CN217028974U - Series combined energy-absorbing anchor rod system - Google Patents
Series combined energy-absorbing anchor rod system Download PDFInfo
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- CN217028974U CN217028974U CN202221016867.2U CN202221016867U CN217028974U CN 217028974 U CN217028974 U CN 217028974U CN 202221016867 U CN202221016867 U CN 202221016867U CN 217028974 U CN217028974 U CN 217028974U
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- Prior art keywords
- anchor rod
- absorbing
- anchoring end
- energy
- constant
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- 238000004873 anchoring Methods 0.000 claims abstract description 48
- 230000006835 compression Effects 0.000 claims abstract description 7
- 238000007906 compression Methods 0.000 claims abstract description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 238000003466 welding Methods 0.000 claims description 3
- 239000011435 rock Substances 0.000 abstract description 25
- 238000010521 absorption reaction Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 8
- 230000008093 supporting effect Effects 0.000 description 8
- 239000003795 chemical substances by application Substances 0.000 description 5
- 239000011347 resin Substances 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000009412 basement excavation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 108091023663 let-7 stem-loop Proteins 0.000 description 1
- 108091063478 let-7-1 stem-loop Proteins 0.000 description 1
- 108091049777 let-7-2 stem-loop Proteins 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
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Abstract
The utility model discloses a series combined energy-absorbing anchor rod system which comprises an outer anchoring end and an inner anchoring end, wherein a plurality of constant-resistance energy-absorbing components and anchor rods are sequentially and circularly connected between the outer anchoring end and the inner anchoring end. The anchor rod system changes the traditional integrated anchor rod into a segmented combined type, utilizes the strong energy absorption capacity of the anchor rod and the capacity of adapting to large deformation of the surrounding rock, and can weaken sudden deformation of the surrounding rock, inhibit rock burst damage and maintain the stability of the engineering surrounding rock such as a roadway, a tunnel and the like by compression deformation of the spring and friction, pressure relief and energy absorption of the tensile member and the inner wall of the sleeve when rock burst or large impact load occurs.
Description
Technical Field
The utility model belongs to the technical field of geotechnical engineering supporting equipment, and relates to a series combined energy-absorbing anchor rod system.
Background
With the continuous development of the traffic industry in China, the buried depth of the tunnel is larger and larger, and the geology of the penetrated rock stratum is more and more complicated. The tunnel excavation method has the advantages that large deformation is easy to occur in the tunnel excavation process, collapse accidents occur, the quality and the progress of engineering are seriously influenced, and the personal safety of operating personnel is threatened. In this case, a bolting structure having a large deformation, yielding, pressure relief, energy absorption, and other capabilities is generally required. However, the existing bolting structures with these capabilities generally have the following problems: firstly, the constant-resistance large-deformation anchor rod with good supporting effect is high in production price, so that the supporting cost is obviously increased undoubtedly; secondly, the existing anchoring device with constant resistance and large deformation performance has shortcomings, and particularly, part of the device needs to be additionally arranged at the tail of the anchor rod and protrudes out of the surface of surrounding rock, so that the tail of the anchor rod leaks too long, further the danger of construction operation environment is increased, and the related specifications also require that the leakage length cannot be too long. These factors limit the deformability of these devices, making them not very well applicable to support works under conditions of large deformation of the surrounding rock, in particular in rock burst tunnel works. Therefore, for reinforcing the deformation and yielding capacity of the supporting structure, the control effect on the large-deformation roadway or the tunnel surrounding rock is improved, and the segmented combined constant-resistance energy absorption device which is low in cost, convenient to process and apply and capable of remarkably enhancing the supporting effect of the large-deformation roadway is necessary.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a series combined type energy-absorbing anchor rod system, which solves the problem that the energy-absorbing capacity and the instantaneous extension capacity of the conventional anchor rod are weak.
The technical scheme adopted by the utility model is as follows: the series combined energy-absorbing anchor rod system comprises an outer anchoring end and an inner anchoring end, wherein a plurality of constant-resistance energy-absorbing components and anchor rods are sequentially and circularly connected between the outer anchoring end and the inner anchoring end.
The utility model is also characterized in that:
the two end heads of the anchor rod are lathed with external threads, the inner anchoring end is a circular truncated cone component with a small-diameter connecting end provided with an internal thread hole, the outer anchoring end is a T-shaped structure formed by welding a circular steel plate and a steel bar, and the connecting end head of the outer anchoring end is lathed with external threads.
Constant resistance energy-absorbing component includes the sleeve, and telescopic both ends rigid coupling has apron I and apron II, and apron I all is provided with central through-hole with apron II, and the central through-hole of apron II has the screw thread.
