CN113062759A - Solid anchor bolt supporting device capable of grouting and net-shaped anchor bolt supporting structure - Google Patents
Solid anchor bolt supporting device capable of grouting and net-shaped anchor bolt supporting structure Download PDFInfo
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- CN113062759A CN113062759A CN202110566836.8A CN202110566836A CN113062759A CN 113062759 A CN113062759 A CN 113062759A CN 202110566836 A CN202110566836 A CN 202110566836A CN 113062759 A CN113062759 A CN 113062759A
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- anchor rod
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- rod body
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- 239000007787 solid Substances 0.000 title claims abstract description 63
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 92
- 239000010959 steel Substances 0.000 claims abstract description 92
- 238000007789 sealing Methods 0.000 claims abstract description 30
- 238000010276 construction Methods 0.000 claims abstract description 5
- 238000007569 slipcasting Methods 0.000 claims abstract 2
- 239000011440 grout Substances 0.000 claims description 23
- 238000005452 bending Methods 0.000 claims description 3
- 238000012856 packing Methods 0.000 claims 2
- 239000003245 coal Substances 0.000 abstract description 6
- 239000011435 rock Substances 0.000 description 17
- 230000000694 effects Effects 0.000 description 10
- 238000004873 anchoring Methods 0.000 description 8
- 239000000126 substance Substances 0.000 description 5
- 238000005553 drilling Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000005065 mining Methods 0.000 description 3
- 230000002787 reinforcement Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
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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
-
- 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
-
- 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
- E21D21/0026—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts
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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)
Abstract
The invention relates to a solid anchor rod supporting device capable of grouting and a net-shaped anchor rod supporting structure, and belongs to the technical field of coal mine roadway supporting. Including support frame and solid stock and supplementary slip casting hole sealing device, the support frame includes circular supporting bottom plate, and the several in-connection arm is evenly connected in the supporting bottom plate outside, and the in-connection arm other end passes through hinged joint device and is connected with the pressure-bearing backing plate, is equipped with the outer joint arm between per two adjacent pressure-bearing backing plates, and the middle part of every outer joint arm is equipped with the connection buckle, links together every support frame and constitutes netted supporting construction. The anchor rod holes are formed in the middle of the pressure bearing base plate and the middle of the supporting base plate, the steel sleeve is fixed in the anchor rod holes, the solid anchor rod body is fixed in the steel sleeve, three spiral ends are arranged at the front portion of the solid anchor rod body, a plurality of rivets are arranged inside the spiral ends of the rod body, and the tail end of the solid anchor rod body is connected with the auxiliary grouting hole sealing device. The invention can effectively improve the stability and reliability of the support.
Description
Technical Field
The invention relates to a solid anchor rod supporting device capable of grouting and a net-shaped anchor rod supporting structure, and belongs to the technical field of coal mine roadway supporting.
Background
The anchor bolt supporting technology plays an extremely important role in the field of coal mine supporting, has obvious economic and technical benefits, and is widely popularized and applied. In recent years, with the increase of the mining depth of a coal mine, a plurality of mines can meet a soft rock large-deformation roadway, the stress of the roadway is high, the stress disturbance is complex, and most roadways are subjected to one or more mining disturbances. Complicated mining conditions have directly influenced stock anchorage performance and support performance, have produced serious influence to the effect that the country rock was strutted:
1. at present, a single anchor rod is often adopted for fixing on the support of a roadway, the stress of the single anchor rod is limited, when the stress of the anchor rod exceeds the strength of the single anchor rod, the anchor rod is suddenly broken, the anchor cable is prone to failure, and the support stability and reliability are low.
2. The productivity level has higher requirements on anchor and grouting integration, and under a broken geological environment, the roadway support requirements are both anchor rod support and grouting.
In order to solve the problems in the existing coal mine anchor rod anchoring technology, grouting anchor rods are developed in recent years in China, and the existing domestic grouting anchor rods are mainly divided into two types, namely a hollow grouting anchor rod and a combined grouting anchor rod.
The rod body of the existing hollow grouting anchor rod is of a hollow structure, and the rod body of the anchor rod is formed by processing a steel pipe. The hollow grouting anchor rod overcomes the defects of the existing anchor rod to a certain extent, but the hollow anchor rod also has the following problems: 1. the anchor rod has low strength, and the breaking force of the anchor rod is seriously reduced by adopting a hollow rod body. 2. The grouting pressure is low and cannot reach the grouting effect, the grouting pressure cannot be too large due to the extrusion type hole sealing, the hole sealing length and the hole sealing quality are limited to a certain extent, and the anchoring and grouting effects are affected.
3. The hollow grouting anchor rod has higher cost, and the hollow grouting anchor rod is more than 30 percent higher than the common solid anchor rod because the rod body of the hollow grouting anchor rod is processed by adopting a seamless steel pipe or a welded pipe and the process for processing the hollow grouting anchor rod is relatively complex.
The front end of the combined grouting anchor rod body is a solid rod body, the rear end is a hollow rod body, the front end and the rear end are connected by a connecting sleeve, but the existing combined grouting anchor rod is not suitable for surrounding rock support of broken and soft coal mine roadways, and the main problems are as follows: 1. the combined anchor rod adopts a conical grout stop plug, hole sealing and grout stopping are carried out on the hole opening of the anchor rod hole, and when the hole is surrounded by the grout stop plug
When the rock is broken, slurry is easy to leak from the periphery of the drill hole, and the purpose of grouting reinforcement cannot be achieved. 2. The combined grouting anchor rod is additionally provided with the connecting sleeve compared with a hollow grouting anchor rod, a certain gap is formed between the connecting sleeve and the hole wall to ensure the flowing of slurry, the diameter of a drilled hole for construction needs to be relatively large, the drilling construction of a large hole diameter influences the drilling speed, and in addition, the combined grouting anchor rod is complex to process.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a solid anchor rod supporting device capable of grouting and a net-shaped anchor rod supporting structure which have strong adaptability, large supporting area, high supporting stability and good grout stopping effect, are suitable for supporting soft rock, broken zones and high stress area roadways, and are particularly suitable for deep hole supporting of two sides and a bottom plate.
The technical scheme adopted by the invention is as follows: a solid anchor bolt supporting device capable of grouting comprises a supporting frame, a solid anchor bolt 1 and an auxiliary grouting hole sealing device, wherein the supporting frame comprises a circular supporting bottom plate 2, the outer side of the supporting bottom plate 2 is uniformly connected with a plurality of inner connecting arms 7, one end of each inner connecting arm 7 is movably connected with the supporting bottom plate 2 through a hinge connecting device, the other end of each inner connecting arm is movably connected with the middle part of a pressure-bearing base plate 8 through a hinge connecting device, and every two adjacent pressure-bearing base plates 8 are connected through an outer connecting arm 9;
the middle position of a supporting bottom plate 2 and the middle position of a pressure-bearing backing plate 8 are both provided with an anchor rod hole I, a steel sleeve 11 is fixed in the anchor rod hole I, a rod body of a solid anchor rod 1 is fixed in the steel sleeve 11, the inner side of the front part of the rod body of the solid anchor rod 1 is provided with three rod body spiral ends 1-1 at intervals, a plurality of grouting small holes 12 and rivet holes 13 are alternately arranged on the pipe wall of the steel sleeve 11 corresponding to the rod body spiral ends 1-1 at intervals, the rod body spiral ends 1-1 comprise a plurality of fan blades, rivets 14 corresponding to the rivet holes 13 are movably arranged between two adjacent fan blades, after the rod body spiral ends 1-1 rotate for 90 degrees, the rivets 14 are embedded into a rock stratum through the rivet holes 13 on the steel sleeve 11, the tail end of the rod body of the solid anchor rod 1 is connected with an auxiliary grouting hole sealing device, a sealing plug 21, a grouting cup 22 and a conical stop-grouting plug 23, wherein the annular grouting backing plate 18 is fixed above the supporting bottom plate 2 and the pressure-bearing backing plate 8 and is positioned at the periphery of the steel sleeve 11, the arched tray 19 is arranged above the annular grouting backing plate 18 and forms a grouting space between the annular grouting backing plate and the pressure-bearing backing plate, one side of the arched tray 19 is provided with a grouting opening 20, the sealing plug 21 is used for sealing the grouting opening 20, the opening at the tail end of the steel sleeve 11 is sleeved with the grouting cup 22, the bottom of the grouting cup 22 is positioned above the arched tray 19, the middle part of the grouting cup 22 is provided with an anchor rod through hole, the tail end of the grouting cup is provided with the conical plug hole, the conical stop-grouting plug 23 is plugged into the conical plug hole, the upper part of the conical stop-grouting plug 23, a grouting channel 17 is formed between the inner cavity of the steel sleeve 11 and the space between two adjacent fan blades in the spiral end 1-1 of the rod body;
the middle connecting positions of the outer connecting arm 9 and the connecting buckle 10 are respectively provided with an anchor rod hole II, the thin-wall steel tube 25 is fixed in the anchor rod hole II, the auxiliary anchor rod 26 is fixed in the thin-wall steel tube 25, tube seams are cut at intervals on the tube wall of the front end of the thin-wall steel tube 25, the front part of the auxiliary anchor rod 26 is provided with a rod body expansion end 26-1, the end port of the thin-wall steel tube 25 is sleeved with an arched base plate 27, the arched base plate 27 is fixed above the connecting buckle 10, an auxiliary anchor rod through hole is arranged in the middle of the connecting buckle, a hemispherical washer 28 is arranged at the contact position of the auxiliary anchor rod through hole and the thin.
