阅读说明：本技术 一种预应力锚杆及其施工方法 (Prestressed anchor rod and construction method thereof ) 是由 任善均 林细克 于 2020-11-18 设计创作，主要内容包括：本申请涉及一种预应力锚杆及其施工方法,预应力锚杆包括内部中空的杆体,杆体内转动安装有转动杆,杆体外壁上开设有安装槽,转动杆上设有两段旋向相反的螺纹,转动杆上设置有加固组件,加固组件包括与转动杆的一段螺纹螺纹连接的第一连接杆、与转动杆的另一段螺纹螺纹连接的第二连接杆以及安装于安装槽内的弧形加固板,弧形加固板两端分别与第一连接杆和第二连接杆固定,转动杆上设置有防止弧形加固板朝转动杆一侧弯曲的抵触组件。本申请中,当工作人员将锚杆钉入待加固岩层中后,工作人员需转动转动杆,使得第二连接杆与第一连接杆相互靠近,在抵触组件的作用下,弧形加固板朝远离转动杆的一侧弯曲,以此增强了锚杆与待加固岩层之间的预应力。(The application relates to a prestressed anchor rod and a construction method thereof, the prestressed anchor rod comprises a hollow rod body, a rotating rod is installed in the rod body in a rotating mode, a mounting groove is formed in the outer wall of the rod body, two threads with opposite rotating directions are arranged on the rotating rod, a reinforcing assembly is arranged on the rotating rod, the reinforcing assembly comprises a first connecting rod connected with one section of the rotating rod through threads, a second connecting rod connected with the other section of the rotating rod through threads and an arc reinforcing plate installed in the mounting groove, two ends of the arc reinforcing plate are fixed with the first connecting rod and the second connecting rod respectively, and a conflict assembly for preventing the arc reinforcing plate from bending towards one side of the rotating rod is arranged on the. In this application, after in the staff nailed the stock into treating the reinforcement stratum, the staff need rotate the dwang for second connecting rod and head rod are close to each other, and under the effect of subassembly of contradicting, arc gusset plate is towards keeping away from the one side bending of dwang, with this strengthened the stock and treat the prestressing force of consolidating between the stratum.)

1. The utility model provides a prestressed anchorage pole, includes inside hollow body of rod (1), the one end of the body of rod (1) is most advanced, dwang (2) are installed to body of rod (1) internal rotation, the axis of dwang (2) and the axis coincidence of the body of rod (1), its characterized in that: offer on the body of rod (1) outer wall with mounting groove (12) of the inside intercommunication of the body of rod (1), be equipped with two sections screw threads opposite to soon on dwang (2) and the position that mounting groove (12) correspond, be provided with on dwang (2) and consolidate subassembly (3), consolidate subassembly (3) including head rod (31) with one section screw thread threaded connection of dwang (2), with second connecting rod (32) of another section screw thread threaded connection of dwang (2) and install arc gusset plate (33) in mounting groove (12), the both ends of arc gusset plate (33) are fixed with head rod (31) and second connecting rod (32) respectively, be provided with on dwang (2) and prevent arc gusset plate (33) towards conflict subassembly (4) of dwang (2) one side bending.

2. The prestressed anchor as claimed in claim 1, wherein: conflict subassembly (4) include with the body of rod (1) inner wall fixed limiting plate (41), two sections screw threads on dwang (2) set up about limiting plate (41) symmetry, just dwang (2) run through limiting plate (41) and with limiting plate (41) clearance fit.

3. The prestressed anchor as claimed in claim 2, wherein: limiting plate (41) lateral wall has seted up mounting hole (411) on the position that corresponds with mounting groove (12), conflict subassembly (4) include with mounting hole (411) be close to spring (42) that the lateral wall of dwang (2) one side is fixed and set up the pole (43) that connects of keeping away from the one end of dwang (2) with spring (42).

