A rapid hole-sealing device and method for an annular space

Abstract

An embodiment of the present invention discloses a rapid hole-sealing device and method for an annular space, which relates to the field of bolt or cable support and can simply and quickly complete the plugging link in the hole-sealing construction of the annular space. It includes: a positioning push rod, which includes a positioning rod, a fixing ring and a handle; a hole-sealing positioning piece, which includes a positioning grout-stop upper piece, a positioning connecting piece and a positioning grout-stop lower piece; a clamping through hole is provided on the fixing ring, and multiple positioning rods are respectively inserted into the clamping through holes of the fixing ring; there is a blind hole on the positioning grout-stop upper piece, and through holes are respectively provided on the positioning connecting piece and the positioning grout-stop lower piece. The positioning grout-stop upper piece, the positioning connecting piece and the positioning grout-stop lower piece are sequentially installed on the positioning rod from top to bottom; grouting pipe positioning through holes are respectively provided on the positioning grout-stop upper piece, the positioning connecting piece and the positioning grout-stop lower piece, and plugging pipe positioning through holes are respectively further provided on the fixing ring, the positioning connecting piece and the positioning grout-stop lower piece; a grouting pipe is inserted into the grouting pipe positioning through hole, and a plugging pipe is inserted into the plugging pipe positioning through hole.

Description

Technical Field

[0001] The present invention relates to the technical field of bolt or cable support, and particularly to a rapid hole sealing device and method for an annular space. Background Art

[0002] As an effective support and reinforcement method for roadways, slopes, etc., anchor cables and bolts are widely used in related fields such as geotechnical engineering, mine exploitation, and subway tunnel construction. In the construction of anchor cable or bolt support, the plugging of the annular space hole formed by anchoring the anchor cable or bolt in the drill hole becomes an essential process.

[0003] In order to carry out grouting hole plugging construction, it is necessary to provide a simple and rapid auxiliary device suitable for hole plugging or sealing in the annular space hole. Summary of the Invention

[0004] In view of this, the embodiments of the present invention provide a rapid hole sealing device and method for an annular space, which can simply and rapidly complete the plugging link in the annular space hole plugging construction, so as to conveniently complete the hole plugging construction of the annular space.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] A rapid hole sealing device for an annular space, comprising: a positioning push rod and a hole sealing positioning piece. The positioning push rod includes a positioning rod, a fixing ring, and a handle. The hole sealing positioning piece includes a positioning grout stopping upper piece, a positioning connecting piece, and a positioning grout stopping lower piece;

[0007] The handle is a cylindrical structure. At one end of the cylindrical structure, a plurality of the positioning rods are axially provided. The plurality of positioning rods enclose a cylindrical space along the circumferential direction of the handle. The fixing ring is provided with clamping through holes, and the plurality of positioning rods are respectively fixed by passing through the clamping through holes of the fixing ring;

[0008] A plurality of laterally protruding anti-backflow parts are arranged at intervals along the length direction on the positioning rod. The positioning grout stopping upper piece, the positioning connecting piece, and the positioning grout stopping lower piece are respectively circular ring-shaped sheet structures. The positioning grout stopping upper piece has a blind hole, and the positioning connecting piece and the positioning grout stopping lower piece respectively have through holes. The positioning grout stopping upper piece, the positioning connecting piece, and the positioning grout stopping lower piece are sequentially installed on the positioning rod from top to bottom;

[0009] Wherein, the positioning connecting piece and the positioning grout stopping lower piece are sleeved on the positioning rod through the through holes, and the lower surface is pressed on the anti-backflow part. The positioning grout stopping upper piece is buckled on the upper end of the positioning rod through the blind hole;

[0010] Grouting pipe positioning through holes are respectively provided corresponding to the fixed ring, the upper positioning grout-stop piece, the positioning connection piece and the lower positioning grout-stop piece, and plugging pipe positioning through holes at corresponding positions are further respectively provided on the fixed ring, the positioning connection piece and the lower positioning grout-stop piece;

[0011] A grouting pipe is inserted through the grouting pipe positioning through hole, and a plugging pipe for injecting an expansion plugging material into the drill hole is inserted through the plugging pipe positioning through hole.

