CN103953038A - Multi-branch large-displacement expansion anchor head fiber rib anchor rod for medium and strong weathered rock formations - Google Patents
Multi-branch large-displacement expansion anchor head fiber rib anchor rod for medium and strong weathered rock formations Download PDFInfo
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- CN103953038A CN103953038A CN201410157290.0A CN201410157290A CN103953038A CN 103953038 A CN103953038 A CN 103953038A CN 201410157290 A CN201410157290 A CN 201410157290A CN 103953038 A CN103953038 A CN 103953038A
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- anchor
- fiber rib
- fiber bar
- screw lock
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Abstract
The invention relates to a multi-branch large-displacement expansion anchor head fiber rib anchor rod for medium and strong weathered rock formations. A fiber rib with threads at the outer surface penetrates through an upper connection sleeve; the lower section of the fiber rib is in threaded connection with a lower screw lock; the inner diameter of the upper connection sleeve is larger than the outer diameter of the fiber rib; the outer diameter of the upper connection sleeve is smaller than the diameter of an anchor hole; one pair upper connection rods and one pair of lower connection rods are hinged; the other ends of the upper connection rods are hinged to the lower end of the upper connection sleeve; the other ends of the lower connection rods are hinged to the upper part of the lower screw lock; during use, the anchor hole is firstly drilled, the fiber rib with the threads at the outer surface is sectioned to a designed length, the lower end of the fiber rib is screwed into the lower screw lock; the bottom surface of the fiber rib is flush with the bottom surface of the lower screw lock, the fiber rib is placed in a drilled anchor hole, a forcing sleeve pipe sleeves the upper connection sleeve and is pressurized, the upper and lower connection rods are in an opening state and are inserted into the rock wall of the anchor hole, and grouting is performed after the forcing sleeve pipe is drawn out till grout is solidified. The multi-branch large-displacement expansion anchor head fiber rib anchor rod realizes triple anchoring of wedge fastening, chambering and adhering, the connection rods are adjustable in length, the expansion range of the anchor head is adjustable and the anchor rod is suitable for different rock formations.
Description
Technical field
The present invention 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 like this object that cost is low, anchoring efficiency is high.
In basic anchoring, once using for a long time more is Wedge-type anchor head, because the displacement amount of expansion 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.The problem such as should not control 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.So in anchoring field, rock stratum, exploitation can be by Trinitarian to wedge anchor, slip casting and bottom reaming multiple anchor pole, 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.The direction that anchoring field is explored so seek the substitution material of other suitable anchor rod bodies 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.Substituting reinforcing bar with fiber bar is following development trend as the rod body material of anchor pole, may have more unique using value at some special occasion fiber bars.
Summary of the invention
The object of the invention is for above-mentioned present situation, aim to provide one and can realize wedging, reaming and bonding triple anchoring, 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 object of the invention 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 present invention: first bore straight hole at anchoring position to projected depth, threaded external surface fiber bar 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, in the other end axial pressure of 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 penetrate in the crag of anchor hole with regard to anchor, 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 invention has the beneficial effects as follows:
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.
Brief description of the drawings
Fig. 1 be the hinged anchor head of the present invention in contraction state structural representation,
Fig. 2 is anchor head of the present invention expansion state structural representation at the bottom of anchor hole.
