Filling equipment and technology for FRP anchor rod

Abstract

The invention relates to the technical field of cement-containing material forming, and particularly discloses filling equipment and a filling process of an FRP anchor rod. The filling equipment of the FRP anchor rod comprises a clamping assembly and an anchor head, the outer side of the anchor head is fixedly connected with one end of a hose body, an ejector rod and a grouting pipe are arranged in the hose body, and the clamping assembly is fixedly connected with the outer side of the anchor head. One end of the ejector rod extends out of the hose body, one end of the grouting pipe extends out of the hose body, a supporting frame is fixed to the clamping assembly, and a jacking assembly is arranged on the supporting frame. According to the filling equipment for the FRP anchor rod, wall protection slurry and slurry are prevented from being mixed in an anchor hole, so that the situation that the water-cement ratio of the slurry is imbalance is avoided, and the grouting efficiency is improved; the interface bonding strength between the FRP anchor rod and the grouting body is guaranteed, the bearing capacity of an anchoring system is guaranteed, and the FRP anchor rod pouring process is easy to operate and easy to popularize.

Description

Technical Field

[0001] The present invention relates to the technical field of mining machinery and equipment, in particular to the technical field of cement-containing material molding, and specifically to a pouring device and a pouring process for an FRP anchor rod. Background Art

[0002] Anchor grouting technology is widely used in mines, tunnels and underground projects. Its core function is to form an overall structure of anchor-grouting body-surrounding rock through the composite effect of anchor and grouting material, thereby improving the stability of the rock mass, effectively controlling the deformation of the surrounding rock and preventing the loosening and spalling of the rock strata.

[0003] FRP (fiber reinforced plastic) anchor rods are increasingly used in support due to their advantages such as light weight and strong corrosion resistance. In FRP anchor rod grouting, in order to prevent borehole collapse and ensure the quality of grouting, wall protection mud is usually injected during the drilling process. After the drilling is completed, grouting liquid is poured and FRP anchor rods are inserted. However, existing grouting equipment is difficult to achieve effective separation of wall protection mud and slurry, resulting in the inevitable mixing of wall protection mud and slurry in the anchor hole. The wall protection mud dilutes the slurry, resulting in an imbalance in the water-cement ratio, and ultimately leading to a decrease in the slurry consolidation strength. The interface bonding strength between the FRP anchor rod and the grouting body is difficult to ensure, resulting in insufficient bearing capacity of the anchoring system. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the existing defects and provide a grouting equipment and grouting process for FRP anchor rods. The grouting equipment for FRP anchor rods prevents the mixing of wall protection mud and slurry in the anchor hole, thereby avoiding the imbalance of the slurry water-cement ratio, ensuring the interface bonding strength between the FRP anchor rod and the grouting body, and ensuring the bearing capacity of the anchoring system. The FRP anchor rod grouting process is simple to operate and easy to promote.

[0005] The technical solutions adopted by the present invention to solve the technical problems include: On the one hand, a grouting equipment for FRP anchor rod is provided, including a clamping assembly and an anchor head, the outer side of the anchor head is fixedly connected to one end of a hose body, a push rod and a grouting pipe are provided inside the hose body, one end of the push rod extends outside the hose body, and one end of the grouting pipe extends outside the hose body.

[0006] A support frame is fixed on the clamping assembly, and a jacking assembly is provided on the support frame.

[0007] In which, an FRP anchor rod is provided in the flexible pipe body, the anchor head and one end of the FRP anchor rod are fixedly connected, the length of the FRP anchor rod is less than the length of the top rod, and the FRP anchor rod is provided with a through hole arranged parallel to its length, the top rod passes through the through hole, and a number of restraints are fixed on the outside of the flexible pipe body to wrap the flexible pipe body around the FRP anchor rod.

[0008] The clamping assembly is installed on the outside of the FRP anchor rod and away from the anchor head, and the lifting assembly is against the end of the jack rod away from the anchor head.

[0009] As a preferred technical solution of the present invention, it also includes a connecting piece and a blocking piece. The top rod is provided with a slurry hole parallel to its length direction, and the outer side of the FRP anchor rod is provided with a plurality of openings connected to the slurry holes at equal intervals along its length direction. A detachable blocking piece is installed on each opening. One end of the top rod is connected to the blocking piece by a connecting piece, and the distance between the top rod and the blocking piece is less than the distance between two adjacent openings.