4. The prestressed anchor as claimed in claim 1, wherein: the one end that its point portion was kept away from in the body of rod (1) is fixed with baffle (11), be provided with mounting panel (111) on baffle (11), be provided with on mounting panel (111) and order about dwang (2) pivoted drive assembly (5), drive assembly (5) including be fixed in battery (51) on mounting panel (111), be fixed in on mounting panel (111) and with battery (51) electric connection's motor (52), fixed cover locate motor (52) output epaxial driving gear (53) and cover locate dwang (2) on and with driving gear (53) meshed driven gear (54), install on driven gear (54) and be used for fixed subassembly (6) with driven gear (54) and dwang (2).

5. The prestressed anchor as claimed in claim 4, wherein: run through on mounting panel (111) be provided with baffle (11) threaded connection's first bolt (1111), fixed subassembly (6) including the cover locate dwang (2) on and with driven gear (54) fixed sleeve pipe (61) and run through set up on sleeve pipe (61) and with dwang (2) threaded connection's second bolt (62).

6. The prestressed anchor as claimed in claim 4, wherein: arc gusset plate (33) are close to arc on the surface of dwang (2) one side and are fixed with slip casting pipe (7), all set up the perforation that supplies slip casting pipe (7) to pass on baffle (11) and mounting panel (111), just slip casting hole (71) have been seted up in running through on slip casting pipe (7) of arc gusset plate (33) department.

7. A construction method of a prestressed anchor rod is characterized by comprising the following steps:

(1) the tip end of the rod body (1) faces towards a rock stratum to be reinforced, and the main body part of the rod body (1) is driven into the rock stratum to be reinforced until the surface of the baffle (11) close to one side of the tip end of the rod body (1) is attached to the surface of the rock stratum to be reinforced;

(2) the motor (52) is started, so that the driving gear (53), the driven gear (54) and the rotating rod (2) rotate, the first connecting rod (31) and the second connecting rod (32) are close to each other, and under the action of the abutting rod (43), the arc-shaped reinforcing plate (33) bends towards one side far away from the rotating rod (2) so as to enhance the prestress between the rod body (1) and the rock stratum to be reinforced;

(3) and injecting concrete mortar into the grouting pipe (7), so that the concrete mortar flows out of the grouting holes (71), and the concrete mortar is solidified around the rock stratum to be reinforced at the bent part of the arc-shaped reinforcing plate (33) to further strengthen the prestress between the rod body (1) and the rock stratum to be reinforced.

8. The method as claimed in claim 7, further comprising the steps of: and unscrewing the first bolt (1111) and detaching the driven gear (54), simultaneously unscrewing the second bolt (62) and detaching the mounting plate (111), then cutting off the rotating rod (2) on the side of the mounting plate (111) far away from the rod body (1), and pouring concrete at the intersection between the rotating rod (2) and the baffle plate (11).

Technical Field

The application relates to the technical field of anchor rods, in particular to a prestressed anchor rod and a construction method thereof.

Background

The side slope of the highway can keep the strength and stability of the roadbed of the highway, reduce the emergence of roadbed disease of the highway, in order to reduce the soil erosion of the side slope of the highway, generally insert and establish the prestressed anchor on the slope protection plate of the side slope in the related art, the prestressed anchor tip is buried in the soil horizon of the side slope, thus strengthen the slope protection function of the slope protection plate.

Chinese patent No. CN2425197 discloses a prestressed anchor rod, which comprises a rod body, a tray, and a tapered wedge, wherein a tapered hole is formed in the center of the tray, and inner holes of the tapered wedge are provided with sawtooth-shaped inverted teeth. In use, the shank of the pre-stressed anchor is inserted into the rock formation to be reinforced.

With respect to the related art among the above, the inventors consider that the following drawbacks exist: the body of rod is cylindric structure, and the body of rod is relatively poor with the prestressing force effect of treating between the reinforcement stratum, and when the body of rod received the exogenic action, the body of rod and treat that the connection between the reinforcement stratum takes place easily not hard up.

Disclosure of Invention

In order to strengthen the prestress between the rod body and the rock stratum to be reinforced and improve the connection between the rod body and the rock stratum to be reinforced, one of the purposes of the application is to provide the prestressed anchor rod.