Detailed description of the invention
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, in the time that 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 invention 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 invention is described further.Reaming anchor head of the present invention 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 bore straight hole at anchoring position 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, 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 with bearing pin.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 be along anchor hole radial translation under the effect of axial force with upper connecting rod 4, penetrates in the crag of anchor hole, and upper and lower connecting rod expands rock mass simultaneously and cut out certain space in translation process, and when 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 rod body material of the present invention using 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 apply according to anchor pole corresponding adjustment of load situation of rock stratum, to reach the object of economical and efficient.In anchor head process of expansion, also corresponding anchor hole rock stratum 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.Compared with general grouting rock bolt, the anchoring efficiency of the present invention for the anchor hole of same diameter will exceed several times like this.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 present invention 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 safety, reliability and the durability of anchoring 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 |
|---|---|---|---|
| CN201410157290.0A CN103953038A (en) | 2014-04-18 | 2014-04-18 | Multi-branch large-displacement expansion anchor head fiber rib anchor rod for medium and strong weathered rock formations |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410157290.0A CN103953038A (en) | 2014-04-18 | 2014-04-18 | Multi-branch large-displacement expansion anchor head fiber rib anchor rod for medium and strong weathered rock formations |
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| CN103953038A true CN103953038A (en) | 2014-07-30 |
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| CN201410157290.0A Pending CN103953038A (en) | 2014-04-18 | 2014-04-18 | Multi-branch large-displacement expansion anchor head fiber rib anchor rod for medium and strong weathered rock formations |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107489176A (en) * | 2017-09-05 | 2017-12-19 | 彭桂皎 | A kind of embedded rigid anchor pile and counter-force balancing equipment and its engineering method and technical regulation |
| CN110004928A (en) * | 2019-04-29 | 2019-07-12 | 中国京冶工程技术有限公司厦门分公司 | It is a kind of to expand body anti-float anchor rod certainly |
| CN110670589A (en) * | 2019-10-29 | 2020-01-10 | 兰州交通大学 | Anchor rod and construction method thereof |
| CN112832234A (en) * | 2020-12-31 | 2021-05-25 | 山东大学 | Rotary expansion pile for foundation stabilization and construction method thereof |
| CN112921981A (en) * | 2021-01-29 | 2021-06-08 | 中建协和建设有限公司 | Construction method of anchoring structure and soil nailing wall supporting structure |
| CN113833383A (en) * | 2021-09-23 | 2021-12-24 | 浙江宏超建设集团有限公司 | Window joint structure and construction method thereof |
| CN115009428A (en) * | 2022-07-08 | 2022-09-06 | 浙江大学 | Autonomous anchoring robot for seabed stratum |
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| GB2315285A (en) * | 1996-07-12 | 1998-01-28 | Anthony Linden Powell | Ground anchor |
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| CN201411692Y (en) * | 2009-05-07 | 2010-02-24 | 中国京冶工程技术有限公司 | Polyfunctional anti-corrosion type controllable expansion extrusion soil body anchor rod |
| CN202866126U (en) * | 2012-10-24 | 2013-04-10 | 上海启鹏工程材料科技有限公司 | FRP (fiber-reinforced plastic) rib connection device and anchor rod |
| CN203904992U (en) * | 2014-04-18 | 2014-10-29 | 湖北省电力勘测设计院 | Multi-branch large-displacement expansion anchor head fiber reinforcement anchor rod used in intermediate-strong weathered rock strata |
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2014
- 2014-04-18 CN CN201410157290.0A patent/CN103953038A/en active Pending
Patent Citations (5)
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| GB2315285A (en) * | 1996-07-12 | 1998-01-28 | Anthony Linden Powell | Ground anchor |
| CN2451634Y (en) * | 2000-08-09 | 2001-10-03 | 合肥工业大学 | Expansion anchor |
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| CN203904992U (en) * | 2014-04-18 | 2014-10-29 | 湖北省电力勘测设计院 | Multi-branch large-displacement expansion anchor head fiber reinforcement anchor rod used in intermediate-strong weathered rock strata |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107489176A (en) * | 2017-09-05 | 2017-12-19 | 彭桂皎 | A kind of embedded rigid anchor pile and counter-force balancing equipment and its engineering method and technical regulation |
| CN110004928A (en) * | 2019-04-29 | 2019-07-12 | 中国京冶工程技术有限公司厦门分公司 | It is a kind of to expand body anti-float anchor rod certainly |
| CN110670589A (en) * | 2019-10-29 | 2020-01-10 | 兰州交通大学 | Anchor rod and construction method thereof |
| CN112832234A (en) * | 2020-12-31 | 2021-05-25 | 山东大学 | Rotary expansion pile for foundation stabilization and construction method thereof |
| CN112832234B (en) * | 2020-12-31 | 2022-04-12 | 山东大学 | Rotary expansion pile for foundation stabilization and construction method thereof |
| CN112921981A (en) * | 2021-01-29 | 2021-06-08 | 中建协和建设有限公司 | Construction method of anchoring structure and soil nailing wall supporting structure |
| CN113833383A (en) * | 2021-09-23 | 2021-12-24 | 浙江宏超建设集团有限公司 | Window joint structure and construction method thereof |
| CN115009428A (en) * | 2022-07-08 | 2022-09-06 | 浙江大学 | Autonomous anchoring robot for seabed stratum |
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Application publication date: 20140730 |