CN111022096B - Multistage stress and displacement control extensible anchor rod - Google Patents
Multistage stress and displacement control extensible anchor rod Download PDFInfo
- Publication number
- CN111022096B CN111022096B CN201911260383.5A CN201911260383A CN111022096B CN 111022096 B CN111022096 B CN 111022096B CN 201911260383 A CN201911260383 A CN 201911260383A CN 111022096 B CN111022096 B CN 111022096B
- Authority
- CN
- China
- Prior art keywords
- anchor rod
- stress
- sleeve
- displacement control
- telescopic cylinder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000006073 displacement reaction Methods 0.000 title claims abstract description 34
- 239000002689 soil Substances 0.000 claims abstract description 26
- 229910000831 Steel Inorganic materials 0.000 claims description 12
- 239000010959 steel Substances 0.000 claims description 12
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 230000007547 defect Effects 0.000 abstract description 3
- 239000011435 rock Substances 0.000 description 7
- 229920001971 elastomer Polymers 0.000 description 5
- 239000000806 elastomer Substances 0.000 description 5
- 238000004873 anchoring Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/0026—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention provides a multistage stress and displacement control extensible anchor rod, which can effectively overcome the defects that a rigid anchor rod in the prior art cannot adapt to the displacement and stress control of a rock-soil body in a large range, and a self-telescopic large-deformation anchor rod in the background art cannot control a slope in a grading manner, mainly adopts elastic control, and has insufficient adaptability to the subsequent stress increase or deformation control change of the actual rock-soil body. The technical scheme for solving the problem is that the device comprises a sleeve, wherein the sleeve comprises a plurality of sections of pipe bodies which are arranged at intervals, the lower end of the pipe body at the lowest end is connected with a base, a tray is fixed at the upper end of the pipe body at the uppermost end, and a stressed elastic body and a specific yield stress tensile body are connected between the circumferential end surfaces of every two adjacent pipe bodies.
Description
Technical Field
The invention relates to an anchor rod, in particular to an extensible anchor rod with multistage stress and displacement control.
Background
The anchor rod is widely applied to geotechnical engineering, and the anchor rod reinforcement is commonly used in projects such as side slopes, foundation pits, tunnels, roadways, urban underground spaces and the like, and is also commonly used in underground deep mines and energy mining. The anchor rod can actively reinforce the rock-soil body, can give full play to the self stability of the rock-soil body, effectively control the deformation of the rock-soil body, furthest keep the integrity of the surrounding rock and prevent the overall collapse and damage of the rock-soil body. Meanwhile, the anchor rod has the important characteristics of less damage to the original rock-soil body, small disturbance, easy construction, economy, safety and environmental protection.
Under the high stress condition of surrounding rocks, particularly in soft rock areas, the large deformation characteristic is often shown under the action of external loading and unloading load, vibration impact and the like. Most of the anchor rods in the prior art directly anchor one end of each anchor rod at the bottom of each anchor hole, and the other end of each anchor rod is anchored on the outer side face of each side slope. The anchor rod has smaller ultimate stretching length, and when the surrounding rock is greatly deformed, the common anchor rod cannot meet the requirements of engineering safety to adapt to the larger deformation of the surrounding rock, so that the phenomena of anchor head failure, anchor rod breakage and the like are frequently caused, the anchoring effect of the anchor rod is lost, and further engineering accidents are caused.
The utility model discloses a from flexible big deformation stock, patent number is 201621376559.5, and the flexible volume of stock of this patent is L, and its deflection is mainly undertaken by spring and stock two parts, and this kind of structure makes this utility model mainly exist following not enoughly: firstly, if the load bearing or load increase occurs in the actual engineering, and the allowable deformation amount is smaller, it becomes difficult to continue to increase the load bearing capacity of the anchor rod under such working conditions, for example, it is extremely difficult to replace or increase the strength of the spring 4, just as in paragraph 0014, the anchor rod and the piston are in an integral structure. Secondly, if in actual engineering, because the bearing or load increase, and the deformation that has allowed is great, because the bearing capacity maximum value of stock is certain under this kind of operating mode, when the deformation that allows is greater than the stock maximum deformation of original design, if again increase spring 4 maximum elongation is equally difficult, just as in 0014 section the stock and piston are integrative structure.
