CN201826309U - Full-length bonded prestress anchor rod - Google Patents
Full-length bonded prestress anchor rod Download PDFInfo
- Publication number
- CN201826309U CN201826309U CN2010205717200U CN201020571720U CN201826309U CN 201826309 U CN201826309 U CN 201826309U CN 2010205717200 U CN2010205717200 U CN 2010205717200U CN 201020571720 U CN201020571720 U CN 201020571720U CN 201826309 U CN201826309 U CN 201826309U
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- bar body
- anchor bar
- anchor
- anchor rod
- rises
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Abstract
The utility model discloses a full-length bonded prestress anchor rod. External threads and noncontinuous bulges, which are connected with an expansion shell anchoring head, are processed in sequence at the front end of a solid anchor rod body, and an axial groove is formed between each two bulges; pin holes communicated with one another are formed on the rear end of the anchor rod body and nuts, and temporary pins are inserted into the pin holes; and an adhesive layer formed by delayed coagulation resin anchoring agent is arranged between the anchor rod and a drill hole wall. The full-length bonded prestress anchor rod provided by the utility model solves the problem in supporting high ground stress laneway, can not only can be used for permanent support, but also can be used for temporary support.
Description
Technical field
The utility model relates to the anchor pole that mine, traffic, water conservancy, engineering field are used.
Background technology
In underground construction, mining engineering, foundation ditch and the slope project that geotechnical engineering relates to, jeopardize safety for preventing stratum deformation or unstability, need reinforce the stratum, the main method of reinforcing is to adopt bolt support.Bolt support can be given full play to the supporting capacity of geotechnical body self, be a kind of little to the protolith disturbance, speed of application is fast, the reinforcing technique of safe and reliable, economical rationality, draw to play in the engineering widely at mine construction, high gradient slope, large-scale underground chamber, large-scale arc door gate pier, dam and the dam foundation, building reinforce, anti-floating engineering, overturning or slip resistance analysis engineering, anchor and use.
The anchor pole of using in present most of mine and the geotechnical engineering is no prestressing force end anchorage class.Though end anchorage type anchor pole has apparent in view effect for improving the surrouding rock stress environment and improving the country rock bearing capacity, but in the high-ground stress well lane engineering of deep or under other special situation, simple end anchor effect is not very good, show as its supporting capacity deficiency, slip occurs easily or anchor pole is broken phenomenons such as inefficacy.In order to overcome this shortcoming, full length fastening type anchor pole is attempted using in some colliery.Common full anchor formula anchor pole has multiple at present.
For example: Chinese utility model patent ZL02112233.4 discloses a kind of anchor rod support method and segmented hollow grouting anchor thereof, the technical scheme of proposition be a kind of morning of strong anchoring, can prestressed segmented hollow grouting anchor.This anchor bar body is owing to be hollow, and its tensile strength is limited, so can not adapt to heavily stressed stone head supporting.
China utility model patent ZL200320107953.5 discloses a kind of expansion type rock bolt, this anchor pole is by the shell anchorage head that rises, anchor bar body, pallet, nut, composition such as exhaust or inlet pipe, adopt hollow tube to make anchor bar body or tie up a pipeline to replace hollow tube to make anchor bar body with solid reinforcing bar, the anchor bar body front end is provided with a circle projection, the backing plate connecting pipe of inserting with holes, the shell anchorage head that rises is done the termination point of anchor rod anchoring, after installation rises by the anchoring of shell anchorage head, carry out the slip casting anchoring again, because anchor bar body is a hollow, or only be a thin reinforcing bar, so can not adapt to heavily stressed rock improvement.In addition, during construction, need first skyhook, and then carry out slip casting, substep carries out, and need change construction tool or equipment midway.
In sum, end anchorage type anchor pole and hollow type grouted anchor bar, be only applicable to the specific occasion, not satisfactory for the effect of deep high-ground stress roadway support, have only total length binding prestress type anchor pole could better solve the supporting problem of high-ground stress tunnel, deep, chamber.
Summary of the invention
The purpose of this utility model is that the deficiency that overcomes existing anchor pole provides a kind of total length binding prestress anchor pole.Solve the supporting problem in high-ground stress tunnel by this anchor pole, both can be used as permanent support, can be used as temporary lining again.
Being configured to of the utility model total length binding prestress anchor pole: shell anchorage head, anchor bar body, pallet and nut are formed by rising, it is characterized in that, described anchor bar body is solid anchor bar body, the anchor bar body front end is processed with external screw thread and the discontinuous projection that is connected with the shell anchorage head that rises successively, forms axial notch between the projection; The follower head of anchor bar body and nut are provided with the pin-and-hole that communicates, and are inserted with interim pin in the pin-and-hole; Be provided with the tack coat that the slow setting resin anchoring agent forms between anchor bar body and the drill hole wall.