An axial pull rod is installed in the middle of the sleeve, a compression spring is sleeved on the axial pull rod and fixedly connected with one end, far away from the outer anchoring end, of the axial pull rod, and the other end of the axial pull rod penetrates through a central through hole of the cover plate I.
The outer anchoring end is in threaded connection with an axial pull rod of the constant-resistance energy-absorbing member positioned at the head, one end of the anchor rod is in threaded connection with an axial pull rod of the adjacent constant-resistance energy-absorbing member, the other end of the anchor rod is in threaded connection with a cover plate II of the next section of constant-resistance energy-absorbing member, and the anchor rod positioned at the tail is in threaded connection with the inner anchoring end.
The utility model has the beneficial effects that:
1. the series combined type energy-absorbing anchor rod system changes the traditional integrated anchor rod into a segmented combined type, can be flexibly spliced and used according to the requirement of the supporting length, the characteristics of surrounding rocks and the like, and can better adapt to the deformation of the surrounding rocks;
2. the anchor rod system can meet the requirement of support strength, and can also meet the requirement of continuously ensuring the support quality under the condition of sudden large deformation of surrounding rocks, so that the elongation of the anchor rod is improved, and the elongation of the anchor rod is increased;
3. the utility model is connected by screw thread, has simple structure and convenient and rapid installation, and is beneficial to replacing damaged parts and realizing standard quantitative production.
Drawings
FIG. 1 is a schematic structural view of a tandem modular energy absorbing anchor system of the present invention;
fig. 2 is a detailed construction diagram of each component of the bolting system according to the utility model.
In the figure, 1 is an outer anchoring end, 2 is a constant-resistance energy-absorbing component, 3 is an anchor rod, 4 is an inner anchoring end, 5 is a cover plate I, 6 is a sleeve, 7 is an axial pull rod, 8 is a compression spring, and 9 is a cover plate II.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
The series combined energy-absorbing anchor rod system provided by the utility model has a structure shown in figure 1, and comprises an outer anchoring end 1 and an inner anchoring end 4, wherein a plurality of constant-resistance energy-absorbing members 2 and anchor rods 3 are sequentially and circularly connected between the outer anchoring end 1 and the inner anchoring end 4.
As shown in fig. 2, the anchor rod 3 is a main stressed member in the surrounding rock supporting process, the heads at two ends of the anchor rod are provided with external threads, the inner anchoring end 4 is a circular truncated cone member with a small-diameter connecting end provided with an internal thread hole, the diameter of the small-diameter end is slightly larger than the external diameter of the anchor rod 3, the outer anchoring end 1 is a T-shaped structure formed by welding a circular steel plate and a steel bar with the same diameter and the same material as the anchor rod 3, and the connecting head of the outer anchoring end 1 is provided with external threads.
Constant resistance energy-absorbing component 2 is the main release energy-absorbing part of series connection combination formula energy-absorbing stock system, including sleeve 6, and the both ends rigid coupling of sleeve 6 has apron I5 and apron II 9, and apron I5 and apron II 9 all are provided with central through-hole, and the central through-hole of apron II 9 has the screw thread.
An axial pull rod 7 is installed in the middle of the sleeve 6, a compression spring 8 is sleeved on the axial pull rod 7 and fixedly connected with one end, far away from the outer anchoring end 1, of the axial pull rod 7, and the other end of the axial pull rod 7 penetrates through a central through hole of the cover plate I5. Aperture of the central through hole of apron I5 and apron II 9 is different, and the central through hole on the apron I5 can let 7 minor diameter ends of axial pull rod pass through, apron II 9 and the 3 threaded connection of next section stock.
The sleeve 6 and the cover plates I5 and II 9 at two ends have the function of protecting stress parts inside the sleeve 6, so that the components such as the compression spring 8 in the surrounding rock and the sleeve 6 unit can be isolated, and the normal movement of the axial pull rod 7 can be ensured.
The outer anchoring end 1 is in threaded connection with an axial pull rod 7 of the constant-resistance energy-absorbing component 2 located at the head, one end of the anchor rod 3 is in threaded connection with the axial pull rod 7 of the adjacent constant-resistance energy-absorbing component 2, the other end of the anchor rod is in threaded connection with a cover plate II 9 of the next constant-resistance energy-absorbing component 2, and the anchor rod 3 located at the tail is in threaded connection with the inner anchoring end 4.
The working principle of the utility model is as follows: when surrounding rock near the tunnel wall is greatly deformed or is rockburst, tensile force can be generated on the outer anchoring end 1 to drive the axial pull rod 7 to slide, the compression spring 8 starts to compress in the sliding process of the axial pull rod 7, meanwhile, the axial pull rod 7 and the inner wall of the sleeve 6 are rubbed, and the two act together to consume the deformation energy of the surrounding rock and delay the deformation speed of the surrounding rock. The springing of the surrounding rock of the tunnel wall can be restrained through the limit deformation of the constant-resistance energy-absorbing member 2. Through the pressure relief limiting function of the constant-resistance energy-absorbing members 2, the accumulation of the energy inside the surrounding rock can be reduced, so that the aims of weakening or preventing the damage of rock burst and ensuring the stability of the surrounding rock are fulfilled.
The following is a detailed description of a specific embodiment.
The series combined type energy-absorbing anchor rod system is implemented according to the following steps:
step 1: assembling the anchor rod:
step 1.1: connecting the anchor rod and the constant-resistance energy-absorbing member according to actual conditions on site;
step 1.2: the tail part of the anchor rod is connected with an inner anchoring end.
And 2, step: drilling and anchoring, the specific process is as follows:
step 2.1: adopting a mechanical drilling mode to drill holes at the designed hole positions of the support;
step 2.2: checking the hole forming condition, and crushing the sharp corner of the abnormally raised gravel in the anchoring hole for the second time to prevent local stress concentration in the subsequent use process;
step 2.3: the debris in the hole, rock piece are cleared up, follow-up production stress concentration is prevented, the frictional force between stock and the rock mass is reduced, and the supporting effect is weakened.
And 3, step 3: the anchor rod installation, concrete process is:
step 3.1: installing a resin anchoring agent, feeding the resin anchoring agent into the anchor rod hole, and slowly pushing the resin anchoring agent into the fundus by using the anchor rod;
step 3.2: vibrating and stirring the resin anchoring agent to ensure that the anchor rod is tightly connected with the surrounding rock through the anchoring agent;
step 3.3: and after the anchoring strength is achieved, the outer end of the constant-resistance energy-absorbing member is connected with an outer anchoring end.
Claims (5)
1. The series combined energy-absorbing anchor rod system is characterized by comprising an outer anchoring end (1) and an inner anchoring end (4), wherein a plurality of constant-resistance energy-absorbing components (2) and anchor rods (3) are sequentially and circularly connected between the outer anchoring end (1) and the inner anchoring end (4).
2. The series combined energy-absorbing anchor rod system according to claim 1, wherein the two end heads of the anchor rod (3) are externally threaded, the inner anchoring end (4) is a circular truncated cone member with a small-diameter connecting end provided with an internal threaded hole, the outer anchoring end (1) is a T-shaped structure formed by welding a circular steel plate and a steel bar, and the connecting end head of the outer anchoring end (1) is externally threaded.
3. A series-connection combined energy-absorbing anchor rod system according to claim 2, wherein the constant-resistance energy-absorbing member (2) comprises a sleeve (6), a cover plate i (5) and a cover plate ii (9) are fixedly connected to two ends of the sleeve (6), the cover plate i (5) and the cover plate ii (9) are both provided with a central through hole, and the central through hole of the cover plate ii (9) is threaded.
4. A series-connected combined energy-absorbing anchor rod system according to claim 3, wherein an axial tie rod (7) is installed at the middle part of the sleeve (6), a compression spring (8) is sleeved on the axial tie rod (7) and fixedly connected with one end of the axial tie rod (7) far away from the outer anchoring end (1), and the other end of the axial tie rod (7) penetrates through the central through hole of the cover plate i (5).
5. The series combined energy-absorbing anchor rod system according to claim 4, wherein the outer anchoring end (1) is in threaded connection with the axial tie (7) of the constant-resistance energy-absorbing member (2) located at the head, one end of the anchor rod (3) is in threaded connection with the axial tie (7) of the adjacent constant-resistance energy-absorbing member (2), the other end of the anchor rod is in threaded connection with the cover plate II (9) of the next section of constant-resistance energy-absorbing member (2), and the anchor rod (3) located at the tail is in threaded connection with the inner anchoring end (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221016867.2U CN217028974U (en) | 2022-04-28 | 2022-04-28 | Series combined energy-absorbing anchor rod system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221016867.2U CN217028974U (en) | 2022-04-28 | 2022-04-28 | Series combined energy-absorbing anchor rod system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217028974U true CN217028974U (en) | 2022-07-22 |
Family
ID=82419649
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221016867.2U Expired - Fee Related CN217028974U (en) | 2022-04-28 | 2022-04-28 | Series combined energy-absorbing anchor rod system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217028974U (en) |
-
2022
- 2022-04-28 CN CN202221016867.2U patent/CN217028974U/en not_active Expired - Fee Related
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220722 |
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| CF01 | Termination of patent right due to non-payment of annual fee |