Disclosure of Invention
In view of the above situation, in order to overcome the defects of the prior art, the invention provides a multistage stress and displacement control extensible anchor rod, which can effectively overcome the defects that a rigid anchor rod in the prior art cannot adapt to the displacement and stress control of a rock-soil body in a large range, and a self-telescopic large-deformation anchor rod in the background art cannot perform grading control on a side slope, mainly adopts elastic control, and has insufficient adaptability to the subsequent stress increase or deformation control change of the actual rock-soil body.
The technical scheme for solving the problem is that the device comprises a sleeve, wherein the sleeve comprises a plurality of sections of pipe bodies which are arranged at intervals, the lower end of the pipe body at the lowest end is connected with a base, a tray is fixed at the upper end of the pipe body at the uppermost end, and a stressed elastic body and a specific yield stress tensile body are connected between the circumferential end surfaces of every two adjacent pipe bodies.
Preferably, the number of the stressed elastic bodies and the specific yield stress stretching-resistant body are both multiple.
Preferably, the number of the stressed elastic bodies is the same as that of the specific yielding tensile bodies, the specific yielding tensile bodies are uniformly arranged between the two pipe bodies at intervals, and the stressed elastic bodies are sleeved on the specific yielding tensile bodies.
Preferably, the stressed elastomer is sleeved with a sleeve at intervals.
Preferably, a first telescopic cylinder is sleeved outside the stress elastic body at intervals, and two ends of the first telescopic cylinder are connected between two adjacent pipe bodies.
Preferably, the pipe joint further comprises a second telescopic cylinder, the second telescopic cylinder is connected between two adjacent pipe bodies, and the stressed elastic body and the specific yielding stress tensile body are both arranged in the second telescopic cylinder.
Preferably, a through hole is formed in the center of the tray, a screw rod which is arranged in the sleeve and coaxial with the sleeve is fixed on the base, the other end of the screw rod penetrates out of the through hole, and a nut is screwed on the penetrating part of the screw rod.
Preferably, a compression backing plate is sleeved on the screw rod between the nut and the tray.
Preferably, a centering support is fixed in the pipe body, a central hole coaxial with the sleeve is formed in the center of the centering support, and the screw penetrates through the central hole of the centering support.
Preferably, the stressed elastic body is a spring, and the specific yielding tensile body is a steel strand.
The invention can allow the rock-soil mass to be reinforced to have a certain deformation amount, can set a certain limit value for the displacement of the rock-soil mass to be reinforced, changes the stress state of the rock-soil mass through the anchoring effect so as to realize the displacement control of the rock-soil mass, and allows the rock-soil mass to generate a certain displacement amount value within the engineering safety allowable range when the stress borne by the anchor rod body exceeds a certain designed value. The invention can form a sleeve by a plurality of pipe bodies, carry out first-level two-stage control on a rock-soil body to be reinforced by the stressed elastic bodies and the specific yielding tensile bodies between two adjacent pipe bodies, carry out second-level multi-stage control by the difference of the yield stress of the specific yielding tensile bodies in the multi-section first-level control, and carry out third-level multi-stage control by setting the distance between the nuts and the trays so as to control the maximum displacement of the rock-soil body to be reinforced.
Drawings
FIG. 1 is a front view of the present invention.
Fig. 2 is a front view of the present invention.
Fig. 3 is a perspective view of the view of fig. 2.
Fig. 4 is an enlarged view of a portion B in fig. 3.
Fig. 5 is a cutaway perspective view of the view of fig. 2.
Fig. 6 is a front view of the present invention with the sleeve added.
Fig. 7 is a perspective view of the present invention with a first telescoping cylinder added.
Fig. 8 is a perspective sectional view of the present invention with a first telescopic cylinder added.
Fig. 9 is a perspective sectional view of the inner structure of the first telescopic cylinder in fig. 8.
Fig. 10 is a perspective view of the present invention with a second telescoping cylinder added.
Fig. 11 is a perspective sectional view of the present invention with a second telescoping cylinder added.
Fig. 12 is a sectional view of a first telescopic cylinder of the present invention.
Fig. 13 is a sectional view of a second telescopic cylinder of the present invention.
Fig. 14 is a perspective view of a centering bracket of the present invention.
Fig. 15 is a cross-sectional view of the invention installed in an anchor hole.
