CN103883339A - Anchor cable supporting method for repeated application of prestress - Google Patents

Anchor cable supporting method for repeated application of prestress Download PDF

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Publication number
CN103883339A
CN103883339A CN201410144433.4A CN201410144433A CN103883339A CN 103883339 A CN103883339 A CN 103883339A CN 201410144433 A CN201410144433 A CN 201410144433A CN 103883339 A CN103883339 A CN 103883339A
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CN
China
Prior art keywords
anchor cable
anchor
anchored
cable
support bar
Prior art date
Application number
CN201410144433.4A
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Chinese (zh)
Other versions
CN103883339B (en
Inventor
施鑫镛
Original Assignee
衢州市优德工业设计有限公司
Priority date (The priority date 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 date listed.)
Filing date
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Application filed by 衢州市优德工业设计有限公司 filed Critical 衢州市优德工业设计有限公司
Priority to CN201410144433.4A priority Critical patent/CN103883339B/en
Priority claimed from CN201610022872.7A external-priority patent/CN105649663B/en
Priority claimed from CN201610022873.1A external-priority patent/CN105673054B/en
Publication of CN103883339A publication Critical patent/CN103883339A/en
Application granted granted Critical
Publication of CN103883339B publication Critical patent/CN103883339B/en

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Classifications

    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D20/00Setting anchoring-bolts
    • E21D20/02Setting anchoring-bolts with provisions for grouting
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D21/00Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection

Abstract

The invention discloses an anchor cable supporting method for repeated application of prestress. An anchor cable comprises an anchor cable body, an anchoring end anchoring device, a supporting plate and a lockset. The end, located outside a drill hole, of the anchor cable body is sequentially provided with the supporting plate and the lockset. The anchor cable is characterized in that a T-shaped pressing pipe is further arranged at the end, located outside the drill hole, of the anchor cable body, the supporting plate abuts against a wing plate of the T-shaped pressing pipe in a pressing mode, the portion, close to the inner end of the drill hole, of the anchor cable body is provided with the anchoring end anchoring device, a casing pipe is arranged at the position, at a certain distance of the upper portion of the anchoring end anchoring device, of the anchor cable body, an annular space is formed between the casing pipe and the anchor cable body, and the end, close to the anchoring end anchoring device, of the casing pipe is provided with a flexible grout stopper; after the anchor cable is installed, the end, located inside the drill hole, of the T-shaped pressing pipe abuts against the casing pipe in a sealing mode, and the anchoring end anchoring device can provide enough anchoring force so as to meet the requirement for repeatedly applying the prestress on the anchor cable. The anchor cable supporting method mainly comprises the steps of manufacturing and installing the anchor cable, conducting primary grouting, conducting secondary grouting and repeatedly applying the prestress. According to the anchor cable supporting method, the prestress can be repeatedly applied at the anchoring end with enough strength under the condition that an overall-length grouting solidification structure is not disturbed.

