CN203904992U - Multi-branch large-displacement expansion anchor head fiber reinforcement anchor rod used in intermediate-strong weathered rock strata - Google Patents
Multi-branch large-displacement expansion anchor head fiber reinforcement anchor rod used in intermediate-strong weathered rock strata Download PDFInfo
- Publication number
- CN203904992U CN203904992U CN201420191181.6U CN201420191181U CN203904992U CN 203904992 U CN203904992 U CN 203904992U CN 201420191181 U CN201420191181 U CN 201420191181U CN 203904992 U CN203904992 U CN 203904992U
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- China
- Prior art keywords
- fiber reinforcement
- anchor
- fiber bar
- upper connection
- displacement expansion
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- 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.)
- Expired - Lifetime
Links
- 239000000835 fiber Substances 0.000 title claims abstract description 47
- 239000011435 rock Substances 0.000 title claims abstract description 27
- 238000006073 displacement reaction Methods 0.000 title claims abstract description 14
- 230000002787 reinforcement Effects 0.000 title abstract 10
- 238000004873 anchoring Methods 0.000 claims abstract description 30
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- 239000002002 slurry Substances 0.000 abstract description 5
- 239000000463 material Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 4
- 230000003014 reinforcing effect Effects 0.000 description 4
- 238000005553 drilling Methods 0.000 description 3
- 229910010272 inorganic material Inorganic materials 0.000 description 3
- 239000011147 inorganic material Substances 0.000 description 3
- 238000013519 translation Methods 0.000 description 3
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 239000011440 grout Substances 0.000 description 2
- 241001074085 Scophthalmus aquosus Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 238000001802 infusion Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 230000010412 perfusion Effects 0.000 description 1
- 238000007569 slipcasting Methods 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Abstract
The utility model relates to a multi-branch large-displacement expansion anchor head fiber reinforcement anchor rod used in intermediate-strong weathered rock strata. A fiber reinforcement with threads on the upper surface penetrates through an upper connection sleeve, and the lower section of the fiber reinforcement is threaded connection with a lower screwed tapered end; the inner diameter of the upper connection sleeve is greater than the outer diameter of the upper connection sleeve, and the outer diameter of the upper connection sleeve is less than the diameter of an anchoring hole; a pair of upper connection rods is hinged to a pair of lower connection rods; the other end of each upper connection rod is hinged to the lower end of the upper connection sleeve; the other end of each lower connection rod is hinged to the upper part of the lower screwed tapered end. During use, the anchoring hole is drilled, the fiber reinforcement with threads on the upper surface is cut into the designed lengths, the lower end of the fiber reinforcement is screwed into the lower screwed tapered end, the bottom face of the fiber reinforcement is flush with the bottom face of the lower screwed tapered end, the fiber reinforcement anchor rod is placed into the drilled anchoring hole, a stressing casing sleeves the upper connection sleeve, the stressing casing is stressed, the upper connection rods and the lower connection rods are in an open state, and are inserted into the rock face of the anchoring hole, and the stressing casing is pulled out for grouting till slurry is coagulated. By adopting the multi-branch large-displacement expansion anchor head fiber reinforcement anchor rod, triple anchoring of wedge-caulking, chambering and adhering is realized, the length of the connection rods is adjustable, the expansion range of the anchor head is adjustable, and the multi-branch large-displacement expansion anchor head fiber reinforcement anchor rod is applicable to different rock strata.
Description
Technical field
The utility model relates to the large displacement expansion of a kind of multi-branched for, severely-weathered rock stratum anchor head fiber bar anchor pole.
Background technology
In, severely-weathered rock stratum is the basic condition often facing in all kinds of building foundation engineerings field.Because this type of rock stratum exists low bearing capacity, many unfavorable factors such as formation variations is large and unstable will realize reliable basic anchoring under such natural conditions, and anchoring rod must possess small-bore, low hole depth and large anchored force feature.Can realize the object that cost is low, anchoring efficiency is high like this.
