Grouting anchor rod for geological disaster prevention and control engineering construction

Abstract

The utility model belongs to the technical field of geological and geotechnical engineering, and relates to a grouting anchor rod for geological disaster prevention and control engineering construction. The anchor rod comprises an anchor rod main body and a drill bit body. When the grouting device is used, slurry is firstly poured into the first grouting side cavity, the first expansion type slurry grabbing structure located in the first grouting side cavity is pressed downwards and rotated through the pressure of the slurry in the first grouting side cavity, the first expansion type slurry grabbing structure is expanded, then the slurry is poured into the second grouting side cavity, and the slurry in the second grouting side cavity is separated from the second grouting side cavity. The portion, located in the second grouting side cavity, of the second unfolding type grout grabbing structure is pressed downwards to rotate through the pressure of the grout in the second grouting side cavity, the second unfolding type grout grabbing structure is unfolded, finally, the grout is poured into the center grouting part and extends into the hole through the grouting extension communication part, and pressure grouting is completed. A hole bottom reverse grouting mode is adopted, and a first expansion type grout grabbing structure and a second expansion type grout grabbing structure are matched, so that the better fixing effect and stability are achieved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to geological rock and soil engineering technical field relates to a grouting anchor rod for geological disaster prevention engineering construction. BACKGROUND

[0002] The grouting anchor rod is a new product developed according to the actual needs of tunnel engineering, slope treatment engineering and coal mine roadway engineering in China. The main products include: ordinary hollow grouting anchor rod; self-feeding hollow grouting anchor rod; expansion shell type hollow grouting anchor rod; combined hollow grouting anchor rod. The anchor rod body of the grouting anchor rod is designed as hollow, and the hole in the rod body is used as a drilling high-pressure air and water channel and a grouting channel. Compared with the solid rod body, the hollow rod body design can obtain better stiffness and shear strength. In the construction of geological disaster prevention engineering, grouting anchor rods are needed to grout and reinforce the internal structure. However, the existing grouting anchor rods lack a grout grabbing and fixing structure that can be expanded after being placed in the hole. After the mud is directly grouted into the hollow hole of the anchor rod, the anchor rod is prone to looseness, and the fixing effect and stability are general. Therefore, there is an urgent need to design a grouting anchor rod for geological disaster prevention engineering construction that can overcome the above defects.

[0003] In order to overcome the deficiencies of the prior art, people have explored various solutions. For example, a new grouting anchor rod for geological disaster prevention engineering construction [application number: 202023287330.3] is disclosed in Chinese patent, which includes a connecting plate and an anchoring head, the center of the bottom end of the connecting plate is fixedly connected with the anchoring head, a through slot is formed in the middle of the top end of the anchoring head, two shafts are fixedly connected on both sides of the bottom end of the through slot, two stable claws are rotatably connected in the middle of the two shafts, one end of each of the two stable claws is fixedly connected with one end of a spring, a rod core is fixedly connected at the center of the top end of the connecting plate, a grouting hole core is formed in the center of the rod core, grouting holes are formed on both sides of the middle and on both sides of the top of the rod core, and the four grouting holes are in communication with the grouting hole core. However, the anchor rod still lacks a grout grabbing and fixing structure that can be expanded after being placed in the hole. If the mud is directly grouted into the hollow hole of the anchor rod, the anchor rod is still prone to looseness. If the fixing device cannot be retracted and extended, it may be stuck when being placed. There are defects such as general fixing effect and stability. UTILITY MODEL CONTENTS

[0004] The utility model aims at the above problem, and provides a grouting anchor rod for geological disaster prevention engineering construction.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] The utility model provides a grouting anchor rod for geological disaster prevention engineering construction, including anchor rod main part and drill bit body, the inside of anchor rod main part has the central grouting part, the bottom side part of central grouting part is equipped with grouting extension communication part, central grouting part is linked with grouting extension communication part, the inside of anchor rod main part is equipped with first grouting side cavity and second grouting side cavity, first grouting side cavity, second grouting side cavity and central grouting part staggered arrangement, be equipped with the first unfolding formula grab grout structure of one end in anchor rod main part outside, the other end extends to first grouting side cavity and with anchor rod main part relative rotation cooperation on anchor rod main part, still be equipped with the second unfolding formula grab grout structure of one end in anchor rod main part outside, the other end extends to second grouting side cavity and with anchor rod main part relative rotation cooperation on anchor rod main part, first unfolding formula grab grout structure and second unfolding formula grab grout structure staggered arrangement.

[0007] In the grouting anchor rod for geological disaster prevention engineering construction, the first unfolding formula grab grout structure includes a plurality of first grab grout expansion plates arranged on the anchor rod main body, and the first grab grout expansion plates and the anchor rod main body are connected through first rotation shafts.

[0008] In the grouting anchor rod for geological disaster prevention engineering construction, one end of the first grab grout expansion plate is located outside the anchor rod main body, and the other end extends into the first grouting side cavity. The end portion of the first grab grout expansion plate extending into the first grouting side cavity is arc-shaped.

[0009] In the grouting anchor rod for geological disaster prevention engineering construction, the second unfolding formula grab grout structure includes a plurality of second grab grout expansion plates arranged on the anchor rod main body, and the second grab grout expansion plates and the anchor rod main body are connected through second rotation shafts.

[0010] In the grouting anchor rod for geological disaster prevention engineering construction, one end of the second grab grout expansion plate is located outside the anchor rod main body, and the other end extends into the second grouting side cavity. The end portion of the second grab grout expansion plate extending into the second grouting side cavity is arc-shaped.

[0011] In the grouting anchor rod for geological disaster prevention engineering construction, the depth of the first grouting side cavity is greater than the depth of the second grouting side cavity.

[0012] In the grouting anchor rod for geological disaster prevention engineering construction, the second grab grout expansion plate is located above the first grab grout expansion plate.

[0013] In the grouting anchor rod for geological disaster prevention engineering construction, the central grouting part includes a central grouting chamber arranged in the anchor rod main body, and the first grouting side cavity and the second grouting side cavity are staggered with the central grouting chamber.

[0014] In the grouting anchor rod for geological disaster prevention engineering construction, the grouting extension communication part comprises a plurality of transverse channels arranged in an annular array along the center point of the anchor rod body, the transverse channels are communicated with the central grouting chamber, and the first grouting side chamber and the second grouting side chamber are staggered with the transverse channels.

[0015] In the grouting anchor rod for geological disaster prevention engineering construction, the tail part of the anchor rod body is provided with a threaded part, and the tail part of the anchor rod body is sleeved with a grout stopper and a nut which are screwed with the threaded part.

[0016] Compared with the prior art, the grouting anchor rod for geological disaster prevention engineering construction has the following advantages:

[0017] 1、The utility model discloses a grouting anchor rod for geological disaster prevention engineering construction, which comprises an anchor rod body, a drill bit body, a first grouting side chamber, a second grouting side chamber and a central grouting chamber.

[0018] 2、The utility model discloses a grouting anchor rod for geological disaster prevention engineering construction, which comprises an anchor rod body, a drill bit body, a first grouting side chamber, a second grouting side chamber and a central grouting chamber.

[0019] Other advantages, objects and features of the utility model will be embodied partly through the following description, and will be understood by those skilled in the art through research and practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is the structural schematic diagram of the utility model.

[0021] Figure 2 It is the structural schematic diagram of another direction of the utility model.

[0022] Figure 3 It is the sectional view of the anchor rod body.

[0023] Figure 4 is Figure 2 a cross-sectional view at A-A in the figure.

[0024] In the figure: anchor rod body 1, drill bit body 2, central grouting part 3, central grouting chamber 33, grouting extension communication part 4, first grouting side chamber 5, second grouting side chamber 6, first unfolding grouting structure 7, second unfolding grouting structure 8, first grouting unfolding plate 9, first rotating shaft 10, second grouting unfolding plate 11, second rotating shaft 12, transverse channel 13, threaded part 14, grouting plug 15, nut 16. DETAILED DESCRIPTION

[0025] The utility model will be further explained in connection with the drawings below.

[0026] As Figures 1-4 shown, a grouting anchor rod for geological disaster prevention engineering construction, including anchor rod body 1 and drill bit body 2, the anchor rod body 1 inside has central grouting part 3, the central grouting part 3 bottom side part is equipped with grouting extension communication part 4, the central grouting part 3 is connected with grouting extension communication part 4, the anchor rod body 1 still is equipped with first grouting side chamber 5 and second grouting side chamber 6 in, first grouting side chamber 5, second grouting side chamber 6 and central grouting part 3 staggered arrangement, the anchor rod body 1 is equipped with one end is located anchor rod body 1 outside, the other end extends to first grouting side chamber 5 and with anchor rod body 1 rotating cooperation's first unfolding grouting structure 7, the anchor rod body 1 still is equipped with one end is located anchor rod body 1 outside, the other end extends to second grouting side chamber 6 and with anchor rod body 1 rotating cooperation's second unfolding grouting structure 8, first unfolding grouting structure 7 and second unfolding grouting structure 8 staggered arrangement.

[0027] In this embodiment, in use, first through the drilling machine drilling operation, drill to the design depth, anchor rod body 1 and drill bit body 2 are put into the hole, first grouting into first grouting side chamber 5, through the mud pressure in first grouting side chamber 5 the first unfolding grouting structure 7 part in first grouting side chamber 5 is pressed down and rotates, first unfolding grouting structure 7 is unfolded, again grouting into second grouting side chamber 6, through the mud pressure in second grouting side chamber 6 the second unfolding grouting structure 8 part in second grouting side chamber 6 is pressed down and rotates, second unfolding grouting structure 8 is unfolded, finally grouting into central grouting part 3, and through grouting extension communication part 4 extends to the hole, completes pressure grouting, adopts hole bottom reverse grouting mode, cooperates first unfolding grouting structure 7 and second unfolding grouting structure 8, realizes better fixing effect and stability, adopts the grouting structure of chamber, ensures that first unfolding grouting structure 7 and second unfolding grouting structure 8 can be unfolded, avoids the problem that cannot be unfolded after grouting, compact and reasonable structure.

[0028] In combination Figures 1-4 As shown in the figure, the first unfolding grout grabbing structure 7 includes a plurality of first grout grabbing panels 9 arranged on the anchor rod body 1, the first grout grabbing panels 9 are connected with the anchor rod body 1 through the first rotating shaft 10, one end of the first grout grabbing panels 9 is located outside the anchor rod body 1, and the other end extends into the first grout side cavity 5, and the end of the first grout grabbing panels 9 extending into the first grout side cavity 5 is arc-shaped.

[0029] In this embodiment, the mud is poured into the first grout side cavity 5, the first grout grabbing panels 9 located in the first grout side cavity 5 are pressed and rotated by the mud pressure in the first grout side cavity 5, and the first rotating shaft 10 is used for rotating and unfolding the first grout grabbing panels 9.

[0030] In combination Figure 1 , Figure 2 As shown in the figure, the second unfolding grout grabbing structure 8 includes a plurality of second grout grabbing panels 11 arranged on the anchor rod body 1, the second grout grabbing panels 11 are connected with the anchor rod body 1 through the second rotating shaft 12, one end of the second grout grabbing panels 11 is located outside the anchor rod body 1, and the other end extends into the second grout side cavity 6, and the end of the second grout grabbing panels 11 extending into the second grout side cavity 6 is arc-shaped.

[0031] In this embodiment, the mud is poured into the second grout side cavity 6, the second grout grabbing panels 11 located in the second grout side cavity 6 are pressed and rotated by the mud pressure in the second grout side cavity 6, and the second rotating shaft 12 is used for rotating and unfolding the second grout grabbing panels 11.