Specifically, the hinge connection device comprises a three-jaw hinge end 3, two-jaw hinge end 4, a bolt 5 and a locking piece 6, the three-jaw hinge end 3 and the two-jaw hinge end 4 are respectively fixed on two devices needing to be movably connected, the bolt 5 penetrates through holes in the middle of the three-jaw hinge end 3 and the two-jaw hinge end 4, and the two ends of the bolt 5 are fixed by the locking piece 6.
Preferably, the lower part of the annular grouting backing plate 18 is provided with a bent part inserted into the drilled hole.
Specifically, the total length of the steel solid anchor rod 1 is 3 meters, the length of each spiral end of the rod body is 1-1 cm, the diameter of each spiral end of the rod body is 10cm, the distance between the spiral ends of the two adjacent rod bodies is 0.7 meter, the total length of the steel sleeve 11 is 2.7 meters, the diameters of the small grouting holes 12 and the rivet holes 13 are both 3.1cm, the rivets 14 are steel tail magnetic rivets, the total length of the rivets 14 is 10cm, and the diameter of each rivet is 3 cm.
Preferably, the supporting bottom plate 2, the inner connecting arm 7, the pressure bearing backing plate 8, the outer connecting arm 9 and the integral connecting arm 29 are all steel plates.
Preferably, the outer diameter of the spiral end 1-1 of the rod body is in clearance fit with the inner diameter of the steel casing 11, the outer diameter of the auxiliary anchor rod 26 and the inner diameter of the thin-wall steel pipe 25, and the fit clearance is 1 mm.
Preferably, the grouting opening 20 is an annular steel pipe with a threaded pipe wall.
Preferably, the material of the sealing plug 21 and the conical grout stop plug 23 is rubber.
A netted anchor bolt supporting structure comprises a plurality of connecting bottom plates 30, a plurality of integral connecting arms 29 and a plurality of solid anchor bolt supporting devices capable of grouting, wherein a connecting buckle 10 is arranged in the middle of each outer connecting arm 9, two anchor rod holes II are formed in each connecting buckle 10, the outer connecting arms 9 of two adjacent solid anchor bolt supporting devices capable of grouting are connected together through the connecting buckles 10, the outer side of each connecting bottom plate 30 is uniformly hinged with the integral connecting arms 29 through hinge connecting devices, and the other end of each integral connecting arm 29 is hinged with a pressure-bearing base plate 8 in one solid anchor bolt supporting device capable of grouting through the hinge connecting devices;
the middle connecting positions of the outer connecting arm 9 and the connecting buckle 10 are respectively provided with an anchor rod hole II, the thin-wall steel tube 25 is fixed in the anchor rod hole II, the auxiliary anchor rod 26 is fixed in the thin-wall steel tube 25, tube seams are cut at intervals on the tube wall of the front end of the thin-wall steel tube 25, the front part of the auxiliary anchor rod 26 is provided with a rod body expansion end 26-1, the end port of the thin-wall steel tube 25 is sleeved with an arched base plate 27, the arched base plate 27 is fixed above the connecting buckle 10, an auxiliary anchor rod through hole is arranged in the middle of the connecting buckle, a hemispherical washer 28 is arranged at the contact position of the auxiliary anchor rod through hole and the thin.
Preferably, the length of the front end pipe seam of the thin-wall steel pipe 25 is the same as that of the rod body expansion end 26-1.
The beneficial technical effects of the invention are as follows:
1. the support frame is reasonable in structural design and convenient to mount, and the support area is increased.
2. The hinge connecting device can be bent along the axial direction of the bolt, so that the hinge connecting device is suitable for the field working environment.
3. Solid anchor rods are fixed in anchor rod holes formed in the middle positions of the supporting base plate 2 and the middle position of the pressure-bearing bottom plate 8, the solid anchor rods are used for anchoring, the breaking force of the solid anchor rods is not lost compared with that of common anchor rods, the strength of the solid anchor rods can be guaranteed, the supporting reliability is enhanced, and the material cost is reduced compared with that of the existing grouting anchor rods.
4. After the spiral end 1-1 of the rod body rotates 90 degrees, the rivet 14 is embedded into a rock stratum, after the rivet 14 is embedded into the rock stratum, chemical grout 15 is injected through the grouting channel 17 in the spiral end 1-1 of the rod body, and the rivet 14 is embedded into the rock stratum to provide prestress for the solid anchor rod, so that the anchoring force of the solid anchor rod is enhanced, and the stability of support is improved.
