CN113107564A - Anchor rod structure for fixing water-rich karst tunnel surrounding rock and using method thereof - Google Patents
Anchor rod structure for fixing water-rich karst tunnel surrounding rock and using method thereof Download PDFInfo
- Publication number
- CN113107564A CN113107564A CN202110548146.XA CN202110548146A CN113107564A CN 113107564 A CN113107564 A CN 113107564A CN 202110548146 A CN202110548146 A CN 202110548146A CN 113107564 A CN113107564 A CN 113107564A
- Authority
- CN
- China
- Prior art keywords
- surrounding rock
- anchoring
- anchor rod
- anchor
- shell
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/003—Machines for drilling anchor holes and setting anchor bolts
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/02—Setting anchoring-bolts with provisions for grouting
- E21D20/021—Grouting with inorganic components, e.g. cement
Abstract
The invention provides an anchor rod structure for fixing water-rich karst tunnel surrounding rocks and a using method thereof, wherein the contact area between an anchor head and the surrounding rocks is increased through a shell-expanding type anchoring head; the friction resistance between anchor rod and surrounding rock has been increased, the anchoring effect of anchor rod has been strengthened, through setting up prestressing force to the anchor rod, and transmit for the surrounding rock through the anchor head, exert the initiative pressure on the surrounding rock surface, make it be in triaxial stress distribution and reach the stable state, the bearing strength of surrounding rock self has been strengthened, the thick liquid is full to be filled inside the anchor rod, the body of rod nature between two parties is good, the mortar can wrap up whole body of rod, not only corrosion resistance is good can also make the distribution of stress more even.
Description
Technical Field
The invention relates to the field of karst cave geological tunnel engineering construction, in particular to an anchor rod structure for fixing water-rich karst tunnel surrounding rocks and a using method thereof.
Background
The step method is widely applied to tunnel engineering construction as a construction method, and is a common construction method for second-level, third-level, IV-level and partial V-level surrounding rock deep buried sections of tunnels. In recent years, the development demand of underground space is rapidly increased, however, the distribution of underground rivers is complicated and is very wide, the phenomena of collapse and water inrush and mud inrush caused by the action of water inrush and karst of underground rivers are more and more common in the construction of underground engineering, the damage is brought to the supporting structure and the construction equipment of a tunnel, the economic loss and the immeasurable damage brought to the ecological environment by casualties are more likely to be caused, and the traditional supporting process not only consumes a large amount of cost, but also has little effect on the aspect of reinforcing surrounding rocks.
In the process of constructing water-rich karst geology, the existing anchor rod construction technology causes serious problems of surface subsidence, collapse and the like because surrounding rock conditions are poor, and instability damage occurs to overlying strata and soil layers of underground water-containing structures in the excavation process, even water inrush and water gushing occur, so that effective stress in the strata and soil layers which are not balanced suddenly changes.
Disclosure of Invention
Aiming at the problem that the tunnel surrounding rock cannot be fixed during the construction of the water-rich karst geology in the prior art, the invention provides the anchor rod structure for fixing the water-rich karst tunnel surrounding rock and the using method thereof, so that the water-rich karst tunnel surrounding rock can be effectively fixed, the risk of surface subsidence and collapse is reduced, and the safety performance of tunnel operation is greatly improved.
The invention is realized by the following technical scheme:
an anchor rod structure for fixing surrounding rocks of a water-rich karst tunnel comprises a protection pipe inserted into a drill hole and an anchoring assembly inserted into the protection pipe; the protection tube is arranged in a run-through manner, and the anchoring assembly comprises an expansion shell type anchoring head, an anchor rod and a sealing assembly; one end of the anchor rod is provided with an expansion shell type anchoring head; wherein the expansion shell type anchoring head is contacted with the surrounding rock at the inner side of the drill hole through a protection pipe; the other end of the anchor rod is provided with a sealing assembly for sealing the drill hole and the protection pipe; the sealing assembly is inserted with a grouting guide pipe, cement mortar is injected into the protective pipe through the grouting guide pipe, and the protective pipe protects the anchoring assembly and enhances the fixing strength of the surrounding rock drilling.