In order to realize the total length bonding better, the described shell anchorage head that rises is the hollow circular cylinder of top closure, the inner surface on shaft top is provided with the internal thread that is connected with the anchor bar body front end, and afterbody is provided with the discontinuous valve sheet that rises that matches with the anchor bar body projection, and the limb external surface has pawl.
Resin anchoring agent can be back to bolthole during for the assurance construction, is provided with the circular hole of two or four symmetries all over the body at the shell anchorage head that rises.
The job practices of the utility model total length binding prestress anchor pole is: during installation, the slow setting resin anchoring cartridge of will rise successively shell anchoring termination, capacity is sent in the hole with anchor pole; Overlap top tray then, the high-strength nut of screwing on is plugged interim pin, connects the high-strength nut that is locked by pin with MQS90J2 type Pneumatic anchor rod fitting machine (Chinese Academy of Sciences development moment of torsion maximum can reach 1200Nm), anchor pole is pushed the hole at the bottom of; Simultaneously, the extruding powder stick makes it diffuse in the hole by groove, all bonds with hole wall, twists into two parts until interim pin, makes pallet be close to the aperture crag; Show that anchor bar body inserts the shell termination and making it on spreading is fixed at the bottom of the hole of rising this moment; Before the slow setting resin anchoring cartridge solidifies, continue to bore tight nut and be that anchor bar body applies is high-strength prestressed.
The utility model total length binding prestress anchor pole advantage is:
1, owing to adopt solid anchor bar body, and in the boring without exhaust or inlet pipe, so the diameter that the diameter of anchor bar body can be designed as with whole boring adapts, with respect to prior art, the diameter of anchor bar body increases many, so tensile strength is big, suits to use in the high-ground stress mining area.
2, owing to adopt the whole boring of resin anchoring agent anchoring, anchoring effect is good, can effectively control surrouding rock deformation.
3, with MQS90J2 type Pneumatic anchor rod fitting machine fastening nut, apply prestressing force, part is recovered the stress of primary rock, improves the supporting effect of anchor pole.
4, owing to adopt the shell anchorage head that rises, can solidify prerequisite for certain anchored force at powder stick, can realize applying the total length bonding of high-strength prestressed and anchor pole, avoid bolt support end anchor that prestressing force is arranged and the no prestressed defective of total length bonding, improve the stressed distribution of anchor pole.
5, this method easy construction, quick, and the prestress value that is applied is big, can apply prestressing force in the total length bonding, and a step finishes, and need not change construction tool or equipment midway.
Description of drawings
Fig. 1 is the utility model anchor bar body example structure schematic diagram;
Fig. 2 is the A-A profile of Fig. 1.
Marginal data: the 1-shell anchorage head that rises; The 2-anchor bar body; The 3-projection; The 4-groove; The interim pin of 5-; The 6-nut; The 7-bolthole; The 8-tack coat; The 9-pallet; The 10-circular hole; The 11-internal thread; The 12-limb.
The specific embodiment
A kind of total length binding prestress anchor pole as shown in Figure 1 is made up of the shell anchorage head 1 that rises, anchor bar body 2, pallet 9 and nut 6, the described shell anchorage head 1 that rises is the hollow circular cylinder of top closure, the inner surface on shaft top is provided with the internal thread 11 that is connected with anchor bar body 2 front ends, afterbody is provided with the discontinuous valve sheet 12 that rises that matches with anchor bar body projection 3, and limb 12 external surfaces have pawl.Anchor bar body 2 is the solid body of rod of total length, and front end has screw thread, and reach 20mm～50mm is mainly used in shell anchorage head 1 internal thread 11 that rises and cooperates, and the anchor bar body 2 and the shell anchorage head 1 that rises are combined closely.At distance front end screw thread 5mm～10mm place, four projection 3 (see figure 2)s along the axis direction symmetry are arranged, length is 15mm～30mm, its effect is to match with 1 four limbs 12 of shell anchorage head that rise, and makes limb 12 spreadings be close to hole wall, provides condition for applying pretightning force.Simultaneously, four projection 3 midfeathers form grooves 4, main effect be make the anchoring agent after being subjected to big extruding along anchor bar body 2 to outflow, to realize the total length bonding.
Above-mentioned anchor bar body 2 tailing screw flights cooperate with nut, and be provided with the pin-and-hole that communicates, interim pin 5 is installed on the pin-and-hole, main effect is to make nut 6 and anchor bar body 2 no relative displacements in earlier stage and anchor bar body 2 is crept at skyhook, interim pin 5 is cut off when torsion reaches interim pin 5 shear strengths, illustrate that the hole bottom bar body and the shell anchorage head 1 that rises combine closely and produced anchored force this moment, continue swivel nut 6 and can realize applying prestressing force.The notch of the notch of nut 6 and MQS90J2 type Pneumatic anchor rod fitting machine is complementary, and its effect is to apply prestressing force when can realize skyhook, avoids using sleeve to dismantle repeatedly.
During construction, at the bottom of the slow setting resin anchoring cartridge of shell anchorage head 1, the capacity of will rising is at first successively sent into the hole with anchor bar body 2 along bolthole 7.Tray 9, packing ring and high-strength nut 6 successively subsequently, the interim pin of high-strength nut 6 and anchor bar body 2 usefulness 5 is locked.Connect high-strength nut 6 with MQS90J2 type Pneumatic anchor rod fitting machine then, when pushing anchor bar body 2 in the hole,, from groove 4, be back under pressure after powder stick breaks and form tack coat 8 in the whole hole wall with crunch extruding slow setting resin anchoring cartridge.Resin anchoring agent can be back to bolthole 7 during for the assurance construction, is provided with the circular hole 10 of four symmetries on shell anchorage head 1 whole body of rising.Simultaneously, along with screwing of the anchor pole front end and shell anchorage head 1 screw thread that rises, four projectioies 3 on the anchor bar body 2 are opened 1 four limbs 12 of shell anchorage head that rise and are progressively pushed hole wall, produce anchored force.When anchor bar body 2 can not rotate, show that limb 12 opens to greatest extent, the shell anchoring of rising is finished.Continue to creep into and reach interim pin 5 shear strengths, interim pin 5 is cut off, and pallet 9 is close to hole wall, shows that anchor bar body 2 and anchorage head 1 combine closely and produced anchored force this moment, before the slow setting resin anchoring cartridge solidifies, continue fastening nut 6 and can realize prestressed applying.
Claims (3)
1. total length binding prestress anchor pole, it is made up of rise shell anchorage head, anchor bar body, pallet and nut, it is characterized in that, described anchor bar body is solid anchor bar body, the anchor bar body front end is processed with external screw thread and the discontinuous projection that is connected with the shell anchorage head that rises successively, forms axial notch between the projection; The follower head of anchor bar body and nut are provided with the pin-and-hole that communicates, and are inserted with interim pin in the pin-and-hole; Be provided with the tack coat that the slow setting resin anchoring agent forms between anchor bar body and the drill hole wall.
2. total length binding prestress anchor pole as claimed in claim 1, it is characterized in that, the described shell anchorage head that rises is the hollow circular cylinder of top closure, the inner surface on shaft top is provided with the internal thread that is connected with the anchor bar body front end, afterbody is provided with the discontinuous valve sheet that rises that matches with the anchor bar body projection, and the limb external surface has pawl.
3. total length binding prestress anchor pole as claimed in claim 1 is characterized in that, is provided with the circular hole of two or four symmetries all over the body at the shell anchorage head that rises.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205717200U CN201826309U (en) | 2010-10-16 | 2010-10-16 | Full-length bonded prestress anchor rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205717200U CN201826309U (en) | 2010-10-16 | 2010-10-16 | Full-length bonded prestress anchor rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201826309U true CN201826309U (en) | 2011-05-11 |
Family
ID=43964856
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205717200U Expired - Lifetime CN201826309U (en) | 2010-10-16 | 2010-10-16 | Full-length bonded prestress anchor rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201826309U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101994315A (en) * | 2010-10-16 | 2011-03-30 | 山东科技大学 | Full-length adhesive prestressed anchor rod and construction method thereof |
| CN103114865A (en) * | 2013-03-08 | 2013-05-22 | 安徽省煤炭科学研究院 | Vane-type stirring anchor cable |
-
2010
- 2010-10-16 CN CN2010205717200U patent/CN201826309U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101994315A (en) * | 2010-10-16 | 2011-03-30 | 山东科技大学 | Full-length adhesive prestressed anchor rod and construction method thereof |
| CN103114865A (en) * | 2013-03-08 | 2013-05-22 | 安徽省煤炭科学研究院 | Vane-type stirring anchor cable |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20110511 Effective date of abandoning: 20120502 |