The application provides a prestressed anchorage adopts following technical scheme:

the utility model provides a prestressed anchor pole, includes the inside hollow body of rod, the one end of the body of rod is most advanced, the dwang is installed to the body of rod internal rotation, the axis of dwang and the axis coincidence of the body of rod, set up the mounting groove with the inside intercommunication of the body of rod on the body of rod outer wall, be equipped with two sections on the position that dwang and mounting groove correspond and revolve to opposite screw thread, be provided with on the dwang and consolidate the subassembly, consolidate the subassembly include with one section threaded connection's of dwang head rod, with another section threaded connection's of dwang second connecting rod and install the arc gusset plate in the mounting groove, the both ends of arc gusset plate are fixed with head rod and second connecting rod respectively, be provided with on the dwang and prevent arc gusset plate towards the crooked conflict subassembly in.

Through adopting above-mentioned technical scheme, after the staff nailed the prestressed anchorage pole and treats the reinforcement stratum in, the staff only need rotate the dwang, make second connecting rod and head rod be close to each other, under the effect of conflict subassembly, the one side bending of dwang is kept away from to arc gusset plate orientation, support tightly between this makes the arc gusset plate keep away from the arc surface of dwang one side and treating the reinforcement stratum, thereby strengthened the body of rod and treat the prestressing force of consolidating between the stratum, the body of rod and treat the linkage effect of consolidating between the stratum have been promoted.

Optionally, the conflict subassembly includes the limiting plate fixed with the body of rod inner wall, two sections screw threads on the dwang set up about the limiting plate symmetry, just the dwang runs through the limiting plate and with limiting plate clearance fit.

Through adopting above-mentioned technical scheme, when the staff rotated the dwang, be located the first connecting rod on two sections screw threads of dwang respectively and be close to each other with the second connecting rod, at this in-process, the limiting plate had played good limiting displacement to the arc gusset plate to this has reduced the crooked probability of arc gusset plate towards dwang one side emergence.

Optionally, the limiting plate lateral wall has seted up the mounting hole with the position that the mounting groove corresponds on, the subassembly of contradicting includes and is close to the fixed spring of lateral wall on one side of the dwang with the mounting hole and keeps away from the one end of dwang with the spring and fix and set up the butt pole in the mounting hole.

Through adopting above-mentioned technical scheme, rotate the dwang at the staff to make the in-process that head rod and second connecting rod are close to each other, under the spring action of spring, the one end that the dwang was kept away from to the butt pole supports tightly with the surface that the arc gusset plate is close to dwang one side, thereby the arc gusset plate of being convenient for is towards keeping away from the one side bending of dwang, is favorable to the reinforcing body of rod and treats the prestressing force of consolidating between the stratum.

Optionally, the one end that its point portion was kept away from to the body of rod is fixed with the baffle, be provided with the mounting panel on the baffle, be provided with on the mounting panel and order about dwang pivoted drive assembly, drive assembly including be fixed in on the mounting panel the battery, be fixed in on the mounting panel and locate on the dwang with battery electric connection's motor, fixed cover driving gear and cover and locate the dwang and with driving gear engaged driven gear, the last fixed subassembly that is used for fixing driven gear and dwang of installing of driven gear.

Through adopting above-mentioned technical scheme, under fixed subassembly's effect to this has played good fixed action to driven gear and dwang. For reducing the degree of difficulty that the staff rotated the dwang, the staff only needed to open the motor, and the motor work back drives the driving gear and rotates to this makes driven gear with driving gear meshing and all rotates with the dwang that driven gear is fixed, thereby has reduced the degree of difficulty that the staff rotated the dwang.

Optionally, run through on the mounting panel be provided with baffle threaded connection's first bolt, fixed subassembly including the cover locate the dwang on and with driven gear fixed sleeve pipe and run through set up on the sleeve pipe and with dwang threaded connection's second bolt.

Through adopting above-mentioned technical scheme, order about the dwang through drive assembly when the staff and rotate to this makes arc gusset plate towards the crooked back in one side of keeping away from the dwang, and the staff need unscrew first bolt and second bolt, thereby is convenient for the staff to dismantle driven gear and mounting panel, so that the staff goes in being applied to the installation of other bodies of rod with drive assembly, is favorable to practicing thrift construction cost.