In basic anchoring, once using for a long time more is Wedge-type anchor head, because the displacement expansion amount of the generation wedging effect of its anchor head is too little, in, under the lower condition of severely-weathered rock stratum bearing capacity, exist wedge anchor-hold less than normal, the problems such as anchoring is unreliable, the less application in building foundation engineering field.And the grouting rock bolt Ye You unit drilling depth anchored force of more use is low, engineering cost is high, can not realize instantaneous anchoring and construction quality, the problem such as should not control.So in anchoring field, rock stratum, exploitation can be by the Trinitarian multiple anchor pole of wedge anchor, slip casting and bottom reaming, anchoring effect and reliability in can greatly improving, under the condition of severely-weathered rock stratum.
Reinforcing bar is all the main material of using of building anchor rod body for a long time, and the primary load of anchor pole transmits by the body of rod, and the quality of rod body material performance can directly affect effect and the safety of anchoring.Because metal material reinforcing bar self exists some shortcoming that is difficult to overcome or limitation, such as corrosion, than great and fearness soda acid etc., if these problems are mishandling, the intensity of material can significantly reduce, and serious meeting affects the safety of anchoring engineering.So seek the substitution material of other suitable anchor rod bodies, it is the direction that anchoring field is explored always.Environment-protection fiber material have intensity high, lightweight, do not fear the features such as soda acid, and there is good anti-electromagnetic performance.With fiber bar, substituting reinforcing bar is following development trend as the rod body material of anchor pole, at some special occasion fiber bars, may have more unique using value.
Summary of the invention
The purpose of this utility model is for above-mentioned present situation, aims to provide a kind ofly can realize wedging, reaming and bonding triple anchoring, and anchoring is safe and reliable; Applicable different rock-layers, especially in, the large displacement expansion of the multi-branched for, the severely-weathered rock stratum anchor head fiber bar anchor pole of severely-weathered rock stratum.
The implementation of the utility model object is, be used for, the large displacement expansion of the multi-branched of severely-weathered rock stratum anchor head fiber bar anchor pole, the threaded fiber bar of external surface is through the smooth upper joint sleeve of surfaces externally and internally, hypomere is connected with lower screw lock head thread, the internal diameter of upper joint sleeve is greater than the external diameter of fiber bar, and external diameter is less than anchor hole diameter; Hinged between connecting rod and a pair of lower link on fiber bar periphery a pair of, the other end of upper connecting rod and upper joint sleeve lower end are hinged, the upper articulation of the other end of lower link and lower screw lock head.
Use the utility model: first at anchoring position, bore straight hole to projected depth, the threaded fiber bar of external surface is cut into design length, fiber bar lower end screws in lower screw lock head, bottom surface is concordant with lower screw lock head bottom surface, with bearing pin by between upper and lower connecting rod and upper connecting rod, upper and lower connecting rod, lower screw lock head connect as one fiber bar anchor pole; Fiber bar anchor pole is put into the anchor hole having bored, the lower end of afterburning sleeve pipe is contacted with upper joint sleeve, other end axial pressure at afterburning sleeve pipe, upper joint sleeve is done downward axially-movable under the effect of axial force along fiber rod, press down lower connecting rod, the open-shaped state of upper and lower connecting rod, along anchor hole radial translation, also with regard to anchor, penetrate in the crag of anchor hole, anchor head is compressed; After having pressurizeed, afterburning sleeve pipe is taken out from boring; In boring, pour into inorganic grouting material slurries, extract grout pipe out.Treat that inorganic material condenses.
The beneficial effects of the utility model are:
1, owing to having adopted large displacement expansion anchor head, can under weak rock stratum condition, realize high wedging anchoring effect;
2, simple in structure, install fast, can realize is that anchor produces direct anchored force;
3, length of connecting rod is adjustable, and the spreading range of anchor head is adjustable, the applicable different rock-layers of anchor pole;
4, realized wedging, reaming and bonding triple anchoring, anchoring is more safe and reliable;
5, adopt fiber bar, applicable special engineering-environment, especially in, severely-weathered rock stratum.
Accompanying drawing explanation
Fig. 1 be the hinged anchor head of the utility model in contraction state structural representation,
Fig. 2 is the utility model anchor head expansion state structural representation at the bottom of anchor hole.
