel strand 35. It can also play a lubricating role, making it easier for workers to pull the steel strand 35 out of the outer tube 34 for recycling and secondary use.

[0043] In one embodiment of the present case, two strip-shaped protrusions are arranged at intervals on the outer tube wall of the outer tube 34, and the strip-shaped protrusions are provided with holes, one of which is penetrated by a positive wire 37, and the other is penetrated by a negative wire 38; the positive wire 37 and the negative wire 38 are electrically connected to the powered fuse anchor respectively. The first anchor 21, the second anchor 22 and the third anchor 23 are all powered fuse anchors, and the first anchor 21, the second anchor 22 and the third anchor 23 all include an outer shell, a heat insulation layer arranged on the inner wall of the outer shell, a heating element arranged on the inner side wall of the heat insulation layer, and a melting layer arranged on the inner side wall of the heating element, the steel strand 35 is tightly matched with the melting layer; the melting layer is electrically connected to the positive wire 37 and the negative wire 38.

[0044] When the support work at the construction site is completed, the steel strand 35 in the support anchor cable can be recovered. The specific operation method is: turn on the recovery device and supply power to the positive and negative conductors 38; the heating element generates high temperature after obtaining electrical energy to melt the molten layer, and then the steel strand 35 can be separated from the clamping force of the molten layer, that is, the anchor is powered on and unlocked. The steel strand 35 can then be pulled out for recovery. The setting of the heat insulation layer can prevent the high temperature generated by the heating element from being transmitted to the outside and causing damage to other components.

[0045] It can be understood that the molten layer can be molten metal, such as aluminum, copper alloy, etc.

[0046] Optionally, the steel strand 35 is a low-relaxation prestressed steel strand 35 with a strength of 1860 MPa. The pressure plate is a high-strength alloy steel material with a threaded hole, and the threaded hole can be tightened with the external thread section of the shell to achieve the installation of the anchor on the pressure plate. The lubricating medium 36 is solid grease. The outer tube 34 is made of PE material, which has the advantages of low cost and high hardness.

[0047] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0048] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A supporting anchor cable, characterized in that: include: An installation assembly, the installation assembly comprising a first pressure-bearing plate and a second pressure-bearing plate, the first pressure-bearing plate and the second pressure-bearing plate being spaced apart and arranged at different length positions of the support anchor cable; An anchor assembly, the anchor assembly comprising a first anchor disposed on the first pressure-bearing plate, and a second anchor disposed on the second pressure-bearing plate; An anchor rod group, the anchor rod group comprising a first unit rod body penetrating the first pressure-bearing plate and locked with the first anchor, and a second unit rod body penetrating the second pressure-bearing plate and locked with the second anchor; An anchor bar group, the anchor bar group includes a first anchor bar arranged on the first pressure plate and sleeved on the outside of the first unit rod body, and a second anchor bar arranged on the second pressure plate and sleeved on the second unit rod body; The first anchor bar and the second anchor bar are both spiral structures, and are both fixed to the corresponding pressure plate by end welding; and Support piles are constructed on the working ground and are provided with oblique through holes. Support anchor cables penetrate through the through holes and extend deep into the ground. The outer surface of the support piles is covered with fine stone concrete facing, on which an anchor cable waist beam is installed, on which a wedge-shaped pedestal is installed, on which an anchor pad is installed, and on which an anchor head anchor is provided for locking the steel strand of the support anchor cable extending out of the fine stone concrete arc surface.

2. The support anchor cable according to claim 1, characterized in that: The mounting assembly also includes a third pressure plate, and the third pressure plate and the second pressure plate are spaced apart at different lengths of the supporting anchor cable, and the third pressure plate is located on a side of the second pressure plate away from the first pressure plate; the anchor assembly also includes a third anchor arranged on the third pressure plate, and the anchor rod group also includes a third unit rod body passing through the third pressure plate and locked with the third anchor, and the anchor bar group also includes a third anchor bar, and the third anchor bar is arranged on the third pressure plate and sleeved on the outside of the third unit rod body.

3. The support anchor cable according to claim 2, characterized in that: The third anchor bar is a spiral structure and is fixed to the corresponding pressure plate by welding at the end.

4. The support anchor cable according to claim 2, characterized in that: The number of the first anchor bar, the second anchor bar and the third anchor bar are two each, and they are arranged in a ring direction.

5. The supporting anchor cable according to claim 4, characterized in that: It also includes a grouting pipe, which is arranged in the middle of the first anchor bar, the second anchor bar and the third anchor bar, and the pipe wall of the grouting pipe is provided with a grout outlet hole.

6. The supporting anchor cable according to claim 2, characterized in that: It also includes a guide cap, which is arranged on the third pressure plate and away from the first pressure plate.

7. The supporting anchor cable according to claim 2, characterized in that: The first rod unit, the second rod unit and the third rod unit have the same structure and all include an outer tube, a steel strand inserted in the outer tube, and a lubricating medium arranged between the inner tube wall of the outer tube and the steel strand.

8. The supporting anchor cable according to claim 7, characterized in that: Two strip-shaped protrusions are arranged at intervals on the outer tube wall of the outer tube, and the strip-shaped protrusions are provided with channels, one of the channels is passed through by a positive wire, and the other channel is passed through by a negative wire; the first anchor, the second anchor and the third anchor are all electrically-fused anchors, and the positive wire and the negative wire are electrically connected to the electrically-fused anchors respectively.

9. The supporting anchor cable according to claim 8, characterized in that: The first anchor, the second anchor and the third anchor all include an outer shell, a heat insulating layer arranged on the inner wall of the outer shell, a heating element arranged on the inner wall of the heat insulating layer, and a melting layer arranged on the inner wall of the heating element; the steel strand is tightly fitted with the melting layer; the melting layer is electrically connected to the positive wire and the negative wire.

10. A support structure, characterized in that: It comprises the supporting anchor cable as described in any one of claims 1 to 9 above.

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