Optionally, the arc that the arc gusset plate is close to dwang one side is fixed with the slip casting pipe on the surface, all set up the perforation that supplies the slip casting pipe to pass on baffle and the mounting panel, just run through on the slip casting pipe of arc gusset plate department and seted up the slip casting hole.

Through adopting above-mentioned technical scheme, take place crooked back when the arc gusset plate, for reinforcing the arc gusset plate and treat the joint action between the reinforcement stratum, the staff need pass through the slip casting pipe slip casting to this makes concrete mortar flow from the slip casting hole, and afterwards, concrete mortar that flows out from the slip casting hole solidifies in arc gusset plate department, has further strengthened the arc gusset plate and has treated the joint action between the reinforcement stratum.

The second purpose of the invention is to provide a construction method of a prestressed anchor rod, which comprises the following steps:

(1) the tip of the rod body faces towards the rock stratum to be reinforced, and the main body part of the rod body is driven into the rock stratum to be reinforced until the surface of the baffle, close to the tip of the rod body, is attached to the surface of the rock stratum to be reinforced;

(2) the motor is started, so that the driving gear, the driven gear and the rotating rod rotate, the first connecting rod and the second connecting rod are close to each other, and under the action of the abutting rods, the arc-shaped reinforcing plate bends towards one side far away from the rotating rod, so that the prestress between the rod body and the rock stratum to be reinforced is enhanced;

(3) and injecting concrete mortar into the grouting pipe, so that the concrete mortar flows out of the grouting hole, the concrete mortar is solidified around the rock stratum to be reinforced at the bent part of the arc-shaped reinforcing plate, and the prestress between the rod body and the rock stratum to be reinforced is further enhanced.

Through adopting above-mentioned technical scheme, order about the dwang through drive assembly when the staff and rotate to make head rod and second connecting rod be close to the back each other, arc gusset plate orientation is kept away from one side bending of dwang, with this make the arc gusset plate keep away from the surface of dwang one side and wait to consolidate and support tightly between the stratum, thereby strengthened the strong body of rod and wait to consolidate the prestressing force between the stratum. The concrete mortar injected by the grouting pipe flows out of the grouting hole, and after the concrete mortar is solidified around the rock stratum to be reinforced at the bent part of the arc-shaped reinforcing plate, the prestress between the rod body and the rock stratum to be reinforced is enhanced.

Optionally, the construction method of the prestressed anchor rod further includes the following steps: the first bolt is unscrewed and the driven gear is dismantled, the second bolt is unscrewed simultaneously and the mounting panel is dismantled, and the dwang of keeping away from body of rod one side with the mounting panel is cut afterwards, and the crossing department between dwang and baffle pouring concrete.

Through adopting above-mentioned technical scheme, the concrete that pours after solidifying in the crossing department between dwang and baffle for the connection effect between dwang and the baffle is more firm, has avoided the dwang to receive the exogenic action to rotate, and makes the position of arc gusset plate take place not hard up the condition.

In summary, the present application includes at least one of the following beneficial technical effects:

in the application, after the anchor rod is driven into the rock stratum to be reinforced by a worker, the worker needs to rotate the rotating rod, so that the second connecting rod and the first connecting rod are close to each other, and under the action of the abutting component, the arc-shaped reinforcing plate is bent towards one side far away from the rotating rod, so that the prestress between the anchor rod and the rock stratum to be reinforced is enhanced;

in the process that the rotating rod is rotated by a worker and the first connecting rod and the second connecting rod are close to each other, the probability that the arc-shaped reinforcing plate bends towards one side of the rotating rod is reduced under the matching action of the spring and the abutting rod;

this application is for reducing the degree of difficulty that the staff rotated the dwang, and the staff only need open the motor, and the motor work back drives the driving gear and rotates to this makes driving gear, driven gear and dwang all rotate, thereby is convenient for the second connecting rod and the head rod be close to each other, so that the one side bending of dwang is kept away from to arc gusset plate orientation.

Drawings

FIG. 1 is a schematic view of the prestressed anchor of the embodiment of the present application, when not in use.

FIG. 2 is a schematic structural view of the prestressed anchor of the embodiment.

FIG. 3 is a schematic view of an embodiment of the present invention for highlighting the internal structure of the stick body.

Description of reference numerals: 1. a rod body; 11. a baffle plate; 111. mounting a plate; 1111. a first bolt; 12. mounting grooves; 2. rotating the rod; 3. a reinforcement assembly; 31. a first connecting rod; 32. a second connecting rod; 33. an arc-shaped reinforcing plate; 4. a collision component; 41. a limiting plate; 411. mounting holes; 42. a spring; 43. a butting rod; 5. a drive assembly; 51. a storage battery; 52. a motor; 53. a driving gear; 54. a driven gear; 6. a fixing assembly; 61. a sleeve; 62. a second bolt; 7. a grouting pipe; 71. and (4) grouting holes.

Detailed Description

The present application is described in further detail below with reference to figures 1-3.

The embodiment of the application discloses a prestressed anchor rod and a construction method thereof. Referring to fig. 1 and 2, the prestressed anchor includes a rod body 1, a baffle 11, a rotating rod 2, a reinforcing member 3, a collision member 4, a mounting plate 111, and a driving member 5. The body of rod 1 is inside hollow cylindric structure, and its one end is most advanced, the other end opening of the body of rod 1, and set up on the 1 outer wall of the body of rod with the mounting groove 12 of the 1 inside intercommunication of the body of rod, in this embodiment, the quantity of mounting groove 12 is four and evenly distributed all around in the body of rod 1. The baffle 11 is a disc-shaped structure, the axis of the baffle is overlapped with the axis of the rod body 1, and the surface of one side of the baffle 11 close to the tip of the rod body 1 is fixed with one end of the rod body 1 far away from the tip of the rod body 1. Dwang 2 is round rod-shaped structure, and its axis coincides with the axis of the body of rod 1, and dwang 2 rotates and installs in the body of rod 1, and the one end that body of rod 1 pointed portion was kept away from to dwang 2 runs through baffle 11 and is connected with baffle 11 rotation, is provided with two sections screws on dwang 2 and the position that mounting groove 12 corresponds, and the pitch of two sections screws equals, revolves to opposite.

Referring to fig. 2, the reinforcing member 3 is disposed on the rotating rod 2 and is used for reinforcing the connection between the rod body 1 and the rock strata to be reinforced, and as shown in fig. 3, the reinforcing member 3 includes a first connecting rod 31, a second connecting rod 32 and an arc-shaped reinforcing plate 33. The first connecting rod 31 is a cross-shaped rod structure, the cross section of the first connecting rod is rectangular, the first connecting rod 31 is sleeved on one section of the thread of the rotating rod 2 and is in threaded connection with the rotating rod 2, and one end of the first connecting rod 31, which is far away from the axis of the rotating rod 2, extends into the mounting groove 12. The second connecting rod 32 is also a cross-shaped rod structure, the cross section of the second connecting rod is rectangular, the second connecting rod 32 is sleeved on the other section of the screw thread of the rotating rod 2 and is connected with the screw thread of the rotating rod 2, and one end of the second connecting rod 32 far away from the axis of the rotating rod 2 also extends into the mounting groove 12. The arc gusset plate 33 is arc platy structure, and its quantity is four, and four arc gusset plates 33 are installed respectively in four mounting grooves 12, and the internal surface of arc gusset plate 33 one end is fixed with the one end that dwang 2 was kept away from to head rod 31, and the internal surface of arc gusset plate 33 other end is fixed with the one end that dwang 2 was kept away from to second connecting rod 32.

Referring to fig. 2, the interference assembly 4 is disposed on the rotating rod 2 for preventing the arc-shaped reinforcing plate 33 from being bent toward one side of the rotating rod 2, and as shown in fig. 3, the interference assembly 4 includes a limiting plate 41, a spring 42 and an abutting rod 43. The limiting plate 41 is of a disc-shaped structure, the axis of the limiting plate 41 coincides with the axis of the rod body 1, the side wall of the limiting plate 41 is attached to and fixed with the inner wall of the rod body 1, the two sections of threads on the rotating rod 2 are symmetrically arranged relative to the limiting plate 41, and the rotating rod 2 penetrates through the limiting plate 41 and is in clearance fit with the limiting plate 41. The side wall of the limiting plate 41 is provided with mounting holes 411, the cross section of each mounting hole 411 is rectangular, the number of the mounting holes 411 is four, and the positions of the four mounting holes 411 correspond to the positions of the four mounting grooves 12 respectively. The number of the springs 42 is four, the four springs 42 are respectively disposed in the four mounting holes 411, and one end of each spring 42 is fixed to the side wall of the mounting hole 411 close to one side of the rotating rod 2. The abutting rods 43 are of a square rod-shaped structure, the number of the abutting rods 43 is four, the four abutting rods 43 are respectively arranged in the four mounting holes 411, and one end of each abutting rod 43 close to the rotating rod 2 is fixed to one end of each spring 42 far away from the rotating rod 2. In-process of treating the reinforcement stratum is squeezed into with the body of rod 1 to the staff, spring 42 plays the spring force effect to make butt rod 43 one end with prevent that arc gusset plate 33 is close to the arc surface butt of dwang 2 one side, with this arc gusset plate 33 has played good conflict effect, has reduced the crooked probability in arc gusset plate 33 orientation dwang 2 one side.

Referring to fig. 1, the mounting plate 111 is a disc-shaped structure and is disposed on a side of the baffle plate 11 away from the rod body 1, the rotating rod 2 penetrates through the mounting plate 111 and is rotatably connected with the mounting plate 111, a first bolt 1111 in clearance fit with the mounting plate 111 is penetratingly disposed on the mounting plate 111, and the first bolt 1111 is in threaded connection with the baffle plate 11, so that a worker can detachably mount the mounting plate 111 on the baffle plate 11.

Referring to fig. 1, the driving assembly 5 is disposed on the mounting plate 111 for driving the rotating rod 2 to rotate, and the driving assembly 5 includes a battery 51, a motor 52, a driving gear 53 and a driven gear 54. The battery 51 and the motor 52 are fixed on the surface of the mounting plate 111 on the side away from the rod body 1, the motor 52 is electrically connected with the battery 51, and the axis of the output shaft of the motor 52 is parallel to the axis of the rod body 1. The axis of the driving gear 53 coincides with the axis of the output shaft of the motor 52, and the driving gear 53 is sleeved on the output shaft of the motor 52 and fixed with the output shaft of the motor 52. The axis of driven gear 54 coincides with the axis of dwang 2, and its cover is located the dwang 2 and with dwang 2 clearance fit, driven gear 54 and driving gear 53 meshing, and be provided with on the driven gear 54 and be used for the fixed subassembly 6 of driven gear 54 with dwang 2.

Referring to fig. 1, the fixing assembly 6 includes a sleeve 61 and a second bolt 62, the sleeve 61 has a circular tubular structure, an axis of the sleeve 61 coincides with an axis of the rotating rod 2, the sleeve 61 is in clearance fit with the rotating rod 2, and an upper end surface of the sleeve 61 is fixed to a bottom surface of the driven gear 54. The axis of the second bolt 62 is perpendicular to and intersects with the axis of the sleeve 61, and is arranged on the sleeve 61 in a penetrating manner and is in clearance fit with the sleeve 61, and the second bolt 62 is in threaded connection with the rotating rod 2, so that a worker can conveniently tighten the second bolt 62 and fix the driven gear 54 with the rotating rod 2. Referring to fig. 3, when a worker nails the rod body 1 into a rock formation to be consolidated and the surface of the baffle 11 close to the tip end of the rod body 1 is attached to the surface of the rock formation to be consolidated, the worker needs to turn on the motor 52, and the motor 52 drives the driving gear 53 to rotate after working, so that the driven gear 54 engaged with the driving gear 53 and the rotating rod 2 fixed to the driven gear 54 rotate, because the first connecting rod 31 and the second connecting rod 32 are respectively connected with the two sections of the rotating rod 2 with opposite rotation directions of the threads, the first connecting rod 31 and the second connecting rod 32 are close to each other, and under the cooperation of the first connecting rod 31 and the second connecting rod 32, the arc-shaped reinforcing plate 33 is bent towards the side away from the rotating rod 2, so that the outer surface of the arc-shaped reinforcing plate 33 is tightly attached to the rock formation to be consolidated, the stability of being connected between the body of rod 1 and the rock stratum of treating the reinforcement has been strengthened.

Referring to fig. 3, the grouting pipe 7 is fixed on the arc surface of the arc reinforcing plate 33 close to one side of the rotating rod 2, a plurality of grouting holes 71 are formed through the grouting pipe 7 at the arc reinforcing plate 33, the main body of the grouting pipe 7 is located in the rod body 1, and through holes (not shown in the figure) for the grouting pipe 7 to pass through are formed in the baffle plate 11 and the mounting plate 111. In order to enhance the connection between the arc-shaped reinforcing plate 33 and the rock strata to be reinforced, the worker only needs to inject concrete mortar through the grouting pipe 7, the concrete mortar flows out from the grouting holes 71, and then the mortar is solidified around the arc-shaped reinforcing plate 33, thereby enhancing the connection between the arc-shaped reinforcing plate 33 and the rock strata to be reinforced.

Referring to fig. 2 and 3, the construction method of the prestressed anchor includes the following steps:

(1) the tip of the rod body 1 faces to a rock stratum to be reinforced, and the main body part of the rod body 1 is driven into the rock stratum to be reinforced until the surface of the baffle 11, close to the tip of the rod body 1, is attached to the surface of the rock stratum to be reinforced;

(2) the motor 52 is started, so that the driving gear 53, the driven gear 54 and the rotating rod 2 all rotate, the first connecting rod 31 and the second connecting rod 32 are close to each other, and under the action of the abutting rod 43, the arc-shaped reinforcing plate 33 bends towards the side far away from the rotating rod 2, so that the prestress between the rod body 1 and the rock stratum to be reinforced is enhanced;

(3) injecting concrete mortar into the grouting pipe 7, so that the concrete mortar flows out of the grouting holes 71, and the concrete mortar is solidified around the rock stratum to be reinforced at the bending part of the arc-shaped reinforcing plate 33, so as to further enhance the prestress between the rod body 1 and the rock stratum to be reinforced;

(4) the first bolt 1111 is unscrewed and the driven gear 54 is removed, and simultaneously the second bolt 62 is unscrewed and the mounting plate 111 is removed, and then the rotating rod 2 of the mounting plate 111 on the side away from the rod body 1 is cut off and concrete is poured at the intersection between the rotating rod 2 and the baffle plate 11.

Referring to fig. 3, when the worker removes the driven gear 54 and the mounting plate 111, the surplus rotating rod 2 is cut off, and after concrete is poured at the intersection between the rotating rod 2 and the baffle plate 11, the concrete is solidified at the intersection between the rotating rod 2 and the baffle plate 11, so that the free rotation of the rotating rod 2 is well limited, and the condition that the connection stability between the arc-shaped reinforcing plate 33 and the rock stratum to be reinforced is affected due to the rotation of the rotating rod 2 is avoided.

The implementation principle of the prestressed anchor rod and the construction method thereof in the embodiment of the application is as follows: when the reinforcing structure is used, a worker firstly needs to enable the tip end of the rod body 1 to face a rock stratum to be reinforced, and drives the main body part of the rod body 1 into the rock stratum to be reinforced until the surface of the baffle plate 11, close to the tip end of the rod body 1, is attached to the surface of the rock stratum to be reinforced; subsequently, the staff need open motor 52, motor 52 drives driving gear 53 after the work and rotates, so that driven gear 54 with driving gear 53 meshing and the dwang 2 of fixing with driven gear 54 all rotate, thereby make head rod 31 and second connecting rod 32 be close to each other, under the mating reaction of head rod 31 and second connecting rod 32, arc gusset plate 33 is towards the one side bending of keeping away from dwang 2, so that support tightly between arc gusset plate 33 surface and the rock stratum of treating to consolidate, the stability of being connected between the body of rod 1 and the rock stratum of treating to consolidate has been strengthened.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.