[0010] The push rod drives the blocking piece into the through hole of the FRP anchor rod, and there is a gap between the blocking piece and the inner wall of the through hole of the FRP anchor rod, and the outer side of the push rod and the through hole of the FRP anchor rod are slidably fitted.

[0011] As a preferred technical solution of the present invention, an annular tube is provided on the outside of the flexible pipe body, and no less than three water spray holes are provided on the outside of the annular tube corresponding to the position of the anchor head, and no less than three elastic rods are fixed at equal angles on the outside of the annular tube corresponding to the position of the anchor head, and the inner cavity of the annular tube is connected to one end of the catheter.

[0012] As a preferred technical solution of the present invention, the blocking member is spherical or conical.

[0013] As a preferred technical solution of the present invention, a spiral steel bar is sleeved on the outside of the FRP anchor rod, and the steel bar is located in the hose body, and a spiral protrusion is provided on the outside of the FRP anchor rod.

[0014] As a preferred technical solution of the present invention, the clamping assembly includes two clamping plates arranged opposite to each other, elastic blocks are fixed on the inner sides of the two clamping plates, and the two clamping plates are connected by a positioning piece.

[0015] As a preferred technical solution of the present invention, the jacking component is a rack jack, a screw jack, a hydraulic cylinder or a pneumatic cylinder, and the hose body is made of soft plastic material or a woven bag material.

[0016] On the other hand, a FRP anchor pouring process is also provided, using any of the aforementioned FRP anchor pouring equipment, comprising the following steps: The drilling points are located on the construction surface, and anchor holes are drilled on the construction surface.

[0017] The anchor head is fixedly connected to one end of the FRP anchor rod, the clamping assembly is installed on the outside of the FRP anchor rod away from the anchor head, the push rod is inserted into the through hole of the FRP anchor rod, the restraint wraps the hose body on the FRP anchor rod, the FRP anchor rod drives the anchor head to be inserted into the anchor hole, and the lifting assembly is against the end of the push rod away from the anchor head.

[0018] The jacking assembly pushes the jack to move toward the anchor head, and the extrusion force between the jack and the jacking assembly reaches a set range value.

[0019] The external grouting equipment injects slurry into the bottom of the inner cavity of the hose body through the grouting pipe. The slurry continuously injected into the hose body causes the restraining parts on the hose body to break one by one. The grouting is stopped when the slurry in the hose body reaches the set liquid level. The slurry is resin slurry, cement slurry or cement mortar.

[0020] After the strength of the grouting body formed by the solidification of the slurry in the hose reaches 3.0MPa-5.0MPa, the top rod and the clamping assembly on the FRP anchor are removed.

[0021] As a preferred technical solution of the present invention, the following steps are included: After the strength of the grouting body in the hose body reaches 4.0 MPa-5.5 MPa, the push rod drives the blocking piece to enter the through hole of the FRP anchor rod.

[0022] An external high-pressure grouting pump injects a set volume of slurry into the through hole on the FRP anchor rod through the push rod, and the slurry in the through hole pushes open a plugging piece of the opening, and causes the grouting body and the hose body at the opening to break. Then the push rod moves outside the through hole of the FRP anchor rod by the distance between two adjacent openings, and the above operation is repeated.

[0023] As a preferred technical solution of the present invention, the following steps are included: During the process of injecting slurry into the inner cavity of the flexible pipe body, the external liquid pump pumps the wall protection slurry into the annular pipe through the guide tube.

[0024] Compared with the prior art, the present invention has the following beneficial effects: 1. The grouting equipment of the FRP anchor rod in the example of the present invention, on the one hand, the slurry in the hose body first fills the bottom of the inner cavity of the hose body, and the hose body is attached to the inner wall of the anchor hole, thereby preventing the wall protection mud and the slurry from mixing in the anchor hole, thereby avoiding the imbalance of the slurry water-cement ratio, ensuring the interface bonding strength between the FRP anchor rod and the grouting body, and ensuring the bearing capacity of the anchoring system; on the other hand, the slurry flowing out of the opening forms an extended bulge after solidification in the stratum, thereby enhancing the anchoring force of the FRP anchor rod, and the amount of slurry used is small, reducing the construction cost of FRP anchor rod anchoring; on the other hand, the expansion area of ​​the hose body pushes the annular tube toward the orifice of the anchor hole through the elastic rod, so that the wall protection mud sprayed from the water spray hole cleans the bentonite deposited on the outside of the hose body, thereby avoiding the necking of the grouting body on the FRP anchor rod.

[0025] 2. The pouring equipment of the FRP anchor rod in the example of the present invention, the jacking assembly, the jack rod, the clamping assembly and the anchor head cooperate to put the FRP anchor rod in a tensioned state during the slurry consolidation process. The pre-tensioning force can offset part of the relaxation in advance and allow the FRP anchor rod to participate in the stress earlier, thereby reducing the support pressure when the load suddenly increases in the later stage.

[0026] 3. The FRP anchor grouting process of the present invention avoids mixing of the wall protection mud and the slurry in the anchor hole, thereby avoiding imbalance of the slurry water-cement ratio, ensuring the interface bonding strength between the FRP anchor and the grouting body, and ensuring the bearing capacity of the anchoring system. In addition, the FRP anchor grouting process is simple to operate and easy to promote. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic structural diagram of an embodiment of the present invention; Figure 2 for Figure 1 A schematic diagram of a partial cross-sectional structure; Figure 3 This is a schematic diagram of the structure of the present invention in use; Figure 4 for Figure 3 A magnified schematic diagram of the structure at A; Figure 5 It is a schematic structural diagram of the clamping assembly of the present invention; Figure 6 It is a schematic diagram of the structure of the ejector rod and the blocking member of the present invention; Figure 7 It is a schematic diagram of the annular tube structure of the present invention.

[0028] In the figure: 1 jacking assembly, 2 support frame, 3 jack rod, 4 clamping assembly, 41 clamping plate, 42 positioning member, 43 elastic block, 5 grouting pipe, 6 conduit, 7 hose body, 8 restraining member, 9 annular pipe, 10 elastic rod, 11 anchor head, 12 steel bar, 13 FRP anchor rod, 14 spray hole, 15 opening, 16 blocking member, 17 connecting member, 18 blocking member. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0030] Example 1: See also Figures 1-6 This embodiment discloses a pouring equipment for an FRP anchor, including a clamping assembly 4 and an anchor head 11. The outer side of the anchor head 11 is bonded to one end of a hose body 7 or connected by a clamp. The tip of the anchor head 11 is away from the hose body 7. A push rod 3 and a grouting pipe 5 are provided in the hose body 7. One end of the push rod 3 extends to the outside of the hose body 7, and one end of the grouting pipe 5 extends to the outside of the hose body 7.

[0031] A support frame 2 is fixed on the clamping assembly 4 , a jacking assembly 1 is provided on the support frame 2 , and the support frame 2 provides a supporting plane for the jacking assembly 1 .

[0032] Among them, an FRP anchor rod 13 is provided in the hose body 7, and the anchor head 11 and one end of the FRP anchor rod 13 are bonded, clamped or threaded. The length of the FRP anchor rod 13 is less than the length of the push rod 3, and the length of the hose body 7 is less than the length of the FRP anchor rod 13. A through hole is provided on the FRP anchor rod 13 parallel to its length, and the push rod 3 passes through the through hole. Several restraints 8 are fixed on the outside of the hose body 7 to wrap the hose body 7 around the FRP anchor rod 13.

[0033] The clamping assembly 4 is installed outside the FRP anchor rod 13 at a position away from the anchor head 11 , and the lifting assembly 1 is against an end of the jack rod 3 away from the anchor head 11 .

[0034] Furthermore, the jacking component 1 is a rack jack, a screw jack, a ball screw, a hydraulic cylinder or a pneumatic cylinder, the hose body 7 is made of soft plastic or a woven bag, the restraining part 8 is a tape, a hemp rope or a plant fiber thread, and the diameter of the through hole is 50mm-150mm.

[0035] The jacking assembly 1 used in the present invention is a common device in the prior art, and its working method and structure are well-known technologies and will not be described in detail here.

[0036] The working process and principle of this embodiment are: The workers locate the punching points on the construction surface and drill holes at the punching points on the construction surface to obtain downward anchor holes. Then the workers perform the following preparations: the anchor head 11 is fixedly connected to one end of the FRP anchor rod 13, the clamping assembly 4 is installed on the outside of the FRP anchor rod 13 away from the anchor head 11, the push rod 3 is inserted into the through hole of the FRP anchor rod 13, the restraint 8 wraps the hose body 7 on the FRP anchor rod 13, the FRP anchor rod 13 drives the anchor head 11 to be inserted into the set depth of the anchor hole, and the lifting assembly 1 is against the end of the push rod 3 away from the anchor head 11.

