CN108756970B - Sectional hollow grouting anchor cable and use method - Google Patents
Sectional hollow grouting anchor cable and use method Download PDFInfo
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- CN108756970B CN108756970B CN201810764089.7A CN201810764089A CN108756970B CN 108756970 B CN108756970 B CN 108756970B CN 201810764089 A CN201810764089 A CN 201810764089A CN 108756970 B CN108756970 B CN 108756970B
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- 238000000034 method Methods 0.000 title claims abstract description 25
- 239000002002 slurry Substances 0.000 claims abstract description 157
- 238000007789 sealing Methods 0.000 claims abstract description 133
- 239000011435 rock Substances 0.000 claims description 27
- 239000004677 Nylon Substances 0.000 claims description 24
- 229920001778 nylon Polymers 0.000 claims description 24
- 239000000126 substance Substances 0.000 claims description 19
- 238000005553 drilling Methods 0.000 claims description 15
- 238000004873 anchoring Methods 0.000 claims description 14
- 229920003023 plastic Polymers 0.000 claims description 11
- 239000004033 plastic Substances 0.000 claims description 7
- 239000011521 glass Substances 0.000 claims description 6
- 238000004080 punching Methods 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 239000000314 lubricant Substances 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 230000000903 blocking effect Effects 0.000 claims 1
- 239000011248 coating agent Substances 0.000 claims 1
- 238000000576 coating method Methods 0.000 claims 1
- 230000003014 reinforcing effect Effects 0.000 claims 1
- 238000007569 slipcasting Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 9
- 230000007547 defect Effects 0.000 abstract description 4
- 238000004026 adhesive bonding Methods 0.000 description 10
- 239000003795 chemical substances by application Substances 0.000 description 9
- 230000003068 static effect Effects 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 238000005461 lubrication Methods 0.000 description 6
- 230000002787 reinforcement Effects 0.000 description 5
- 230000007246 mechanism Effects 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 239000002390 adhesive tape Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 239000011440 grout Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229920002635 polyurethane Polymers 0.000 description 2
- 239000004814 polyurethane Substances 0.000 description 2
- 230000035484 reaction time Effects 0.000 description 2
- 230000011218 segmentation Effects 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 239000004568 cement Substances 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 239000004035 construction material Substances 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/02—Setting anchoring-bolts with provisions for grouting
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Piles And Underground Anchors (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention relates to the field of geotechnical engineering support, in particular to a sectional hollow grouting anchor cable and a use method thereof, wherein the sectional hollow grouting anchor cable comprises an anchor cable body and a sectional hole sealing device, the anchor cable body comprises a cable body (1), a tail body nut (2) and a base plate (3), the base plate (3) is arranged on the cable body (1), and the tail body nut (2) is connected to the cable body (1) at one side of the base plate (3) through threads; the sectional hole sealing device comprises a hole sealing plug (7) arranged on the cable body (1); a sleeve (5) is sleeved on the outer side of the hole sealing plug (7), and a fixing frame (6) is sleeved on one side of the sleeve (5); a slurry fixing bag is arranged in the fixing frame (6). The grouting anchor cable has the advantages of simple structure and convenient processing, overcomes the defects of the existing grouting anchor cable, solves the problems of poor grouting effect and the like of the existing grouting anchor cable, improves the working efficiency and reduces the supporting cost.
Description
Technical Field
The invention belongs to the technical field of geotechnical engineering support, and particularly relates to a sectional hollow grouting anchor cable and a use method thereof.
Background
Geotechnical engineering such as subways, tunnels, side slopes, roadways, culverts, dams and the like is one of the most common preferred methods when geological fracture zones, partial soft rocks, easily-falling ledge, landslide instability, large deformation, danger of water discharge or water burst, piping and the like are encountered, and grouting reinforcement is achieved by grouting anchor cables, grouting anchor rods and the like and by utilizing the bonding and coagulation mechanisms of grouting slurry and the like, so that surrounding rock reinforcement is achieved, and the effects of supporting, water shutoff and the like are remarkably improved.
The existing problems of the grouting anchor cable are that: by adopting the anchor cable grouting, the hole depth can even reach hundreds of meters, and the grouting liquid injected into the deep hole or the geological compaction section is less, so that the grouting liquid is spread and permeated unevenly, and weak surfaces exist, so that water seepage, water burst, falling and landslide and the like are possible. The current solution is re-injection, encryption drilling and the like, which causes huge engineering quantity and is difficult to meet the safety requirement.
Disclosure of Invention
In order to make up the defects of the prior art, the segmented hollow grouting anchor cable and the use method thereof provided by the invention solve the problems that the existing anchor cable cannot perform segmented grouting reinforcement on deep surrounding rock, are beneficial to improving grouting quantity of cracks of deep rock stratum, remarkably improve grouting reinforcement or plugging effect, prevent uneven grouting or non-ideal support after grouting caused by shallow grouting and the like.
The technical scheme adopted for solving the technical problems is as follows: the sectional hollow grouting anchor cable comprises an anchor cable body and a sectional hole sealing device, wherein the anchor cable body comprises a cable body, a body nut and a base plate (tray), the base plate is arranged on the cable body, and a tail body nut is connected on one side of the base plate through threads on the cable body; the sectional hole sealing device comprises a hole sealing plug arranged on the cable body; a sleeve is sleeved on the outer side of the hole sealing plug, and a fixing frame is sleeved on one side of the sleeve; the inside of the fixed frame is provided with a slurry fixing bag.
Preferably, the cable body consists of a steel strand and a grouting pipe; the sleeve can be a plastic sleeve or a chemical glass sleeve, and has certain strength and brittleness; the slurry fixing bag comprises an outer slurry fixing bag, an inner slurry fixing bag is arranged in the outer slurry fixing bag, and a nylon sticking buckle tape is arranged between the inner slurry fixing bag and the outer slurry fixing bag; the nylon fastening tape is connected with an operation rope.
Preferably, the number of the sectional hole sealing devices is one, two or N, the cable body is divided into two, three or N+1 areas, two areas are preferably selected, namely a grouting area A, a grouting area B and a grouting area C, the grouting area A is from the tail end of the cable body to the top end of a fixed frame of the first hole sealing device, the grouting area B is from the top end of the fixed frame of the first hole sealing device to the top end of the fixed frame of the second hole sealing device, the grouting area C is from the top end of the fixed frame of the second hole sealing device to the front end of the cable body, and the grouting sequence is from section C to section B to section A.
Preferably, the cable body is provided with a through grouting hole; and a slurry outlet hole is formed in the position, corresponding to the hole sealing device, of the cable body, lubrication is arranged between the hole sealing plug and the slurry outlet hole of the cable body, so that the slurry outlet plug can move up and down along the cable body, and the sleeve is matched with the hole sealing plug.
And the grouting areas B and A are equal in size and number, and the thickness of the sleeve is different between the areas B and A.
The sectional hollow grouting anchor cable further comprises a slurry outlet mechanism for controlling slurry to flow, wherein the slurry outlet mechanism comprises a top cover arranged at the top end of the cable body, and a second through hole is formed in the side wall of the cable body; the piston is arranged in the second through hole and consists of a conical hole, a tail part, a middle part and a head part, the head part of the piston is of a truncated cone-shaped structure, the inclination angle of the side wall is 45 degrees (or the middle part of the piston is of a truncated cone-shaped structure according to an anchor rope structure), and the inclination angle of the side wall is 8-15 degrees (or the middle part of the piston is properly adjusted according to the anchor rope structure).
The application method of the sectional type hollow grouting anchor cable comprises two hole sealing modes, and the application method specifically comprises the following steps:
first hole sealing mode: an inner slurry fixing bag is sleeved in a cylindrical outer slurry fixing bag, chemical slurry A is placed in the inner slurry fixing bag, and chemical slurry B is placed in the outer slurry fixing bag; the side wall of the inner slurry fixing bag is provided with an opening, the opening is sealed by a nylon thread gluing belt, and an operation rope is tied at the port of the nylon thread gluing belt; pulling the operation rope to pull the nylon fastening tape, so that the contained chemical slurry A is mixed with the chemical slurry B in the external slurry fixing bag through the pulling of the operation rope, and the expansion sectional hole sealing is realized;
the second hole sealing mode is as follows: and (3) placing a static expanding agent (or expansion cement and other similar materials) with a corresponding dosage in the slurry fixing bag, wherein the dosage is 0.9-1.3kg/m (or the dosage is determined according to the material property), mixing the static expanding agent with a proper amount of water to form flowing slurry, and after waiting for a period of reaction time, generating larger expansion pressure on the hole wall along the radial direction under the restraint of the hole wall due to the self expansion effect of the static expanding agent, so as to realize hole sealing segmentation.
Preferably, the diameter of the inner slurry fixing bag in the first hole sealing mode is smaller than the diameter and the length of the drilled hole.
Preferably, the slurry outlet mode of the first hole sealing mode is as follows: the fixed frame is divided into two parts, two or more screws penetrate through small holes on the upper side of the fixed frame, two screws are preferentially selected, the fixed frame is pre-fastened on a rope body through nuts, the outer slurry fixing bag is fixed on the rope body through a rope knot, the outer wall of the fixed frame is made of transparent plastic, the slurry fixing bag is prevented from being damaged by rocks in the process of anchoring the rope body, the diameter of a hole sealing plug is 6mm (or is properly adjusted according to an anchor rope structure), the hole sealing plug is stably combined with slurry outlet Kong Peitao, and lubrication is provided between the hole sealing plug and the outer slurry fixing bag; the slurry outlet holes are arranged at intervals of 150mm (or are properly adjusted according to the anchor cable structure), the slurry outlet holes are only arranged below the sectional hole sealing device arranged on the cable body, and the slurry outlet holes are not arranged at the position of 1000mm (or are properly adjusted according to the anchor cable structure) at the tail end of each stage; the sleeve is hollow, has a diameter larger than that of the cable body, is arranged in a slurry outlet hole area of the cable body, and has a length covering each stage of slurry outlet hole area and is matched with the hole sealing plug so as not to slide up and down; the sleeve is only installed in the area B and the area A, and the thickness of the sleeve installed in the area A is larger than that of the sleeve installed in the area B; ensuring that the pressure of the pulp outlet burst of the area A is different.
Preferably, the other slurry outlet mode of the first hole sealing mode is: the fixed frame is divided into two parts, two or more screws penetrate through small holes on the upper side of the fixed frame, two nuts are preferentially selected, the nuts are pre-fastened and fixed on the rope body, the outer slurry fixing bag is fixed on the rope body through a rope knot, the outer wall of the fixed frame is made of transparent plastics, the slurry fixing bag is prevented from being damaged by rocks in the process of anchoring the rope body, the diameter of the hole sealing plug is 6mm (or is properly adjusted according to an anchor rope structure), the hole sealing plug is stably combined with the slurry outlet Kong Peitao, and lubrication is arranged between the two slurry fixing bags; the slurry outlet holes are arranged at intervals of 150mm (or are properly adjusted according to the anchor cable structure), the slurry outlet holes are only arranged below the sectional hole sealing device arranged on the cable body, and the slurry outlet holes are not arranged at the position of 1000mm (or are properly adjusted according to the anchor cable structure) at the tail end of each stage; tying operation ropes at the upper ends of the hole sealing plugs, and finally rotating the operation ropes of all the hole sealing plugs in the grouting area A, B and the grouting area C into a rope; when the operating rope is pulled downwards, the hole sealing plugs of the whole slurry outlet area are completely torn off.
The beneficial effects of the invention are as follows:
1. the grouting anchor cable has the advantages of simple structure and convenient processing, overcomes the defects of the existing grouting anchor cable, solves the problems of poor grouting effect and the like of the existing grouting anchor cable for supporting, improves the working efficiency, reduces the supporting cost and reduces the investment of manpower and material resources;
2. the sectional hole sealing process solves the problems of non-ideal grouting effect and the like of shallow layer grouting when grouting reinforcement is carried out on deep layer rock, and realizes the grouting of different areas in a targeted manner; the safety effect is obviously improved; the situation that the construction purpose cannot be achieved due to factors such as construction materials is avoided; the structural integrity of the broken surrounding rock is improved. And the full-length anchoring of the hollow grouting anchor cable is enhanced.
Drawings
The invention is further described below with reference to the accompanying drawings.
Fig. 1 is an overall construction diagram of a grouting anchor cable of the present invention;
FIG. 2 is a schematic illustration of the connection of an outer slurry-curing bag with an inner slurry-curing bag according to the present invention;
FIG. 3 is a schematic view of the structure of the sealing plug of the present invention;
FIG. 4 is a schematic view of the sleeve structure of the present invention;
FIG. 5 is a schematic view of a fixed frame structure of the present invention;
FIG. 6 is a schematic view of a mounting frame of the present invention;
FIG. 7 is a schematic illustration of cable grouting in accordance with the present invention;
FIG. 8 is a schematic diagram of the piston structure of the present invention;
fig. 9 is a schematic cross-sectional view of a piston according to the present invention.
In the figure: 1. the cable body comprises a cable body, a tail body nut, a sleeve, a backing plate, a fixed frame, a sealing plug, an operating rope, a drilling hole, an outer slurry fixing bag, an inner slurry fixing bag, a nylon adhesive tape and a cable body, wherein the cable body, the tail body nut, the sleeve, the backing plate, the rock, the sleeve, the fixed frame, the sealing plug, the operating rope, the drilling hole, the outer slurry fixing bag, the inner slurry fixing bag and the nylon adhesive tape are arranged in sequence, and the cable body is provided with the cable body, the tail body nut, the sleeve, the backing plate, the fixing frame, the rock, the sleeve and the fixing frame; 25. top cap, 26, grouting pump, 27, second through hole, 28, piston, 28a, taper hole, 28b, afterbody, 28c, middle part, 28d, head.
Detailed Description
The invention is further described in connection with the following detailed description in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the invention easy to understand.
As shown in fig. 1 to 6, a sectional hollow grouting anchor cable comprises an anchor cable body and a sectional hole sealing device, wherein the anchor cable body comprises a cable body 1, a tail body nut 2 and a base plate 3, the base plate 3 is installed on the cable body 1, and the tail body nut 2 is connected to the cable body 1 on one side of the base plate 3 through threads; the sectional hole sealing device comprises a hole sealing plug 7 arranged on the cable body; a sleeve 5 is sleeved on the outer side of the hole sealing plug 7, and a fixed frame 6 is sleeved on one side of the sleeve 5; a slurry fixing bag is arranged in the fixing frame 6.
As another embodiment of the invention, the cable body consists of a steel strand and a grouting pipe; the sleeve can be a plastic sleeve or a chemical glass sleeve, and has certain strength and brittleness; the slurry fixing bag comprises an outer slurry fixing bag 10, an inner slurry fixing bag 11 is arranged in the outer slurry fixing bag 10, and a nylon fastening tape 12 is arranged between the inner slurry fixing bag 11 and the outer slurry fixing bag 10; the nylon fastening tape 12 is connected with an operation rope 8.
As one embodiment of the present invention, the two segmented hole sealing devices divide the cable body 1 into three areas, namely a grouting area a, a grouting area B and a grouting area C, wherein the grouting area a is the tail end of the cable body 1 to the top end of the fixed frame 6 of the first hole sealing device, the B is the top end of the fixed frame 6 of the first hole sealing device to the top end of the fixed frame 6 of the second hole sealing device, and the C is the top end of the fixed frame 6 of the second hole sealing device to the front end of the cable body 1; the grouting sequence is from section C to section B to section A.
The cable body 1 is provided with a through grouting hole; the cable body department that hole sealing device corresponds is equipped with the apopore, there is lubrication between hole sealing stopper 7 and the apopore of cable body 1 makes the hole sealing stopper can reciprocate along the cable body, sleeve pipe 5 cooperatees with hole sealing stopper 7 and overlaps.
And the grouting areas B and A are equal in size and number, and the plastic glass sleeves in the areas B and A are different in thickness.
The grouting mechanism comprises a top cover 25 arranged at the top end of the cable body 1, and a second through hole 27 is formed in the side wall of the cable body 1; the piston 28 is installed inside the second through hole 27, and the piston 28 is composed of a conical hole 28a, a tail portion 28b, a middle portion 28c and a head portion 28d, the head portion 28d of the piston 28 is of a truncated cone-shaped structure, the inclination angle of the side wall is 45 degrees, the middle portion 28c of the piston 28 is of a truncated cone-shaped structure, the inclination angle of the side wall is 8-15 degrees, and the polyurethane piston rubber piston is in the pressure increasing process of the anchor cable inner space when the inclination angle of the side wall is 8-10 degrees, and when the pressure is applied to be 1-3MPA, the tail portion hole of the piston 28 is compressed and deformed, so that the piston is punched out. In the process of increasing the pressure of the inner space of the anchor cable when the inclination angle of the side wall of the polyurethane piston rubber piston is 11-15 degrees, when the applied pressure is more than 5MPA, the tail hole of the piston 28 is compressed and deformed, so that the piston 28 is punched out. A grouting pump 26 is connected in the rope 1.
The application method of the sectional type hollow grouting anchor cable comprises two hole sealing modes, and the application method specifically comprises the following steps:
first hole sealing mode: a cylindrical outer slurry fixing bag is sleeved with an inner slurry fixing cloth bag, chemical slurry A is placed in an inner slurry fixing bag 11, and chemical slurry B is placed in an outer slurry fixing bag 10; the side wall of the inner slurry fixing bag is provided with an opening, the opening is sealed by a nylon thread gluing belt 12, and an operation rope 8 is tied at the upper port of the nylon thread gluing belt 12; the operation rope 8 is pulled to pull the nylon fastening tape 12, so that the contained chemical slurry A is mixed with the chemical slurry B in the external slurry fixing bag 10 through the pulling of the operation rope 8, and the expansion sectional hole sealing is realized.
The second hole sealing mode is as follows: and (3) placing a static expanding agent with a corresponding dosage of 0.9-1.3kg/m into the slurry fixing bag, mixing the slurry with a proper amount of water to form a flowing slurry, and after waiting for a period of reaction time, generating larger expansion pressure on the hole wall along the radial direction under the restraint of the hole wall due to the expansion effect of the static expanding agent, so as to realize hole sealing segmentation.
As an embodiment of the present invention, the diameter of the internal slurry fixing bag 11 in the first hole sealing mode is smaller than the diameter and length of the drilled hole.
As an embodiment of the present invention, the slurry discharging method of the first hole sealing method: the fixing frame is divided into two parts, two screws penetrate through small holes on the upper side of the fixing frame, nuts are pre-fastened and fixed on the rope body, the outer slurry fixing bag 10 is fixed on the rope body 1 through a rope knot, transparent plastic is arranged on the outer wall of the fixing frame 6 to ensure that the slurry fixing bag is not damaged by rock in the anchoring process of the rope body 1, the diameter of the hole sealing plug 7 is 6mm, the hole sealing plug is stably combined with slurry outlet Kong Peitao, and lubrication is arranged between the hole sealing plug and the slurry outlet Kong Peitao; the slurry outlet interval is 150mm, the slurry outlet is only arranged below the sectional hole sealing device arranged on the cable body 1, and the slurry outlet is not arranged at the position of 1000mm at the tail end of each stage; the sleeve 5 is hollow, has a diameter larger than that of the cable body 1, is arranged in a slurry outlet area of the cable body 1, and has a length covering each stage of slurry outlet area and is matched with the hole sealing plug 7 so as not to slide up and down; the plastic 5 is only installed in the area B and the area A, and the thickness of the sleeve 5 installed in the area A is larger than that installed in the area B; ensuring that the pressure of the pulp outlet burst of the area A is different.
As an embodiment of the present invention, another slurry discharging mode of the first hole sealing mode: the fixing frame 6 is divided into two parts, two screws penetrate through small holes on the upper side of the fixing frame 6 and are pre-fastened on the rope body 1 through nuts, the outer slurry fixing bag 10 is fixed on the rope body 1 through a rope knot, transparent plastic is arranged on the outer wall of the fixing frame 6 to ensure that the slurry fixing bag is not damaged by rock in the anchoring process of the rope body 1, the diameter of the hole sealing plug 7 is 6mm, the hole sealing plug is stably combined with slurry outlet Kong Peitao, and lubrication is arranged between the hole sealing plug 7 and the slurry outlet Kong Peitao; the slurry outlet interval is 150mm, the slurry outlet is only arranged below the sectional hole sealing device arranged on the cable body 1, and the slurry outlet is not arranged at the position of 1000mm at the tail end of each stage; tying an operation rope 8 at the upper end of the hole sealing plug 7, and finally rotating the operation ropes of all the hole sealing plugs in the areas A, B and C into a rope; when the operating cord is pulled down, the entire sealing plugs 7 of the slurry outlet area are pulled off.
The nylon fastening tape 12 is pulled by pulling the operation rope 8, and the chemical slurry A in the inner slurry fixing bag 11 is mixed with the chemical slurry B in the outer slurry fixing bag 12, so that the two slurries react and expand to seal holes, and the purpose of sectionally sealing holes is achieved. The outer slurry fixing bag 10 is not damaged by the rock 4 through the fixing frame 6, the slurry outlet hole of each stage is matched with a hole sealing plug 7 which is stably combined with the slurry outlet hole, the slurry outlet hole is lubricated among the slurry outlet holes, the slurry outlet holes are except for the slurry outlet holes, the slurry outlet holes are covered with the corresponding sleeve 5, the thickness of the sleeve 5 in the region of the grouting region B, A is different, and the pressure of the slurry for breaking the hole sealing plug 7 is different from that of the sleeve 5. After grouting, the B, A area is not grouted, C grouting is firstly performed, and the slurry is not reflowed due to the sectional hole sealing device and the grouting holes at the top end. The B, A portion is then broken, thereby achieving the segmented grouting of the present invention. Therefore, the problem that surrounding rock is difficult to support due to poor geological conditions is solved, homogenization of slurry around the anchor cable body is realized, the surrounding rock and the slurry are fully bonded to form a whole, the defect of insufficient grouting of a common grouting anchor cable is effectively overcome, sealing of the surrounding rock is completed, falling of the surrounding rock is prevented, and timely support can be realized.
Embodiment one:
a1, assembling a sectional hole sealing device: the inner slurry fixing bag 11 is partially opened, a nylon thread gluing tape 12 is arranged at the opening, the upper end of the nylon thread gluing tape 12 is connected with the operation rope 8, so that the operation rope 8 can pull the nylon thread gluing tape 12 open in future, the inner slurry fixing bag 11 is filled with chemical slurry A, and the outer slurry fixing bag 10 is filled with chemical slurry B. The inner slurry fixing bag 11 is connected with the outer slurry fixing bag 10 in a rope knot mode, and the operation rope 8 is led out from the rope knot, so that the operation rope can be operated freely without being influenced. The rope section is tied between the reserved areas between the C and the B and between the B and the A, so that the rope section is stable, the fixing frame 6 is installed to be tightly fastened with the nuts, and the sectional hole sealing device is installed.
A2, sealing out slurry holes: the sealing plug 7 is coated with lubricant and is blocked on slurry outlet holes of the areas B and A, the area A is sleeved with a thicker sleeve 5, the area B is sleeved with a thinner sleeve 5, and the tightness of the sealing plug is ensured.
A3, punching: drilling a hole 9 for supporting in a roadway, reserving a preset C, B grouting area length at the front section of the cable body, and simultaneously installing a sectional hole sealing device between C and B and between the reserved lengths of B and A so as to fix the sectional hole sealing device on the anchor cable body 1, thereby ensuring the length of a good operation rope.
A4, anchoring: the grouting anchor cable is placed into the drilling hole 9, and the end fixing is carried out by using the hollow sectional grouting anchor cable through mechanical or resin.
A5, grouting: the operation rope 8 of the sectional hole sealing device is pulled to seal holes in areas, grouting is then carried out, and as the thickness of the sleeve 5 in the area B is different from that of the sleeve 5 in the area A, the sleeve 5 in the area B is firstly punched after grouting in the area C, so that the sequence of C, B, A grouting is different, broken surrounding rock is reinforced after the grouting is solidified, and the structural integrity of the broken surrounding rock is improved. And the full-length anchoring of the hollow grouting anchor cable is enhanced.
Embodiment two: (second hole sealing method)
B1, assembling a sectional hole sealing device: mixing 0.9-1.3kg/m of static expanding agent with proper amount of water to form flowing slurry, filling the flowing slurry mixed by the two into an external slurry fixing bag 10, tying the rope section between reserved areas between C and B and between B and A to stabilize the rope section, installing a fixing frame 6 to tighten nuts, ensuring tightness of the fixing frame, and completing the installation of the sectional hole sealing device.
B2, sealing slurry holes: the sealing plug 7 is coated with lubricant and is blocked on slurry outlet holes of the areas B and A, the area A is sleeved with a thicker sleeve 5, the area B is sleeved with a thinner sleeve 5, and the tightness of the sealing plug is ensured.
B3, punching: drilling a hole 9 for supporting in a roadway, reserving a preset C, B grouting area length at the front section of the cable body, and simultaneously installing a sectional hole sealing device between C and B and between the reserved lengths of B and A so as to fix the sectional hole sealing device on the anchor cable body 1, thereby ensuring the length of a good operation rope.
B4, anchoring: the grouting anchor cable is placed into the drilling hole 9, and the end fixing is carried out by using the hollow sectional grouting anchor cable through mechanical or resin.
B5, grouting: after the static expanding agent reacts, hole sealing of the segmented area is completed, grouting is then carried out, and as the thicknesses of the sleeve 5 in the area B and the sleeve 5 in the area A are different, the plastic glass sleeve 5 in the area B is firstly punched after grouting in the area C is completed by the grout, so that the sequence of C, B, A grouting is ensured to be different, broken surrounding rock is reinforced after the grout is solidified, and the structural integrity of the broken surrounding rock is improved. And the full-length anchoring of the hollow grouting anchor cable is enhanced.
Embodiment III:
c1, assembling a sectional hole sealing device: the inner slurry fixing bag 11 is partially opened, a nylon thread gluing tape 12 is arranged at the opening, the upper end of the nylon thread gluing tape 12 is connected with the operation rope 8, so that the operation rope 8 can pull the nylon thread gluing tape 12 open in future, the inner slurry fixing bag 11 is filled with chemical slurry A, and the outer slurry fixing bag 10 is filled with chemical slurry B. The inner slurry fixing bag 11 is connected with the outer slurry fixing bag 10 in a rope knot mode, and the operation rope 8 is led out from the rope knot, so that the operation rope can be operated freely without being influenced. The rope section is tied between the reserved areas between the C and the B and between the B and the A, so that the rope section is stable, the fixing frame 6 is installed to be tightly fastened with the nuts, and the sectional hole sealing device is installed.
And C2, sealing out slurry holes: an operation rope (a steel wire thin wire) is tied on the top end of the hole sealing plug 7 and is blocked on the slurry outlet holes in the areas B and A, so that the tightness of the slurry outlet holes is ensured. The length of the sealing plug 7 is contacted with the drilling hole 9 due to the grouting pressure, so that the grouting hole is sealed.
C3, punching: drilling a hole 9 for supporting in a roadway, reserving a preset C, B grouting area length at the front section of the cable body, and simultaneously installing a sectional hole sealing device between C and B and between the reserved lengths of B and A so as to fix the sectional hole sealing device on the anchor cable body 1, thereby ensuring the length of a good operation rope.
C4, anchoring: the grouting anchor cable is placed into the drilling hole 9, and the end fixing is carried out by using the hollow sectional grouting anchor cable through mechanical or resin.
And C5, grouting: the operation rope 8 of the sectional hole sealing device is pulled to seal holes in the areas, grouting is then carried out, as the areas B and A are blocked by the hole sealing plug 7, grouting in the area C is firstly carried out, the operation rope on the hole sealing plug 7 in the area B is pulled, the hole sealing plug 7 slides down to carry out grouting in the area B due to shearing force, and finally the hole sealing plug 7 in the area A is pulled, so that the different sequence of C, B, A grouting is ensured, broken surrounding rock is reinforced after the slurry is solidified, and the structural integrity of the broken surrounding rock is improved. And the full-length anchoring of the hollow grouting anchor cable is enhanced.
Embodiment four: (second hole sealing method)
D1, assembling a sectional hole sealing device: mixing 0.9-1.3kg/m of static expanding agent with proper amount of water to form flowing slurry, filling the flowing slurry mixed by the two into an external slurry fixing bag 10, tying the rope section between reserved areas between C and B and between B and A to stabilize the rope section, installing a fixing frame 6 to tighten nuts, ensuring tightness of the fixing frame, and completing the installation of the sectional hole sealing device.
D2, sealing out slurry holes: the sealing plug 7 is coated with lubricant, and is blocked on slurry outlet holes of the areas B and A, a thicker plastic glass sleeve 5 is sleeved on the area A, and a thinner sleeve 5 is sleeved on the area B, so that the tightness of the sealing plug is ensured.
D3, punching: drilling a hole 9 for supporting in a roadway, reserving a preset C, B grouting area length at the front section of the cable body, and simultaneously installing a sectional hole sealing device between C and B and between the reserved lengths of B and A so as to fix the sectional hole sealing device on the anchor cable body 1, thereby ensuring the length of a good operation rope.
D4, anchoring: the grouting anchor cable is placed into the drilling hole 9, and the end fixing is carried out by using the hollow sectional grouting anchor cable through mechanical or resin.
D5, grouting: after the static expanding agent reacts, hole sealing is completed in the segmented area, grouting is performed, the B area and the A area are blocked by the hole sealing plug 7, grouting in the C area is performed firstly, the operation rope on the hole sealing plug 7 in the B area is pulled, the hole sealing plug 7 slides down to perform grouting in the B area due to shearing force, and finally the hole sealing plug 7 in the A area is pulled, so that the C, B, A grouting sequence is ensured to be different, broken surrounding rock is reinforced after the slurry is solidified, and the structural integrity of the broken surrounding rock is improved. And the full-length anchoring of the hollow grouting anchor cable is enhanced.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (2)
1. The utility model provides a sectional type cavity slip casting anchor rope, includes anchor rope body, sectional type hole sealing device, the anchor rope body includes cable body (1), tail body nut (2) and backing plate (3), install backing plate (3) on cable body (1), just threaded connection has tail body nut (2) on cable body (1) of one side of backing plate (3); the method is characterized in that: the sectional hole sealing device comprises a hole sealing plug (7) arranged on the cable body (1); a sleeve (5) is sleeved on the outer side of the hole sealing plug (7), and a fixing frame (6) is sleeved on one side of the sleeve (5); a slurry fixing bag is arranged in the fixing frame (6); the cable body (1) comprises a steel strand and a grouting pipe; the sleeve (5) can be a plastic sleeve or a chemical glass sleeve, and has certain strength and brittleness; the slurry fixing bag comprises an outer slurry fixing bag (10), an inner slurry fixing bag (11) is arranged in the outer slurry fixing bag (10), and a nylon fastening tape (12) is arranged between the inner slurry fixing bag (11) and the outer slurry fixing bag (10); an operation rope (8) is connected to the nylon fastening tape (12); the two sectional hole sealing devices divide the cable body (1) into three areas, namely a grouting area A, a grouting area B and a grouting area C, wherein the grouting area A is from the tail end of the cable body (1) to the top end of a fixed frame (6) of a first hole sealing device, the B is from the top end of the fixed frame (6) of the first hole sealing device to the top end of the fixed frame (6) of a second hole sealing device, and the C is from the top end of the fixed frame (6) of the second hole sealing device to the front end of the cable body (1); the cable body (1) is provided with a through grouting hole; a slurry outlet hole is formed in the position, corresponding to the cable body, of the hole sealing device; and the grouting areas B and A are equal in size and number, and the thickness of the sleeve is different between the areas B and A.
2. A method of using the segmented hollow grouting anchor cable of claim 1, wherein: the method comprises the following specific steps: a1, assembling a sectional hole sealing device: the method comprises the steps of opening part of an inner slurry fixing bag (11), arranging a nylon fastening tape (12) at the opening part, connecting the upper end of the nylon fastening tape (12) with an operation rope (8), enabling the operation rope (8) to pull the nylon fastening tape (12) open in future, filling chemical slurry A into the inner slurry fixing bag (11), filling chemical slurry B into an outer slurry fixing bag (10), connecting the inner slurry fixing bag (11) with the outer slurry fixing bag (10) in a rope knot mode, leading the operation rope (8) out of the rope knot mode, enabling free operation of the operation rope not to be affected, and installing a fixing frame on a rope body;
a2, sealing out slurry holes: coating lubricant on the hole sealing plugs (7), blocking the grouting holes of the grouting areas B and A, sleeving the sleeve (5) on the grouting areas B and A, and ensuring the tightness of the grouting areas B and A;
a3, punching: drilling a drilling hole (9) for supporting the roadway;
a4, anchoring: placing the grouting anchor cable into a drilling hole (9), and mechanically fixing the end part by using the sectional hollow grouting anchor cable;
a5, grouting: pulling an operation rope (8) of the sectional hole sealing device to seal holes in areas, grouting a grouting area C, and punching a sleeve (5) of a grouting area B in advance after grouting the grouting area C is completed by slurry, so that the sequence of grouting in a grouting area C, B, A is different, reinforcing broken surrounding rock after the slurry is solidified, and improving the structural integrity of broken surrounding rock.
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| CN201810764089.7A CN108756970B (en) | 2018-07-12 | 2018-07-12 | Sectional hollow grouting anchor cable and use method |
| ZA2021/04769A ZA202104769B (en) | 2018-07-12 | 2021-07-08 | Segmented hollow grouting anchor cable and use method |
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| CN201810764089.7A CN108756970B (en) | 2018-07-12 | 2018-07-12 | Sectional hollow grouting anchor cable and use method |
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| CN108756970B true CN108756970B (en) | 2023-10-13 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109441510A (en) * | 2018-12-28 | 2019-03-08 | 常州工学院 | A kind of impact tunnel segmentation anchoring anchor cable |
| CN109798140B (en) * | 2019-02-21 | 2020-12-18 | 平顶山天安煤业股份有限公司 | Splitting grouting reinforcement support method for kilometer deep well soft rock |
| CN110388223B (en) * | 2019-08-21 | 2020-09-08 | 中国矿业大学 | Sectional grouting hollow grouting anchor cable and use method thereof |
| CN110608062B (en) * | 2019-10-09 | 2021-03-09 | 中国矿业大学 | Multi-section hollow grouting anchor cable and supporting method |
| CN111271105A (en) * | 2020-04-01 | 2020-06-12 | 山东科技大学 | Geotechnical engineering sectional type hollow grouting anchor cable and grouting method |
| CN112392524B (en) * | 2020-11-16 | 2023-02-24 | 山东科技大学 | Geotechnical engineering sectional type cavity slip casting anchor rope device |
| CN112664246B (en) * | 2020-12-19 | 2022-07-08 | 山东新升实业发展有限责任公司 | Rock anchor rod for advance support and construction method |
| CN113217060B (en) * | 2021-06-24 | 2024-05-10 | 中国矿业大学 | Asymmetric control method and device for fixed-length injection of steep coal seam roadway |
| CN114382078B (en) * | 2022-01-24 | 2024-01-30 | 福州大学 | Stress and deformation coordination component among anchor cable bundle steel strands and use method |
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| US6672806B2 (en) * | 2000-11-22 | 2004-01-06 | Forasol International Sa | Device for drilling and anchoring and process for placing grout anchors |
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| KR20070001576A (en) * | 2005-06-29 | 2007-01-04 | 주식회사 아이콘텍이앤씨 | Method of high grouting and that of packer |
| CN102787602A (en) * | 2012-08-31 | 2012-11-21 | 中国水利水电第七工程局成都水电建设工程有限公司 | Curtain grouting technique |
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| CN106223897A (en) * | 2016-08-03 | 2016-12-14 | 河南理工大学 | A kind of fully-mechanized mining working crushes coal petrography deep hole segmenting slip casting method |
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| ZA202104769B (en) | 2021-09-29 |
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