Preferably, the expansion-shell type anchoring head comprises an anchoring head sliding part, an upward expansion shell anchoring part and a downward expansion shell anchoring part; one end of the upper expansion shell anchoring part is connected with one end of the lower expansion shell anchoring part through a connecting rod; the anchor head sliding piece is provided with a sliding groove, the rising shell anchoring piece and the rising shell anchoring piece are driven to move along the anchor head sliding piece while moving in the sliding groove through the connecting rod, and the anchor rod is pushed against the connecting rod through the anchor head sliding piece and is used for pushing the connecting rod and driving the rising shell anchoring piece and the rising shell anchoring piece to move along the anchor head sliding piece.
Furthermore, a plurality of shell expansion locking plates are respectively arranged on one sides of the upper expansion shell anchoring part and the lower expansion shell anchoring part, which are in contact with the side wall of the surrounding rock, and are used for increasing the friction force between the upper expansion shell anchoring part and the lower expansion shell anchoring part and the side wall of the surrounding rock at the inner side of the drill hole.
Preferably, the sealing assembly comprises a gasket, a nut and a grout stop plug; the grout stopping plug and the gasket are sequentially sleeved into the tail end of the anchor rod, the grout stopping plug is tightly arranged in an outer port of the protection tube, the gasket cover is arranged on an outer port of the protection tube, the nut is in threaded connection with the tail end of the anchor rod, and the top of the grout stopping plug is tightly arranged on the gasket.
Further, a backing plate is fixedly arranged on the extension of the gasket.
Furthermore, the anchor rod is provided with a stress meter which is arranged around the nut.
Further, still include the blast pipe, the blast pipe passes through the packing ring and stops that thick liquid stopper inserts to the protection tube in the setting.
Preferably, the pipe orifice of the grouting guide pipe extends into one end of the inner side of the protection pipe along the pipe body of the protection pipe, and cement mortar is filled from one end of the inner side of the protection pipe to one end of the outer side of the protection pipe.
Preferably, the protection tube is provided with a plurality of mortar output holes along the tube body.
The use method of the anchor rod structure for fixing the water-rich karst tunnel surrounding rock is based on the anchor rod structure and is characterized by comprising the following steps of:
arranging holes at the surrounding rock of the fixed water-rich karst tunnel, drilling, checking the holes, cleaning the holes and leveling the hole openings; inserting the protection tube into the drill hole, inserting the anchoring assembly into the protection tube, and enabling the shell expanding type anchoring head of the anchoring assembly to be in contact with the inner side surrounding rock of the drill hole, so that the friction force between the shell expanding type anchoring head and the side wall of the inner side surrounding rock of the drill hole is increased; the sealing assembly seals the drill hole and the protection pipe; and grouting the inside of the drill hole through the sealing assembly until the drill hole is filled with the slurry, and finishing the work.
Compared with the prior art, the invention has the following beneficial technical effects:
the invention provides an anchor rod structure for fixing water-rich karst tunnel surrounding rocks, wherein the contact area between an anchor head and the surrounding rocks is increased through a shell-expanding type anchor head; the friction resistance between anchor rod and surrounding rock has been increased, the anchoring effect of anchor rod has been strengthened, through setting up prestressing force to the anchor rod, and transmit for the surrounding rock through the anchor head, exert the initiative pressure on the surrounding rock surface, make it be in triaxial stress distribution and reach the stable state, the bearing strength of surrounding rock self has been strengthened, the thick liquid is full to be filled inside the anchor rod, the body of rod nature between two parties is good, the mortar can wrap up whole body of rod, not only corrosion resistance is good can also make the distribution of stress more even.
Further, the expansion shell type anchoring head comprises an anchoring head sliding part, an upward expansion shell anchoring part and a downward expansion shell anchoring part; one end of the upper expansion shell anchoring part is connected with one end of the lower expansion shell anchoring part through a connecting rod; the anchor head sliding piece is provided with a sliding groove, the rising shell anchoring piece and the rising shell anchoring piece are driven to move along the anchor head sliding piece through the connecting rod when the rising shell anchoring piece and the rising shell anchoring piece move in the sliding groove, the anchor rod is pushed on the connecting rod through the anchor head sliding piece, and the anchor rod is pushed on the connecting rod through pushing of the anchor rod, so that the rising shell anchoring piece and the rising shell anchoring piece are propped, the contact area of the rising shell anchoring piece and the rising shell anchoring piece with the inner side surrounding rock of a drilled hole is increased, the friction resistance between the anchor rod and the surrounding rock is increased, and the anchoring effect of the anchor rod.