Description

One repeats to apply prestressed cable bolting method
Technical field
The present invention relates to mine surrounding rock supporting field, particularly a kind of mine laneway repeats to apply prestressed cable bolting method.
Background technology
Mine surrounding rock supporting is subterranean resource exploitation extremely important, the essential aspect lacking, field, coal mining Frequent Accidents in recent years, the accidents such as landslide, roof fall are continuous, to be that technical measures are not in place cause these accidents, do not take effective technical measures or technical measures effectively not to carry out, and pit mining surrounding rock supporting is enough, the accident that landslide waits country rock to produce can be avoided.In prior art, reinforce adjoining rock Main Means is bolting and rope support, grouting support, anchor rete cord combined supporting, hydraulic support stand, column supporting, reserved coal pillar or ore pillar, gob side entry retaining etc., Anchor cable-rod supporting is the general supporting means of this area, so those skilled in the art are constantly improving Anchor cable-rod supporting performance always, improve supporting effect, it is a major technique direction that prestress anchorage cable bolt support is set.
China's mine enters deep mining at present, surrounding rock supporting is even more important in recovery process, but implementing anchor pole, when cable bolting, for increasing anchor pole, the supporting effect of anchor cable, often one end slip casting of anchor pole rope is fixed on to country rock deep, then apply full-length prestress, but while applying prestressing force in prior art, often need first slip casting anchoring anchor cable boom end, then apply for the first time prestressing force, and then enforcement total length slip casting, finally carry out outer end mounting plate and apply prestressing force, so repeatedly disturbance surrounding rock supporting, and can make the injection slurry and the anchor cable bar that have solidified produce loosening, destroy slip casting slurry consolidated structure, bolt-grouting support effect structure is unsatisfactory.
Summary of the invention
The technical problem existing for solving prior art, the object of the invention is to provide a kind of at not disturbance total length slip casting consolidated structure and have the supporting method that repeats to apply prestressed anchor cable of the anchored end of sufficient intensity.
For solving the problems of the technologies described above, the present invention adopts following technical scheme:
One repeats to apply prestressed cable bolting method, and it comprises the steps:
1) fabrication and installation anchor cable: can repeat to apply prestressed anchor cable and comprise anchor cable body, anchored end anchor device, supporting plate, lockset, described anchor cable body is positioned at boring outer end and is provided with successively supporting plate and lockset, in anchor cable boring, outer end place is also provided with a T shape pressure pipe, supporting plate is pressed against on the wing plate of T shape pressure pipe, by boring the inner, described anchored end anchor device is set at anchor cable body, on the anchor cable body of a distance, described anchored end anchor device top, a sleeve pipe is set, between this sleeve pipe and anchor cable body, form an annular space, sleeve pipe is provided with flexible stop grouting plug near one end of described anchored end anchor device, when anchor cable is during finally in installation state, one end sealing that described T shape pressure pipe is positioned at boring is resisted against on described sleeve pipe,
2) anchor end of anchorage cable of slip casting anchoring first: in above-mentioned steps 1) after fabrication and installation are good, drive anchored end anchor device in running order, by Grouting Pipe, slip casting anchoring is carried out in anchor cable body bottom, described anchored end anchor device and slurries solidify one, for anchor cable improves enough anchored force;
3) secondary grouting: after waiting for that anchored end slurries fully solidify, continue the annular space between sleeve pipe and drill hole wall to carry out total length slip casting, carry out full length fastening;
4) repeat to apply prestressing force: after above-mentioned steps is implemented, can repeatedly repeat to apply prestressing force period in the outer end of anchor cable body in different supporting by lockset and draw-off gear, can the injecting cement paste having applied not produced and be destroyed and disturbance, prevent that supporting is loosening or lost efficacy, effectively safeguarding supporting and protection structure body.
Described anchored end anchor device in step 1) comprises the first fixed block, sliding shoe, the hook wing, the first support bar, the first fixed block is fixed on described anchor cable body the inner in deeply holing, sliding shoe is slidably arranged on the anchor cable body body of rod between sleeve pipe and the first fixed block, and the first support bar and the first fixed block, the hook wing and movable block, the first support bar and the hook wing all carry out being articulated and connected in relative rotation.
Described anchored end anchor device in step 1) also comprises the second fixed block and the second support bar, the second fixed block is close the first fixed block place between the first fixed block and sliding shoe, second support bar one end is hingedly connected on the pin joint of the first support bar and the hook wing, and the other end is hingedly connected on the second fixed block.
Step 2) described in running order comprising of driving anchored end anchor device: by pressure pipe being applied to jacking force and/or by drawing anchor cable body, sleeve pipe lower end being contacted with sliding shoe, drive the hook wing and the first support bar to open, the crotch of the hook wing is " U " shape to hell direction, in the time that the hook wing is in running order against drill hole wall, the anchored end of anchor cable body is carried out to slip casting, after slurry solidifies, the hook wing and the first support bar will firmly be anchored at boring inner end, and enough anchored force are provided.
Step 2) described in running order comprising of driving anchored end anchor device: by pressure pipe being applied to jacking force and/or by drawing anchor cable body, sleeve pipe lower end being contacted with sliding shoe, drive the hook wing, the first support bar and the second support bar to open, the crotch of the hook wing is " U " shape to hell direction, in the time that the hook wing is in running order against drill hole wall, the anchored end of anchor cable body is carried out to slip casting, after slurry solidifies, the hook wing, the first support bar and the second support bar will firmly be anchored at boring inner end, and enough anchored force are provided.
Described flexible stop grouting plug is flexible sealing rubber, and described sleeve pipe is pvc pipe or aluminum pipe.
Described T shape pressure pipe and sleeve pipe abutment end are provided with flanging outside pipe, and described flanging is provided with the annular groove docking with sleeve pipe, is provided with sealing ring in groove, and pressure pipe is connected with bobbin seal.
Shown in be also provided with a sealing mat between T shape pressure pipe and boring country rock wall, grouting serous fluid can not oozed out outside boring in a large number, play plugging action.
The invention has the beneficial effects as follows: the one, can make anchor cable repeat to apply prestressing force by sleeve pipe time, total length grouting and reinforcing body is not carried out to disturbance destruction, make like this solidified slurry can be fully and country rock body form entirety, one is born pressure from surrounding rock; The one, anchor end of anchorage cable adopts the scalable hook wing, both facilitated during anchor cable deeply holes, simultaneously in the time carrying out resin or slip casting anchoring, tightly be anchored at foot of hole, for repeatedly applying prestressing force, anchor cable provides enough anchored force, and anchored end is simple in structure, contribute to anchor cable that deeply boring is installed, simultaneously fully anchoring anchor cable of energy.Enough strong anchored force that anchored end anchor device provides and anchor cable are implemented to repeat prestressing force and are complemented each other, and there is no enough anchored force, and anchored end will be subject to heavy damage, be difficult to effectively form prestress anchorage cable.
Accompanying drawing explanation
Fig. 1: can repeat to apply prestress anchorage cable structural representation.
Fig. 2: T shape pressure pipe structural representation.
Fig. 3: anchored end anchor device improves structural representation.
The specific embodiment
Embodiment 1: shown in Fig. 1-2, anchor cable of the present invention is a kind of prestressing anchor support method needing that can repeat to apply in not disturbance injecting cement paste situation, described anchor cable comprises: anchor cable body 1, anchored end anchor device, sleeve pipe 6, pressure pipe 7, supporting plate 8, lockset 9, stop grouting plug 10, described anchored end anchor device comprises the first fixed block 2, sliding shoe 3, the hook wing 5, the first support bar 4, the first fixed block 2 is fixed on the inner that anchor cable body 1 gos deep in boring, sliding shoe 3 is slidably arranged on anchor cable body 1 body of rod between sleeve pipe 6 and the first fixed block 2, sleeve pipe 6 is arranged on movable block 3 a distance, upper end, so that movable block 3 has enough sliding extension distances in anchor cable is deeply holed time, be convenient in anchor cable deeply holes.As shown in Figure 1, the first support bar 4 and the first fixed block 2, the hook wing 5 all carry out relatively turnable being articulated and connected with movable block 3, the first support bar 4 with the hook wing 5.Sleeve pipe 6 is provided with stop grouting plug 10 near sliding shoe 3 one end, prevent that slurries enter in sleeve pipe 6 in the time of boring slip casting, pressure pipe 7 presses sleeve pipe 6 upper ends, by pressure pipe 7 being applied to jacking force or by primary drawing anchor cable body 1, sleeve pipe 6 lower ends being contacted with sliding shoe 3, drive the hook wing 5 and the first support bar 4 to open, the crotch of the hook wing 5 is " U " shape to hell direction, when the hook wing 5 is during against drill hole wall, the anchored end of anchor cable body 1 is carried out to first slip casting, after slurry solidifies, the hook wing 5 and the first support bar 4 will firmly be anchored at boring inner end, enough anchored force are provided.
After waiting for that anchored end slurries enough solidify, continue the annular space between sleeve pipe 6 and drill hole wall to carry out total length slip casting, by sleeve pipe 6, pressure pipe 7 and the tightly anchoring of boring country rock, because pressure pipe 7 has the extension outside hole at boring port, can also be between wing plate and wall, to add sealing mat 11 at the extension of pressure pipe 7 according to needing, make like this grouting serous fluid can not ooze out in a large number outside boring, play plugging action, obtain better slip casting effect.
After above-mentioned all slip casting finishes, repeatedly repeat to apply prestressing force in the outer end of anchor cable body 1 by lockset 8 and draw-off gear, can the injecting cement paste having applied not produced and be destroyed and disturbance like this, effectively safeguard supporting and protection structure body.
Stop grouting plug 10 adopts flexible sealing piece, for example, adopt caulking gum, and anchor cable is in the time repeating to apply prestressing force like this, and stretcher strain amount is unlikely to stop grouting plug 10 to destroy, and it allows anchor cable body 1 can carry out longitudinal stretching.
Sleeve pipe 6 can adopt pvc pipe, aluminum pipe or other lightweight tubing; Pressure pipe 7 is teeprofiles, and pipe thickness is more bigger than sleeve pipe 6, and pressure pipe 7 can arrange flanging with sleeve pipe 6 contact jaws outside pipe, and flanging is provided with the annular groove docking with sleeve pipe, is provided with sealing ring in groove, and pressure pipe is connected with bobbin seal.Sealing mat 11 is circular middle through holes with the diameter substantially equating with pressure pipe 7 external diameters.
Embodiment 2: shown in Fig. 3, the anchored end anchor device in embodiment 1 is further improved, other parts are identical with embodiment 1.Described anchored end anchor device is except comprising the first fixed block 2, sliding shoe 3, the hook wing 5, the first support bar 4, also comprise the second fixed block 13 and the second support bar 12, second support bar 12 one end are hingedly connected on the pin joint of the first support bar 4 and the hook wing 5, and the other end is hingedly connected on the second fixed block 13.By adding the second support bar 12 and the second fixed block 13, making the hook wing 5 can have enough support forces makes the hook wing 5 against hole wall, meanwhile, in the time of anchored end slip casting anchoring, the second support bar 12, the second fixed block 13 also provide stronger and the anchored force that combine together slurries.

Claims (8)

1. repeat to apply a prestressed cable bolting method, it comprises the steps:
1) fabrication and installation anchor cable: can repeat to apply prestressed anchor cable and comprise anchor cable body (1), anchored end anchor device, supporting plate (8), lockset (9), described anchor cable body (1) is positioned at boring outer end and sets gradually described supporting plate and lockset, in anchor cable boring, outer end place is also provided with a T shape pressure pipe (7), supporting plate is pressed against on the wing plate of T shape pressure pipe, by boring the inner, described anchored end anchor device is set at anchor cable body, one sleeve pipe (6) is set on the anchor cable body of a distance, described anchored end anchor device top, between this sleeve pipe and anchor cable body, form an annular space, sleeve pipe is provided with flexible stop grouting plug (10) near one end of described anchored end anchor device, when anchor cable is during finally in installation state, one end sealing that described T shape pressure pipe is positioned at boring is resisted against on described sleeve pipe,
2) anchor end of anchorage cable described in slip casting anchoring first: in above-mentioned steps 1) after fabrication and installation are good, drive anchored end anchor device in running order, by Grouting Pipe, slip casting anchoring is carried out in anchor cable body bottom, described anchored end anchor device and slurries are solidified as one, for anchor cable improves enough anchored force;
3) secondary grouting: after waiting for that anchored end slurries fully solidify, continue the annular space between sleeve pipe (6) and drill hole wall to carry out total length slip casting, carry out full length fastening;
4) repeat to apply prestressing force: after above-mentioned steps is implemented, can repeatedly repeat to apply prestressing force period in the outer end of anchor cable body (1) in different supporting by lockset (8) and draw-off gear, it can not produce and destroy and disturbance the injecting cement paste having applied, prevent that supporting is loosening or lost efficacy, effectively safeguarding supporting and protection structure body.
2. one kind is as claimed in claim 1ly repeated to apply prestressed cable bolting method, it is characterized in that: the described anchored end anchor device in step 1) comprises the first fixed block, sliding shoe, the hook wing, the first support bar, the first fixed block is fixed on described anchor cable body the inner in deeply holing, sliding shoe is slidably arranged on the anchor cable body body of rod between sleeve pipe and the first fixed block, and the first support bar and the first fixed block, the hook wing and movable block, the first support bar and the hook wing all carry out being articulated and connected in relative rotation.
3. one kind is as claimed in claim 2ly repeated to apply prestressed cable bolting method, it is characterized in that: the described anchored end anchor device in step 1) also comprises the second fixed block and the second support bar, the second fixed block is close the first fixed block place between the first fixed block and sliding shoe, second support bar one end is hingedly connected on the pin joint of the first support bar and the hook wing, and the other end is hingedly connected on the second fixed block.
4. one kind is as claimed in claim 2ly repeated to apply prestressed cable bolting method, it is characterized in that: step 2) described in running order comprising of driving anchored end anchor device: by pressure pipe (7) being applied to jacking force and/or by drawing anchor cable body (1), sleeve pipe (6) lower end being contacted with sliding shoe (3), drive the hook wing (5) and the first support bar (4) to open, the crotch of the hook wing (5) is " U " shape to hell direction, in the time that the hook wing (5) is in running order against drill hole wall, anchored end to anchor cable body (1) is carried out slip casting, after slurry solidifies, the hook wing (5) and the first support bar (4) will firmly be anchored at boring inner end, enough anchored force are provided.
5. one kind is repeated to apply prestressed cable bolting method as claimed in claim 2 or claim 3, it is characterized in that: step 2) described in running order comprising of driving anchored end anchor device: by pressure pipe (7) being applied to jacking force and/or by drawing anchor cable body (1), sleeve pipe (6) lower end being contacted with sliding shoe (3), drive the hook wing (5), the first support bar (4) and the second support bar (12) open, the crotch of the hook wing (5) is " U " shape to hell direction, in the time that the hook wing (5) is in running order against drill hole wall, anchored end to anchor cable body (1) is carried out slip casting, after slurry solidifies, the hook wing (5), the first support bar (4) and the second support bar (12) will firmly be anchored at boring inner end, enough anchored force are provided.
6. as claimed in claim 1ly repeat to apply a prestressed cable bolting method, it is characterized in that: described in to state flexible stop grouting plug be flexible sealing rubber, described sleeve pipe is pvc pipe or aluminum pipe.
7. one kind is as claimed in claim 1ly repeated to apply prestressed cable bolting method, it is characterized in that: described T shape pressure pipe and sleeve pipe abutment end are provided with flanging outside pipe, described flanging is provided with the annular groove docking with sleeve pipe, is provided with sealing ring in groove, and pressure pipe is connected with bobbin seal.
8. repeating as described in claim 1 or 5 applies a prestressed cable bolting method, it is characterized in that: shown in be also provided with a sealing mat between T shape pressure pipe and boring country rock wall, grouting serous fluid can not oozed out outside boring in a large number, play plugging action.
CN201410144433.4A 2014-04-11 2014-04-11 A kind of cable bolting method repeating Shi Hanzhang CN103883339B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201410144433.4A CN103883339B (en) 2014-04-11 2014-04-11 A kind of cable bolting method repeating Shi Hanzhang

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
CN201610022874.6A CN105507929B (en) 2014-04-11 2014-04-11 A kind of method that repetition applies prestressed cable bolting
CN201610022872.7A CN105649663B (en) 2014-04-11 2014-04-11 One kind, which has, to be repeated to apply prestressed cable bolting method
CN201610022871.2A CN105626109B (en) 2014-04-11 2014-04-11 It is a kind of that there is the method for repeating to apply prestressed cable bolting
CN201610022873.1A CN105673054B (en) 2014-04-11 2014-04-11 A kind of repetition applies the method for protecting support of prestressed anchor cable
CN201410144433.4A CN103883339B (en) 2014-04-11 2014-04-11 A kind of cable bolting method repeating Shi Hanzhang

Related Child Applications (4)

Application Number Title Priority Date Filing Date
CN201610022872.7A Division CN105649663B (en) 2014-04-11 2014-04-11 One kind, which has, to be repeated to apply prestressed cable bolting method
CN201610022873.1A Division CN105673054B (en) 2014-04-11 2014-04-11 A kind of repetition applies the method for protecting support of prestressed anchor cable
CN201610022874.6A Division CN105507929B (en) 2014-04-11 2014-04-11 A kind of method that repetition applies prestressed cable bolting
CN201610022871.2A Division CN105626109B (en) 2014-04-11 2014-04-11 It is a kind of that there is the method for repeating to apply prestressed cable bolting

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CN103883339A true CN103883339A (en) 2014-06-25
CN103883339B CN103883339B (en) 2016-03-23

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CN201610022871.2A CN105626109B (en) 2014-04-11 2014-04-11 It is a kind of that there is the method for repeating to apply prestressed cable bolting
CN201410144433.4A CN103883339B (en) 2014-04-11 2014-04-11 A kind of cable bolting method repeating Shi Hanzhang
CN201610022874.6A CN105507929B (en) 2014-04-11 2014-04-11 A kind of method that repetition applies prestressed cable bolting

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CN106638625A (en) * 2016-11-02 2017-05-10 中国十七冶集团有限公司 Construction method capable of enabling tensioning to be conducted again after failure of prestress of anchor cable

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CN106638625B (en) * 2016-11-02 2018-08-17 中国十七冶集团有限公司 After a kind of failure of prestressd anchor cable can tensioning again construction method

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CN105507929A (en) 2016-04-20
CN105507929B (en) 2017-09-01
CN105626109A (en) 2016-06-01
CN103883339B (en) 2016-03-23
CN105626109B (en) 2017-09-15

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