CN2289830Y - Sand consolidation anchor head prestressed rockbolt - Google Patents
Sand consolidation anchor head prestressed rockbolt Download PDFInfo
- Publication number
- CN2289830Y CN2289830Y CN 97209453 CN97209453U CN2289830Y CN 2289830 Y CN2289830 Y CN 2289830Y CN 97209453 CN97209453 CN 97209453 CN 97209453 U CN97209453 U CN 97209453U CN 2289830 Y CN2289830 Y CN 2289830Y
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- sand
- anchor
- anchoring
- cylinder
- hollow
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- Expired - Fee Related
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Abstract
The utility model relates to a sand consolidation anchoring head prestressed anchoring bolt, which is suitable for prestressed anchoring in geotechnical engineering. The utility model is characterized in that the utility model is composed of a sand cylinder body, an anchoring bolt, a loading plate, a sealing opening, and a small iron clamp. Natural sand is used as anchoring materials. The utility model has the advantages of simple manufacturing process, manual installation, and low cost. After the anchoring bolt is installed, the prestressed force can be applied fast and duly. The primary anchoring force is large, and the deformation of the rock and soil can be controlled duly in an early time.
Description
The present invention is applicable to geotechnical engineering, the prestress anchoraging in the geotechnics particularly, as deep foundation engineering, the stability of slope engineering, underground construction, works overturning or slip resistance analysis engineering, water booster system, the rock mass reinforcing in all kinds of tunnels, collapse and administer and Deformation control, the anti-floating and the protection in hydraulic engineering protection against erosion district, various works are stable with anchoring etc.
Existing pipe anchor rod belongs to the total length friction anchoring, and mechanical rock bolt belongs to the some friction anchoring, and resin or fast (firmly) cement grouted bolt genus that coagulates are concentrated bond-anchorage, and sand consolidated anchorage prestressed bolt belongs to local friction's anchoring.
On the performance, just anchor-hold is little for pipe-seam type anchor rod, and the anchored force performance is with just performance gradually of rock mass deformation; Resin and fast setting cement anchor bolt construction require relatively stricter, and operation easier is bigger, the construction quality instability.
Install installation aspect, current anchor pole generally needs a cover Special Equipment, and installing as water swelling formula anchor pole needs hydraulic test; Pipe-seam type anchor rod needs air drill to squeeze into; Grouting rock bolt needs grouting machine, and these all are subjected to the influence of wind, electricity, mechanical accident.
The cost aspect, pipe anchor rod, the resin anchor raw material are more expensive, processed complex, construction requirement height, cost height; Higher and the poor-performing of mechanical rock bolt cost; The sand consolidated anchorage prestressed bolt cost is low, and adopts manual the installation, and first anchor-hold is big, can apply prestressing force fast, in time, and construction is simple, steady quality, thereby it has overcome the shortcoming of other anchor pole.
Current, anchor bolt construction finishes and applies prestressing force to anchor pole in the geotechnical engineering, because the restriction on technology and the method, generally (except the mechanical rock bolt) at interval for some time.If after anchor pole inserts boring, can apply prestressing force, just can carry out active immediately and reinforce, and control the ground distortion in time geotechnical body, this particularly is of great significance for emergency dealing for reinforcing geotechnical body effectively.From the strict sense ground is carried out instant active and reinforce, be the problem that geotechnical engineering circle extremely is concerned about always.Sand consolidated anchorage prestressed bolt applies prestressing force after can be in the anchor pole patchhole immediately, and method is easy, and the constructor is easy to grasp, and this is one of the outstanding advantage of this novel pre-stressed anchor pole just.
In order to achieve the above object, we have developed the sand consolidated anchorage prestressed bolt based on brand-new anchoring principle, it by anchor pole, natural sand body, circle load plate, seal, little iron clamp etc. forms.
The most preferred embodiment of the utility model anchor pole is seen Fig. 1, Fig. 2.