Detailed Description
The following description of the embodiments of the present invention will be made in detail with reference to the accompanying drawings 1 to 15.
The technical scheme includes that the sleeve 1 comprises a plurality of sections of pipe bodies 2 which are arranged at intervals, a base 3 is connected to the bottom end of the pipe body 2 at the lowest end, a tray 4 is fixed to the top end of the pipe body 2 at the highest end, and a stressed elastic body 5 and a specific yield stress tensile body 6 are connected between the circumferential end faces of every two adjacent pipe bodies 2.
When the embodiment is used, as shown in fig. 1 to 5, because there are a plurality of pipe bodies 2, there are also a plurality of intervals between the plurality of pipe bodies 2, a displacement control part is arranged between every two pipe bodies 2, the displacement control part comprises a stressed elastic body 5 and a specific yield tensile body 6, the yield strength of the specific yield tensile body 6 in each layer of the displacement control part is different, and preferably, the yield strength of the specific yield tensile body 6 from bottom to top is gradually increased. The stressed elastic body 5 can be a spring, and the specific yielding stretching-resistant body 6 can be a steel strand. When the reinforcing device is used specifically, slurry is injected among the base 3, the bottom of the sleeve 1 and the anchor hole 7 to enable the lower portion of the sleeve to be anchored, and the side face of the tray 4 at the moment is attached to a rock-soil body to be reinforced. When the rock and soil mass to be reinforced has a smaller displacement trend, the specific yielding tension-resistant body 6 generates stress through the tray 4, and when the specific yielding tension-resistant body 6 does not reach the yield strength, the displacement of the whole rock and soil mass to be reinforced under the control of the anchor rod is extremely small; when the stress borne by the anchor rod continues to increase, the specific yielding tension resistant body 6 with the minimum yield strength reaches the yield strength, the specific yielding tension resistant body 6 reaching the yield strength fails, the stressed elastic body 5 matched with the failed specific yielding tension resistant body 6 starts to work, and the displacement deformation of the rock-soil body to be reinforced is controlled through the elastic tension of the stressed elastic body. When the stress continues to increase, the specific yielding tensile body 6 with the second level of yield strength reaches a yielding state, the specific yielding tensile body 6 with the second level of yield strength fails, and the stressed elastic body 5 matched with the specific yielding tensile body controls the displacement deformation amount of the rock-soil body to be reinforced through the tensile force of the stressed elastic body. And when the displacement of the added rock-soil mass continues to increase, the next-level displacement control component continues to work. By means of design, when the total range of the stressed elastic body of the previous level reaches 30%, the specific yielding stress tensile body 6 of the next level reaches the yield strength and fails successively.
In the embodiment 1, two-stage displacement control is performed through the specific yielding stress tensile body 6 and the stress elastic body 5 in each layer of displacement control component, and multi-stage displacement control is performed through the multi-stage displacement control component.
Example 2, on the basis of example 1, the number of the stressed elastic bodies 5 and the specific yield stress tensile body 6 are both multiple. The number of the stress elastic bodies 5 and the specific yield stress tensile bodies 6 can be more than three, and the stress elastic bodies and the specific yield stress tensile bodies are evenly distributed between the two pipe bodies 2 at intervals on the circumference.
Example 3, on the basis of example 2, the number of the stressed elastic bodies 5 is the same as that of the specific yielding tensile bodies 6, the specific yielding tensile bodies 6 are uniformly arranged between the two pipe bodies 2 at intervals, and the stressed elastic bodies 5 are sleeved on the specific yielding tensile bodies 6. The stress elastic body 5 is sleeved on the specific yield stress tensile body 6, so that the space between the pipe bodies 2 is saved, and the design is more regular.
Example 4, on the basis of example 3, the stressed elastomer 5 is sleeved with a sleeve 8 at an interval.
As shown in fig. 6, the upper and lower ends of the sleeve 8 can be welded to the upper and lower pipes 2 by spot welding, and when the stress is large, the upper and lower multiple spot welding is broken first, and then the multi-stage specific yield tensile member 6 reaches the yield strength and fails. This allows the bushing 1 to protect the stressed elastomer 5 and the specific yield tensile member 6 within the bushing 1 during installation.