[0037] The worker lengthens the jacking assembly 1, and the jacking assembly 1 pushes the jack rod 3 to move toward the anchor head 11, and makes the extrusion pressure between the jack rod 3 and the jacking assembly 1 reach the set range value. The worker uses the external grouting equipment to inject slurry into the bottom of the inner cavity of the hose body 7 through the grouting pipe 5. The slurry is resin slurry, cement slurry or cement mortar. The slurry in the hose body 7 will first fill the bottom of the inner cavity of the hose body 7. The hose body 7 is continuously expanded, so that the wall protection mud between the outside of the hose body 7 and the inner wall of the anchor hole flows to the outside of the anchor hole. The unbroken restraint 8 on the hose body 7 that is farthest from the clamping assembly 4 breaks first, and the hose body 7 is not damaged. The slurry continuously injected into the hose body 7 causes the restraint 8 on the hose body 7 to break one by one, and the grouting is stopped after the slurry in the hose body 7 reaches the set liquid level.

[0038] After the strength of the grouting body in the hose body 7 reaches 3.0 MPa-5.0 MPa, the worker removes the mandrel 3 and the clamping assembly 4 from the FRP anchor rod 13 .

[0039] The grouting equipment of this FRP anchor rod makes the slurry in the hose body 7 fill the bottom of the inner cavity of the hose body 7 first, and the hose body 7 adheres to the inner wall of the anchor hole, avoiding the mixing of the wall protection mud and the slurry in the anchor hole, thereby avoiding the imbalance of the slurry water-cement ratio, ensuring the interface bonding strength between the FRP anchor rod and the grouting body, and ensuring the bearing capacity of the anchoring system.

[0040] In the prior art, during the long-term stress-bearing process of the FRP anchor rod 13, stress relaxation is prone to occur due to factors such as material creep and surrounding rock deformation, resulting in a decrease in anchoring force. The jacking assembly 1, the jack 3, the clamping assembly 4 and the anchor head 11 cooperate to put the FRP anchor rod 13 in a tensioned state during the slurry consolidation process. The pre-tensioning force can offset part of the relaxation in advance and allow the FRP anchor rod 13 to participate in the stress earlier, thereby reducing the support pressure when the load suddenly increases in the later stage.

[0041] Furthermore, during the process of injecting slurry into the flexible pipe body 7 , the workers cast a plurality of test blocks to facilitate determining the strength of the grouting body of the flexible pipe body 7 .

[0042] Furthermore, the hose body 7 is made of a degradable material commonly used in the prior art, and the hose body 7 is made of polylactic acid fiber or plant fiber.

[0043] Furthermore, when grouting multiple FRP anchors, measures such as interval construction, intermittent construction or increasing the dosage of accelerator are adopted to prevent slurry bubbling and cross-hole phenomena in adjacent anchor holes.

[0044] Example 2: like Figure 3 and Figure 6 As shown, this embodiment discloses a pouring equipment for FRP anchor rods, and its structure is roughly the same as that of the first embodiment, except that this embodiment further includes a connecting piece 17 and a blocking piece 18, and the top rod 3 is provided with a slurry hole parallel to its length direction, and the outer side of the FRP anchor rod 13 is provided with a plurality of openings 15 connected to the slurry holes at equal intervals along its length direction, and each opening 15 is installed with a detachable blocking piece 16, one end of the top rod 3 is connected to the blocking piece 18 by the connecting piece 17, and the distance between the top rod 3 and the blocking piece 18 is less than the distance between two adjacent openings 15.

[0045] The push rod 3 drives the blocking piece 18 into the through hole of the FRP anchor rod 13, and there is a gap between the blocking piece 18 and the inner wall of the through hole of the FRP anchor rod 13, and the outer side of the push rod 3 and the through hole of the FRP anchor rod 13 are slidingly sealed.

[0046] Furthermore, the blocking member 18 is spherical or conical, the blocking member 16 is a rubber plug plugged on the opening 15 or a tape attached to the FRP anchor rod 13, and the connecting member 17 is a connecting rod or a connecting rope.

[0047] Furthermore, a length scale is provided on the outer side of the push rod 3 along its length direction, so that workers can easily determine the distance between one end of the push rod 3 located in the through hole and any one of the openings 15.

[0048] Preferably, the blocking member 18 is made of metal or plastic.

[0049] Preferably, the ratio of the area of ​​the minimum gap between the blocking member 18 and the through hole of the FRP anchor 13 to the area of ​​the opening 15 is 1.0:1.0-10.0.

[0050] The working process and principle of this embodiment are: After the strength of the grouting body in the hose body 7 reaches 4.0 MPa-5.5 MPa, the worker removes the clamping assembly 4 from the FRP anchor rod 13 and removes the push rod 3 from the through hole of the FRP anchor rod 13 .

[0051] The worker connects one end of the push rod 3 and the blocking piece 18 through the connecting piece 17. The worker causes the push rod 3 to drive the blocking piece 18 into the through hole of the FRP anchor rod 13, and one of the openings 15 is located between the push rod 3 and the blocking piece 18. The worker fixes the push rod 3 to the FRP anchor rod 13 by a clamp, bolt or clip.

[0052] The worker uses an external high-pressure grouting pump to inject a set volume of slurry into the through-hole on the FRP anchor 13 through the push rod 3. The pressure of the slurry in the push rod 3 is greater than the strength of the grouting body in the hose body 7. The slurry in the through-hole pushes open the plug 16 of one opening 15, and causes the grouting body at the opening 15 and the hose body 7 to break. Then the worker moves the push rod 3 outside the through-hole of the FRP anchor 13 by the distance between two adjacent openings 15 and repeats the above operation.

[0053] The slurry flowing out of the opening 15 forms an extended bulge after solidifying in the stratum, thereby enhancing the anchoring force of the FRP anchor rod 13 . In addition, the amount of slurry used is small, thereby reducing the construction cost of anchoring the FRP anchor rod 13 .

[0054] Furthermore, by changing the distance between two adjacent openings 15 during the production of the FRP anchor 13 , the breakage of the grouting body at two adjacent openings 15 on the FRP anchor 13 does not affect the tension force on the FRP anchor 13 .

[0055] In the existing technology, slurry leakage and incomplete grouting are prone to occur in soft clay or broken rock formations. The grouting equipment of this FRP anchor rod reduces slurry waste and controls the amount of slurry lost to surrounding cracks.

[0056] Furthermore, a force sensor is installed on the jacking assembly 1 to facilitate workers to control the squeezing force of the jacking assembly 1 on the jacking rod 3.

[0057] Example 3: like Figure 1-Figure 4 、 Figure 7 As shown, this embodiment discloses a pouring equipment for FRP anchor rods, and its structure is roughly the same as that of the first or second embodiment, except that, in this embodiment, an annular tube 9 is sleeved on the outside of the flexible pipe body 7, and no less than three water spray holes 14 are provided on the outside of the annular tube 9 at positions corresponding to the anchor head 11, and no less than three elastic rods 10 are fixed at equal angles on the outside of the annular tube 9 at positions corresponding to the anchor head 11, and the inner cavity of the annular tube 9 is connected to one end of the conduit 6.

[0058] The working process and principle of this embodiment are: During the process of injecting slurry into the inner cavity of the hose body 7, the worker uses an external liquid pump to pump the wall protection mud into the annular tube 9 through the conduit 6. The wall protection mud in the annular tube 9 is sprayed out through the water spray hole 14, causing the deposited bentonite at the junction of the expanded area and the unexpanded area outside the hose body 7 to churn, and continuously injecting slurry into the hose body 7. The expanded area of ​​the hose body 7 pushes the annular tube 9 to move toward the orifice of the anchor hole through the elastic rod 10, so that the wall protection mud sprayed out of the water spray hole 14 cleans the bentonite deposited on the outside of the hose body 7, thereby avoiding the necking of the grouting body on the FRP anchor rod 13.

[0059] Furthermore, the worker continuously pulls the conduit 6 to prevent the conduit 6 from being trapped between the hose body 7 and the anchor hole.

[0060] Furthermore, the worker adjusts the number of elastic rods 10 and / or the weight of the annular tube 9 and / or the flow rate of the wall protection mud at the water spray hole 14 to keep the elastic rods 10 in contact with the expansion area outside the hose body 7.

[0061] Furthermore, the difference between the inner diameter of the annular tube 9 and the inner diameter of the FRP anchor 13 is 0.5 cm to 3.0 cm.

[0062] Example 4: like Figure 1-Figure 4 、 Figure 7 As shown, this embodiment discloses a pouring equipment for FRP anchor rods, and its structure is roughly the same as that of the third embodiment. The difference is that the annular tube 9 of this embodiment includes two arc tubes arranged opposite to each other, and both ends of the arc tubes are opened. The adjacent ends of the two arc tubes are connected by a clamping tube, and the inner cavity of one arc tube is connected to one end of the catheter 6. The annular tube 9 is easy to install and disassemble.

[0063] Embodiment 5: like Figure 2 、 Figure 3 and Figure 4 As shown, this embodiment discloses a pouring equipment for FRP anchor rods, and its structure is roughly the same as that of the first embodiment, except that a spiral steel bar 12 is provided on the outer side of the FRP anchor rod 13 of this embodiment, and the steel bar 12 is located in the hose body 7, and a spiral protrusion is provided on the outer side of the FRP anchor rod 13.

[0064] The working process and principle of this embodiment are: The steel bars 12 enhance the strength of the grouting body, and the protrusions on the outside of the FRP anchor rod 13 enhance the contact area between the grouting body and the FRP anchor rod 13. The protrusions on the outside of the FRP anchor rod 13 will be embedded in the interior of the grouting body to prevent relative sliding between the anchor rod and the grouting body, and convert the simple friction force into a composite constraint of friction and mechanical bite force, thereby avoiding the FRP anchor rod 13 from being pulled out due to insufficient bonding.

[0065] Example 6: This embodiment discloses a pouring equipment for FRP anchor rods, the structure of which is roughly the same as that of the fifth embodiment, except that the clamping assembly 4 of this embodiment is a round tube, and a spiral groove is provided on the round tube to adapt to the spiral protrusion on the outside of the FRP anchor rod 13, so that the clamping assembly 4 is easy to install or disassemble on the FRP anchor rod 13.

[0066] Embodiment seven: like Figure 5As shown, this embodiment discloses a pouring equipment for FRP anchor rods, and its structure is roughly the same as that of the first embodiment, except that the clamping assembly 4 of this embodiment includes two clamping plates 41 arranged opposite to each other, and elastic blocks 43 are fixed on the inner sides of the two clamping plates 41, and the two clamping plates 41 are connected by a positioning member 42.

[0067] Preferably, the elastic block 43 is an elastic rubber block or an elastic silicone block. A spiral protrusion is provided on the outside of the FRP anchor rod 13 , and a slot adapted to the protrusion is provided on the elastic block 43 .

[0068] Preferably, the positioning member 42 is a nut-bolt fixing member or a snap-fit ​​fixing member.

[0069] The working process and principle of this embodiment are: The two clamping plates 41 are fixed on the FRP anchor rod 13 through the positioning piece 42 , and the two elastic blocks 43 are in contact with the FRP anchor rod 13 , thereby reducing the risk of the FRP anchor rod 13 being squeezed and broken.

[0070] Embodiment 8: like Figure 1-Figure 5 As shown, an FRP anchor pouring process, applicable to the pouring equipment of the FRP anchor in any one of the first to seventh embodiments, comprises the following steps: The drilling points are located on the construction surface, and anchor holes are drilled on the construction surface.

[0071] The anchor head 11 is fixedly connected to one end of the FRP anchor rod 13, the clamping assembly 4 is installed on the outside of the FRP anchor rod 13 away from the anchor head 11, the push rod 3 is inserted into the through hole of the FRP anchor rod 13, the restraint 8 wraps the hose body 7 on the FRP anchor rod 13, the FRP anchor rod 13 drives the anchor head 11 to be inserted into the anchor hole, and the lifting assembly 1 is against the end of the push rod 3 away from the anchor head 11.

[0072] The jacking assembly 1 pushes the jack rod 3 to move toward the anchor head 11, and the extrusion force between the jack rod 3 and the jacking assembly 1 reaches a set range value.

[0073] The external grouting equipment injects slurry into the bottom of the inner cavity of the hose body 7 through the grouting pipe 5, and the slurry continuously injected into the hose body 7 causes the restraining parts 8 on the hose body 7 to break one by one. The grouting is stopped after the slurry in the hose body 7 reaches the set liquid level. The slurry is resin slurry, cement slurry or cement mortar.

[0074] After the strength of the grouting body in the hose body 7 reaches 3.0 MPa-5.0 MPa, the mandrel 3 and the clamping assembly 4 on the FRP anchor rod 13 are removed.

[0075] The working process and principle of this embodiment are: The grouting equipment of this FRP anchor rod allows the slurry in the hose body 7 to preferentially fill the bottom of the inner cavity of the hose body 7. The hose body 7 adheres to the inner wall of the anchor hole, avoiding mixing of the wall protection mud and the slurry in the anchor hole, thereby avoiding imbalance of the slurry water-cement ratio, ensuring the interface bonding strength between the FRP anchor rod and the grouting body, and ensuring the bearing capacity of the anchoring system. In addition, the FRP anchor rod grouting process is simple to operate and easy to promote.

[0076] Furthermore, workers conduct strength tests on the grouting body according to different combinations of grouting interval time and grouting temperature to obtain a comparison table of the consolidation strength of the grouting body.

[0077] Embodiment 9: like Figures 1-6 As shown, this embodiment discloses an FRP anchor pouring process, which includes the following steps based on the eighth embodiment: After the strength of the grouting body in the hose body 7 reaches 4.0 MPa-5.5 MPa, the push rod 3 drives the blocking member 18 to enter the through hole of the FRP anchor rod 13 .

[0078] An external high-pressure grouting pump injects a set volume of slurry into the through hole on the FRP anchor 13 through the push rod 3. The slurry in the through hole pushes open the plug 16 of an opening 15 and causes the grouting body at the opening 15 to break. The broken grouting body pierces the flexible pipe body 7. Then the push rod 3 moves outside the through hole of the FRP anchor 13 by the distance between two adjacent openings 15, and the above operation is repeated.

[0079] The working process and principle of this embodiment are: The slurry flowing out of the opening 15 forms an extended bulge after solidifying in the stratum, thereby enhancing the anchoring force of the FRP anchor rod 13 . In addition, the amount of slurry used is small, thereby reducing the construction cost of anchoring the FRP anchor rod 13 .

[0080] Embodiment 10: like Figure 1-Figure 4 、 Figure 7 As shown, this embodiment discloses an FRP anchor pouring process. Based on the ninth embodiment, during the process of injecting slurry into the inner cavity of the flexible pipe body 7, an external liquid pump pumps wall protection mud into the annular pipe 9 through the conduit 6.

[0081] The working process and principle of this embodiment are: During the process of injecting slurry into the inner cavity of the hose body 7, the worker uses an external liquid pump to pump the wall protection mud into the annular tube 9 through the conduit 6. The wall protection mud in the annular tube 9 is sprayed out through the water spray hole 14, causing the deposited bentonite at the junction of the expanded area and the unexpanded area outside the hose body 7 to churn, and continuously injecting slurry into the hose body 7. The expanded area of ​​the hose body 7 pushes the annular tube 9 toward the orifice of the anchor hole through the elastic rod 10, so that the wall protection mud sprayed out of the water spray hole 14 clears the bentonite deposited on the outside of the hose body 7, thereby avoiding the necking of the grouting body on the FRP anchor rod 13.

[0082] While the embodiments of the present invention have been shown and described, it will be apparent to those skilled in the art that various changes, modifications, substitutions, and alterations can be made to the embodiments without departing from the principles and spirit of the invention.

Claims

1. A pouring equipment for FRP anchor, characterized by: It comprises a clamping assembly (4) and an anchor head (11), the outer side of the anchor head (11) is fixedly connected to one end of a flexible pipe body (7), a push rod (3) and a grouting pipe (5) are provided in the flexible pipe body (7), one end of the push rod (3) extends to the outside of the flexible pipe body (7), and one end of the grouting pipe (5) extends to the outside of the flexible pipe body (7); A support frame (2) is fixed on the clamping assembly (4), and a jacking assembly (1) is provided on the support frame (2); The flexible pipe body (7) is provided with an FRP anchor rod (13), the anchor head (11) and one end of the FRP anchor rod (13) are fixedly connected, the length of the FRP anchor rod (13) is less than the length of the top rod (3), the FRP anchor rod (13) is provided with a through hole arranged parallel to the length thereof, the top rod (3) is passed through the through hole, and a plurality of restraining members (8) are fixed on the outside of the flexible pipe body (7) so as to wrap the flexible pipe body (7) around the FRP anchor rod (13); The clamping assembly (4) is installed at a position outside the FRP anchor rod (13) away from the anchor head (11), and the lifting assembly (1) is against an end of the jack rod (3) away from the anchor head (11).

2. The FRP anchor pouring equipment according to claim 1, characterized in that: It also includes a connecting piece (17) and a blocking piece (18), the top rod (3) is provided with a grouting hole parallel to its length direction, the outer side of the FRP anchor rod (13) is provided with a plurality of openings (15) connected to the grouting holes at equal intervals along its length direction, each opening (15) is installed with a detachable blocking piece (16), one end of the top rod (3) is connected to the blocking piece (18) through the connecting piece (17), and the distance between the top rod (3) and the blocking piece (18) is less than the distance between two adjacent openings (15); The push rod (3) drives the blocking member (18) to enter the through hole of the FRP anchor rod (13), and there is a gap between the blocking member (18) and the inner wall of the through hole of the FRP anchor rod (13), and the outer side of the push rod (3) and the through hole of the FRP anchor rod (13) are slidably fitted.

3. The FRP anchor pouring equipment according to claim 2, characterized in that: An annular tube (9) is sleeved on the outside of the flexible tube body (7), and at least three water spray holes (14) are provided on the outside of the annular tube (9) at positions corresponding to the anchor heads (11). At least three elastic rods (10) are fixed at equal angles on the outside of the annular tube (9) at positions corresponding to the anchor heads (11), and the inner cavity of the annular tube (9) is connected to one end of the conduit (6).

4. The FRP anchor pouring equipment according to claim 2, characterized in that: The blocking member (18) is spherical or conical.

5. The FRP anchor pouring equipment according to claim 1, characterized in that: The outer side of the FRP anchor rod (13) is sheathed with a spiral steel bar (12), and the steel bar (12) is located in the flexible pipe body (7). The outer side of the FRP anchor rod (13) is provided with a spiral protrusion.

6. The FRP anchor pouring equipment according to claim 1, characterized in that: The clamping assembly (4) comprises two clamping plates (41) arranged opposite to each other, elastic blocks (43) being fixed on the inner sides of the two clamping plates (41), and the two clamping plates (41) are connected via a positioning member (42).

7. The FRP anchor pouring equipment according to claim 1, characterized in that: The lifting component (1) is a rack jack, a screw jack, a hydraulic cylinder or a pneumatic cylinder, and the hose body (7) is made of soft plastic material or a woven bag material.

8. An FRP anchor pouring process, applicable to the FRP anchor pouring equipment according to any one of claims 1 to 7, characterized in that: The following steps are involved: Locate the punching points on the construction surface and drill holes on the construction surface to obtain anchor holes; The anchor head (11) and one end of the FRP anchor rod (13) are fixedly connected, the clamping assembly (4) is installed on the outside of the FRP anchor rod (13) at a position away from the anchor head (11), the push rod (3) is inserted into the through hole of the FRP anchor rod (13), the binding member (8) wraps the hose body (7) on the FRP anchor rod (13), the FRP anchor rod (13) drives the anchor head (11) to be inserted into the anchor hole, and the lifting assembly (1) is against the end of the push rod (3) away from the anchor head (11); The jacking assembly (1) pushes the push rod (3) to move toward the anchor head (11), and the extrusion force between the push rod (3) and the jacking assembly (1) reaches a set range value; The external grouting equipment injects slurry into the bottom of the inner cavity of the hose body (7) through the grouting pipe (5), and the slurry continuously injected into the hose body (7) causes the restraining parts (8) on the hose body (7) to break in sequence. The grouting is stopped after the slurry in the hose body (7) reaches a set liquid level. The slurry is resin slurry, cement slurry or cement mortar. After the strength of the grouting body formed by the solidification of the slurry in the hose body (7) reaches 3.0 MPa-5.0 MPa, the top rod (3) and the clamping assembly (4) on the FRP anchor rod (13) are removed.

9. The FRP anchor pouring process according to claim 8, characterized in that: The following steps are involved: After the strength of the grouting body in the hose body (7) reaches 4.0 MPa-5.5 MPa, the push rod (3) drives the blocking member (18) into the through hole of the FRP anchor rod (13); An external high-pressure grouting pump injects a set volume of slurry into the through hole on the FRP anchor rod (13) through the push rod (3), and the slurry in the through hole pushes open a plugging piece (16) of an opening (15), and causes the grouting body at the opening (15) to break and the hose body (7) to break, and then the push rod (3) moves outside the through hole of the FRP anchor rod (13) by the distance between two adjacent openings (15), and the above operation is repeated.

10. The FRP anchor pouring process according to claim 9, characterized in that: The following steps are involved: During the process of injecting slurry into the inner cavity of the flexible pipe body (7), the external liquid pump pumps the wall protection slurry into the annular pipe (9) through the conduit (6).

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