[0032] In combination Figures 1-2 As shown in the figure, the depth of the first grout side cavity 5 is greater than the depth of the second grout side cavity 6, and the second grout grabbing panels 11 are located above the first grout grabbing panels 9.

[0033] In this embodiment, during grouting, the first grout grabbing panels 9 located below the anchor rod body 1 are unfolded first, and then the second grout grabbing panels 11 located above the first grout grabbing panels 9 are unfolded, which is a step-by-step operation to avoid mutual interference.

[0034] In combination Figures 1-4 As shown in the figure, the center grouting part 3 includes a center grouting chamber 33 arranged in the anchor rod body 1, the first grout side cavity 5 and the second grout side cavity 6 are staggered with the center grouting chamber 33, the grouting extension communication part 4 includes a plurality of transverse channels 13 arranged in the anchor rod body 1 in a ring array around the center point of the anchor rod body 1, the transverse channels 13 are connected with the center grouting chamber 33, and the first grout side cavity 5 and the second grout side cavity 6 are staggered with the transverse channels 13.

[0035] In the embodiment, the mud is filled into the central grouting chamber 33 and extends into the hole through the transverse channel 13 to complete pressure grouting, and the reverse grouting mode at the bottom of the hole is adopted to achieve good reinforcement effect.

[0036] In combination Figures 1-2 As shown, the tail of the anchor rod body 1 has a threaded portion 14, and the tail of the anchor rod body 1 is sleeved with a grout stopper 15 and a nut 16 which are screwed with the threaded portion 14.

[0037] In the embodiment, after grouting is completed, the grout stopper 15 and the nut 16 are screwed with the threaded portion 14 at the tail of the anchor rod body 1 to fix the tail.

[0038] The working principle of the utility model is:

[0039] In use, first, drilling is performed by a drilling machine, and after drilling to the designed depth, the anchor rod body 1 and the drill bit body 2 are placed into the hole, the mud is first filled into the first grouting side chamber 5, the first grouting flap 9 part located in the first grouting side chamber 5 is pressed downward and rotated by the mud pressure in the first grouting side chamber 5, the first rotating shaft 10 is used to rotate and unfold, and the first grouting flap 9 is unfolded, then the mud is filled into the second grouting side chamber 6, the second grouting flap 11 part located in the second grouting side chamber 6 is pressed downward and rotated by the mud pressure in the second grouting side chamber 6, the second rotating shaft 12 is used to rotate and unfold, and the second grouting flap 11 is unfolded, the mud is filled into the central grouting chamber 33 and extends into the hole through the transverse channel 13 to complete pressure grouting, the reverse grouting mode at the bottom of the hole is adopted, the first grouting flap 9 and the second grouting flap 11 are cooperated to achieve better fixing effect and stability, the sub-chamber grouting structure is adopted to ensure that the first grouting flap 9 and the second grouting flap 118 can be unfolded, the problem that the grouting flap cannot be unfolded after grouting is avoided, the structure is compact and reasonable,

[0040] During grouting, the first grouting flap 9 located below the anchor rod body 1 is unfolded first, and then the second grouting flap 11 located above the first grouting flap 9 is unfolded, the operation is performed in steps to avoid mutual interference,

[0041] After grouting is completed, the grout stopper 15 and the nut 16 are screwed with the threaded portion 14 at the tail of the anchor rod body 1 to fix the tail.

[0042] The specific embodiments described herein are merely illustrative of the spirit of the utility model. Those skilled in the art to which the utility model belongs can make various modifications or supplements to the described specific embodiments or adopt similar ways to replace, but will not deviate from the spirit of the utility model.

[0043] Although the terms of anchor rod body 1, drill bit body 2, central grouting part 3, central grouting chamber 33, grouting extension communication part 4, first grouting side chamber 5, second grouting side chamber 6, first unfolded grouting structure 7, second unfolded grouting structure 8, first grouting unfolding plate 9, first rotating shaft 10, second grouting unfolding plate 11, second rotating shaft 12, transverse channel 13, threaded part 14, grouting stopper 15, nut 16 are used more in this text, the possibility of using other terms is not excluded. Using these terms is only for more conveniently describing and explaining the essence of the utility model, and it is contrary to the spirit of the utility model to explain them as any kind of additional limitation.

Claims

1. A grouting anchor rod for use in a geological disaster prevention engineering construction, comprising an anchor rod main body (1) and a drill bit body (2), characterized in that, The anchor rod body (1) has a central grouting part (3) inside, the bottom side of the central grouting part (3) is provided with a grouting extension communication part (4), the central grouting part (3) and the grouting extension communication part (4) are communicated, the anchor rod body (1) is further provided with a first grouting side cavity (5) and a second grouting side cavity (6), the first grouting side cavity (5), the second grouting side cavity (6) and the central grouting part (3) are staggered, the anchor rod body (1) is provided with a first unfolding type grouting structure (7) with one end located outside the anchor rod body (1) and the other end extending into the first grouting side cavity (5) and being rotatably matched with the anchor rod body (1), the anchor rod body (1) is further provided with a second unfolding type grouting structure (8) with one end located outside the anchor rod body (1) and the other end extending into the second grouting side cavity (6) and being rotatably matched with the anchor rod body (1), the first unfolding type grouting structure (7) and the second unfolding type grouting structure (8) are staggered.

2. The grouting anchor rod for the geological disaster prevention engineering construction according to claim 1, characterized in that, The first unfolding type grouting structure (7) comprises a plurality of first grouting unfolding plates (9) arranged on the anchor rod body (1), and the first grouting unfolding plates (9) and the anchor rod body (1) are connected through first rotating shafts (10).

3. The grouting anchor rod for the geological disaster prevention engineering construction according to claim 2, characterized in that, One end of the first grouting unfolding plate (9) is located outside the anchor rod body (1), and the other end extends into the first grouting side cavity (5), and the end of the first grouting unfolding plate (9) extending into the first grouting side cavity (5) is arc-shaped.

4. The grouting anchor rod for a geological disaster prevention engineering construction according to claim 3, characterized in that, The second unfolding type grouting structure (8) comprises a plurality of second grouting unfolding plates (11) arranged on the anchor rod body (1), and the second grouting unfolding plates (11) and the anchor rod body (1) are connected through second rotating shafts (12).

5. The grouting anchor rod for a geological disaster prevention engineering construction according to claim 4, characterized in that, One end of the second grouting unfolding plate (11) is located outside the anchor rod body (1), and the other end extends into the second grouting side cavity (6), and the end of the second grouting unfolding plate (11) extending into the second grouting side cavity (6) is arc-shaped.

6. The grouting anchor rod for a geological disaster prevention engineering construction according to claim 5, characterized in that, The depth of the first grouting side cavity (5) is greater than the depth of the second grouting side cavity (6).

7. The grouting anchor rod for a geological disaster prevention engineering construction according to claim 6, characterized in that, The second grouting unfolding plate (11) is located above the first grouting unfolding plate (9).

8. The grouting anchor rod for a geological disaster prevention engineering construction according to claim 7, characterized in that, The central grouting part (3) comprises a central grouting chamber (33) arranged in the anchor rod body (1), and the first grouting side cavity (5) and the second grouting side cavity (6) are staggered with the central grouting chamber (33) respectively.

9. The grouting anchor rod for a geological disaster prevention engineering construction according to claim 8, characterized in that, The grouting extension communication part (4) comprises a plurality of transverse channels (13) arranged in the anchor rod body (1) in a ring array around the center point of the anchor rod body (1), the transverse channels (13) are communicated with the central grouting chamber (33), and the first grouting side cavity (5) and the second grouting side cavity (6) are staggered with the transverse channels (13) respectively.

10. The grouting anchor rod for a geological disaster prevention engineering construction according to claim 1, characterized in that, The tail part of the anchor rod body (1) has a threaded part (14), and the tail part of the anchor rod body (1) is sleeved with a grouting plug (15) and a nut (16) which are screwed with the threaded part (14).

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