5. The auxiliary grouting hole sealing device consisting of the annular grouting base plate 18, the arched tray 19, the grouting opening 20, the sealing plug 21, the grouting cup 22 and the conical grout stop plug 23 can prevent grout from leaking outwards, solve the hole sealing problem of grouting, enhance the fixing effect of the solid anchor rod, realize anchoring and grouting integration and improve the roadway support efficiency; the invention organically combines anchor bolt support and grouting reinforcement, and effectively solves the support problem of the rock mass roadway in the complex environment.
6. The front part of the auxiliary anchor rod 26 is provided with a rod body expansion end 26-1, when the auxiliary anchor rod is rotated to enable the rod body expansion end 26-1 at the front part to completely enter the thin-wall steel tube 25, according to the expansion screw principle, the front end of the thin-wall steel tube 25 is expanded and embedded into a rock stratum, prestress is provided for the auxiliary anchor rod, and the anchoring force of the auxiliary anchor rod is enhanced.
7. The middle position of each external connecting arm 9 is provided with a connecting buckle 10, each supporting frame forms a net-shaped anchor rod supporting structure through the connecting buckle 10 and the hinge connecting device, the supporting area is increased, the whole supporting net-shaped supporting structure cannot be influenced if a certain supporting frame is loosened and slides, and the supporting reliability and safety are improved.
Drawings
FIG. 1 is a schematic structural view of the present invention;
figure 2 is a schematic view of a groutable solid bolting device body;
fig. 3 is a general schematic view of a mesh bolting configuration;
fig. 4 is a partial schematic view of a mesh bolting configuration;
fig. 5 is a schematic view of an auxiliary bolt body;
FIG. 6 is a schematic view of the assembly of the screw end of the shank and the steel sleeve and rivet;
FIG. 7 is a schematic illustration of the assembly of the practical application of FIG. 2 with the rivet inserted into the formation;
FIG. 8 is a sectional view of a thin-walled steel pipe subjected to expansion deformation in practical use;
FIG. 9 is a left side view of a thin-walled steel pipe undergoing expansion deformation in practical use;
FIG. 10 is a three-dimensional view of an arcuate shim plate according to the present invention;
fig. 11 is a three-dimensional view of the annular grouting pad of the present invention.
In the drawings, the individual reference numerals are: 1-solid anchor rod, 1-1-rod spiral end, 2-support bottom plate, 3-hinge three-jaw end, 4-hinge two-jaw end, 5-bolt, 6-locking piece, 7-inner connecting arm, 8-bearing backing plate, 9-outer connecting arm, 10-connecting buckle, 11-steel casing, 12-grouting small hole, 13-rivet hole, 14-rivet, 15-chemical grout, 16-grouting hole, 17-grouting channel, 18-annular grouting backing plate, 19-arched tray, 20-grouting port, 21-riveting cup, 22-grouting cup, 23-conical grout stopper, 24-nut, 25-thin-walled steel tube, 26-auxiliary anchor rod, 26-1-rod expansion end, 27-arched backing plate, 28-hemispherical washer, 29-integral connecting arm, 30-connecting bottom plate.
Detailed Description
For the purpose of enhancing an understanding of the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and examples.
Example 1: as shown in fig. 1-11, a solid anchor bolt supporting device capable of grouting comprises a supporting frame, a solid anchor bolt 1 and an auxiliary grouting hole sealing device, wherein the supporting frame comprises a circular supporting bottom plate 2, the outer side of the supporting bottom plate 2 is uniformly connected with a plurality of inner connecting arms 7, one end of each inner connecting arm 7 is movably connected with the supporting bottom plate 2 through a hinge connecting device, the other end of each inner connecting arm is movably connected with the middle part of a pressure-bearing base plate 8 through a hinge connecting device, and every two adjacent pressure-bearing base plates 8 are connected through an outer connecting arm 9;
the middle position of a supporting bottom plate 2 and the middle position of a pressure-bearing backing plate 8 are both provided with an anchor rod hole I, a steel sleeve 11 is fixed in the anchor rod hole I, a rod body of a solid anchor rod 1 is fixed in the steel sleeve 11, the inner side of the front part of the rod body of the solid anchor rod 1 is provided with three rod body spiral ends 1-1 at intervals, a plurality of grouting small holes 12 and rivet holes 13 are alternately arranged on the pipe wall of the steel sleeve 11 corresponding to the rod body spiral ends 1-1 at intervals, the rod body spiral ends 1-1 comprise a plurality of fan blades, rivets 14 corresponding to the rivet holes 13 are movably arranged between two adjacent fan blades, after the rod body spiral ends 1-1 rotate for 90 degrees, the rivets 14 are embedded into rock strata through the rivet holes on the steel sleeve 11, the tail end of the rod body of the solid anchor rod 1 is connected with an auxiliary grouting hole sealing device, and the auxiliary grouting, A grouting cup 22 and a conical grout stop plug 23, wherein an annular grouting backing plate 18 is fixed above a supporting base plate 2 and a pressure bearing backing plate 8 and is positioned at the periphery of a steel sleeve 11, an arched tray 19 is arranged above the annular grouting backing plate 18 and forms a grouting space between the annular grouting backing plate and the pressure bearing backing plate, one side of the arched tray 19 is provided with a grouting opening 20, a sealing plug 21 is used for sealing the grouting opening 20, the opening at the tail end of the steel sleeve 11 is sleeved with the grouting cup 22, the bottom of the grouting cup 22 is positioned above the arched tray 19, the middle part of the grouting cup 22 is provided with an anchor rod through hole, the tail end of the grouting cup is provided with a conical plug hole, the conical grout stop plug 23 is plugged into the conical plug hole, the upper part of the conical grout stop plug 23 is provided with a nut 24 arranged on a solid anchor rod 1, the wall at the tail end of the steel sleeve 11 is provided with a grouting, chemical grout 15 is grouted through a grouting channel 17;
the middle connecting positions of the outer connecting arm 9 and the connecting buckle 10 are respectively provided with an anchor rod hole II, the thin-wall steel tube 25 is fixed in the anchor rod hole II, the auxiliary anchor rod 26 is fixed in the thin-wall steel tube 25, tube seams are cut at intervals on the tube wall of the front end of the thin-wall steel tube 25, the front part of the auxiliary anchor rod 26 is provided with a rod body expansion end 26-1, the end port of the thin-wall steel tube 25 is sleeved with an arched base plate 27, the arched base plate 27 is fixed above the connecting buckle 10, an auxiliary anchor rod through hole is arranged in the middle of the connecting buckle, a hemispherical washer 28 is arranged at the contact position of the auxiliary anchor rod through hole and the thin.
Further, the hinge connection device comprises a hinge three-claw end 3, a hinge two-claw end 4, a bolt 5 and a locking piece 6, the hinge three-claw end 3 and the hinge two-claw end 4 are respectively fixed on the two devices which need to be movably connected, the bolt 5 penetrates through holes in the middle of the hinge three-claw end 3 and the hinge two-claw end 4, and the two ends of the bolt 5 are fixed by the locking piece 6.
Furthermore, the lower part of the annular grouting base plate 18 is provided with a bending part inserted into the drill hole, and the arrangement of the bending part can well play a role in leakage prevention.
Further, the total length of the steel solid anchor rod 1 is 3 meters, the length of each spiral end of the rod body is 1-1 cm, the diameter of each spiral end of the rod body is 10cm, the distance between the spiral ends of the two adjacent rod bodies is 0.7 meter, the total length of the steel sleeve 11 is 2.7 meters, the diameters of the small grouting holes 12 and the rivet holes 13 are both 3.1cm, the rivets 14 are steel tail magnetic rivets, the total length of the rivets 14 is 10cm, and the diameter of each rivet is 3 cm.
Furthermore, the supporting bottom plate 2, the inner connecting arm 7, the pressure bearing base plate 8 and the outer connecting arm 9 are all steel plates, and are firm and durable.
Furthermore, the outer diameter of the spiral end 1-1 of the rod body is in clearance fit with the inner diameter of the steel sleeve 11, the outer diameter of the auxiliary anchor rod 26 and the inner diameter of the thin-wall steel pipe 25, and the fit clearance is 1 mm.
Further, the grouting opening 20 is an annular steel pipe with a threaded pipe wall.
Furthermore, the materials of the sealing plug 21 and the conical grout stop plug 23 are rubber, so that the sealing effect is good.
A netted anchor bolt supporting structure comprises a plurality of connecting bottom plates 30, a plurality of integral connecting arms 29 and a plurality of solid anchor bolt supporting devices capable of grouting, wherein a connecting buckle 10 is arranged in the middle of each outer connecting arm 9, two anchor rod holes II are formed in each connecting buckle 10, the outer connecting arms 9 of two adjacent solid anchor bolt supporting devices capable of grouting are connected together through the connecting buckles 10, the outer side of each connecting bottom plate 30 is uniformly hinged with the integral connecting arms 29 through hinge connecting devices, and the other end of each integral connecting arm 29 is hinged with a pressure-bearing base plate 8 in one solid anchor bolt supporting device capable of grouting through the hinge connecting devices;
the middle connecting positions of the outer connecting arm 9 and the connecting buckle 10 are respectively provided with an anchor rod hole II, the thin-wall steel tube 25 is fixed in the anchor rod hole II, the auxiliary anchor rod 26 is fixed in the thin-wall steel tube 25, tube seams are cut at intervals on the tube wall of the front end of the thin-wall steel tube 25, the front part of the auxiliary anchor rod 26 is provided with a rod body expansion end 26-1, the end port of the thin-wall steel tube 25 is sleeved with an arched base plate 27, the arched base plate 27 is fixed above the connecting buckle 10, an auxiliary anchor rod through hole is arranged in the middle of the connecting buckle, a hemispherical washer 28 is arranged at the contact position of the auxiliary anchor rod through hole and the thin.
Further, the length of the front end pipe seam of the thin-wall steel pipe 25 is the same as that of the rod body expansion end 26-1.
As shown in fig. 3, 4 and 5, a connecting buckle 10 is placed on each external connecting arm 9, then, the thin-wall steel pipe 25 is firstly pushed to the bottom of the hole after penetrating through the anchor rod hole II at the middle position of the connecting buckle 10 and the outer connecting arm 9, then the auxiliary anchor rod 26 is pushed to the bottom of the thin-wall steel pipe 25 after penetrating through the anchor rod hole II at the middle position of the connecting buckle 10 and the outer connecting arm 9, the auxiliary anchor rod 26 is rotated to enable the rod body expansion end 26-1 to enter the thin-wall steel pipe 25, according to the expansion screw principle, the front end of the thin-wall steel pipe 25 is expanded and embedded into a rock stratum to provide prestress for the auxiliary anchor rod, finally, an arched base plate 27 and a hemispherical washer 28 are sequentially installed at the tail end of the auxiliary anchor rod 26 and fixed through a nut 24, a hinge connecting device is arranged at the end part of each supporting frame, the supporting frames are connected with an integral connecting arm 29 through a hinge, and the integral connecting arm 29 is connected with a connecting bottom plate 30 through a hinge. Through the steps, each support frame forms a net-shaped anchor rod support structure through the connecting buckle 10 and the hinge connecting device.
The invention relates to a reticular anchor rod supporting structure and a mounting process of a solid anchor rod supporting device capable of grouting, which comprises the following specific steps:
(1) drilling and installing a support frame and a solid anchor rod support device.
And (5) completing the drilling by referring to the construction of FIG. 3. Referring to fig. 1 and 2, the support frame is an integral structure connected through a hinge, and comprises a support base plate 2, an inner connecting arm 7, a pressure-bearing backing plate 8 and an outer connecting arm 9, wherein firstly, an anchor rod hole I in the middle of the support base plate 2 is aligned with a drilled hole and fixed with the support frame, then, a steel sleeve 11 penetrates through the anchor rod hole I in the middle of the support base plate 2 and is pushed to the bottom of the hole, then, a solid anchor rod 1 penetrates through the anchor rod hole I in the middle of the support base plate 2 and is pushed to the bottom of the steel sleeve 11, and finally, the solid anchor rod 1 is rotated by 90 degrees, so that a rivet 14 in a rod body spiral end 1-1 is embedded into a rock stratum, prestress is provided for the solid anchor rod, the anchor rod has an anchoring effect, and the specific effect is shown in.
(2) And installing an auxiliary grouting hole sealing device and connecting each support frame.
Referring to fig. 2, the annular grouting backing plate 18, the arched tray 19 and the grouting cup 22 are connected together to form an integral structure, the integral structure formed by the annular grouting backing plate 18, the arched tray 19 and the grouting cup 22 is firstly placed on the pressure-bearing bottom plate 8, the pressure-bearing bottom plate 8 is connected with the integral structure formed by the annular grouting backing plate 18, the arched tray 19 and the grouting cup 22 by using a colloid connecting agent, then the conical grout stop plug 23 is installed at the tail end of the solid anchor rod 1, the conical grout stop plug 23 is plugged into the conical plug hole of the grouting cup 22, and finally the auxiliary grouting hole sealing device is fixed by using the nut 24.
Referring to fig. 1 and 5, the connecting buckle 10 is placed on each external connecting arm 9, then the thin-wall steel tube 25 penetrates through the anchor rod hole ii in the middle of the connecting buckle 10 and the external connecting arm 9 and is pushed to the bottom of the hole, the auxiliary anchor rod 26 penetrates through the anchor rod hole ii in the middle of the connecting buckle 10 and the external connecting arm 9 and is pushed to the bottom of the thin-wall steel tube 25, the auxiliary anchor rod 26 is rotated to enable the rod body expansion end 26-1 to enter the thin-wall steel tube 25, according to the expansion screw principle, the front end of the thin-wall steel tube 25 is expanded and embedded into a rock stratum to provide prestress for the auxiliary anchor rod, and finally the arched base plate 27 and the hemispherical washer 28 are sequentially installed at the tail end of the auxiliary anchor rod 26 and are fixed. Each end of the support frame is provided with a hinge connecting device, the integral connecting arm 29 is connected with the support frame through a hinge, and the integral connecting arm 29 is connected with the connecting bottom plate 30 through a hinge.
Referring to fig. 4, after each support frame is connected with the hinge connection device through the connection buckle 10, the steel casing 11 penetrates through the anchor rod hole iii in the middle of the connection base plate 30 and is pushed to the bottom of the hole, the solid anchor rod 1 penetrates through the anchor rod hole i in the middle of the support base plate 2 and is pushed to the bottom of the steel casing 11, and finally the solid anchor rod 1 is rotated by 90 degrees, so that the rivet 14 in the spiral end 1-1 of the rod body is embedded into the rock stratum. Through the steps, each support frame forms a net-shaped anchor rod supporting structure through the connecting buckle 10 and the hinge connecting device, and the specific effect is shown in fig. 3.
(3) Grouting and sealing the hole.
Referring to fig. 2 and 6, an external grouting apparatus is connected to the grouting port 20 to perform grouting. Chemical grout 15 is injected from a grouting port 20 through a grouting hole 16 in the steel casing 11, and the chemical grout 15 flows along a grouting channel 17 and a grouting small hole 12 in the steel casing 11 until the bottom and peripheral cracks are filled. After the grouting is completed, the external grouting equipment is removed, and the rotary sealing block 21 seals the grouting port 20.
The invention has reasonable design and convenient installation, the supporting area of the net-shaped anchor rod supporting structure is increased, the stability and the reliability of the support are improved, and the hinge device used for connection can be bent at will to adapt to the field working environment; the assembly design of the spiral end and the rivet of the rod body, the expansion end of the rod body and the thin-wall steel pipe provides prestress for the anchor rod, enhances the anchoring force of the anchor rod and improves the supporting strength; grouting is carried out through an annular grouting space between the solid anchor rod and the steel sleeve, anchor rod support and grouting reinforcement are organically combined, and the problem of support of a rock roadway in a complex environment is effectively solved.
While the present invention has been described in detail with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, and various changes can be made without departing from the spirit and scope of the present invention.
Claims (10)
1. The utility model provides a solid bolting device that can slip casting which characterized in that: the supporting frame comprises a circular supporting base plate (2), a plurality of inner connecting arms (7) are uniformly connected to the outer side of the supporting base plate (2), one end of each inner connecting arm (7) is movably connected with the supporting base plate (2) through a hinge connecting device, the other end of each inner connecting arm is movably connected with the middle of a pressure-bearing base plate (8) through a hinge connecting device, and every two adjacent pressure-bearing base plates (8) are connected through an outer connecting arm (9);
the middle position of the supporting bottom plate (2) and the middle position of the pressure-bearing backing plate (8) are respectively provided with an anchor rod hole I, the steel sleeve (11) is fixed in the anchor rod hole I, the rod body of the solid anchor rod (1) is fixed in the steel sleeve (11), three rod body spiral ends (1-1) are arranged on the inner side of the front part of the rod body of the solid anchor rod (1) at intervals, a plurality of grouting small holes (12) and rivet holes (13) are alternately arranged on the pipe wall, corresponding to the rod body spiral ends (1-1), of the steel sleeve (11) at intervals, the rod body spiral ends (1-1) comprise a plurality of fan blades, rivets (14) corresponding to the rivet holes (13) are movably placed between every two adjacent fan blades, the tail end of the rod body of the solid anchor rod (1) is connected with an auxiliary grouting hole sealing device, the auxiliary grouting hole sealing device comprises an annular grouting backing plate (18, The grouting device comprises a grouting cup (22) and a conical grout stop plug (23), wherein an annular grouting base plate (18) is fixed above a supporting base plate (2) and a pressure-bearing base plate (8) and is positioned at the periphery of a steel sleeve (11), an arch-shaped tray (19) is installed above the annular grouting base plate (18) and forms a grouting space between the annular grouting base plate and the pressure-bearing base plate, one side of the arch-shaped tray (19) is provided with a grouting opening (20), a sealing plug (21) is used for sealing the grouting opening (20), the opening at the tail end of the steel sleeve (11) is sleeved with the grouting cup (22), the bottom of the grouting cup (22) is positioned above the arch-shaped tray (19), the middle of the grouting cup (22) is provided with a bolt through hole, the tail end of the grouting cup is provided with a conical plug hole, the conical grout stop plug (23) is plugged into the conical plug hole, the upper part of the conical grout stop plug (23) is provided with a nut (, and a grouting channel (17) is formed by the grouting hole (16), the inner cavity of the steel sleeve (11) and a gap between two adjacent fan blades in the spiral end (1-1) of the rod body.
2. A groutable solid bolting device according to claim 1, characterised in that: the hinge connection device comprises a hinge three-claw end (3), a hinge two-claw end (4), a bolt (5) and a locking piece (6), the hinge three-claw end (3) and the hinge two-claw end (4) are connected and fixed on the two devices needing to be movably connected respectively, the bolt (5) penetrates through holes in the middle of the hinge three-claw end (3) and the hinge two-claw end (4), and the two ends of the bolt (5) are fixed by the locking piece (6).
3. A groutable solid bolting device according to claim 1, characterised in that: the lower part of the annular grouting backing plate (18) is provided with a bending part inserted into the drill hole.
4. A groutable solid bolting device according to claim 1, characterised in that: the full length of the steel solid anchor rod (1) is 3 meters, the length of each rod body spiral end (1-1) is 30cm, the diameter of each rod body spiral end is 10cm, the distance between every two adjacent rod body spiral ends (1-1) is 0.7 meter, the full length of the steel sleeve (11) is 2.7 meters, the diameters of a grouting small hole and a rivet hole are 3.1cm, the rivet (14) is a steel tail magnetic rivet, the full length of the rivet (14) is 10cm, and the diameter of the rivet is 3 cm.
5. A groutable solid bolting device according to claim 1, characterised in that: the supporting bottom plate (2), the inner connecting arm (7), the pressure bearing base plate (8), the outer connecting arm (9) and the integral connecting arm (29) are all steel plates.
6. A groutable solid bolting device according to claim 1, characterised in that: the outer diameter of the spiral end (1-1) of the rod body is in clearance fit with the inner diameter of the steel sleeve (11), the outer diameter of the auxiliary anchor rod (26) is in clearance fit with the inner diameter of the thin-wall steel pipe (25), and the fit clearance is 1 mm.
7. A groutable solid bolting device according to claim 1, characterised in that: the grouting opening (20) is a steel annular pipe with a threaded pipe wall.
8. A groutable solid bolting device according to claim 1, characterised in that: the sealing plug (21) and the conical grout stop plug (23) are made of rubber.
9. A netted stock supporting construction which characterized in that: comprises a plurality of connecting bottom plates (30), a plurality of integral connecting arms (29) and a plurality of groutable solid bolting devices according to any of claims 1-8, wherein a connecting buckle (10) is arranged at the middle position of each external connecting arm (9), each connecting buckle (10) is provided with two anchor rod holes II, the external connecting arms (9) of two adjacent groutable solid bolting devices are connected together through the connecting buckles (10), an anchor rod hole III is arranged at the middle position of each connecting bottom plate (30), the connecting mode of the anchor rod hole III is completely the same as that of the anchor rod hole I, the outer side of each connecting bottom plate (30) is uniformly hinged with a plurality of integral connecting arms (29) through hinge connecting devices, and the other end of each integral connecting arm (29) is hinged with a pressure bearing backing plate (8) in one groutable solid bolting device through a hinge connecting device;
outer joint arm (9) and the intermediate junction position of connecting buckle (10) all are equipped with anchor rod hole II, thin wall steel pipe (25) are fixed in anchor rod hole II, supplementary stock (26) are fixed in thin wall steel pipe (25), the interval has cut the tube seam on the pipe wall of thin wall steel pipe (25) front end, supplementary stock (26) front portion is equipped with body of rod inflation end (26-1), the end port department cover of thin wall steel pipe (25) has arch backing plate (27), arch backing plate (27) are fixed and are equipped with supplementary stock through-hole in the middle of connecting buckle (10) top, supplementary stock through-hole and thin wall steel pipe (25) contact department pad have hemisphere packing ring (28), the top of hemisphere packing ring (28) is equipped with nut (24) of installing on supplementary stock (26).
10. A mesh bolting configuration according to claim 9, characterised in that: the length of the front end pipe seam of the thin-wall steel pipe (25) is the same as that of the rod body expansion end (26-1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110566836.8A CN113062759A (en) | 2021-05-24 | 2021-05-24 | Solid anchor bolt supporting device capable of grouting and net-shaped anchor bolt supporting structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110566836.8A CN113062759A (en) | 2021-05-24 | 2021-05-24 | Solid anchor bolt supporting device capable of grouting and net-shaped anchor bolt supporting structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113062759A true CN113062759A (en) | 2021-07-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110566836.8A Withdrawn CN113062759A (en) | 2021-05-24 | 2021-05-24 | Solid anchor bolt supporting device capable of grouting and net-shaped anchor bolt supporting structure |
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| Country | Link |
|---|---|
| CN (1) | CN113062759A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114086552A (en) * | 2021-11-05 | 2022-02-25 | 常州工学院 | Anchor bolt supporting device suitable for sandy soil field |
-
2021
- 2021-05-24 CN CN202110566836.8A patent/CN113062759A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114086552A (en) * | 2021-11-05 | 2022-02-25 | 常州工学院 | Anchor bolt supporting device suitable for sandy soil field |
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