CN211397620U - Recoverable expanding anchor rod - Google Patents
Recoverable expanding anchor rod Download PDFInfo
- Publication number
- CN211397620U CN211397620U CN201921462741.6U CN201921462741U CN211397620U CN 211397620 U CN211397620 U CN 211397620U CN 201921462741 U CN201921462741 U CN 201921462741U CN 211397620 U CN211397620 U CN 211397620U
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- Prior art keywords
- anchor rod
- anchor
- screw thread
- rod
- stock
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- Expired - Fee Related
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- 230000029058 respiratory gaseous exchange Effects 0.000 claims abstract description 23
- 238000010276 construction Methods 0.000 claims abstract description 15
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 4
- 239000010959 steel Substances 0.000 claims abstract description 4
- 238000009434 installation Methods 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 2
- 238000004873 anchoring Methods 0.000 abstract description 42
- 239000002689 soil Substances 0.000 abstract description 20
- 239000011435 rock Substances 0.000 abstract description 10
- 230000008901 benefit Effects 0.000 description 6
- 238000011084 recovery Methods 0.000 description 6
- 239000011148 porous material Substances 0.000 description 5
- 238000005553 drilling Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000008602 contraction Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000004570 mortar (masonry) Substances 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 238000007569 slipcasting Methods 0.000 description 3
- 239000004568 cement Substances 0.000 description 2
- 230000011218 segmentation Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The expansion anchor rod can be recovered. The anchor rod is a structural system for transmitting the pulling force to a stable rock stratum or a soil layer and mainly comprises an anchor head, a free section and an anchoring section. A recoverable expansion-contraction type anchor rod comprises: the anchor rod body (1), install a set of breathing device (2) on the anchor rod body, the anchor rod body adopts steel tube construction, and screw thread and stop nut or spacing ring (6) have been processed at anchor rod body surface interval, the breathing device, the screw thread section on the anchor rod body wall is installed through the screw thread to its one end articulated nut, there is stop nut or spacing ring department on the anchor rod body wall at the articulated spacing ring cover of other end, the breathing device is articulated continuous by two support arm one end, both ends articulate with a nut (3) and a ring (4) respectively in addition. The utility model discloses be applied to the construction field.
Description
The technical field is as follows:
the utility model relates to a recoverable expanding and contracting formula stock.
Background art:
geotechnical anchoring technology is almost spread throughout various fields of civil engineering, such as slopes, foundation pits, tunnels, dams, wharfs, ship locks, bridges and the like. The rock-soil anchoring technology is an engineering technology for embedding a pull rod piece into a stratum so as to improve the strength and self-stability of the rock-soil; the technology greatly reduces the dead weight of the structure, saves engineering materials, ensures the safety and stability of the engineering, and has obvious economic benefit and social benefit, thereby being widely applied to the engineering at present. The basic principle of rock-soil anchoring is that the shear strength of stratum rock-soil around the anchor rod is utilized to transmit the pulling force of a structure so as to keep the self stability of a stratum excavation surface, and the anchor rod can provide resistance force acting on the structure to bear external load due to the use of the anchor rod; the anchoring stratum can generate a compressive stress area and can reinforce the reinforcing stratum; the strength of the stratum can be enhanced, and the mechanical property of the stratum can be improved; the structure and the stratum can be interlocked together to form a combined body which can effectively bear the tensile force and the shearing force. In rock bolting, bolt and anchor line are commonly referred to collectively as bolt.
The anchor rod is a structural system for transmitting the pulling force to a stable rock stratum or a soil layer and mainly comprises an anchor head, a free section and an anchoring section.
The classification method of the anchor rod is more, and the anchor rod can be divided into a rock anchor rod and a soil anchor rod according to application objects; dividing the pre-stressed anchor rod into a pre-stressed anchor rod and a non-pre-stressed anchor rod according to whether stress is applied in advance; the anchor rod is divided into a cylindrical anchor rod, an end-expanding anchor rod and a continuous spherical anchor rod according to the anchoring form. In addition, the anchor rod can be divided into a bonding anchor rod, a friction type anchor rod, an end anchoring type anchor rod and a mixed type anchor rod according to an anchoring mechanism.
The anchor bolt support mode is as follows: concentrated anchoring and full-length anchoring. The concentrated anchoring is realized by stretching the anchor rod through the anchor head at the bottom end of the anchor hole and the fastening part at the other end so as to inhibit the deformation and the looseness of the surrounding rock. The centralized anchoring type anchor rod comprises a wedge seam type anchor rod, a shell expansion type anchor rod, a resin anchor rod, a prestressed anchor cable and the like; the full-length anchoring is realized by bonding the anchor rod with rock or soil layer in the full-length range through the cementing material between the rod body and the hole wall. The full-length anchoring type anchor rod includes a mortar anchor rod, a resin anchor rod and the like.
The anchoring mode of the anchor rod is as follows: mechanical anchoring type anchor rods and adhesive anchoring type anchor rods. Mechanical anchoring type stock, the anchor or the stock body and the stock pore wall contact, lean on frictional resistance to play the stock of anchor effect. The cohesive anchoring type anchor rod is characterized by that the partial or whole length of anchor rod body is made up by using cementing materials of resin, mortar and cement, etc. to cohere and tightly attach the anchor rod body and anchor rod hole wall together and utilize cohesive force to make anchoring action.
The invention content is as follows:
the utility model aims at providing a recoverable breathing formula stock, it has overcome the construction process of traditional stock complicated, need slip casting, the construction period is long not enough that the cost is high, has solved the structure complicacy of current spin stock, the shell structure stock that rises, the omnidirectional breathing structure stock etc., construction difficulty, structural strength and anchoring force are not high, retrieve difficult scheduling problem.
The above purpose is realized by the following technical scheme:
a recoverable expansion-contraction type anchor rod comprises: the stock body of rod, the stock body of rod on install a set of breathing out device, the stock body adopt steel tube construction, and stock body of rod surface interval processing have screw thread, stop nut or spacing ring, the breathing out device, its one end articulated nut passes through the screw thread install the stock body of rod wall on the screw thread section, the spacing ring cover of other end articulated stock body wall on with stop nut or spacing ring department, the breathing out device articulated link to each other by two support arm one ends, both ends articulate with a nut and a ring respectively in addition.
Recoverable breathing formula stock, the stock body of rod on connect screw thread and nut installation screw thread and be the turn-buckle, when clockwise rotation the stock body of rod time, the nut of support arm one end is close to the ring of the other end, drives the support arm and outwards opens.
Recoverable breathing formula stock, the stock body of rod both ends add and have body of rod connection screw thread, thereby can pass through body of rod connection screw thread interconnect increase anchor length, and the stock body of rod on radially bore and prevent moving back the knot pinhole and wear the round pin, pass through screw thread installation ground tackle in the outer end of anchor head.
The utility model has the advantages that:
the soil anchor rod is almost applied to mortar or cement slurry pouring bonding type anchoring, although the anchoring form can be widely suitable for various soil body structural projects, the construction complexity is high, particularly the strength waiting time after pouring often seriously influences the project progress, and the soil body characteristic is just that the project can be well met by timely anchoring, so that the rapid anchoring of the soil body is realized through the expansion type anchor rod, and the soil body anchor rod has very important significance for rapid and safe construction of soil foundation pits and side slopes.
The utility model provides a current interim stock anchor power low, the stock structure is complicated, intensity is not high, and retrieve difficult problem. The recoverable expansion-contraction anchor rod can provide larger counter force, has the advantages of good stability, uniform stress and the like, has the advantages of easiness in operation, convenience in disassembly and assembly, convenience in transportation, low price, high construction efficiency, wide applicability and the like, and is very wide in application range and prospect.
The utility model discloses an anchor rod installation is accomplished just can reach anchor power fast, makes supporting construction and soil body in time consolidate, improves construction safety greatly, and recoverable stock not only can reduce underground pollution, can retrieve again and recycle reduce cost.
The utility model discloses can realize the full length or the segmentation anchor of stock, lean on tightly or inlay through a plurality of breathing devices and pore wall stratum, the frictional resistance and the shear strength on performance ground layer that can be better. When the anchor rod is used as a temporary anchor rod, the anchor rod does not need grouting, the anchoring and the recovery are simple and quick, the construction cost is saved, the construction period is shortened, and the efficiency and the benefit are improved.
The utility model discloses ingenious utilization the screw rod principle realize the breathing of breathing device and draw in, the whole anchor that expands in succession of the body of rod has basically been realized, the stock can increase the stock diameter in anchor and use, improvement anchoring force by a wide margin can obtain the anchoring force of major diameter stock through less anchor eye, and simultaneously, because the breathing device extrudees the pore wall soil layer to radial and drill way direction, make the physical mechanics nature of the soil body improve greatly, make the stock have certain resistance to plucking prestressing force simultaneously, the stock length has been saved. Therefore, this utility model is obviously superior to from rotating stock, scarf formula stock, the shell anchor that rises and expand the end stock.
The utility model can perform full-length or segmented grouting in the anchor hole through the opening at the bottom of the anchor rod body or the small hole on the rod wall, thereby obtaining larger anchoring force and becoming a permanent anchor rod, and performing segmented grouting and segmented recovery as required; the anchor rod body of the expansion-contraction-free device can be additionally connected, so that the anchor rod has a corresponding free section and an anchoring section, and prestress can be applied to achieve the anchoring effect and effect of the prestressed anchor rod.
The utility model is not affected by the angle of the anchor hole and can be adjusted and customized according to the depth and diameter of the anchor hole; considering that the creep of the soil layer may cause the reduction of the anchoring force, when the expansion and contraction device is not expanded to the maximum diameter, the diameter of the anchoring body can be further enlarged by continuously rotating the anchor rod body to increase the pulling resistance, and then the anchoring force on the supporting structure is improved by screwing the anchor.
Description of the drawings:
fig. 1 is a front view of the initial state of the present invention.
Fig. 2 is a plan view of the initial state of the present invention.
Fig. 3 is a front view of the anchoring state of the present invention.
In the figure: 1. the anchor rod comprises an anchor rod body, 2, an expansion and contraction device, 3, a nut, 4, a circular ring, 5, a nut installation screw thread, 6, a limiting nut or a limiting circular ring, 7, a rod body connecting screw thread, 8, a bottom end opening, 9, a drainage grouting small hole, 10 and an anti-back thread through pin hole.
The specific implementation mode is as follows:
example 1:
a recoverable expansion-contraction type anchor rod comprises: stock body of rod 1, the stock body of rod on install a set of breathing out device 2, the stock body adopt steel tube construction, and stock body of rod surface interval processing have screw thread and stop nut or spacing ring 6, the breathing out device, its one end articulated nut passes through the screw thread install the stock body of rod wall on the screw thread section, the spacing ring cover of other end articulated have stock body of rod wall on stop nut or spacing ring department to can free rotation, the breathing out device link to each other by two support arm one end articulatedly, both ends articulate with a nut 3 and a ring 4 respectively in addition.
Example 2:
according to embodiment 1 recoverable breathing formula stock, the stock body of rod on connect screw thread 7 and nut installation screw thread 5 and be the positive thread, when clockwise rotation the stock body of rod time, the nut of support arm one end is close to the ring of the other end, drives the support arm and outwards opens and lean on tightly or inlay hole wall rock soil layer, realizes the anchor of stock.
Example 3:
according to embodiment 1 or 2 recoverable breathing formula stock, stock body of rod both ends add and the body of rod connect the screw thread, thereby can pass through body of rod connect screw thread interconnect increase anchor length to the stock body of rod on radial drilling prevent moving back and detain pinhole 10 and wear the round pin, prevent anticlockwise rotation the stock body of rod take place to move back and detain or not hard up, pass through screw thread installation ground tackle in the outer end of anchor head.
Example 4:
according to the recoverable expanding-contracting anchor rod in the embodiment 1, the bottom end opening 8 of the anchor rod body is formed, the small drainage grouting holes 9 can be drilled in the pipe wall in a subsection or full section, and the anchor hole can be grouted and reinforced or water in the stratum can be drained through the bottom end opening and the small drainage grouting holes in the rod wall.
Example 5:
the anchor rod is anchored, released and recovered by rotating the anchor rod body forward and backward. Firstly, drilling anchor holes of 100-150 mm in a stratum, wherein the inclination angle is preferably 15-25 degrees, the horizontal interval is not less than 1.5m, the vertical interval is not less than 2.0m, and the length of an anchoring section in the soil layer is not less than 6.0m and is not more than 14 m. The anchor rod body comprises an expansion device, the outer diameter of the expansion device is slightly smaller than the diameter of the anchor hole and is tightly matched with the anchor hole, the expansion anchor rod is pressed into or screwed into the anchor hole and is connected section by section until the bottom of the hole, a screw thread is fastened and a pin is inserted to prevent reverse rotation when the anchor rod is connected, and the reserved length of an external anchor head is considered and calculated. When anchoring, the anchor rod body is screwed clockwise, so that the support arm of the expansion and contraction device is fully expanded and pressed into the hole wall, and the support arm is embedded into the hole wall for a certain depth or is expanded to the maximum diameter. Whether the uplift resistance of the anchor rod meets the design requirements or not is detected through a drawing test, and a bearing plate, an anchorage device and the like are installed on the basis of detecting the requirements to complete the whole structure of the anchor rod.
When the anchor rod is recovered, the anchor rod body is rotated anticlockwise, the nut at one end of the support arm moves towards the direction of the circular ring far away from the other end, so that the opened support arm is folded, the anchoring between the support arm and the hole wall is released, and the anchor rod can be pulled out from the anchor hole at the moment, so that the purpose of recovery is realized.
Installing the expansion-contraction type anchor rods, pressing or screwing the anchor rods with the expansion-contraction devices, the outer diameters of which are slightly smaller than the diameters of the anchor holes, into the anchor holes mechanically or manually, connecting and lengthening the anchor rods to the bottoms of the holes through screw threads at two ends of each anchor rod, screwing the screw threads and penetrating pins when the anchor rods are connected, and calculating the reserved length of an external anchor head by considering the displacement possibly generated by screwing the anchor rods and the length requirement of installing an anchor device.
When the stock carries out the anchor, through machinery or artifical clockwise the stock body of rod of screwing, make the support arm of breathing device fully open the pore wall of impressing, make the support arm imbed the certain degree of depth of pore wall or expand to the maximum position through the moment of torsion of screwing to the body of rod or number of turns, realize the maximum anchoring force of stock and whether satisfy the designing requirement through the withdrawal resistance of drawing experimental detection stock.
When the anchor rod needs to be recovered, the anchor rod body is rotated anticlockwise mechanically or manually, so that the nut at one end of the support arm moves in the opposite direction, the opened support arm is driven to be folded, the anchoring of the support arm and the hole wall is removed, and at the moment, the anchor rod is pulled out from the anchor hole in a segmented mode through mechanical or manual operation, and the purpose of recovery is achieved.
When the anchor rod is arranged in a rock layer for drilling, anchor holes are arranged according to design requirements, the hole diameter, the hole depth inclination angle and the like are determined, a down-the-hole is adopted for drilling holes, the quality of the formed holes is emptied and checked, then the expansion anchor rod is installed, the rod body is screwed so that the support arm is embedded and fixed at rock layer cracks and pit slots or tensioned on the wall of the rock hole, the anchor rod can be mechanically anchored in full length, the rod body of the anchor rod without an expansion device can be connected to form a free section of the anchor rod, and if the anchor rod is not required to be recycled, the anchor rod can be.
In the anchor rod of the sand layer, the anchor rod body without the expansion device can be partially connected to form a free section of the anchor rod, so that the end anchor rod and the anchoring applying prestress are realized; if do not consider the recovery stock, can carry out the slip casting to the anchor eye and realize full length bonding anchor, also can consider to set up through the segmentation and stop the thick liquid valve, realize partial slip casting anchor to can not wear the round pin at the junction of recovery section and anchor section stock and prevent the back off, realize the purpose that the stock was retrieved to part through the anticlockwise rotation body of rod.
Claims (3)
1. A recoverable expansion-contraction type anchor rod comprises: the stock body of rod, characterized by: the stock body on install a set of breathing out device, the stock body adopt steel tube construction, and stock body surface interval process have screw thread, stop nut or spacing ring, the breathing out device, its one end articulated nut passes through the screw thread install the stock body wall on the screw thread section, the spacing ring cover of other end articulated is in stock body wall on with stop nut or spacing ring department, the breathing out device link to each other by two support arm one end articulatedly, both ends articulate with a nut and a ring respectively in addition.
2. A retrievable expansion anchor according to claim 1, wherein: the anchor rod body on connect screw thread and nut installation screw thread be the turn-buckle, when clockwise rotation the anchor rod body of rod time, the nut of support arm one end is close to the ring of the other end, drives the support arm and outwards opens.
3. A retrievable expansion anchor according to claim 2, wherein: the anchor rod body both ends add and have body of rod connection screw thread, thereby can pass through body of rod connection screw thread interconnect increase anchor length, and the anchor rod body on radially bore and prevent moving back the knot and wear the pinhole and wear the round pin, pass through screw thread installation ground tackle in the outer end of anchor head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921462741.6U CN211397620U (en) | 2019-09-04 | 2019-09-04 | Recoverable expanding anchor rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921462741.6U CN211397620U (en) | 2019-09-04 | 2019-09-04 | Recoverable expanding anchor rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211397620U true CN211397620U (en) | 2020-09-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921462741.6U Expired - Fee Related CN211397620U (en) | 2019-09-04 | 2019-09-04 | Recoverable expanding anchor rod |
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| Country | Link |
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| CN (1) | CN211397620U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112160782A (en) * | 2020-09-30 | 2021-01-01 | 辽宁工程技术大学 | Multi-stage retractable anti-falling anchor rod structure and using method |
| CN113153393A (en) * | 2021-06-02 | 2021-07-23 | 中国矿业大学 | Self-adaptive anti-shearing large-deformation anchor rod |
| CN113323702A (en) * | 2021-06-17 | 2021-08-31 | 文山麻栗坡紫金钨业集团有限公司 | Transmission expansion type anchor rod and installation method thereof |
| CN113605384A (en) * | 2021-06-24 | 2021-11-05 | 广西北投交通养护科技集团有限公司 | Construction method of multi-section self-adaptive expansion anchor rod |
| CN113605948A (en) * | 2021-06-24 | 2021-11-05 | 广西北投交通养护科技集团有限公司 | Multi-section self-adaptive expansion anchor rod recovery method |
| CN113668521A (en) * | 2021-06-24 | 2021-11-19 | 广西北投交通养护科技集团有限公司 | Recoverable multistage self-adaptation inflation stock |
| CN117071594A (en) * | 2023-10-13 | 2023-11-17 | 四川省建筑科学研究院有限公司 | Foundation pit supporting structure |
-
2019
- 2019-09-04 CN CN201921462741.6U patent/CN211397620U/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112160782A (en) * | 2020-09-30 | 2021-01-01 | 辽宁工程技术大学 | Multi-stage retractable anti-falling anchor rod structure and using method |
| CN113153393A (en) * | 2021-06-02 | 2021-07-23 | 中国矿业大学 | Self-adaptive anti-shearing large-deformation anchor rod |
| CN113153393B (en) * | 2021-06-02 | 2022-08-02 | 中国矿业大学 | Self-adaptive anti-shearing large-deformation anchor rod |
| CN113323702A (en) * | 2021-06-17 | 2021-08-31 | 文山麻栗坡紫金钨业集团有限公司 | Transmission expansion type anchor rod and installation method thereof |
| CN113605384A (en) * | 2021-06-24 | 2021-11-05 | 广西北投交通养护科技集团有限公司 | Construction method of multi-section self-adaptive expansion anchor rod |
| CN113605948A (en) * | 2021-06-24 | 2021-11-05 | 广西北投交通养护科技集团有限公司 | Multi-section self-adaptive expansion anchor rod recovery method |
| CN113668521A (en) * | 2021-06-24 | 2021-11-19 | 广西北投交通养护科技集团有限公司 | Recoverable multistage self-adaptation inflation stock |
| CN113605948B (en) * | 2021-06-24 | 2023-12-29 | 广西北投交通养护科技集团有限公司 | Multi-section self-adaptive expansion anchor rod recycling method |
| CN117071594A (en) * | 2023-10-13 | 2023-11-17 | 四川省建筑科学研究院有限公司 | Foundation pit supporting structure |
| CN117071594B (en) * | 2023-10-13 | 2023-12-22 | 四川省建筑科学研究院有限公司 | Foundation pit supporting structure |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
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Granted publication date: 20200901 |