The specific embodiment
With reference to Fig. 1, the threaded fiber bar 3 of external surface is through the smooth upper joint sleeve 1 of surfaces externally and internally, and lower end is connected with lower screw lock head thread, and the internal diameter of upper joint sleeve is greater than the external diameter of fiber bar 3, and fiber bar can be along its axially slippage without restrictions.The external diameter of upper joint sleeve is less than anchor hole diameter, when upper joint sleeve is pressed, can axially move without restrictions.Hinged between connecting rod 2 and a pair of lower link 4 on fiber bar 3 peripheries a pair of, the other end of upper connecting rod 2 and upper joint sleeve 2 lower ends are hinged, the upper articulation of the other end of lower link 4 and lower screw lock head 5,
Upper connecting rod 2 all adopts equal leg angle to make with lower link 4, and the length of connecting rod is 1.5-3 times of anchoring aperture, can surely get according to the characteristic of rock, and the bearing capacity of rock is large, gets smaller value, otherwise gets higher value.Lower screw lock head 5 centers are processed with the screw thread with fiber bar 3 external surface same sizes, and lower screw lock head 5 external cylindrical surface diameters are slightly less than the diameter of anchor hole, and it is conical that its underpart is, and anchor pole moves down cone in process and can play the guiding role.
The body of rod of the present utility model is helical surface fiber bar 3, can realize on its surface worm drive or connection.Upper joint sleeve 1 is the steel bushing that surfaces externally and internally is smooth.
Below in conjunction with accompanying drawing, the course of work of the present utility model is described further.Reaming anchor head of the present utility model is equivalent to the sliding-block linkage of one group of symmetry, and lower screw lock head 5 is fixed point, and it is connected with fiber rod bottom spiral, just maintains static after being screwed into position.
Of the present invention to install and use base program as follows: first at anchoring position, bore straight hole to projected depth, external surface spiral fiber muscle 3 is cut into design length, lower screw lock head 5 screws in the bottom of fiber bar, fiber bar bottom surface is concordant with lower lock head 5 bottom surfaces, with bearing pin, respectively lower connecting rod 2 and lower screw lock head 5, lower connecting rod 2 is connected as one with upper joint sleeve 1 with upper connecting rod 4 and upper connecting rod 4.The fiber bar anchor pole that installs anchor head is put into the anchor hole having bored, afterburning sleeve pipe is inserted in to fiber bar anchor pole, the lower end of upper joint sleeve pipe contacts with upper joint sleeve 1, then in the other end axial pressure of afterburning sleeve pipe, upper joint sleeve 1 can be along the axial unconfined movement of fiber bar under external force, upper connecting rod presses down lower connecting rod, is the open configuration shown in Fig. 2.Lower connecting rod 2 can penetrate in the crag of anchor hole along anchor hole radial translation under the effect of axial force with upper connecting rod 4, and upper and lower connecting rod expands rock mass simultaneously and cut out certain space in translation process, and after anchor head compacting, pressurization stops.Afterburning sleeve pipe takes out from hole; Then in hole, pour into inorganic grouting material slurries, while starting material filling, the outlet of stuffing pipe bottom is placed in to the about 20cm place, top of upper joint sleeve 1, perfusion limit, limit upwards lifts intrusion pipe, make the discharging opening of intrusion pipe be positioned at all the time about 500cm place under slurries, when filling inorganic material in anchor hole and having a small amount of slurries to overflow, stop grouting, extract grout pipe out.After inorganic material condenses, rockbolt installation all completes.
The utility model is usingd the rod body material of appearance shape of threads fiber bar as anchor pole, hinged upper lower connecting rod is installed in anchor pole bottom, by additional axial compression, upper lower connecting rod can radially outward be expanded along anchor hole, its expansion scope can reach the several times of anchor hole aperture, and can according to anchor pole, apply corresponding adjustment of load situation of rock stratum, to reach the object of economical and efficient.In anchor head process of expansion, also the corresponding rock stratum of anchor hole is expanded and cut out certain space, by grouting, gap forms again the branch of tree root shape, has further strengthened the resistance to plucking ability of anchor head.Compare with general grouting rock bolt like this, the anchoring efficiency of the present utility model for the anchor hole of same diameter will exceed several times.That is to say the anchoring efficiency that has played macropore due to brill aperture, so equal anchoring value drilling depth can significantly reduce.Because fiber bar is than exceeding 2-3 doubly with the powerful of diameter reinforcing bar, contrast conventional anchor pole, employing the utility model can be at the same anchoring effect of the little realization of the situation that reduces aperture and drilling depth, and expand and cut and the technique such as infusion and binding material owing to having adopted hole to open anchor head, bottom, three kinds of anchorage styles act on simultaneously, and the safety of anchoring, reliability and durability are more secure.