Wherein: Fig. 1 is the structural representation before the sand consolidated anchorage prestressed bolt drawing locking, it by load plate 1, hollow sand cylinder 2, seal 3, little iron clamp 4, anchor pole 5, anchor hole 6, pedestal 7, bearing plate 8, outer anchor head 9, become joint 10, force transmission rack 11, hollow jack 12, stayed mast 14 etc. and constitute.Fig. 2 is the sand consolidated anchorage prestressed bolt structure chart, it by load plate 1, sand body 13 (interior anchor head), seal 3, formation such as little iron head 4, anchor pole 5, anchor hole 6, pedestal 7, bearing plate 8, outer anchor head 9.Stayed mast 14 is reused among the figure, can save the anchor pole material.According to the engineering actual conditions, pedestal 7 can omit.Below in conjunction with accompanying drawing 1 and embodiment the utility model is described in further detail.Adopt natural sand, cement, water to prepare cement mortar by a certain percentage, with sand mo(u)ld precast hollow sand cylinder 2, hollow sand cylinder length is determined by designing requirement, for example, bore diameter is 56mm, during a plurality of hollow sand cylinder total length 40cm, No. 45 steel anchor rods of diameter 20mm are broken (about 18 tons of pulling force).The steel cylinder that is shaped as end sealing of sand mo(u)ld is at reinforcing bar of cylinder axle center weldering, additional hollow piston and push rod.When the sand cylinder is prefabricated, cement mortar is full of cylinder, promotes piston then, hollow sand cylinder is promptly made.The size of sand mo(u)ld is made by the dimensional requirement of hollow sand cylinder, the size of hollow sand cylinder is determined by anchor hole diameter, bolt diameter situation, the anchor hole diameter determines that by engineering reality and existing drilling machine condition this anchor pole is not strict with the anchor hole diameter, and is applied widely.Round load plate 1 of anchor head end weldering in anchor pole 5, wooden car becomes hollow cylinder to seal 3 with expanding, when anchor pole 5 is installed, little iron clamp 4 prevents to seal and the sand cylinder slides, the body of rod that assembles is pushed in the anchor hole, water filling in the hole, if anchor hole is directed upwardly, as back anchor pole etc., should be earlier pushing again in the anchor hole after the interior anchor head immersion, wait to seal drawing after 3 imbibitions, hollow sand cylinder is crushed to and is loose sand, because the densification of sand body is fixed and the dilatancy of close sand, utilizes the frictional force between sand body and the hole wall that anchored force (as shown in Figure 2) is provided.Annotated is if this anchor pole needs slip casting after installing, can reserve injected hole and steam vent on bearing plate 8.Monitor anchor rod prestress if desired, can bearing plate 8 and outside preset device for measuring force between the anchor head 9.This anchor rod system can repack anchor cable system into equally.
Just anchor-hold is big for sand consolidated anchorage prestressed bolt, and the anchor hole diameter is not required, and not only mining tunnel is suitable for, and also can be used for side slope, tunnel, large-scale chamber etc., and suitable application area is wide.Can apply prestressing force fast in time, be specially adapted to engineering and rob inspection.Wind, electromechanical as long as install by hand, are not influenced by mechanical accident, and construction technology is simple, steady quality.The raw material abundance, technology is simple, and cost is low.
Claims (3)
1. sand consolidated anchorage prestressed bolt, its feature exists: it is by circle load plate 1, and the hollow sand cylinder 2 that sand mo(u)ld is prefabricated seals 3, little iron clamp 4, anchor pole 5 is formed; The circle load plate is welded on anchor head end in the anchor pole 5, becomes hollow cylinder to seal 3 with the wooden car that expands, and when pushing anchor pole, little iron clamp 4 prevents to seal and the sand cylinder slides.
2. sand consolidated anchorage prestressed bolt according to claim 1 is characterized in that adopting natural sand as anchoring material.
3. sand consolidated anchorage prestressed bolt according to claim 1 is characterized in that hollow sand cylinder, adopts cement paste to make cementitious materials, with the sand mo(u)ld typing, natural sand is prefabricated into hollow sand cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97209453 CN2289830Y (en) | 1997-03-14 | 1997-03-14 | Sand consolidation anchor head prestressed rockbolt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97209453 CN2289830Y (en) | 1997-03-14 | 1997-03-14 | Sand consolidation anchor head prestressed rockbolt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2289830Y true CN2289830Y (en) | 1998-09-02 |
Family
ID=33928639
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97209453 Expired - Fee Related CN2289830Y (en) | 1997-03-14 | 1997-03-14 | Sand consolidation anchor head prestressed rockbolt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2289830Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104499493A (en) * | 2015-01-05 | 2015-04-08 | 中国电建集团华东勘测设计研究院有限公司 | Deformable prestressed anchor pier |
| CN107630475A (en) * | 2017-08-29 | 2018-01-26 | 广东省建筑科学研究院集团股份有限公司 | The board-like counterforce device of pressure-bearing and its installation method of anchor pole pullout tests |
| CN109339839A (en) * | 2018-09-30 | 2019-02-15 | 中国科学院武汉岩土力学研究所 | Recyclable sand consolidates anchor head prestressed anchor, anchoring jack and its application method |
| CN111927514A (en) * | 2020-08-03 | 2020-11-13 | 中国矿业大学 | Prestress full-length anchoring system and method based on steel grit adding in post-grouting method |
| CN113668326A (en) * | 2021-08-12 | 2021-11-19 | 中冶南方城市建设工程技术有限公司 | Cast-in-place prestressed concrete pavement structure and construction method thereof |
-
1997
- 1997-03-14 CN CN 97209453 patent/CN2289830Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104499493A (en) * | 2015-01-05 | 2015-04-08 | 中国电建集团华东勘测设计研究院有限公司 | Deformable prestressed anchor pier |
| CN107630475A (en) * | 2017-08-29 | 2018-01-26 | 广东省建筑科学研究院集团股份有限公司 | The board-like counterforce device of pressure-bearing and its installation method of anchor pole pullout tests |
| CN109339839A (en) * | 2018-09-30 | 2019-02-15 | 中国科学院武汉岩土力学研究所 | Recyclable sand consolidates anchor head prestressed anchor, anchoring jack and its application method |
| CN111927514A (en) * | 2020-08-03 | 2020-11-13 | 中国矿业大学 | Prestress full-length anchoring system and method based on steel grit adding in post-grouting method |
| CN113668326A (en) * | 2021-08-12 | 2021-11-19 | 中冶南方城市建设工程技术有限公司 | Cast-in-place prestressed concrete pavement structure and construction method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |