CN213205717U - Energy-absorbing anchor rod with double buffering structures - Google Patents
Energy-absorbing anchor rod with double buffering structures Download PDFInfo
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- CN213205717U CN213205717U CN202022331248.XU CN202022331248U CN213205717U CN 213205717 U CN213205717 U CN 213205717U CN 202022331248 U CN202022331248 U CN 202022331248U CN 213205717 U CN213205717 U CN 213205717U
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Abstract
The utility model discloses an energy-absorbing anchor rod with double buffer structures, including the body of rod and the external setting mechanism that is used for making the body of rod and country rock form the anchor and be connected, the energy-absorbing anchor rod with double buffer structures still includes sleeve, base and elastic component, the body of rod includes the anchor section straight-bar that connects gradually from front to back, energy-absorbing section bending beam and buffering section straight-bar, the front end of anchor section straight-bar is fixed with the shell anchor head that rises, the afterbody of buffering section straight-bar can the back-and-forth movement through the elastic component and set up in the sleeve, the sleeve is fixed in the front end of base, the external setting mechanism is connected at the afterbody; the device has the advantages that the device is suitable for large deformation of surrounding rocks of underground engineering, particularly deep rock mass engineering, can coordinate deformation with the surrounding rocks through self deformation, has better supporting function and higher bearing capacity, and is simple in structure, safe, reliable, convenient to assemble, easy to operate and low in cost.
Description
Technical Field
The utility model relates to an anchor rod especially involves an energy-absorbing anchor rod with two buffer structure.
Background
With the continuous development of underground engineering, more and more engineering problems emerge, and especially special rock masses represented by high energy storage rock masses bring great threats to the life safety of constructors and the progress of engineering. The strain energy of the inside accumulation of high energy storage rock mass can release in the short time after the excavation, causes geological disasters such as rock burst, soft rock large deformation, for control surrounding rock stability, generally can use the stock to strut, the stock is strutted and is meant to be gone into the surrounding rock with the stock anchor, makes to form a whole and stable rock area around the tunnel, in order to reach the body of rod and surrounding rock common work purpose, but the deformation coordination ability of traditional stock and surrounding rock is relatively poor, yields easily to the strain increase, loses its shoring effect.
At present, most of support anchor rods for high-energy-storage large-deformation rock bodies are constant-resistance large-deformation anchor rods, and the support anchor rods have the defects that the strength of sleeves is lower than the strength of anchor rods, the bearing capacity is lower, the mechanical properties of the support anchor rods cannot be well exerted under impact load, and the waste of economy and resources is caused. Therefore, an energy-absorbing anchor rod which is more suitable for high energy storage rock mass regions and is easier to coordinate and strain between surrounding rocks needs to be provided so as to solve the construction problem in the underground engineering.
Disclosure of Invention
The utility model discloses a main aim at provides an energy-absorbing stock with two buffer structure, its surrounding rock that is adapted to underground works especially deep rock mass engineering warp the condition greatly, can coordinate and the deformation between the surrounding rock through the deformation of self, has better supporting effect and higher bearing capacity, simple structure, safe and reliable, convenient assembling, easy operation, low cost.
In order to achieve the above purpose, the utility model adopts the technical scheme that: the utility model provides an energy-absorbing stock with two buffer structure, includes the body of rod and is used for making the body of rod and country rock form the outer fixed establishment of anchor connection, energy-absorbing stock with two buffer structure still include sleeve, base and elastic component, the body of rod include by preceding anchor section straight-bar, the crooked pole of energy-absorbing section and the buffer section straight-bar that connects gradually after to, the front end of anchor section straight-bar be fixed with and rise shell anchor head, the afterbody of buffer section straight-bar pass through elastic component ability back-and-forth movement setting be in the sleeve in, the sleeve fix the front end of base, outer fixed establishment connect the afterbody of base.
The tail of the base is fixed with a screw, the external fixing mechanism comprises a base plate and a nut, the nut is screwed on the screw, and the base plate penetrates through the screw and is located between the base and the nut. In the structure, when the anchor rod is installed, a rock drilling machine is firstly used for drilling holes in surrounding rocks, drilling is carried out according to the designed depth, cooling water needs to be injected during drilling, the drilling machine is disassembled after the drilling is finished, the anchor rod is plugged into the drilling holes and then is injected inwards, grouting is stopped when the grouting is full or the pressure of grout reaches the designed value, and finally, a base plate and a nut are installed, so that the anchor rod can be firmly fixed on a rock wall.
A rubber pad is arranged between the base and the backing plate. In this structure, the setting of rubber pad plays the effect of shock attenuation buffering.
The anchoring section straight rod, the energy absorption section bent rod, the buffering section straight rod and the outer side wall of the sleeve are respectively provided with external threads, and the inner side wall of the sleeve is provided with internal threads. Thereby increasing the friction to increase the deformation process.
The elastic piece is a spring, one end of the spring is connected to the bottom of the sleeve, and the other end of the spring is connected to the straight rod of the buffer section. In the structure, the spring material is made of oil quenching-tempering spring steel wires 60Si2mNA, so that the excellent tensile property and the adaptability of coordinating large deformation of the spring material are ensured.
The diameter of the anchoring section straight rod and the diameter of the buffering section straight rod are both D, the length of the anchoring section straight rod and the length of the buffering section straight rod are 14-17D, the outer diameter of the sleeve is 1.4-1.7D, the inner diameter of the sleeve is 1.1D, and the length of the sleeve is 14-17D. The energy absorption section bending rod buffering structure has the advantages that the assembly effect is better, and longer buffering length can be provided for the energy absorption section bending rod.
The outer diameter of the elastic part is 0.9-1.0D, the diameter of the spring wire of the elastic part is 0.1-0.3D, and the free height of the elastic part is 8-10D.
The shell-expanding anchor head and the sleeve are respectively made of steel materials, and the rod body is made of HRB 500. From this guarantee overall structure's reliability, difficult emergence wearing and tearing, wherein, the sleeve material can not be than the intensity height of body of rod material to make body of rod itself impaired in the buffering process, be difficult to exert original tensile properties.
Compared with the prior art, the utility model has the advantages of: the rod body forms an integral structure through the external fixing mechanism, the grouting body and the surrounding rock, and the integral structure bears the stress of the surrounding rock and coordinates the deformation of the surrounding rock after excavation; the double-buffering structure of the anchor rod has a great effect on coping with large deformation of a high energy storage rock body after unloading, wherein the first-stage buffering is completed by a buffering-section straight rod, an elastic part and a sleeve, the buffering-section straight rod slowly slides out along the sleeve, meanwhile, the elastic part is slowly stretched under the action of tension, when the limit state is reached, the buffering-section straight rod can not be stretched, at the moment, the second-buffering-section structure plays a role, namely, the energy-absorbing-section bending rod slowly straightens under the action of tensile stress, when the bending rod is completely straightened, the two-part buffering-section structure can not play a buffering role, and the surrounding rock pressure is completely borne by the tensile strength of the material; the utility model discloses the effectual great stock of deformation after having solved among the civil engineering especially underground works country rock off-load warp with the country rock deformation discordance lead to the easy difficult problem of destroying of stock, increased the life of stock, reduced the quantity of stock design, practiced thrift economic cost greatly, guaranteed construction safety simultaneously.
Drawings
FIG. 1 is a schematic structural view of the working state of the present invention;
fig. 2 is a schematic structural diagram of the present invention;
fig. 3 is a top view of the present invention;
fig. 4 is a bottom view of the present invention.
Detailed Description
The invention is described in further detail below with reference to the embodiments of the drawings.
Example (b): as shown in the figure, an energy-absorbing stock with two buffer structure, including the body of rod 1 and be used for making the body of rod 1 and country rock form the outer fixed establishment 2 that the anchor is connected, the energy-absorbing stock with two buffer structure still includes sleeve 3, base 5 and elastic component 4, body of rod 1 includes by preceding anchor section straight-bar 11 that connects gradually after to, energy-absorbing section crooked pole 12 and buffer section straight-bar 13, the front end of anchor section straight-bar 11 is fixed with shell anchor head 6 that rises, buffer section straight-bar 13's afterbody passes through elastic component 4 can the back-and-forth movement setting in sleeve 3, sleeve 3 fixes the front end at base 5, outer fixed establishment 2 connects the afterbody at base 5.
A screw 51 is fixed at the tail of the base 5, the external fixing mechanism 2 comprises a backing plate 21 and a nut 22, the nut 22 is screwed on the screw 51, and the backing plate 21 is arranged on the screw 51 in a penetrating way and is positioned between the base 5 and the nut 22. In the structure, when the anchor rod is installed, a rock drilling machine is firstly used for drilling holes in surrounding rocks, drilling is carried out according to the designed depth, cooling water needs to be injected during drilling, the drilling machine is detached after the drilling is finished, the anchor rod is plugged into the drilling holes and then is injected inwards, the grouting is stopped when the grouting is full or the pressure of grout reaches the designed value, and finally, the base plate 21 and the nut 22 are installed, so that the anchor rod can be firmly fixed on a rock wall.
A rubber pad 23 is also provided between the base 5 and the backing plate 21. In this structure, the rubber pad 23 is provided to perform a shock absorbing and buffering function.
The outer side walls of the anchoring section straight rod 11, the energy absorption section bent rod 12, the buffering section straight rod 13 and the sleeve 3 are respectively provided with external threads, and the inner side wall of the sleeve 3 is provided with internal threads. Thereby increasing the friction to increase the deformation process.
The elastic part 4 is a spring, one end of the spring is connected to the bottom of the sleeve 3, and the other end of the spring is connected to the straight rod 13 of the buffer section. In the structure, the spring material is made of oil quenching-tempering spring steel wires 60Si2mNA, so that the excellent tensile property and the adaptability of coordinating large deformation of the spring material are ensured.
The diameters of the straight rod 11 of the anchoring section and the straight rod 13 of the buffering section are both D, the lengths of the straight rod 11 of the anchoring section and the straight rod 13 of the buffering section are 14-17D, the outer diameter of the sleeve 3 is 1.4-1.7D, the inner diameter of the sleeve 3 is 1.1D, and the length of the sleeve 3 is 14-17D. The advantage is that the assembly effect is better, also can provide longer buffer length for energy-absorbing section bending rod 12.
Specifically, the diameter of the anchor section straight rod 11 and the diameter of the buffer section straight rod 13 are both 32mm, the length of the anchor section straight rod 11 and the length of the buffer section straight rod 13 are 0.5m, the outer diameter of the sleeve 3 is 48mm, the inner diameter of the sleeve 3 is 35.2mm, and the length of the sleeve 3 is 0.5 m.
The outer diameter of the elastic part 4 is 0.9-1.0D, the diameter of the spring wire of the elastic part 4 is 0.1-0.3D, and the free height of the elastic part 4 is 8-10D. In this configuration, D =32 mm.
The total length of the energy-absorbing section bent rod 12 is L (in an unstretched state), the curvature radius of each section of arc of the energy-absorbing section bent rod 12 is 1/4L, and the chord length of each section of arc is 1/5L.
The shell-expanding anchor head 6 and the sleeve 3 are respectively made of steel materials, and the rod body 1 is made of HRB 500. From this guarantee overall structure's reliability, difficult emergence wearing and tearing, wherein, the intensity that 3 materials of sleeve can not be than the body of rod 1 material is high to make body of rod 1 itself impaired in the buffer process, be difficult to exert original tensile properties.
After the cavern is excavated, the strain energy of the surrounding rock needs to be released, particularly in soft rock areas, and the release of the strain energy is accompanied by the increase of the strain rate of the rock. Under this condition, this device carries out the deformation coordination through two buffer structure, first buffer segment structure plays the effect earlier, buffer segment straight-bar 13 slowly outwards rolls off along the sleeve 3 that the internal surface has the screw thread, the spring is tensile slowly under tension effect simultaneously, when reaching extreme condition, buffer segment straight-bar 13 can not extend again, second buffer segment structure play a role this moment, energy-absorbing section crooked pole 12 slowly straightens under the tensile stress effect promptly, when waiting for the crooked pole to straighten completely, two parts buffer segment structure can not play the cushioning effect again, the surrounding rock pressure is all born by the tensile strength of material.
The utility model discloses the effectual great stock of deformation after having solved among the civil engineering especially underground works country rock off-load warp with the country rock deformation discordance lead to the easy difficult problem of destroying of stock, increased the life of stock, reduced the quantity of stock design, practiced thrift economic cost greatly, guaranteed construction safety simultaneously.
It should be noted that the above-mentioned embodiments are only preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, and the present invention can also be modified in materials and structures, or replaced by technical equivalents. Therefore, all structural equivalents which may be made by applying the present invention to the specification and drawings, or by applying them directly or indirectly to other related technical fields, are intended to be encompassed by the present invention.
Claims (8)
1. The utility model provides an energy-absorbing stock with two buffer structure, includes the body of rod and is used for making the body of rod and country rock form the outer fixed establishment that the anchor is connected, its characterized in that: the energy-absorbing anchor rod with the double buffering structures further comprises a sleeve, a base and an elastic piece, wherein the rod body comprises an anchoring section straight rod, an energy-absorbing section bent rod and a buffering section straight rod which are sequentially connected from front to back, an expansion shell anchor head is fixed at the front end of the anchoring section straight rod, the tail of the buffering section straight rod can be arranged in the sleeve in a back-and-forth moving mode through the elastic piece, the sleeve is fixed at the front end of the base, and an external fixing mechanism is connected to the tail of the base.
2. An energy absorbing anchor having a double cushioning structure according to claim 1, wherein: the tail of the base is fixed with a screw, the external fixing mechanism comprises a base plate and a nut, the nut is screwed on the screw, and the base plate penetrates through the screw and is located between the base and the nut.
3. An energy absorbing anchor having a double cushioning structure according to claim 2, wherein: a rubber pad is arranged between the base and the backing plate.
4. An energy absorbing anchor having a double cushioning structure according to claim 1, wherein: the anchoring section straight rod, the energy absorption section bent rod, the buffering section straight rod and the outer side wall of the sleeve are respectively provided with external threads, and the inner side wall of the sleeve is provided with internal threads.
5. An energy absorbing anchor having a double cushioning structure according to claim 1, wherein: the elastic piece is a spring, one end of the spring is connected to the bottom of the sleeve, and the other end of the spring is connected to the straight rod of the buffer section.
6. An energy absorbing anchor having a double cushioning structure according to claim 5, wherein: the diameter of the anchoring section straight rod and the diameter of the buffering section straight rod are both D, the length of the anchoring section straight rod and the length of the buffering section straight rod are 14-17D, the outer diameter of the sleeve is 1.4-1.7D, the inner diameter of the sleeve is 1.1D, and the length of the sleeve is 14-17D.
7. An energy absorbing anchor having a double cushioning structure according to claim 6, wherein: the outer diameter of the elastic part is 0.9-1.0D, the diameter of the spring wire of the elastic part is 0.1-0.3D, and the free height of the elastic part is 8-10D.
8. An energy absorbing anchor having a double cushioning structure according to claim 1, wherein: the shell-expanding anchor head and the sleeve are respectively made of steel materials, and the rod body is made of HRB 500.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022331248.XU CN213205717U (en) | 2020-10-19 | 2020-10-19 | Energy-absorbing anchor rod with double buffering structures |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022331248.XU CN213205717U (en) | 2020-10-19 | 2020-10-19 | Energy-absorbing anchor rod with double buffering structures |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213205717U true CN213205717U (en) | 2021-05-14 |
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ID=75826275
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022331248.XU Expired - Fee Related CN213205717U (en) | 2020-10-19 | 2020-10-19 | Energy-absorbing anchor rod with double buffering structures |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213205717U (en) |
-
2020
- 2020-10-19 CN CN202022331248.XU patent/CN213205717U/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: 20210514 Termination date: 20211019 |
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| CF01 | Termination of patent right due to non-payment of annual fee |