Claims (4)
1. for the large displacement expansion of the multi-branched anchor head fiber bar anchor pole of, severely-weathered rock stratum, it is characterized in that the threaded fiber bar of external surface is through the smooth upper joint sleeve of surfaces externally and internally, hypomere is connected with lower screw lock head thread, the internal diameter of upper joint sleeve is greater than the external diameter of fiber bar, and external diameter is less than anchor hole diameter; Hinged between connecting rod and a pair of lower link on fiber bar periphery a pair of, the other end of upper connecting rod and upper joint sleeve lower end are hinged, the upper articulation of the other end of lower link and lower screw lock head.
2. the large displacement expansion of the multi-branched for, severely-weathered rock stratum according to claim 1 anchor head fiber bar anchor pole, is characterized in that connecting rod (2) and lower link (4) adopt equal leg angle to make, the length of connecting rod be anchoring aperture 1.5-3 doubly.
3. the large displacement expansion of the multi-branched for, severely-weathered rock stratum according to claim 1 anchor head fiber bar anchor pole, is characterized in that lower screw lock head (5) external cylindrical surface diameter is less than the diameter of anchor hole, and it is conical that bottom is.
4. the large displacement expansion of the multi-branched for, severely-weathered rock stratum according to claim 1 anchor head fiber bar anchor pole, is characterized in that upper joint sleeve (2) is the smooth steel bushing of surfaces externally and internally.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420191181.6U CN203904992U (en) | 2014-04-18 | 2014-04-18 | Multi-branch large-displacement expansion anchor head fiber reinforcement anchor rod used in intermediate-strong weathered rock strata |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420191181.6U CN203904992U (en) | 2014-04-18 | 2014-04-18 | Multi-branch large-displacement expansion anchor head fiber reinforcement anchor rod used in intermediate-strong weathered rock strata |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203904992U true CN203904992U (en) | 2014-10-29 |
Family
ID=51779282
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420191181.6U Expired - Lifetime CN203904992U (en) | 2014-04-18 | 2014-04-18 | Multi-branch large-displacement expansion anchor head fiber reinforcement anchor rod used in intermediate-strong weathered rock strata |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203904992U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103953038A (en) * | 2014-04-18 | 2014-07-30 | 湖北省电力勘测设计院 | Multi-branch large-displacement expansion anchor head fiber rib anchor rod for medium and strong weathered rock formations |
| CN107620603A (en) * | 2017-09-26 | 2018-01-23 | 中国矿业大学 | A kind of novel slurry filling anchor pole with steel loop bar |
-
2014
- 2014-04-18 CN CN201420191181.6U patent/CN203904992U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103953038A (en) * | 2014-04-18 | 2014-07-30 | 湖北省电力勘测设计院 | Multi-branch large-displacement expansion anchor head fiber rib anchor rod for medium and strong weathered rock formations |
| CN107620603A (en) * | 2017-09-26 | 2018-01-23 | 中国矿业大学 | A kind of novel slurry filling anchor pole with steel loop bar |
| CN107620603B (en) * | 2017-09-26 | 2023-09-22 | 中国矿业大学 | Novel grouting anchor rod with steel loop bar |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 430040 1 new bridge four, Jin Yin Hu Street, Dongxihu District, Wuhan, Hubei Patentee after: POWERCHINA HUBEI ELECTRIC ENGINEERING Corp.,Ltd. Address before: 430040 No. 1 Xinqiao four road, Dongxihu District, Wuhan, Hubei Patentee before: HUBEI ELECTRIC POWER SURVEY & DESIGN INSTITUTE |
|
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 430040 1 new bridge four, Jin Yin Hu Street, Dongxihu District, Wuhan, Hubei Patentee after: Hubei Electric Power Planning, Design and Research Institute Co.,Ltd. Address before: 430040 1 new bridge four, Jin Yin Hu Street, Dongxihu District, Wuhan, Hubei Patentee before: POWERCHINA HUBEI ELECTRIC ENGINEERING Corp.,Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20141029 |