[0012] Preferably, the check portion of the protrusion is a barbed protrusion or a wedge-shaped protrusion.

[0013] Preferably, a gripper for clamping the grouting pipe and the plugging pipe is provided on the fixed ring.

[0014] Preferably, the gripper is a wire clamp or a hose clamp.

[0015] Preferably, the blind hole and the through hole are oval or circular, and the cross section of the positioning rod is arc-shaped or circular.

[0016] In a second aspect, the present invention also provides an embodiment of a hole sealing method, which is implemented based on any one of the hole sealing devices in the first aspect and is applied to the sealing of an annular space, including the steps of:

[0017] After the drill hole is completed, the anchor rod is inserted into the drill hole and anchored in the drill hole with an anchoring agent to form an annular space between the anchor rod and the drill hole;

[0018] The lower positioning grout-stop piece, the positioning connection piece and the upper grout-stop positioning piece are sequentially installed on the positioning rod of the positioning push rod, and the grouting pipe is sequentially inserted into the grouting pipe positioning through holes on the fixed ring and the hole sealing positioning piece, and the plugging pipe is inserted into the plugging pipe positioning through holes on the fixed ring and the hole sealing positioning piece, and fixed to form an integral hole sealing device;

[0019] The cylindrical space formed by multiple positioning rods is aligned and sleeved on the anchor rod, and the positioning rod is positioned by the cooperation of the anchor rod and the cylindrical space;

[0020] Slowly push the positioning rod into the annular space and reach the predetermined design position;

[0021] Loosen the grouting pipe and the plugging pipe fixed on the positioning push rod, pull out the positioning push rod from the annular space, and the remaining components form a hole sealing structure in the drill hole;

[0022] Inject an expansion plugging material through the plugging pipe, and after the expansion plugging material expands to fill the hole sealing section of the annular space and solidifies, the sealing of the annular space is completed.

[0023] Preferably, the method further includes: after the expansion plugging material expands to fill the hole-sealing section of the annular space and solidifies, injecting grouting material into the part of the annular space from the hole-sealing section to the bottom of the hole through the grouting pipe, so as to grout and reinforce the surrounding rock of the drill hole.

[0024] Preferably, when grouting through the grouting pipe, first inject thin cement slurry, then inject thick cement slurry, and finally inject expansive material to make up for the space for the hardening shrinkage of the cementitious grouting material, ensure the solidified material in the annular space is dense after grouting, improve the tensile performance of the bolt support body, and achieve the sealing of the drill hole water.

[0025] Preferably, a clamp is provided on the fixing ring; the method further includes: after inserting the grouting pipe into the positioning through hole and inserting the plugging pipe into the plugging pipe positioning through hole, using the clamp on the fixing ring to clamp the grouting pipe and the plugging pipe to be fixed as a whole with the positioning push rod;

[0026] Loosening the grouting pipe and the plugging pipe fixed on the positioning push rod means: loosening the clamp to separate the grouting pipe and the plugging pipe from the positioning push rod.

[0027] Preferably, barbed protrusions or wedge-shaped protrusions are respectively provided on the circumferential surfaces of the positioning grouting upper piece, the positioning connecting piece, and the positioning grouting lower piece of the hole-sealing positioning piece;

[0028] During the process of pulling out the positioning push rod from the annular space, using the barbed protrusions or wedge-shaped protrusions on each component of the hole-sealing positioning piece to abut against the inner wall of the drill hole to prevent the hole-sealing positioning piece from sliding out of the drill hole along with the push rod.

[0029] A hole-sealing device and method provided by an embodiment of the present invention include a positioning push rod and a hole-sealing positioning piece. The positioning push rod includes a positioning rod, a fixing ring, and a handle. The hole-sealing positioning piece includes a positioning slurry-stopping upper piece, a positioning connecting piece, and a positioning slurry-stopping lower piece. The handle is of a cylindrical structure. At one end of the cylindrical structure, a plurality of the positioning rods are axially provided. The plurality of positioning rods surround a cylindrical space along the circumferential direction of the handle. The fixing ring is provided with a clamping through hole, and the plurality of positioning rods are respectively fixed by passing through the clamping through holes of the fixing ring. Along the length direction of the positioning rod, a plurality of laterally protruding anti-backflow parts are provided at intervals. The positioning slurry-stopping upper piece, the positioning connecting piece, and the positioning slurry-stopping lower piece are respectively of an annular sheet structure. The positioning slurry-stopping upper piece has a blind hole, and the positioning connecting piece and the positioning slurry-stopping lower piece respectively have through holes. The positioning slurry-stopping upper piece, the positioning connecting piece, and the positioning slurry-stopping lower piece are sequentially installed on the positioning rod from top to bottom. The positioning connecting piece and the positioning slurry-stopping lower piece are sleeved on the positioning rod through the through holes, and the lower surfaces are pressed on the anti-backflow parts. The positioning slurry-stopping upper piece is buckled on the upper end of the positioning rod through the blind hole. Corresponding grouting pipe positioning through holes are respectively provided on the fixing ring, the positioning slurry-stopping upper piece, the positioning connecting piece, and the positioning slurry-stopping lower piece. Corresponding plugging pipe positioning through holes are also respectively provided at corresponding positions on the fixing ring, the positioning connecting piece, and the positioning slurry-stopping lower piece. A grouting pipe is inserted into the grouting pipe positioning through hole, and a plugging pipe for injecting an expansion plugging material into the drill hole is inserted into the plugging pipe positioning through hole. After the drill hole is completed and the anchor rod is inserted to form an annular space, the positioning push rod and the hole-sealing positioning piece thereon are pushed into the drill hole, and then the positioning push rod is pulled out, so that the plugging link in the hole-sealing construction of the annular space, namely the drill hole plugging, can be simply and quickly completed. Further, by injecting slurry and expansion material into the annular space through the grouting pipe and the plugging pipe, the hole-sealing construction of the annular space can be more conveniently completed. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0031] Figure 1 Structural schematic diagram of the application of the hole-sealing device in the surrounding rock in an embodiment of the present invention;

[0032] Figure 2 is Figure 1 Top view of the structure of the positioning slurry-stopping upper piece in an embodiment;

[0033] Figure 3 is Figure 2 Cross-sectional view of the structure of the positioning slurry-stopping upper piece

[0034] Figure 4 For Figure 1 Top view of the positioning connecting piece structure in an embodiment;

[0035] Figure 5 For Figure 4 Cross-sectional view of the positioning connecting piece structure;

[0036] Figure 6 Top view of the positioning grout-stop lower piece structure in an embodiment;

[0037] Figure 7 For Figure 6 Cross-sectional view of the positioning grout-stop lower piece structure;

[0038] Figure 8 For Figure 1 Schematic diagram of the positioning push rod structure in an embodiment;

[0039] Figure 9 For Figure 8 Top view of the positioning push rod;

[0040] Figure 10 Schematic diagram of the hole-sealing device structure in another embodiment of the present invention. Specific implementation manners

[0041] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0042] It should be clear that the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0043] Embodiment 1

[0044] Referring to Figures 1 to 9 As shown, the hole-sealing device provided by the embodiment of the present invention is mainly used for hole-sealing of the drill hole 100 provided with the anchor rod or cable 110 in the water-containing area of underground engineering such as mine roadways, tunnels or subway side channels, etc., for anchor cable or bolt support.

[0045] The device includes a positioning push rod and a hole-sealing positioning piece. The positioning push rod includes a positioning rod 1, a fixed ring 2 and a handle 3. The hole-sealing positioning piece includes a positioning grout-stop upper piece 4, a positioning connecting piece 5 and a positioning grout-stop lower piece 6;

[0046] The handle 3 has a cylindrical structure and is used to provide thrust and control the depth of the positioning push rod. At one end of the cylindrical structure, a plurality of the positioning rods 1 are axially provided. The plurality of positioning rods 1 enclose a cylindrical space along the circumferential direction of the handle 3. The fixing ring 2 is provided with a clamping through hole, and the plurality of positioning rods 1 are respectively fixed by passing through the clamping through holes of the fixing ring 2.

[0047] A plurality of anti-check parts 7 protruding transversely are provided at intervals along the length direction on the positioning rod 1. In some embodiments, the protruding anti-check parts 7 are barbed protrusions or wedge-shaped protrusions. The positioning anti-grouting upper sheet 4, the positioning connection sheet 5 and the positioning anti-grouting lower sheet 6 are respectively circular sheet structures. The positioning anti-grouting upper sheet 4 has a blind hole 41, and the positioning connection sheet 5 and the positioning anti-grouting lower sheet 6 respectively have through holes 51. The positioning anti-grouting upper sheet 4, the positioning connection sheet 5 and the positioning anti-grouting lower sheet 6 are sequentially installed on the positioning rod 1 from top to bottom.

[0048] In some embodiments, the blind hole and the through hole are oval or circular, and the cross section of the positioning rod 1 is arc-shaped or circular. The inner diameter dimensions of the respective component sheets of the hole-sealing positioning sheet are slightly smaller than the inner diameter of the cylindrical space formed by the plurality of positioning rods 1, and the outer diameter dimensions are slightly larger than the diameter of the drilling hole 100, so as to realize the sealing of the drilling hole 100.

[0049] Among them, the positioning connection sheet 5 and the positioning anti-grouting lower sheet 6 are sleeved on the positioning rod 1 through the through holes 51, and the lower surface presses on the anti-check part 7, and the positioning anti-grouting upper sheet 4 is buckled on the upper end of the positioning rod 1 through the blind hole 41.

[0050] Grouting pipe positioning through holes 8 are respectively provided corresponding to the fixing ring 2, the positioning anti-grouting upper sheet 4, the positioning connection sheet 5 and the positioning anti-grouting lower sheet 6. Plugging pipe positioning through holes 9 at corresponding positions are respectively further provided on the fixing ring 2, the positioning connection sheet 5 and the positioning anti-grouting lower sheet 6. A grouting pipe 10 is inserted into the grouting pipe positioning through hole 8, and a plugging pipe 11 for injecting an expansion plugging material into the drilling hole 100 is inserted into the plugging pipe positioning through hole 9. In this way, after the hole-sealing positioning sheet seals the drilling hole 100, it is convenient to realize the grouting reinforcement hole-sealing construction.

[0051] A hole-sealing device provided by an embodiment of the present invention includes: a positioning push rod and a hole-sealing positioning sheet. After the drilling hole 100 is completed and an anchor rod is inserted to form an annular space, the positioning push rod and the hole-sealing positioning sheet thereon are pushed into the drilling hole 100, and then the positioning push rod is pulled out, and the plugging link of the hole-sealing construction in the annular space, that is, the drilling hole 100 can be simply and quickly plugged. Further, by injecting grout and an expansion material into the annular space through the grouting pipe and the plugging pipe, the hole-sealing construction of the annular space can be more conveniently completed.

[0052] Based on the plugging device provided by the embodiments of the present invention, a plugging method is also provided, which is applied to the plugging of an annular space and includes the following steps:

[0053] 110. After completing the drilling 100, insert the bolt into the drilling 100 and anchor it in the drilling 100 with an anchoring agent to form an annular space between the bolt and the drilling 100.

[0054] 120. Install the positioning grout stop lower piece 6, the positioning connection piece 5, and the grout stop positioning upper piece onto the positioning rod 1 of the positioning push rod in sequence, insert the grouting pipe into the grouting pipe positioning through holes 8 on the fixing ring 2 and the plugging hole positioning piece in sequence, insert the plugging pipe into the plugging pipe positioning through holes on the fixing ring 2 and the plugging hole positioning piece, and fix them to form the overall plugging device.

[0055] 130. Align the cylindrical space formed by multiple positioning rods 1 and sleeved on the bolt, and position the positioning rod 1 by using the cooperation between the bolt and the cylindrical space.

[0056] 140. Slowly push the positioning rod 1 into the annular space and reach the predetermined design position.

[0057] 150. Loosen the grouting pipe and the plugging pipe fixed on the positioning push rod, pull out the positioning push rod from the annular space, and the remaining components form a plugging structure in the drilling 100.

[0058] 160. Inject an expansion plugging material through the plugging pipe. After the expansion plugging material expands and fills the plugging section of the annular space and solidifies, the plugging of the annular space is completed.

[0059] In this way, based on the plugging device, the plugging link of the drilling 100 in the plugging construction of the annular space can be simply and quickly completed. Further, by injecting grout and expansion material into the annular space through the grouting pipe and the plugging pipe, the plugging construction of the annular space can be conveniently completed.

[0060] Among them, the plugging material can be a high-strength expansion plugging material, or it can be a mixed material of first injecting a high-strength material and then injecting an expansible material.

[0061] The high-strength expansion plugging material includes polymer organic materials such as polyurethane materials and epoxy resin materials, and inorganic materials such as leak stoppage king and expansive cement.

[0062] The high-strength material refers to inorganic materials with low expansion or shrinkage, such as ordinary cement materials, and the expansion materials include polymer organic materials such as unsaturated polyester resin and epoxy resin.

[0063] In some embodiments, the method further includes: after the expansion plugging material expands and fills the plugging section of the annular space and solidifies, injecting grouting material into the part from the plugging section of the annular space to the bottom of the hole through the grouting pipe, so as to grout and reinforce the surrounding rock around the borehole 100.

[0064] Specifically, when grouting through the grouting pipe, first inject thin cement slurry, then inject thick cement slurry, and finally inject expansive material to make up for the space of the hardened shrinkage of the cementitious grouting material, ensure the compactness of the solidified material after grouting in the annular space, improve the tensile performance of the bolt support body, and realize plugging the water in the borehole 100.

[0065] In some embodiments of the present invention, the positioning and grout-stopping upper piece 4 includes a plurality of blind holes for buckling on the top end of the positioning rod 1; the positioning connecting piece 5 and the positioning and grout-stopping lower piece 6 respectively include a plurality of through holes for passing through the positioning rod 1.

[0066] The circumferential surfaces of the positioning and grout-stopping upper piece 4, the positioning connecting piece 5, and the positioning and grout-stopping lower piece 6 respectively also have barbed protrusions or wedge-shaped protrusions 52 for propping against the inner wall of the borehole 100 to prevent sliding down in the borehole 100.

[0067] In this embodiment, the plugging method further includes: during the process of pulling out the positioning push rod from the annular space, using the barbed protrusions or wedge-shaped protrusions on each component of the plugging positioning piece to prop against the inner wall of the borehole 100 to prevent the plugging positioning piece from sliding out of the borehole 100 along with the push rod, which is convenient for positioning the plugging positioning piece.

[0068] In some other embodiments, a clamp 21 for clamping the grouting pipe and the plugging pipe is provided on the fixing ring 2. The clamp 21 can specifically be a wire clamp or a hose clamp, or can also be directly wound and tightened with iron wire.

[0069] In this embodiment, the plugging method further includes: after inserting the grouting pipe into the positioning through hole and inserting the plugging pipe into the plugging pipe positioning through hole, using the clamp 21 on the fixing ring 2 to clamp the grouting pipe and the plugging pipe to be fixed as a whole with the positioning push rod.

[0070] Loosening the grouting pipe and the plugging pipe fixed on the positioning push rod means: loosening the clamp 21 to separate the grouting pipe and the plugging pipe from the positioning push rod.

[0071] In some embodiments, the positioning rod 1 is provided with size scales, which is convenient for construction personnel to control the pushing depth of the positioning rod 1.

[0072] The positioning rod 1 can be butt-jointed and assembled according to different design depth requirements and is composed of a plurality of positioning rods 1. The top end of the positioning rod 1 is ground flat or round to prevent penetrating the positioning and grout-stopping upper piece 4 during the process of being pushed into the borehole 100.

[0073] See Figure 10 As shown, the hole plugging positioning piece and the positioning push rod are of a cylindrical integral structure, specifically including a positioning grout-stop upper piece 4, a positioning connecting piece 5, a positioning grout-stop lower piece 6 and multiple positioning push rods 1. Next, the plugging pipe and the grouting pipe are inserted into the cylindrical integral structure, and after being fixed by a gripper to form a whole, they are directly pushed into the annular space.

[0074] Alternatively, the hole plugging positioning piece, the positioning push rod, the plugging pipe and the grouting pipe are combined into a cylindrical integral structure, specifically including a positioning grout-stop upper piece 4, a positioning connecting piece 5, a positioning grout-stop lower piece 6, multiple positioning push rods 1, a plugging pipe and a grouting pipe, and are directly pushed into the annular space. As an alternative embodiment, the hole plugging positioning piece may also only include a positioning grout-stop upper piece 4 and a grout-stop positioning lower piece, and the positioning push rod is a pipe with a longitudinal slit for communicating the upper and lower spaces in the drilling hole 100 that divides the positioning grout-stop upper piece 4.

[0075] The positioning grout-stop upper piece 4 includes a grouting pipe positioning through hole 8 through which the grouting pipe passes and is pushed into a predetermined design position by the positioning push rod. The positioning grout-stop lower piece 6 includes a grouting pipe positioning through hole 8 and a plugging pipe positioning through hole 9 through which the grouting pipe and the plugging pipe pass or through which the grouting pipe passes, and is pushed to a predetermined design position by the positioning push rod.

[0076] During the process of injecting grouting material into the drilling hole 100 through the grouting pipe, the slit of the positioning push rod is used to enable the grouting material to flow in the upper and lower spaces divided by the positioning grout-stop upper piece 4, so as to realize the grouting reinforcement of the annular space in the drilling hole 100, and the expansion plugging material is injected through the plugging pipe to complete the hole plugging.

[0077] It should be noted that in this article, terms indicating the orientation or positional relationship such as "upper" and "lower" are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present invention. Unless otherwise clearly specified and defined, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium. Relationship terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising one..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the element. Those of ordinary skill in the art can understand through specific circumstances.

[0078] As described above, the above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A hole-sealing method, characterized in that, Implemented based on a hole-sealing device, the hole-sealing device includes: a positioning push rod and a hole-sealing positioning piece. The positioning push rod includes a positioning rod, a fixing ring, and a handle. The hole-sealing positioning piece includes a positioning slurry-stop upper piece, a positioning connecting piece, and a positioning slurry-stop lower piece; The handle is a cylindrical structure. At one end of the cylindrical structure, multiple positioning rods are axially provided. The multiple positioning rods surround a cylindrical space along the circumferential direction of the handle. The fixing ring is provided with a clamping through hole, and the multiple positioning rods are respectively fixed by passing through the clamping through holes of the fixing ring; Multiple anti-backflow parts protruding transversely are provided at intervals along the length direction on the positioning rod. The positioning slurry-stop upper piece, the positioning connecting piece, and the positioning slurry-stop lower piece are respectively circular sheet-like structures. The positioning slurry-stop upper piece has a blind hole, and through holes are respectively provided on the positioning connecting piece and the positioning slurry-stop lower piece. The positioning slurry-stop upper piece, the positioning connecting piece, and the positioning slurry-stop lower piece are sequentially installed on the positioning rod from top to bottom; Among them, the positioning connecting piece and the positioning slurry-stop lower piece are sleeved on the positioning rod through the through holes, and the lower surface presses on the anti-backflow part. The positioning slurry-stop upper piece is buckled on the upper end of the positioning rod through the blind hole; Grouting pipe positioning through holes are respectively provided corresponding to the fixing ring, the positioning slurry-stop upper piece, the positioning connecting piece, and the positioning slurry-stop lower piece. Plugging pipe positioning through holes at corresponding positions are also respectively provided on the fixing ring, the positioning connecting piece, and the positioning slurry-stop lower piece; A grouting pipe is inserted into the grouting pipe positioning through hole, and a plugging pipe for injecting an expansion plugging material into the drill hole is inserted into the plugging pipe positioning through hole; The method is applied to the plugging of an annular space and includes the steps: After the drill hole is completed, insert an anchor rod into the drill hole and anchor it in the drill hole with an anchoring agent to form an annular space between the anchor rod and the drill hole; Install the positioning slurry-stop lower piece, the positioning connecting piece, and the slurry-stop positioning upper piece onto the positioning rod of the positioning push rod in sequence, insert the grouting pipe into the grouting pipe positioning through holes on the fixing ring and the hole-sealing positioning piece in sequence, insert the plugging pipe into the plugging pipe positioning through holes on the fixing ring and the hole-sealing positioning piece, and fix to form the whole hole-sealing device; Align the cylindrical space formed by the multiple positioning rods and sleeved on the anchor rod, and use the cooperation between the anchor rod and the cylindrical space to position the positioning rod; Slowly push the positioning rod into the annular space and reach the predetermined design position; Loosen the grouting pipe and the plugging pipe fixed on the positioning push rod, pull out the positioning push rod from the annular space, and the remaining components form a hole-sealing structure in the drill hole; Inject an expansion plugging material through the plugging pipe. After the expansion plugging material expands and fills the hole-sealing section of the annular space and solidifies, the plugging of the annular space is completed.

2. The hole sealing method according to claim 1, wherein The method further includes: after the expansion plugging material expands and fills the hole-sealing section of the annular space and solidifies, inject a grouting material into the part from the hole-sealing section of the annular space to the bottom of the hole through the grouting pipe to grout and reinforce the surrounding rock of the drill hole.

3. The hole-sealing method according to claim 2, characterized in that, When grouting through the grouting pipe, first inject thin cement slurry, then inject thick cement slurry, and finally inject expansive materials to make up for the space for the hardening shrinkage of the cementitious grouting material, ensure the compactness of the solidified material after grouting in the annular space, improve the tensile performance of the bolt support body, and achieve the sealing of the drilling water.

4. The hole-sealing method according to claim 1, characterized in that, A gripper is provided on the fixing ring; After inserting the grouting pipe into the positioning through hole and inserting the plugging pipe into the plugging pipe positioning through hole, use the gripper on the fixing ring to grip the grouting pipe and the plugging pipe to be fixed as a whole with the positioning push rod; Loosening the grouting pipe and the plugging pipe fixed on the positioning push rod means: loosening the gripper to separate the grouting pipe and the plugging pipe from the positioning push rod.

5. The hole sealing method according to claim 1, characterized in that, The circumferential surfaces of the positioning anti-grouting upper piece, the positioning connecting piece, and the positioning anti-grouting lower piece of the hole-sealing positioning piece also respectively have barbed protrusions or wedge-shaped protrusions; During the process of pulling out the positioning push rod from the annular space, use the barbed protrusions or wedge-shaped protrusions on each component of the hole-sealing positioning piece to abut against the inner wall of the drilling hole to prevent the hole-sealing positioning piece from sliding out of the drilling hole along with the push rod.

6. The hole sealing method according to claim 4, characterized in that, The gripper is a wire clamp or a clamp; 7. The plugging method according to claim 1, characterized in that, The blind hole and the through hole are oval or circular, and the cross section of the positioning rod is arc-shaped or circular.

Images