Furthermore, a plurality of shell expansion locking plates are respectively arranged on one sides of the rising shell anchoring piece and the rising shell anchoring piece, which are contacted with the side wall of the surrounding rock, so that the contact area between the anchor head and the surrounding rock is increased; the friction resistance between the anchor rod and the surrounding rock is increased, and the anchoring effect of the anchor rod is enhanced.
Further, the sealing assembly comprises a gasket, a nut and a grout stop plug; the grout stopping plug and the gasket are sequentially sleeved into the tail end of the anchor rod, the grout stopping plug is tightly arranged in an outer port of the protection tube, the gasket cover is arranged on an outer port of the protection tube, the nut is in threaded connection with the tail end of the anchor rod, the top of the grout stopping plug is tightly arranged on the gasket, the sealing assembly strengthens the sealing performance of the protection tube and the drill hole, and grouting overflow is avoided.
Furthermore, a backing plate is fixedly arranged on the extension of the gasket and used for increasing the stress strength of the tail of the anchor rod.
Furthermore, the anchor rod is provided with a stress meter which is arranged around the nut, so that the nut is effectively subjected to prestress measurement.
Furthermore, the exhaust pipe is inserted into the protective pipe through a gasket and a grout stop plug and is used for discharging air in the protective pipe.
Further, the mouth of pipe of slip casting pipe stretches into the inboard one end setting of protection tube along the body of protection tube, by the inboard one end of protection tube to the filling cement mortar of protection tube outside one end, can effectually detect the filling condition of the cement mortar in the protection tube through the slip casting of slip casting pipe.
Further, be equipped with a plurality of mortar delivery outlet along the body on the protection tube, be convenient for carry out effectual packing in to drilling.
The utility model provides a use method for fixing anchor rod structure of rich water karst tunnel country rock, can effectively block the infiltration of groundwater to the stock body of rod through the protection tube that goes into the drilling and the anchor subassembly that inserts in the protection tube, avoided because the erosion of groundwater makes the body of rod self take place chemical reaction and reduce intensity, fine reduction karst effect and groundwater erosion to country rock and anchor rod structure's destruction.
Drawings
FIG. 1 is a schematic view of a construction structure of the anchor rod structure inserted into a surrounding rock hole in the invention;
FIG. 2 is a schematic structural view of the closed state of the expanding-shell type anchoring head of the present invention;
FIG. 3 is a schematic structural view of the expanding-shell type anchor head of the present invention in an expanded state;
fig. 4 is a schematic structural view of a hollow anchor rod of the protection tube of the present invention;
FIG. 5 is a schematic view of a seal structure of the anchor rod structure of the present invention;
FIG. 6 is a front view of a seal structure of the anchor rod structure of the present invention;
fig. 7 is a construction flow chart of the anchor rod structure inserted into the surrounding rock hole in the invention.
In the figure: 1-expanding shell type anchoring head; 2-protecting the tube; 3-anchor rod; 4-a mortar output hole; 5-a gasket; 6-a nut; 7-a backing plate; 8-an exhaust pipe; 9-stop plug; 10-a strain gauge; 11-a grouting guide pipe; 12-an anchoring head slider; 13-rising shell anchors; 14-a down-shell anchor; 15-a connecting rod; 16-shell-expanding locking plate.
Detailed Description
The present invention will now be described in further detail with reference to specific examples, which are intended to be illustrative, but not limiting, of the invention.
The invention provides an anchor rod structure for fixing water-rich karst tunnel surrounding rocks, which comprises a protection pipe 2 inserted into a drill hole and an anchoring assembly inserted into the protection pipe 2, wherein the protection pipe 2 is provided with a plurality of anchor holes; the protection tube 2 is arranged in a penetrating manner, and the anchoring assembly comprises an expansion shell type anchoring head 1, an anchor rod 3 and a sealing assembly; one end of the anchor rod 3 is provided with an expansion shell type anchoring head 1; wherein the expanding shell type anchoring head 1 is contacted with the surrounding rock at the inner side of the drill hole through the protection tube 2; the other end of the anchor rod 3 is provided with a sealing assembly for sealing the drilling hole and protecting the tube 2; the sealing assembly is inserted with the grouting guide pipe 11, cement mortar is injected into the protection pipe 2 through the grouting guide pipe 11, the protection of the protection pipe 2 on the anchoring assembly and the enhancement of the fixing strength of surrounding rock drilling are achieved, and the anchor rod is arranged in a hollow structure.
According to fig. 2 and 3, the expanding-shell type anchor head 1 comprises an anchor head slider 12, an expanding-shell anchor 13 and a expanding-shell anchor 14; one ends of the rising shell anchoring piece 13 and the rising shell anchoring piece 14 are connected through a connecting rod 15; the anchor head sliding piece 12 is provided with a sliding groove, the rising shell anchoring piece 13 and the rising shell anchoring piece 14 are driven to move along the anchor head sliding piece 12 by the rising shell anchoring piece 13 and the rising shell anchoring piece 14 when moving in the sliding groove through the connecting rod 15, the anchor rod 3 is supported on the connecting rod 15 through the anchor head sliding piece 12 and used for pushing the connecting rod 15 and driving the rising shell anchoring piece 13 and the rising shell anchoring piece 14 to move along the anchor head sliding piece 12, and the anchor rod is supported on the connecting rod by pushing the anchor rod, so that the rising shell anchoring piece and the rising shell anchoring piece are supported, the contact area of the inner side surrounding rock of the drilled hole is increased, the friction resistance between the anchor rod and the surrounding rock is increased, and the anchoring effect of the anchor rod is enhanced.
A plurality of shell-expanding locking plates 16 are respectively arranged on the sides of the upwelling anchoring piece 13 and the downwelling anchoring piece 14, which are contacted with the side wall of the surrounding rock, and are used for increasing the friction force between the upwelling anchoring piece 13 and the downwelling anchoring piece 14 and the side wall of the surrounding rock at the inner side of the drill hole and increasing the contact area between the anchor head and the surrounding rock; the friction resistance between the anchor rod and the surrounding rock is increased, and the anchoring effect of the anchor rod is enhanced.
According to fig. 5 and 6, the sealing assembly comprises a gasket 5, a nut 6 and a stop-grouting plug 9; stop thick liquid stopper 9 and packing ring 5 embolia the tail end of stock 3 in proper order, and wherein stop thick liquid stopper 9 stopper tightly sets up in the outer port of protective tube 2, and packing ring 5 lid sets up on the outer port of protective tube 2, nut 6 threaded connection is at the tail end of stock 3, and the top tightly sets up on packing ring 5, and seal assembly has strengthened the leakproofness to protective tube and drilling, avoids the slip casting excessive. The extension of the gasket 5 is fixedly provided with a backing plate 7 for increasing the stress intensity of the tail part of the anchor rod. Be equipped with the stressmeter 10 on the stock 3, the stressmeter 10 encircles nut 6 and sets up, and the effectual prestressing force that carries on nut 6 measures. The sealing assembly further comprises an exhaust pipe 8, wherein the exhaust pipe 8 is inserted into the protection pipe 2 through a gasket 5 and a grout stopper 9 for discharging air in the protection pipe.
The mouth of pipe of slip casting pipe 11 stretches into the inboard one end setting of protection tube 2 along the body of protection tube 2, by the inboard one end of protection tube 2 to the filling cement mortar of the 2 outside one ends of protection tube, can effectually detect the filling condition of the cement mortar in the protection tube through the slip casting of slip casting pipe.
According to fig. 4, the protective tube 2 is provided with a plurality of mortar outlets 4 along the tube body, which facilitates effective filling of the inside of the drilled hole.
The expansion shell type anchoring head is a phi 70 expansion shell type anchoring head; the anchor rod consists of a phi 32 expanding shell type prestressed hollow anchor rod; the nut 6 is arranged at the bottom of the anchor rod 3 structure and faces the center of the rod body and is used for fixing the anchor rod and the spherical washer. The gasket 5 is a spherical gasket which is composed of a cylindrical circular ring metal block and is arranged at the junction of the bottom of the anchor rod and the nut, the grouting guide pipe 11 is composed of a 105mm steel pipe, the bottom of the grouting guide pipe 11 is arranged in the anchor rod 3, and the gate is exposed around the nut 6 for grouting and exhausting.
The anchor rod belongs to an anchor rod with an anchored end, a wedge-shaped shell expanding head made of metal is arranged at the front end of the anchor rod, the anchor rod is sent to a hole position drilled in advance on surrounding rock and then pulled backwards, the shell expanding head can slide, friction force is generated on a contact surface of the shell expanding head and the surrounding rock, and then a nut is screwed; a phi 32 hollow anchor rod is arranged in a drill hole with the diameter of 75mm, the length of the anchor rod 3 is 5m, and meanwhile, the anchoring capability is required to meet the strength requirement through inspection.
After the tunnel face of the tunnel is excavated in the step, the surrounding rock is immediately sealed to prevent excessive disturbance of the stability of the surrounding rock, and the loose rock is connected into a whole by adopting a phi 32 expanding-shell type prestressed hollow anchor rod, so that the strength is improved. Compared with the traditional anchor rod. Thereby the shell-expanding type anchor head improves contact resistance through the area of contact of increase anchor head and surrounding rock stratum, sets up prestressing force to stock and anchor head and satisfies intensity design standard, and the cavity stock is in the in-process of packing into between two parties as far as possible. And then grouting, water plugging and reinforcing are carried out, M35 type cement mortar is used for injection, the water cement ratio of the cement mortar is controlled, the grouting pressure is controlled to be below 0.8MPa, and the anchoring force of the anchoring head of the expansion shell is not less than 1.4 times of the designed prestress value.
The invention relates to a use method of an anchor rod structure for fixing water-rich karst tunnel surrounding rocks, which is based on the anchor rod structure and comprises the following steps:
arranging holes at the surrounding rock of the fixed water-rich karst tunnel, drilling, checking the holes, cleaning the holes and leveling the hole openings; inserting the protection tube 2 into the drill hole, inserting the anchoring assembly into the protection tube 2, and enabling the expansion shell type anchoring head of the anchoring assembly to be in contact with the inner side surrounding rock of the drill hole, so that the friction force between the expansion shell type anchoring head and the side wall of the inner side surrounding rock of the drill hole is increased; the sealing assembly seals the drilling hole and the protection pipe 2; and grouting the inside of the drill hole through the sealing assembly until the drill hole is filled with the slurry, and finishing the work.
Examples
According to the illustration of fig. 7, firstly, a construction preparation step is carried out, and the proper anchor rod hole distribution position is confirmed in advance; then, mechanically drilling holes on the rough feeling, wherein the hole diameter of each drilled hole is not less than 75mm, the hole depth is not less than 5m and not more than 5.1m, the axial deflection rate of the anchor rod drilled hole is not more than 2% of the rod length, checking the drilled holes and manually removing and leveling the drilled holes, and the prestress application rate after leveling the hole opening cannot be more than 50 KN/min;
assembling an expansion shell type anchoring head 1, an anchor rod 3, a grouting guide pipe 11 and a grout stop plug 9; after excavating a tunnel face, immediately sealing surrounding rock, installing a shell expansion type prestressed hollow anchor rod of a phi 32 hollow anchor rod and a phi 70 anchor head in a hole with the diameter phi 75mm of the drilled hole, checking whether the anchoring force of the anchor rod can meet the design requirement, centering the anchor rod 3 as much as possible when the anchor rod is installed in the hole, and putting the protective tube 2 into the drilled hole, wherein the thickness of a protective layer of the rod body is not less than 20 mm; when the anchor rod 3 is arranged in the protective tube 2, the grouting guide tube 11 is protected and fixed, so that the situation that grout cannot fill the hole due to tube blockage is avoided; the gasket 5 is installed, in the embodiment, the gasket 5 adopts a spherical gasket, a cushion plate 7, a stress meter 10 and a nut 6, the size of the cushion plate 7 is 20cm (length) multiplied by 20cm (width) multiplied by 10mm (thickness), and when the cushion plate 7 is subjected to 1.3 times of pretensioning force, the permanent deformation delta 1.3 of the cushion plate 7 in the height direction is not more than 5%. When the load value born by the backing plate 7 reaches the ultimate tensile force of the bolt body, the permanent deformation delta R of the backing plate 7 in the height direction is not more than 30 percent, the hemispherical washer meets the requirement that the rotation of the bolt body in any direction is not less than 100 percent, and the ultimate pull-off force of the nut 6 is not less than the ultimate tensile force of the bolt body of the hollow prestressed bolt and ensures that the grout stop plug completely seals the bottom of the bolt; designing the phi 32 expanding shell type prestress hollow anchor rod with prestress of 90KN, locking the initial prestress of 60KN and applying prestress of 69Kn to the anchor rod by using a torque wrench; and (4) measuring the prestress loss value after 24h, and testing the anchoring force of the anchoring head after the anchor rod prestress loss test is finished.
Increasing the tension prestress of the anchor rod 3 to 84Kn, detecting to determine that the anchoring force of the anchoring head of the expansion shell is not less than 1.4 times of the designed prestress value, grouting after the anchoring force test of the anchor head is qualified, and additionally, randomly knocking the rod body and hanging a heavy object on the rod body after applying the prestress; m35 cement mortar is adopted for grouting, the water cement ratio of the grout is controlled, the grouting pressure is controlled to be below 0.8MPa, and the fullness degree in a grouting hole is judged continuously by the grouting amount and the grout discharged by a grout overflow pipe; and (4) carrying out anchor rod quality evaluation, and carrying out reinforcement treatment on the anchor rod which does not reach the expected strength.
By adopting the technical scheme, the construction method is simple in structure, reasonable in collocation construction process, convenient to operate and use, obvious in effect and low in cost, not only ensures the strength of the construction safety surrounding rock, but also reduces the construction time of workers, and is suitable for popularization and application in water-rich karst tunnel construction.
The above-mentioned contents are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modification made on the basis of the technical idea of the present invention falls within the protection scope of the claims of the present invention.
Claims (10)
1. The anchor rod structure for fixing the water-rich karst tunnel surrounding rock is characterized by comprising a protection pipe (2) inserted into a drill hole and an anchor assembly inserted into the protection pipe (2); the protection pipe (2) is arranged in a penetrating manner, and the anchoring assembly comprises an expansion shell type anchoring head (1), an anchor rod (3) and a sealing assembly; one end of the anchor rod (3) is provided with an expansion shell type anchoring head (1); wherein the expanding shell type anchoring head (1) is contacted with the surrounding rock at the inner side of the drill hole through the protection pipe (2); the other end of the anchor rod (3) is provided with a sealing component for sealing the drilling hole and the protection tube (2); the sealing component is inserted with a grouting guide pipe (11), cement mortar is injected into the protection pipe (2) through the grouting guide pipe (11), and the protection of the protection pipe (2) on the anchoring component and the enhancement of the fixed strength of the surrounding rock drilling are achieved.
2. The anchor rod structure for fixing water-rich karst tunnel surrounding rock according to claim 1, wherein the expanding-shell type anchor head (1) comprises an anchor head slider (12), an expanding-shell anchor member (13) and a expanding-shell anchor member (14); one end of the rising shell anchoring piece (13) is connected with one end of the falling shell anchoring piece (14) through a connecting rod (15); the anchor head sliding part (12) is provided with a sliding groove, the rising shell anchoring part (13) and the rising shell anchoring part (14) are driven to move along the anchor head sliding part (12) when the rising shell anchoring part (13) and the rising shell anchoring part (14) move in the sliding groove through the connecting rod (15), and the anchor rod (3) is propped against the connecting rod (15) through the anchor head sliding part (12) and is used for pushing the connecting rod (15) and driving the rising shell anchoring part (13) and the rising shell anchoring part (14) to move along the anchor head sliding part (12).
3. The anchor rod structure for fixing the water-rich karst tunnel surrounding rock of claim 2, wherein the side of the rising shell anchoring member (13) and the rising shell anchoring member (14) contacting the surrounding rock side wall is respectively provided with a plurality of rising shell locking plates (16) for increasing the friction force between the rising shell anchoring member (13) and the rising shell anchoring member (14) and the inner surrounding rock side wall of the drill hole.
4. A rock bolt structure for fixing water-rich karst tunnel surrounding rock according to claim 1, characterized in that the sealing assembly comprises a washer (5), a nut (6) and a grout stop plug (9); the grout stopping plug (9) and the gasket (5) are sequentially sleeved into the tail end of the anchor rod (3), wherein the grout stopping plug (9) is tightly plugged in an outer port of the protection pipe (2), the gasket (5) is covered on the outer port of the protection pipe (2), the nut (6) is in threaded connection with the tail end of the anchor rod (3), and the top of the nut is tightly arranged on the gasket (5).
5. A bolt structure for fixing water-rich karst tunnel surrounding rock according to claim 4, characterized in that the outward extension of the washer (5) is fixedly provided with a backing plate (7).
6. The anchor rod structure for fixing the water-rich karst tunnel surrounding rock according to claim 4, characterized in that the anchor rod (3) is provided with a stress meter (10), and the stress meter (10) is arranged around the nut (6).
7. A bolt structure for fixing water-rich karst tunnel surrounding rock according to claim 4, characterized by further comprising an exhaust pipe (8), wherein the exhaust pipe (8) is inserted into the protection pipe (2) through a gasket (5) and a grout stop plug (9).
8. The anchor rod structure for fixing the water-rich karst tunnel surrounding rock according to claim 1, wherein the pipe orifice of the grouting guide pipe (11) is arranged along the pipe body of the protection pipe (2) to extend into one end of the inner side of the protection pipe (2), and cement mortar is filled from one end of the inner side of the protection pipe (2) to one end of the outer side of the protection pipe (2).
9. A bolting configuration for fixing water-rich karst tunnel surrounding rock according to claim 1, characterised in that said protective tube (2) is provided with a number of mortar outlet holes (4) along the tube.
10. Use method of a bolt structure for fixing water-rich karst tunnel surrounding rock, based on any one of claims 1-9, characterized by comprising the following steps:
arranging holes at the surrounding rock of the fixed water-rich karst tunnel, drilling, checking the holes, cleaning the holes and leveling the hole openings; inserting the protection tube (2) into the drill hole, inserting the anchoring assembly into the protection tube (2), and enabling the expansion-shell type anchoring head of the anchoring assembly to be in contact with the inner side surrounding rock of the drill hole, so that the friction force between the expansion-shell type anchoring head and the side wall of the inner side surrounding rock of the drill hole is increased; the sealing assembly seals the drilling hole and the protection pipe (2); and grouting the inside of the drill hole through the sealing assembly until the drill hole is filled with the slurry, and finishing the work.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110548146.XA CN113107564A (en) | 2021-05-19 | 2021-05-19 | Anchor rod structure for fixing water-rich karst tunnel surrounding rock and using method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110548146.XA CN113107564A (en) | 2021-05-19 | 2021-05-19 | Anchor rod structure for fixing water-rich karst tunnel surrounding rock and using method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113107564A true CN113107564A (en) | 2021-07-13 |
Family
ID=76722668
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110548146.XA Pending CN113107564A (en) | 2021-05-19 | 2021-05-19 | Anchor rod structure for fixing water-rich karst tunnel surrounding rock and using method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113107564A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116290036A (en) * | 2023-05-17 | 2023-06-23 | 山东建筑大学 | Prestressed expanded pipe supporting structure for rock and soil body and construction process |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3090203A (en) * | 1958-03-03 | 1963-05-21 | Anciens Ets Goldenberg & Cie | Support plate for an anchoring device |
| CN104373144A (en) * | 2013-08-12 | 2015-02-25 | 高原 | Expansive high-pressure hole sealing hollow slurry/grease injecting anchor rod |
| CN108343458A (en) * | 2018-05-16 | 2018-07-31 | 山东科技大学 | Overall length bonds large deformation pressure-relieving achor bar and its construction method |
| CN109209455A (en) * | 2018-09-26 | 2019-01-15 | 浙江普泰克金属制品有限公司 | A kind of expansion shell type prestressing force hollow grouting anchor with plasma resistance plug |
| CN208950616U (en) * | 2018-09-26 | 2019-06-07 | 浙江普泰克金属制品有限公司 | A kind of expansion shell type prestressing force hollow grouting anchor with plasma resistance plug |
| CN212563291U (en) * | 2020-06-11 | 2021-02-19 | 成都现代万通锚固技术有限公司 | Let pressure stock |
| CN112459815A (en) * | 2020-10-30 | 2021-03-09 | 高军 | Method for arranging prestressed anchor rod in water-rich weak crushing surrounding rock tunnel |
-
2021
- 2021-05-19 CN CN202110548146.XA patent/CN113107564A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3090203A (en) * | 1958-03-03 | 1963-05-21 | Anciens Ets Goldenberg & Cie | Support plate for an anchoring device |
| CN104373144A (en) * | 2013-08-12 | 2015-02-25 | 高原 | Expansive high-pressure hole sealing hollow slurry/grease injecting anchor rod |
| CN108343458A (en) * | 2018-05-16 | 2018-07-31 | 山东科技大学 | Overall length bonds large deformation pressure-relieving achor bar and its construction method |
| CN109209455A (en) * | 2018-09-26 | 2019-01-15 | 浙江普泰克金属制品有限公司 | A kind of expansion shell type prestressing force hollow grouting anchor with plasma resistance plug |
| CN208950616U (en) * | 2018-09-26 | 2019-06-07 | 浙江普泰克金属制品有限公司 | A kind of expansion shell type prestressing force hollow grouting anchor with plasma resistance plug |
| CN212563291U (en) * | 2020-06-11 | 2021-02-19 | 成都现代万通锚固技术有限公司 | Let pressure stock |
| CN112459815A (en) * | 2020-10-30 | 2021-03-09 | 高军 | Method for arranging prestressed anchor rod in water-rich weak crushing surrounding rock tunnel |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116290036A (en) * | 2023-05-17 | 2023-06-23 | 山东建筑大学 | Prestressed expanded pipe supporting structure for rock and soil body and construction process |
| CN116290036B (en) * | 2023-05-17 | 2023-08-22 | 山东建筑大学 | Prestressed expanded pipe supporting structure for rock and soil body and construction process |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104763436B (en) | A kind of push-bench method of reseptance under high hydraulic pressure complex geological condition and device | |
| Ostermayer | PAPER 18 Construction, carrying behaviour and creep characteristics of ground anchors | |
| KR101500667B1 (en) | steel pipe grouting device and tunnel reinforcement andbarrier grouting method using this | |
| CN103742129B (en) | The method of weak seam measuring gas pressure of coal bed by drilling hole | |
| CN206090653U (en) | Anchor rod static pressure pile slip casting structure | |
| CN110454206B (en) | Prestressed anchor cable, anchor rod and anchor cable combined support system and soft rock stratum support process | |
| CN205226624U (en) | Combination wherein of push pipe then within a definite time | |
| Littlejohn | Overview of rock anchorages | |
| CN108756809B (en) | Hole sealing method for shield tunnel geological exploration drilling | |
| KR100934196B1 (en) | Pressure type small pile for bearing bidirectional applied force and preventive methods for the buoyancy in construction using the same | |
| CN101324064B (en) | Controllable expansion extrusion soil body apparatus for geotechnical engineering and use thereof | |
| CN215169870U (en) | A water installation is prevented gushing in drill way for horizontal directional drilling engineering geological survey | |
| CN113107564A (en) | Anchor rod structure for fixing water-rich karst tunnel surrounding rock and using method thereof | |
| CN104455724B (en) | Under high hydraulic condition, push-bench receives device and method of reseptance | |
| CN111894625B (en) | Large-section weak surrounding rock high-prestress anchor rod supporting method and device | |
| CN101705788A (en) | Construction method using blowout plug to shield oblique drilling hole | |
| CN105507929B (en) | A kind of method that repetition applies prestressed cable bolting | |
| CN102979105A (en) | Underground water control method of wellhole grouting and seepage insulation | |
| CN101250989A (en) | Surface drilling down-hole sealing technique without unpackaging condition | |
| CN115787693A (en) | Water stopping method for water gushing in deep foundation pit under riverside slow-dip interbed | |
| CN213476859U (en) | Prestressed anchor cable structure suitable for broken rock mass | |
| CN110778332B (en) | Reducing self-adaptive expansion grouting device for cracked and damaged part of secondary lining of tunnel and reinforcing method | |
| CN202672165U (en) | Grouting water-blocking cofferdam | |
| CN112176994A (en) | Prestressed anchor cable structure suitable for broken rock mass and construction method thereof | |
| CN110411643B (en) | Monitoring device and method for slurry pressure of hollow grouting anchor cable |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |