CN111561337A - Device and method for arranging prestressed anchor rod in water-rich weak crushing surrounding rock tunnel - Google Patents
Device and method for arranging prestressed anchor rod in water-rich weak crushing surrounding rock tunnel Download PDFInfo
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- CN111561337A CN111561337A CN202010194684.9A CN202010194684A CN111561337A CN 111561337 A CN111561337 A CN 111561337A CN 202010194684 A CN202010194684 A CN 202010194684A CN 111561337 A CN111561337 A CN 111561337A
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- 239000011435 rock Substances 0.000 title claims abstract description 33
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 11
- 230000007246 mechanism Effects 0.000 claims abstract description 16
- 230000005540 biological transmission Effects 0.000 claims abstract description 11
- 239000002002 slurry Substances 0.000 claims description 14
- 230000009471 action Effects 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- 238000005056 compaction Methods 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 4
- 238000010276 construction Methods 0.000 claims 1
- 238000005452 bending Methods 0.000 abstract description 3
- 238000010008 shearing Methods 0.000 abstract description 3
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000004873 anchoring Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
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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
- E21D21/008—Anchoring or tensioning means
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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
- 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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- 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
- E21D21/0093—Accessories
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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 provides a device and a method for driving a prestressed anchor rod in a water-rich soft and weak broken surrounding rock tunnel, which belong to the field of tunnel engineering machinery, and the device comprises a locking mechanism, wherein the locking mechanism comprises a mounting seat, a screw rod, a nut, a locking rod and a through hole, the nut is in threaded transmission connection on the screw rod, the nut is fixed at one end part of the locking rod, the locking rod slides in the through hole, the through hole is formed in the outer wall of the mounting seat, a driving mechanism comprises a first bevel gear, a second bevel gear and a rotating shaft, the first bevel gear is fixed at one end part of the screw rod, the second bevel gear is in transmission connection with the first bevel gear, the second bevel gear is fixed on the rotating shaft, the rotating shaft penetrates through the mounting seat to lock the anchor rod in the radial position, and further greatly improve the bearing capacity of the anchor rod in the tunnel for transverse shearing force and bending force, the service life of the anchor rod is prolonged, and the firmness of the tunnel is enhanced.
Description
Technical Field
The invention relates to the field of tunnel engineering machinery, in particular to a device and a method for driving a pre-stressed anchor rod in a water-rich weak broken surrounding rock tunnel.
Background
A tunnel is a building constructed underground or underwater or in a mountain, with railways or roads for motor vehicles to pass through. The tunnel can be divided into three categories of mountain tunnels, underwater tunnels and urban tunnels according to the positions of the tunnels. A tunnel traversing from a mountain or under a hill to shorten the distance and avoid a large slope is called a mountain tunnel; underwater tunnels passing under a river or sea floor to cross a river or channel; urban tunnels are used to cross underground cities to meet the needs of railways to pass through large cities. The most constructed of these three types of tunnels are mountain tunnels.
In order to increase holistic intensity when the tunnel is built, need squeeze into the stock inside the tunnel, in the lower rock mass of intensity such as soft breakage, tunnel country rock deflection is very big, leads to a large amount of broken failure conditions to have appeared in the broken soft rock tunnel in the deep anchor rod. Through the discovery of the failed anchor rod excavated after the underground tunnel collapses, the anchor rod in the karst soft rock tunnel not only bears the action of single axial tension, but also bears the action of transverse shearing and bending.
Disclosure of Invention
In order to make up for the defects, the invention provides a device and a method for driving a prestressed anchor rod in a water-rich weak broken surrounding rock tunnel, and aims to solve the problem that the anchor rod in the water-rich weak broken surrounding rock tunnel is easy to lose effectiveness and break.
The invention is realized by the following steps:
the device for driving the prestressed anchor rod in the water-rich weak broken surrounding rock tunnel comprises a locking mechanism, wherein the locking mechanism comprises a mounting seat, a screw rod, a nut, a locking rod and a through hole, the nut is in threaded transmission connection with the screw rod, the nut is fixed at one end of the locking rod, the locking rod slides in the through hole, and the through hole is formed in the outer wall of the mounting seat;
the driving mechanism comprises a first bevel gear, a second bevel gear and a rotating shaft, the first bevel gear is fixed at the end part of one end of the screw, the second bevel gear is in transmission connection with the first bevel gear, the second bevel gear is fixed on the rotating shaft, and the rotating shaft penetrates through the mounting seat.
In one embodiment of the invention, the upper end and the lower end of the mounting seat are both fixed with an anchor rod, and the two ends of the rotating shaft are rotatably connected with the anchor rods through bearings.
In an embodiment of the invention, a first connecting block is fixed at one end of the rotating shaft, the first connecting block is located outside the anchor rod, a grouting channel is formed in the centers of the rotating shaft and the first connecting block, the grouting channel penetrates through the rotating shaft, and a second connecting block is fixed on the outer side of one end of the anchor rod close to the first connecting block.
In an embodiment of the present invention, an avoiding hole is formed in the middle of the second connecting block, and the first connecting block is located in the avoiding hole.
In one embodiment of the invention, the outer side of the anchor rod is in threaded transmission connection with a fixed disc, the fixed disc is provided with a mounting hole, and the inner side of the fixed disc is provided with a groove.
In one embodiment of the invention, a limiting block is fixed at one end of the screw rod far away from the first bevel gear, and the limiting block is positioned in the middle of the inside of the locking rod.
In one embodiment of the invention, sliding grooves are symmetrically formed in two sides of an outer cylindrical surface of the locking rod, sliding blocks are connected in the sliding grooves in a sliding mode, and the sliding blocks are fixed on the inner wall of the through hole.
In one embodiment of the present invention, the locking mechanism is provided with three sets and distributed on the mounting seat in an equal angle.
In one embodiment of the invention, the second connecting block and the anchor rod are fixed together through bolts.
The embodiment of the application provides a use method of a pre-stressed anchor rod in a water-rich weak broken surrounding rock tunnel, which is carried out by utilizing the pre-stressed anchor rod in the water-rich weak broken surrounding rock tunnel, and comprises the following steps:
the method comprises the following steps: firstly, placing a fixed disk at a preset position of a tunnel, and then fixing the fixed disk on the tunnel through a mounting hole by using a screw;
step two: then, one end of the anchor rod is screwed to the fixed disc, then the second connecting block is fixed to the end, far away from the fixed disc, of the anchor rod through a bolt, then the second connecting block is fixedly connected with the output end of the driving motor, the driving motor is started, the driving motor further drives the anchor rod to rotate, the anchor rod is driven into the tunnel under the driving of the fixed disc until the second connecting block is in contact with the outer end face of the fixed disc, after the anchor rod is inserted into the tunnel, the fixed disc can generate outward elastic force under the action of the groove, and then outward tensile force is generated on the anchor rod, and further prestress is applied to the anchor rod;
step three: then the driving motor is separated from the second connecting block, the second connecting block is detached from the anchor rod, the first connecting block leaks out at the moment, and then the first connecting block is fixedly connected with the output end of the driving motor;
step four: the driving motor drives the rotating shaft to rotate through the first connecting block, the rotating shaft drives the second bevel gear to rotate, the rotation of the second bevel gear drives the first bevel gear to rotate, the first bevel gear drives the screw to rotate, the rotation of the screw drives the nut to move forwards along the screw, the nut drives the locking rods to slide outwards in the through holes, and then the three groups of locking rods penetrate out of the mounting seat simultaneously and are inserted into surrounding rocks around the anchor rod, so that the radial locking of the anchor rod is realized;
step five: when a limiting block at the front end of the screw rod is in contact with the inner side of the nut, the locking rod stops sliding, the locking rod is locked, the driving motor is separated from the first connecting block, early-strength slurry is added into the slurry, and the water hardening grouting material with adjustable setting time has the characteristics of super early strength, high strength, micro expansion, self compaction, self leveling and good grouting property, and then the slurry is injected into the anchor rod through the grouting channel, so that the whole grouting work is finished.
The invention has the beneficial effects that: according to the invention, after the anchor rod is driven into the tunnel, the second bevel gear is driven to rotate through the rotating shaft, the first bevel gear is driven to rotate by the rotation of the second bevel gear, the screw rod is driven to rotate by the first bevel gear, the nut is driven to move forwards along the screw rod by the rotation of the screw rod, the locking rod is driven by the nut to slide forwards in the through hole along the screw rod, the locking rod penetrates out of the mounting seat and is inserted into surrounding rocks around the anchor rod, the radial position of the anchor rod is locked, the bearing capacity of the anchor rod in the tunnel on transverse shearing and bending forces is greatly improved, the service life of the anchor rod is prolonged, and the firmness of the tunnel is.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic view of the installation positions of an anchor rod, a fixed plate and a second connecting block provided by the embodiment of the invention;
fig. 2 is a schematic view of an installation position relationship between an anchor rod and a rotating shaft according to an embodiment of the present invention;
FIG. 3 is an enlarged view of the location A in FIG. 2;
fig. 4 is a schematic view of the inner structures of the mounting seat, the locking rod and the anchor rod provided by the embodiment of the invention;
fig. 5 is an exploded view of a locking bar and screw and a mounting seat provided in accordance with an embodiment of the present invention;
FIG. 6 is a schematic view of an internal structure of a mounting base according to an embodiment of the present invention;
fig. 7 is a schematic structural view of a fixing disk according to an embodiment of the present invention.
In the figure: 100-a locking mechanism; 110-a mount; 111-screw; 112-a nut; 113-a locking lever; 114-a through hole; 115-a limiting block; 116-a chute; 117-a slider; 200-a drive mechanism; 210-a first bevel gear; 211-second bevel gear; 212-a rotating shaft; 213-first connection block; 214-a grouting channel; 300-anchor rod; 310-fixed disk; 311-mounting holes; 312-a groove; 320-a second connection block; 321-avoiding holes; 330-external thread.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
Examples
Referring to fig. 1, fig. 4 and fig. 6, the present invention provides a technical solution: the device for driving the pre-stressed anchor rod in the water-rich weak broken surrounding rock tunnel comprises a locking mechanism 100, wherein the locking mechanism 100 comprises a mounting seat 110, a screw 111, a nut 112, a locking rod 113 and a through hole 114, the nut 112 is in threaded transmission connection with the screw 111, the nut 112 is fixed at one end of the locking rod 113, the locking rod 113 slides in the through hole 114, and the through hole 114 is formed in the outer wall of the mounting seat 110;
referring to fig. 4, in order to prevent the locking rod 113 from sliding out of the screw 111 when moving forward, a limiting block 115 is fixed at an end of the screw 111 away from the first bevel gear 210, and the limiting block 115 is located in the middle of the inside of the locking rod 113, such that the limiting block 115 limits the locking rod 113.
Referring to fig. 5, in order to prevent the locking rod 113 from rotating along with the screw 111, sliding grooves 116 are symmetrically formed on two sides of an outer cylindrical surface of the locking rod 113, a sliding block 117 is slidably connected in the sliding groove 116, and the sliding block 117 is fixed on an inner wall of the through hole 114 to prevent the locking rod 113 from rotating, so that the screw 111 drives the locking rod 113 to slide forward in the through hole 114.
Referring to fig. 2 and 3, the locking mechanism 100 is provided with three groups and is distributed on the mounting seat 110 at equal angles, so that the locking rods 113 are inserted into the tunnel in three directions around the anchor rod 300, and the firmness and stability of the anchor rod 300 after being driven into the tunnel are improved.
Referring to fig. 2, 3 and 4, the driving mechanism 200 includes a first bevel gear 210, a second bevel gear 211 and a rotating shaft 212, the first bevel gear 210 is fixed at one end of the screw 111, the second bevel gear 211 is in transmission connection with the first bevel gear 210, the second bevel gear 211 is fixed on the rotating shaft 212, and the rotating shaft 212 penetrates through the mounting seat 110.
Referring to fig. 1 and 7, anchor rods 300 are fixed at both upper and lower ends of the mounting base 110, so that in order to facilitate positioning and mounting between the anchor rods 300 and the tunnel, a fixing plate 310 is connected to the outer side of the anchor rods 300 in a threaded transmission manner, mounting holes 311 are formed in the fixing plate 310, and grooves 312 are formed in the inner side of the fixing plate 310, so that the fixing plate 310 can generate outward elastic force under the effect of the grooves 312 when the anchor rods 300 are mounted, and further generate outward tensile force on the anchor rods 300, thereby implementing prestress application on the anchor rods 300, and enabling the anchoring force generated by the anchor rods 300 to apply a certain pre-compressive stress on the surrounding rock, thereby actively reinforcing the surrounding rock.
Referring to fig. 1, 2 and 3, two ends of the rotating shaft 212 are rotatably connected to the anchor rod 300 through bearings, a first connecting block 213 is fixed to one end of the rotating shaft 212, the first connecting block 213 is located outside the anchor rod 300, a grouting channel 214 is formed in the center of the rotating shaft 212 and the first connecting block 213, the grouting channel 214 penetrates through the rotating shaft 212, a second connecting block 320 is fixed to the outer side of the end of the anchor rod 300 close to the first connecting block 213, the first connecting block 213 is used for connecting the rotating shaft 212 to the driving motor, the second connecting block 320 is used for connecting the anchor rod 300 to the driving motor, and the grouting channel 214 can inject slurry into the anchor rod 300 and then flow around the anchor rod 300 through a slurry outlet on the anchor rod 300 to realize grouting of the anchor rod 300.
Referring to fig. 1, in order to prevent the second connecting block 320 from being mounted on the anchor rod 300, an avoiding hole 321 is formed in the middle of the second connecting block 320, and the first connecting block 213 is located in the avoiding hole 321 to perform an avoiding protection function.
The embodiment of the application provides a use method of a pre-stressed anchor rod in a water-rich weak broken surrounding rock tunnel, which is carried out by utilizing the pre-stressed anchor rod in the water-rich weak broken surrounding rock tunnel, and comprises the following steps:
the method comprises the following steps: first, the fixing plate 310 is placed at a predetermined position of the tunnel, and then the fixing plate 310 is fixed to the tunnel by means of screws through the mounting holes 311;
step two: then, one end of the anchor rod 300 is screwed to the fixed disc 310, then the second connecting block 320 is fixed to one end, far away from the fixed disc 310, of the anchor rod 300 through a bolt, then the second connecting block 320 is fixedly connected with the output end of the driving motor, the driving motor is started, further the driving motor drives the anchor rod 300 to rotate, the anchor rod 300 is driven into the tunnel by the driving of the fixed disc 310 until the second connecting block 320 is in contact with the outer end face of the fixed disc 310, after the anchor rod 300 is inserted into the tunnel, the fixed disc 310 can generate outward elastic force under the action of the groove 312, further outward tensile force is generated on the anchor rod 300, and further prestress is applied to the anchor rod 300;
step three: then, the driving motor is separated from the second connecting block 320, the second connecting block 320 is detached from the anchor rod 300, at the moment, the first connecting block 213 leaks out, and then the first connecting block 213 is fixedly connected with the output end of the driving motor;
step four: the driving motor drives the rotating shaft 212 to rotate through the first connecting block 213, the rotating shaft 212 drives the second bevel gear 211 to rotate, the rotation of the second bevel gear 211 drives the first bevel gear 210 to rotate, the first bevel gear 210 drives the screw 111 to rotate, the rotation of the screw 111 drives the nut 112 to move forward along the screw 111, the nut 112 drives the locking rods 113 to slide outwards in the through holes 114, and then the three groups of locking rods 113 penetrate through the mounting seat 110 and are inserted into surrounding rocks around the anchor rod 300 at the same time, so that the radial locking of the anchor rod is realized;
step five: when the limiting block 115 at the front end of the screw 111 contacts with the inner side of the nut 112, the locking rod 113 stops sliding, the locking rod 113 is locked, the driving motor is separated from the first connecting block 213, early-strength slurry is added into the slurry, the setting time of the hydraulic grouting material is adjustable, the hydraulic grouting material has the characteristics of super early strength, high strength, micro expansion, self compaction, self leveling and good grouting performance, then the slurry is injected into the anchor rod 300 through the grouting channel 214, and the whole grouting work is finished.
The working principle is as follows: first, the fixing plate 310 is placed at a predetermined position of the tunnel, and then the fixing plate 310 is fixed to the tunnel by means of screws through the mounting holes 311;
then, one end of the anchor rod 300 is screwed to the fixed disc 310, then the second connecting block 320 is fixed to one end, far away from the fixed disc 310, of the anchor rod 300 through a bolt, then the second connecting block 320 is fixedly connected with the output end of the driving motor, the driving motor is started, further the driving motor drives the anchor rod 300 to rotate, the anchor rod 300 is driven into the tunnel by the driving of the fixed disc 310 until the second connecting block 320 is in contact with the outer end face of the fixed disc 310, after the anchor rod 300 is inserted into the tunnel, the fixed disc 310 can generate outward elastic force under the action of the groove 312, further outward tensile force is generated on the anchor rod 300, and further prestress is applied to the anchor rod 300;
then, the driving motor is separated from the second connecting block 320, the second connecting block 320 is detached from the anchor rod 300, at the moment, the first connecting block 213 leaks out, and then the first connecting block 213 is fixedly connected with the output end of the driving motor;
the driving motor drives the rotating shaft 212 to rotate through the first connecting block 213, the rotating shaft 212 drives the second bevel gear 211 to rotate, the rotation of the second bevel gear 211 drives the first bevel gear 210 to rotate, the first bevel gear 210 drives the screw 111 to rotate, the rotation of the screw 111 drives the nut 112 to move forward along the screw 111, the nut 112 drives the locking rods 113 to slide outwards in the through holes 114, and then the three groups of locking rods 113 penetrate through the mounting seat 110 and are inserted into surrounding rocks around the anchor rod 300 at the same time, so that the radial locking of the anchor rod is realized;
when the limiting block 115 at the front end of the screw 111 contacts with the inner side of the nut 112, the locking rod 113 stops sliding, the locking rod 113 is locked, the driving motor is separated from the first connecting block 213, early-strength slurry is added into the slurry, the setting time of the hydraulic grouting material is adjustable, the hydraulic grouting material has the characteristics of super early strength, high strength, micro expansion, self compaction, self leveling and good grouting performance, then the slurry is injected into the anchor rod 300 through the grouting channel 214, and the whole grouting work is finished.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The device for driving the prestressed anchor rod in the water-rich weak crushing surrounding rock tunnel is characterized by comprising
The locking mechanism (100) comprises an installation seat (110), a screw (111), a nut (112), a locking rod (113) and a through hole (114), wherein the nut (112) is in threaded transmission connection with the screw (111), the nut (112) is fixed at one end of the locking rod (113), the locking rod (113) slides in the through hole (114), and the through hole (114) is formed in the outer wall of the installation seat (110);
the driving mechanism (200) comprises a first bevel gear (210), a second bevel gear (211) and a rotating shaft (212), the first bevel gear (210) is fixed at one end of the screw (111), the second bevel gear (211) is in transmission connection with the first bevel gear (210), the second bevel gear (211) is fixed on the rotating shaft (212), and the rotating shaft (212) penetrates through the mounting seat (110).
2. The device for driving the prestressed anchor rod into the water-rich weak broken surrounding rock tunnel according to claim 1, wherein the anchor rod (300) is fixed at both the upper end and the lower end of the mounting seat (110), and both ends of the rotating shaft (212) are rotatably connected with the anchor rod (300) through bearings.
3. The device for driving the prestressed anchor rod into the water-rich weak broken surrounding rock tunnel according to claim 2, wherein a first connecting block (213) is fixed to one end of the rotating shaft (212), the first connecting block (213) is located outside the anchor rod (300), a grouting channel (214) is formed in the centers of the rotating shaft (212) and the first connecting block (213), the grouting channel (214) penetrates through the rotating shaft (212), and a second connecting block (320) is fixed to the outside of one end of the anchor rod (300) close to the first connecting block (213).
4. The device for driving the prestressed anchor rod into the water-rich weak broken surrounding rock tunnel according to claim 3, wherein an avoiding hole (321) is formed in the middle of the second connecting block (320), and the first connecting block (213) is located in the avoiding hole (321).
5. The device for driving the prestressed anchor rod into the water-rich weak broken surrounding rock tunnel according to claim 2, wherein the anchor rod (300) is in threaded transmission connection with a fixed plate (310) at the outer side, the fixed plate (310) is provided with a mounting hole (311), and the fixed plate (310) is provided with a groove (312) at the inner side.
6. The device for driving the prestressed anchor rod into the water-rich weak broken surrounding rock tunnel according to claim 1, wherein a limiting block (115) is fixed to an end of the screw rod (111) far away from the first bevel gear (210), and the limiting block (115) is located in the middle of the inside of the locking rod (113).
7. The device for driving the prestressed anchor rod into the water-rich weak broken surrounding rock tunnel according to claim 1, wherein sliding grooves (116) are symmetrically formed in two sides of the outer cylindrical surface of the locking rod (113), sliding blocks (117) are slidably connected in the sliding grooves (116), and the sliding blocks (117) are fixed on the inner wall of the through hole (114).
8. The device for driving the prestressed anchor rod into the water-rich weak broken surrounding rock tunnel according to claim 1, wherein the locking mechanism (100) is provided with three groups and distributed on the mounting seat (110) at equal angles.
9. The device for driving the prestressed anchor rod into the water-rich weak broken surrounding rock tunnel according to claim 3, wherein the second connecting block (320) and the anchor rod (300) are fixed together by bolts.
10. The use method of the prestressed anchor rod in the construction device of the water-rich weak broken surrounding rock tunnel is carried out by utilizing the prestressed anchor rod in any one of claims 1 to 9, and is characterized by comprising the following steps:
the method comprises the following steps: firstly, placing a fixed disk at a preset position of a tunnel, and then fixing the fixed disk on the tunnel through a mounting hole by using a screw;
step two: then, one end of the anchor rod is screwed to the fixed disc, then the second connecting block is fixed to the end, far away from the fixed disc, of the anchor rod through a bolt, then the second connecting block is fixedly connected with the output end of the driving motor, the driving motor is started, the driving motor further drives the anchor rod to rotate, the anchor rod is driven into the tunnel under the driving of the fixed disc until the second connecting block is in contact with the outer end face of the fixed disc, after the anchor rod is inserted into the tunnel, the fixed disc can generate outward elastic force under the action of the groove, and then outward tensile force is generated on the anchor rod, and further prestress is applied to the anchor rod;
step three: then the driving motor is separated from the second connecting block, the second connecting block is detached from the anchor rod, the first connecting block leaks out at the moment, and then the first connecting block is fixedly connected with the output end of the driving motor;
step four: the driving motor drives the rotating shaft to rotate through the first connecting block, the rotating shaft drives the second bevel gear to rotate, the rotation of the second bevel gear drives the first bevel gear to rotate, the first bevel gear drives the screw to rotate, the rotation of the screw drives the nut to move forwards along the screw, the nut drives the locking rods to slide outwards in the through holes, and then the three groups of locking rods penetrate out of the mounting seat simultaneously and are inserted into surrounding rocks around the anchor rod, so that the radial locking of the anchor rod is realized;
step five: when a limiting block at the front end of the screw rod is in contact with the inner side of the nut, the locking rod stops sliding, the locking rod is locked, the driving motor is separated from the first connecting block, early-strength slurry is added into the slurry, and the water hardening grouting material with adjustable setting time has the characteristics of super early strength, high strength, micro expansion, self compaction, self leveling and good grouting property, and then the slurry is injected into the anchor rod through the grouting channel, so that the whole grouting work is finished.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010194684.9A CN111561337A (en) | 2020-03-19 | 2020-03-19 | Device and method for arranging prestressed anchor rod in water-rich weak crushing surrounding rock tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010194684.9A CN111561337A (en) | 2020-03-19 | 2020-03-19 | Device and method for arranging prestressed anchor rod in water-rich weak crushing surrounding rock tunnel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111561337A true CN111561337A (en) | 2020-08-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010194684.9A Pending CN111561337A (en) | 2020-03-19 | 2020-03-19 | Device and method for arranging prestressed anchor rod in water-rich weak crushing surrounding rock tunnel |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201367592Y (en) * | 2009-02-16 | 2009-12-23 | 曾凡清 | Rotary-pressing pre-stressed flexible and random anchor rod |
| CN102108703A (en) * | 2010-12-20 | 2011-06-29 | 中铁隧道集团有限公司 | Adjustable prestressed anchoring device |
| CN106437800A (en) * | 2016-11-16 | 2017-02-22 | 中南大学 | Stretchable device for anchor rod anchoring force testing |
| WO2017031511A2 (en) * | 2015-08-18 | 2017-02-23 | Ncm Innovations (Ptv) Ltd | Actuator for a reactionless rock bolt tensioner |
| CN109184764A (en) * | 2018-11-01 | 2019-01-11 | 河南理工大学 | The anchor rod anchored stirring attachment device of quick detachable automatic centering and its operating method |
-
2020
- 2020-03-19 CN CN202010194684.9A patent/CN111561337A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201367592Y (en) * | 2009-02-16 | 2009-12-23 | 曾凡清 | Rotary-pressing pre-stressed flexible and random anchor rod |
| CN102108703A (en) * | 2010-12-20 | 2011-06-29 | 中铁隧道集团有限公司 | Adjustable prestressed anchoring device |
| WO2017031511A2 (en) * | 2015-08-18 | 2017-02-23 | Ncm Innovations (Ptv) Ltd | Actuator for a reactionless rock bolt tensioner |
| CN106437800A (en) * | 2016-11-16 | 2017-02-22 | 中南大学 | Stretchable device for anchor rod anchoring force testing |
| CN109184764A (en) * | 2018-11-01 | 2019-01-11 | 河南理工大学 | The anchor rod anchored stirring attachment device of quick detachable automatic centering and its operating method |
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