Example 5, on the basis of example 3, as shown in fig. 7, 8, 9 and 12, a first telescopic cylinder 9 is sleeved outside the stressed elastic body 5 at an interval, and two ends of the first telescopic cylinder 9 are connected between two adjacent pipe bodies 2.
In this embodiment, the first telescopic cylinder 9 is sleeved on the stressed elastic body 5, so that the stressed elastic body 5 and the specific yield stress tensile body 6 are protected. And the first telescopic cylinder 9 has the elasticity, and does not influence the work of the stressed elastic body 5 and the specific yielding stress tensile body 6. The first telescopic cylinder 9 is composed of a large telescopic cylinder and a small telescopic cylinder which is arranged in the large telescopic cylinder in a sliding and penetrating mode.
Example 6, on the basis of example 3, as shown in fig. 10, 11 and 13, a second telescopic tube 10 is further included, the second telescopic tube 10 is connected between two adjacent tubes 2, and both the stressed elastomer 5 and the specific yield tensile resistance body 6 are disposed in the second telescopic tube 10. The second telescopic cylinder 10 is composed of a large telescopic cylinder and a small telescopic cylinder which is slidably arranged in the large telescopic cylinder in a penetrating mode, the upper portion of the small telescopic cylinder is fixedly sleeved on the outer circular surface of the corresponding pipe body, the lower end of the large telescopic cylinder is connected with a connecting ring 11 which extends inwards, and the inner circular surface of the connecting ring 11 is fixedly sleeved on the outer circular surface of the corresponding pipe body.
In the embodiment, all the stressed elastic bodies 5 and the specific yielding tension-resistant bodies 6 between two connected pipe bodies 2 are arranged in the same large telescopic cylinder, and the telescopic cylinder can protect the stressed elastic bodies 5 and the specific yielding tension-resistant bodies 6 without influencing the work of the two.
Embodiment 7 is that, on the basis of any of embodiments 1 to 6, a through hole is provided in the center of the tray 4, a screw 12 coaxially disposed in the sleeve 1 and the sleeve 1 is fixed on the base 3, the other end of the screw 12 passes through the through hole, and a nut 13 is screwed on the passing-out portion of the screw 12.
In the embodiment, a screw 12 is fixed on the center of a base 3, through holes are extended from the upper end of the screw 12 at intervals, a nut 13 is screwed on the screw 12, a certain distance is set between the nut 13 and a tray 4 during initial setting, after the multistage displacement control component works, if the maximum deformation allowed by a side slope is reached, the nut 13 contacts the tray 4 at the moment, active control is carried out on a rock-soil body to be reinforced by the rigid screw 12, the screw 12 at the moment is equivalent to a rigid anchor rod in the background technology, and after the screw 12 and the nut 13 are added, one-stage control is added for controlling the deformation and the stress of the rock-soil body to be reinforced. And the displacement of the slope is controlled within a controllable range by controlling the interval between the nut 13 and the tray 4. The screw rod in the invention can be replaced by a steel strand. And the extending end at the upper end of the steel strand is matched with the nut in a threaded manner. The maximum displacement deformation amount allowed by the required reinforced rock-soil body can be adjusted through the nut.
In this embodiment, a pressure pad 14 is added, and the pressure pad 14 is added between the nut 13 and the tray 4, so that the nut 13 is pressed on the pressure pad 14 first and is pressed on the tray 4 through the pressure pad 14, thereby protecting the tray 4.
The bracket 15 is centered so that the bolt is centered in the sleeve 1 and serves to stabilize and support the screw 12 and prevent the screw 12 from shifting. The screw rod and the centering bracket can slide.
Example 10, based on any of examples 1-6, 8 or 9, the stressed elastomer 5 is a spring and the specific yield tensile member 6 is a steel strand.
Claims (8)
1. The extensible anchor rod is characterized by comprising a sleeve (1), wherein the sleeve (1) comprises a plurality of sections of pipe bodies (2) which are arranged at intervals, the lower end of the pipe body (2) at the lowest end is connected with a base (3), a tray (4) is fixed at the upper end of the pipe body (2) at the highest end, and a spring and a steel strand are connected between the circumferential end surfaces of every two adjacent pipe bodies (2);
the number of the springs and the number of the steel strands are both multiple;
the yield strength of the steel strand from bottom to top is gradually increased;
the side surface of the tray (4) is attached to the rock-soil body to be reinforced.
2. The multi-stage stress and displacement control extensible anchor rod according to claim 1, wherein the number of the springs is the same as that of the steel strands, the steel strands are evenly spaced between the two pipe bodies (2), and the springs are sleeved on the steel strands.
3. The multi-stage stress and displacement control extensible anchor rod as claimed in claim 2, wherein the spring is sleeved with a sleeve (8) at intervals.
4. The multi-stage stress and displacement control extensible anchor rod as claimed in claim 2, wherein a first telescopic cylinder (9) is sleeved outside the spring at intervals, and two ends of the first telescopic cylinder (9) are connected between two adjacent pipe bodies (2).
5. The multi-stage stress and displacement control extensible anchor rod according to claim 2, further comprising a second telescopic cylinder (10), wherein the second telescopic cylinder (10) is connected between two adjacent pipe bodies (2), and the spring and the steel strand are arranged in the second telescopic cylinder (10).
6. The multi-stage stress and displacement control extensible anchor rod according to any one of claims 1 to 5, wherein a through hole is formed in the geometric center of the tray (4), a screw rod (12) which is arranged in the sleeve (1) and coaxial with the sleeve (1) is fixed on the base (3), the other end of the screw rod (12) penetrates out of the through hole, and a nut (13) is screwed on the penetrating part of the screw rod (12).
7. The multi-stage stress and displacement control extensible anchor rod according to claim 6, wherein a compression cushion plate (14) is sleeved on the screw rod (12) between the nut (13) and the tray (4).
8. The multi-stage stress and displacement control extensible anchor rod is characterized in that a centering bracket (15) is fixed in the tube body (2), a central hole coaxial with the sleeve (1) is formed in the center of the centering bracket (15), and the screw rod (12) penetrates through the central hole of the centering bracket (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911260383.5A CN111022096B (en) | 2019-12-10 | 2019-12-10 | Multistage stress and displacement control extensible anchor rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911260383.5A CN111022096B (en) | 2019-12-10 | 2019-12-10 | Multistage stress and displacement control extensible anchor rod |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111022096A CN111022096A (en) | 2020-04-17 |
| CN111022096B true CN111022096B (en) | 2021-08-24 |
Family
ID=70208642
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911260383.5A Active CN111022096B (en) | 2019-12-10 | 2019-12-10 | Multistage stress and displacement control extensible anchor rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111022096B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2198205A (en) * | 1985-10-21 | 1988-06-08 | Scott Invest Partners | A dual stage dynamic rock stabilizing fixture and method of anchoring the fixture in rock formations |
| CN2296366Y (en) * | 1997-01-23 | 1998-11-04 | 北京市第三城市建设工程公司 | Line holding type reclaimable rockbolt |
| US5882148A (en) * | 1997-02-07 | 1999-03-16 | Dm Technologies Ltd. | Apparatus for yielding support of rock |
| CN104373145A (en) * | 2014-11-04 | 2015-02-25 | 中国矿业大学 | Anchor device with functions of embedding, constant-resistance classifying, shear resisting and large deforming and method |
| CN106759326A (en) * | 2016-12-14 | 2017-05-31 | 重庆大学 | A kind of Stress Control multistage opening type anchor pole and anchoring construction method |
| CN207004554U (en) * | 2017-08-02 | 2018-02-13 | 中铁十四局集团第二工程有限公司 | A kind of multistage allows pressure grouting anchor pole |
| CN208310824U (en) * | 2018-05-17 | 2019-01-01 | 中交第一公路勘察设计研究院有限公司 | It is a kind of to increase the resistance long anchor structure of Extensible type suitable for the multistage of large deformation tunnel |
| CN208396733U (en) * | 2018-07-04 | 2019-01-18 | 湖南科技大学 | A kind of scalable anchor pole for deep roadway with large deformation |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2008202980A1 (en) * | 2007-07-04 | 2009-01-22 | Fero Group Pty Ltd | Yielding rock bolt |
| MX350675B (en) * | 2013-07-12 | 2017-09-12 | Minova Int Ltd | Yieldable rock anchor. |
| CN206397530U (en) * | 2016-12-14 | 2017-08-11 | 重庆大学 | A kind of self extending large deformation anchor rod |
| CN106968696B (en) * | 2017-04-21 | 2019-02-19 | 中国矿业大学 | A kind of anchor pole washer to change colour at various pressures and its application method |
-
2019
- 2019-12-10 CN CN201911260383.5A patent/CN111022096B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2198205A (en) * | 1985-10-21 | 1988-06-08 | Scott Invest Partners | A dual stage dynamic rock stabilizing fixture and method of anchoring the fixture in rock formations |
| CN2296366Y (en) * | 1997-01-23 | 1998-11-04 | 北京市第三城市建设工程公司 | Line holding type reclaimable rockbolt |
| US5882148A (en) * | 1997-02-07 | 1999-03-16 | Dm Technologies Ltd. | Apparatus for yielding support of rock |
| CN104373145A (en) * | 2014-11-04 | 2015-02-25 | 中国矿业大学 | Anchor device with functions of embedding, constant-resistance classifying, shear resisting and large deforming and method |
| CN106759326A (en) * | 2016-12-14 | 2017-05-31 | 重庆大学 | A kind of Stress Control multistage opening type anchor pole and anchoring construction method |
| CN207004554U (en) * | 2017-08-02 | 2018-02-13 | 中铁十四局集团第二工程有限公司 | A kind of multistage allows pressure grouting anchor pole |
| CN208310824U (en) * | 2018-05-17 | 2019-01-01 | 中交第一公路勘察设计研究院有限公司 | It is a kind of to increase the resistance long anchor structure of Extensible type suitable for the multistage of large deformation tunnel |
| CN208396733U (en) * | 2018-07-04 | 2019-01-18 | 湖南科技大学 | A kind of scalable anchor pole for deep roadway with large deformation |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111022096A (en) | 2020-04-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110924388B (en) | Multistage stress and displacement control extensible anchor rod with stress displacement monitoring device | |
| CN110924389B (en) | Anchor rod capable of controlling multistage stress and displacement in extension and monitoring acoustic emission | |
| CN110926538B (en) | Can monitor extendible stock device of multistage stress displacement control of warm and humid water pressure | |
| AU2016365489B2 (en) | A sectional modular large-deformation-resistant impact-resistant composite rock bolt and its assembling method | |
| CN110925003B (en) | Extensible anchor rod with multistage stress and displacement control and multifunctional intelligent monitoring device | |
| CN103321660B (en) | Mining constant-resistance yielding energy-absorbing impact-resisting supporting device | |
| CN103573279A (en) | Mining telescopic energy adsorption anti-impact viscous damping anchor rod and supporting method thereof | |
| CN110966030B (en) | Extensible anchor rod and recoverable anchor rod device with multistage stress and displacement control | |
| CN203669901U (en) | Mining telescopic energy absorption and scour prevention viscous damping anchor rod | |
| CN202718693U (en) | Ring-shaped pressure-buffering shock-absorbing device for support of anchor stock or anchor cable | |
| CN111894643A (en) | Constant-resistance body and constant-resistance sleeve assembly and NPR anchor rod/cable | |
| AU2015228395B2 (en) | Load compensator having tension spring assemblies contained in a tubular housing | |
| CN112177648B (en) | Novel anti-shearing large-deformation energy-absorbing anchor rod | |
| CN113250723A (en) | Monitoring and coupling integrated protection device for rock burst of deep mine | |
| CN113074007B (en) | Anti-impact energy absorber for hydraulic support | |
| CN106639456A (en) | Back pressure disc-shaped spring damper with adjustable rigidity | |
| CN111022096B (en) | Multistage stress and displacement control extensible anchor rod | |
| CN109057843B (en) | High-elongation impact-resistant anchor rod of anchoring section and anchoring method thereof | |
| CN106437262A (en) | Disc-shaped spring damper with rigidity capable of being preset | |
| CN113481981A (en) | Multistage buffering composite pile with radial allowance | |
| CN213540446U (en) | Buffering lets pressure type stock tray | |
| US7096958B2 (en) | Compliant buoyancy can guide | |
| CN113479739A (en) | Elevator system and vibration isolator thereof | |
| KR102503249B1 (en) | Active Rockfall Protection Fence with Damping of Hollow Elastic Body | |
| CN218027887U (en) | Load stabilizing device for horizontal load test of plastic deformation pile foundation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |