CN113107561B - Self-drilling type combined grouting anchor rod with grout stop plug and suitable for soft rock stratum - Google Patents
Self-drilling type combined grouting anchor rod with grout stop plug and suitable for soft rock stratum Download PDFInfo
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- CN113107561B CN113107561B CN202110571346.7A CN202110571346A CN113107561B CN 113107561 B CN113107561 B CN 113107561B CN 202110571346 A CN202110571346 A CN 202110571346A CN 113107561 B CN113107561 B CN 113107561B
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- grouting
- anchor rod
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- pipe
- grout
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- 239000011440 grout Substances 0.000 title claims abstract description 89
- 239000011435 rock Substances 0.000 title claims abstract description 35
- 238000005553 drilling Methods 0.000 title claims abstract description 33
- 230000008093 supporting effect Effects 0.000 claims abstract description 62
- 238000007789 sealing Methods 0.000 claims abstract description 17
- 238000005096 rolling process Methods 0.000 claims description 43
- 238000000034 method Methods 0.000 claims description 8
- 238000007569 slipcasting Methods 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 5
- 238000003825 pressing Methods 0.000 claims description 5
- 238000005336 cracking Methods 0.000 claims description 3
- 230000005670 electromagnetic radiation Effects 0.000 claims description 3
- 238000004873 anchoring Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 2
- 239000011324 bead Substances 0.000 description 15
- 239000002002 slurry Substances 0.000 description 4
- 238000009434 installation Methods 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Images
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/003—Machines for drilling anchor holes and setting anchor bolts
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/02—Setting anchoring-bolts with provisions for grouting
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/0026—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/0086—Bearing plates
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention belongs to the technical field of geotechnical engineering anchoring, in particular to a self-drilling type combined grouting anchor rod with a grout stop plug, which is suitable for soft rock stratum, and comprises a grouting anchor rod body, a drill bit arranged at the top end of the grouting anchor rod body and an expansion rubber grout stop pipe arranged at the tail part of the grouting anchor rod body, wherein a grouting cavity is formed in the grouting anchor rod body, the grouting cavity is internally connected with the grouting pipe, an outer grout stop mechanism is arranged at one end, far away from the drill bit, of the grouting anchor rod body, a supporting mechanism is arranged at one side of the outer grout stop mechanism, the anchor rod is drilled into a rock stratum through the arranged grouting anchor rod body matched with the drill bit, then the expansion rubber grout stop pipe and the grouting cavity are matched, the grouting anchor rod body is not required to be pulled out, hole sealing and grouting are directly carried out, the grouting pipe is prevented from being difficult to drop caused by secondary collapse in a drilled hole, and the arranged outer grout stop mechanism is matched with the supporting mechanism, when the surrounding rock where the drill hole is located is high in crushing degree and cracks are numerous, the drill hole is well sealed, high grouting pressure is guaranteed, and the anchoring effect is guaranteed.
Description
Technical Field
The invention belongs to the technical field of geotechnical engineering anchoring, and particularly relates to a self-drilling combined grouting anchor rod with a grout stop plug, which is suitable for soft rock strata.
Background
Geotechnical engineering anchoring is used for complicated geology of weak surrounding rock, fault broken zone, high ground stress deformation and the like in engineering, particularly when a hole collapse is serious and surrounding rock faults are deep, grouting anchor rod reinforcement is a main supporting technology for reinforcing the stratum to prevent stratum deformation collapse or instability to endanger safety, the stratum is reinforced by the high-strength tensile capacity of an anchor rod arranged in the stratum and the modes of tightly combining grouting bodies around the anchor rod and the stratum, and in terms of a grouting anchor rod supporting process, high grouting pressure can ensure that grout generates a large diffusion range in a broken rock body, good surrounding rock reinforcement supporting effect is achieved, grouting pressure is increased, higher requirements are put forward for a grout stopping system, the good grout stopping system can effectively plug a hole opening of a drilling hole of the anchor rod, and grouting pressure in the drilling hole is improved, the present common type grout stopping plug is mostly a round platform type rubber grout stopping plug or a round platform type hard plastic grout stopping plug, the deformation range of the grout stopping plug is limited in the actual use process of the common type grout stopping plug, the extruding capability to the anchor rod and the wall of a drill hole is limited, the effective plugging of a higher grouting pressure hole cannot be realized, when the surrounding rock where the drill hole is located is a rock stratum which is high in breaking degree and easy to collapse, the drill hole is not easy to form, a gap is easy to form between the outer edge of the grout stopping plug and the wall of the drill hole, the grout stopping plug cannot ensure good air tightness during the grouting of the anchor rod, grout can overflow in the grouting process, grout leakage and grout spraying are avoided, the grout pressure in the drill hole cannot reach a design value, and the grouting supporting effect is greatly influenced.
Disclosure of Invention
To solve the problems set forth in the background art described above. The invention provides a self-drilling combined grouting anchor rod with a grout stop plug, which is suitable for soft rock strata and has the characteristics of direct hole sealing and grouting without pulling out a grouting anchor rod body and good drilling air tightness.
In order to achieve the purpose, the invention provides the following technical scheme: a self-drilling combined grouting anchor rod with a grouting stop plug suitable for soft rock stratum comprises at least one grouting anchor rod body, a drill bit and an expansion rubber grouting stop pipe, wherein the drill bit is installed at the top end of the grouting anchor rod body;
the outer grout stopping mechanism comprises an elastic grout stopping pad, a support plate, a first support column, a first support sleeve, a mounting seat, a support cavity, a support rolling ring and a rolling seal ring, wherein a grout stopping pad placing groove is formed around the wall surface where the grouting anchor rod body is located, the elastic grout stopping pad is installed in the grout stopping pad placing groove, the support plate is installed on one side, away from the grouting anchor rod body, of the elastic grout stopping pad, the support plate is installed around the grouting pipe and is provided with the mounting seat, the rolling seal ring installing groove is formed in the mounting seat, a plurality of support cavities are formed in the rolling seal ring installing groove, the rolling seal ring is installed in the rolling seal ring installing groove, the support rolling ring is installed in the support cavities and is in interference fit with the rolling seal ring, and a plurality of first support columns are installed on one side, away from the elastic grout stopping pad, of the support plates, the one end that first support column kept away from the thick liquid pad is only stopped to elasticity is installed first support sleeve, the slip casting pipe passes first support sleeve.
Preferably, supporting mechanism, including bottom plate, weight piece, pivot, second bracing piece, bearing rope, second supporting sleeve and elastic sleeve pad down, install the one end of bottom plate the weight piece pushes down, the other end of bottom plate is passed through the pivot is installed the second bracing piece, the second bracing piece is kept away from the one end of pivot is installed the second supporting sleeve, install one side of second supporting sleeve the elastic sleeve pad, the slip casting pipe passes the second supporting sleeve with the elastic sleeve pad, the elastic sleeve pad with first supporting sleeve contacts, the second bracing piece is close to the position of second supporting sleeve is installed the bearing rope, the bearing rope is kept away from the one end of second bracing piece with the bearing rope is connected.
Preferably, a plurality of rotating bead mounting grooves are formed in the wall of the supporting cavity, supporting rotating beads are mounted inside the rotating bead mounting grooves, and the supporting rotating beads are in interference fit with the supporting rolling rings.
Preferably, the elastic grout stop pad comprises an elastic layer and a soft stop layer, and the elastic layer is preferably close to the support plate.
Preferably, a plurality of triangular supports are installed on the outer wall of the grouting anchor rod body.
Preferably, the rolling seal ring is made of rubber.
Preferably, the device comprises the following steps:
a: detecting the cracking and breaking condition of surrounding rock to be supported by an electromagnetic radiation method, and determining the support density of the anchor rod;
b: after the step A is finished, determining the position of an anchor rod, digging a grout stop pad placing groove around a drilling point, well combining the anchor rod and drilling the anchor rod into surrounding rock to be supported, inserting a pipe wall check ball and an expanded rubber grout stop pipe into a drilled hole along a grouting anchor rod body after the completion of the drilling, and then expanding the expanded rubber grout stop pipe to block the drilled hole;
c: after the step B is finished, connecting the grouting pipe and the grouting cavity together, placing the elastic grout stopping pad into the grout stopping pad placing groove, and putting down the lower pressing weight to enable the elastic grout stopping pad to be tightly attached to the grout stopping pad placing groove;
d: and C, after the step C is finished, starting pressurizing grouting, after the requirement is met, continuously grouting, slowly drawing out the grouting pipe, sealing the grouting cavity, and finishing grouting.
Compared with the prior art, the invention has the beneficial effects that:
1. the anchor rod is drilled into a rock stratum through the arranged grouting anchor rod body matched with the drill bit, and then the expansion rubber grout stopping pipe and the pipe wall check ball are matched, so that the grouting anchor rod body is not required to be pulled out, hole sealing and grouting are directly performed, and the problem that the grouting pipe is difficult to lower due to re-collapse in a drilled hole after drilling is avoided;
2. stop thick liquid mechanism and supporting mechanism through the outside that sets up and cooperate, it is higher when the broken degree of drilling place country rock, when the crack is more, fine sealed with drilling, guarantee higher slip casting pressure, the anchor effect obtains guaranteeing.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of an outer slurry stopping mechanism according to the present invention;
FIG. 3 is a schematic structural view of part A of the present invention;
FIG. 4 is a schematic structural view of a supporting rotary bead and a rotary bead mounting groove according to the present invention;
FIG. 5 is a schematic structural view of a support mechanism according to the present invention;
FIG. 6 is a schematic view of the structure of the elastic grout stop pad of the present invention.
In the figure: 1. grouting the anchor rod body; 11. a grouting cavity; 12. drilling; 2. a drill bit; 3. expanding a rubber grout stopping pipe; 4. a grouting pipe; 5. a pipe wall check ball; 6. an adjustable pressure-bearing valve plate; 7. a triangular support frame; 8. an outer slurry stopping mechanism; 81. a pulp stopping pad placing groove; 82. an elastic grout stop pad; 821. an elastic layer; 822. a soft stop layer; 83. a support plate; 84. a first support column; 85. a first support sleeve; 86. a mounting seat; 87. a support cavity; 871. supporting the rotating beads; 872. a rotary bead mounting groove; 88. supporting the rolling ring; 89. a rolling seal ring; 891. a rolling seal ring mounting groove; 9. a support mechanism; 91. a base plate; 92. pressing down the weight block; 93. a rotating shaft; 94. a second support bar; 95. a load-bearing rope; 96. a second support sleeve; 97. an elastic sleeve cushion.
Detailed Description
The materials, methods and apparatus used in the following examples, which are not specifically illustrated, are conventional in the art and are commercially available to those of ordinary skill in the art.
In the following description of the present invention, it is to be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "top", "bottom", "inner", "outer" and "upright", etc., indicate orientations and positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the following description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; the connection may be direct or indirect via an intermediate medium, and the connection may be internal to the two components. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, in the following description of the present invention, the meaning of "plurality", and "plural" is two or more unless otherwise specified.
The present invention will be further described with reference to the following detailed description, wherein the drawings are for illustrative purposes only and are not intended to be limiting, wherein certain elements may be omitted, enlarged or reduced in size, and are not intended to represent the actual dimensions of the product, so as to better illustrate the detailed description of the invention.
Referring to fig. 1-6, the present invention provides the following technical solutions: a self-drilling combined grouting anchor rod with a grout stop plug suitable for soft rock stratum comprises at least one grouting anchor rod body 1, a drill bit 2 installed at the top end of the grouting anchor rod body 1 and an expansion rubber grout stop pipe 3 installed at the tail part of the grouting anchor rod body 1, a grouting cavity 11 is formed in the grouting anchor rod body 1, a grouting pipe 4 is connected into the grouting cavity 11, an adjustable pressure-bearing valve plate 6 is installed at the top end, located in the grouting cavity 11, of the grouting pipe 4, a pipe wall check ball 5 is installed at the position, located in the expansion rubber grout stop pipe 3, of the outer wall of the grouting anchor rod body 1, an outer grout stop mechanism 8 is installed at one end, far away from the drill bit 2, of the grouting anchor rod body 1, and a supporting mechanism 9 is installed at one side, far away from the grouting anchor rod body 1, of the outer grout stop mechanism 8;
the outer grout stopping mechanism 8 comprises an elastic grout stopping pad 82, a support plate 83, a first support column 84, a first support sleeve 85, a mounting seat 86, support cavities 87, support rolling rings 88 and rolling sealing rings 89, wherein a grout stopping pad placing groove 81 is formed in the periphery of a wall surface where a grouting anchor rod body 1 is located, the elastic grout stopping pad 82 is installed in the grout stopping pad placing groove 81, the support plate 83 is installed on one side, far away from the grouting anchor rod body 1, of the elastic grout stopping pad 82, the support plate 83 is installed on the side, around a grouting pipe 4, of the mounting seat 86, a rolling sealing ring installing groove 891 is formed in the mounting seat 86, a plurality of support cavities 87 are formed in the rolling sealing ring installing groove 891, the rolling sealing rings 89 are installed in the rolling sealing ring installing groove 891, the support rolling rings 88 are installed in the support cavities 87, the support rolling rings 88 are in interference fit with the rolling sealing rings 89, a plurality of first support columns 84 are installed on one side, far away from the elastic grout stopping pad 82, of the support plate 83, the end of the first support column 84 away from the elastic grout stop pad 82 is provided with a first support sleeve 85, and the grouting pipe 4 passes through the first support sleeve 85.
In this embodiment: the grouting anchor rod body 1 with the grouting cavity 11 inside, a drill bit 2 installed at the top end of the grouting anchor rod body 1 and an expansion rubber grout stopping pipe 3 installed at the tail part of the grouting anchor rod body 1 are combined together, the anchor rod does not need to be taken out after drilling, secondary collapse after the drilling 12 is finished is avoided, the grouting pipe 4 is difficult to put down, after the drilling is finished, the grouting cavity 11 is connected with the grouting pipe 4, the expansion rubber grout stopping pipe 3 is expanded to stop the drilling 12 and directly perform grouting, an adjustable pressure-bearing valve plate 6 installed at the top end of the grouting pipe 4 is matched to ensure grouting pressure and a pipe wall check ball 5 installed on the outer wall of the grouting anchor rod body 1 to stop mortar from leaking, high-pressure grouting is realized, in order to avoid rock stratum cracks from influencing the grouting pressure, an outer side grout stopping mechanism 8 is tightly pressed on the rock wall around the drilling 12 by using a supporting mechanism 9 to stop rock stratum cracks;
in the later stage of grouting, the grouting pipe 4 needs to be pulled out while the grouting pressure is ensured, the rolling sealing ring 89 is tightly attached to the grouting pipe 4 for sealing, and along with the pulling-out rolling of the grouting pipe 4, the supporting rolling ring 88 rolls along with the rolling and drives the supporting rotating bead 871 to roll, so that the grouting pipe 4 is easily pulled out while the pressure is ensured, and the grouting is completed.
In this embodiment, as shown in fig. 5, the supporting mechanism 9 includes a bottom plate 91, a downward weight 92, a rotating shaft 93, a second supporting rod 94, a bearing rope 95, a second supporting sleeve 96 and an elastic sleeve pad 97, the downward weight 92 is installed at one end of the bottom plate 91, the second supporting rod 94 is installed at the other end of the bottom plate 91 through the rotating shaft 93, the second supporting sleeve 96 is installed at one end of the second supporting rod 94 away from the rotating shaft 93, the elastic sleeve pad 97 is installed at one side of the second supporting sleeve 96, the grouting pipe 4 passes through the second supporting sleeve 96 and the elastic sleeve pad 97, the elastic sleeve pad 97 is in contact with the first supporting sleeve 85, the bearing rope 95 is installed at a position of the second supporting sleeve 94 close to the second supporting sleeve 96, and one end of the bearing rope 95 away from the second supporting rod 94 is connected with the bearing rope 95; the elastic sleeve gasket 97 is close to the first supporting sleeve 85, the lower weight pressing block 92 is pressed on the bottom plate 91, the bearing rope 95 pulls the second supporting rod 94 downwards, and the elastic sleeve gasket 97 is driven to tightly press the outer-side grout stopping mechanism 8 in the grout stopping gasket placing groove 81.
In this embodiment, as shown in fig. 3, a plurality of rotating bead installation grooves 872 are formed in the cavity wall of the support cavity 87, a support rotating bead 871 is installed inside the rotating bead installation groove 872, and the support rotating bead 871 is in interference fit with the support rolling ring 88; when the support rolling ring 88 rolls, the support rolling bead 871 rolls along with the support rolling bead, and the grouting pipe 4 is easier to pull out.
In this embodiment, as shown in fig. 6, the elastic slurry stop pad 82 includes an elastic layer 821 and a soft stop layer 822, the elastic layer 821 is adjacent to the support plate 83; the elastic layer 821 can tightly press the soft preventing layer 822 in the slurry stop pad placing groove 81, and meanwhile, the soft preventing layer 822 can extend into a rock stratum crack to ensure the pressure during grouting.
In the present embodiment, as shown in fig. 1, a plurality of triangular supports 7 are installed on the outer wall of the grouting anchor rod body 1; the triangular support frame 7 plays a supporting role, and the grouting anchor rod body 1 is prevented from being inclined during grouting.
In the present embodiment, as shown in fig. 3, the rolling seal ring 89 is made of rubber; the rolling seal 89 made of rubber has better sealing properties.
The working principle and the using process of the invention are as follows: detecting the cracking and breaking condition of the surrounding rock to be supported by an electromagnetic radiation method, determining the support density of the anchor rod, determining the position of the anchor rod, digging a grout stop pad placing groove 81 around the drilling point, drilling the anchor rod assembly into the surrounding rock to be supported, after the grouting, the pipe wall check ball 5 and the expansion rubber check pipe 3 are inserted into the drill hole 12 along the grouting anchor rod body 1, then, the expanded rubber grout stopping pipe 3 is expanded to block the drilled hole 12, the grouting pipe 4 and the grouting cavity 11 are connected together, the elastic grout stopping pad 82 is placed in the grout stopping pad placing groove 81, the lower pressing weight 92 is put down to ensure that the elastic grout stop pad 82 is tightly attached to the grout stop pad placing groove 81, the soft stop layer 822 can extend into the rock stratum crack to ensure the pressure during grouting, pressurized grouting is started, and after the requirements are met, and (5) slowly drawing out the grouting pipe 4 while continuing grouting, and sealing the grouting cavity 11 to finish grouting.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (7)
1. The utility model provides a from drilling formula area grout stop plug combination slip casting stock suitable for soft rock stratum, includes an at least slip casting stock body (1), install in drill bit (2) on slip casting stock body (1) top with install in the inflation rubber of slip casting stock body (1) afterbody ends thick liquid pipe (3), its characterized in that: a grouting cavity (11) is formed in the grouting anchor rod body (1), a grouting pipe (4) is connected to the inside of the grouting cavity (11), an adjustable pressure-bearing valve plate (6) is installed at the top end, located in the grouting cavity (11), of the grouting pipe (4), a pipe wall check ball (5) is installed at the position, located in the expansion rubber check pipe (3), of the outer wall of the grouting anchor rod body (1), an outer side grout stopping mechanism (8) is installed at one end, far away from the drill bit (2), of the grouting anchor rod body (1), and a supporting mechanism (9) is installed at one side, far away from the grouting anchor rod body (1), of the outer side grout stopping mechanism (8);
the outer-side grout stopping mechanism (8) comprises an elastic grout stopping pad (82), a supporting plate (83), a first supporting column (84), a first supporting sleeve (85), a mounting seat (86), a supporting cavity (87), a supporting rolling ring (88) and a rolling sealing ring (89), a grout stopping pad placing groove (81) is formed around the wall where the grouting anchor rod body (1) is located, the elastic grout stopping pad (82) is installed in the grout stopping pad placing groove (81), the supporting plate (83) is installed on one side, away from the grouting anchor rod body (1), of the elastic grout stopping pad (82), the mounting seat (86) is installed around the grouting pipe (4) through the supporting plate (83), the rolling sealing ring installing groove (891) is formed inside the mounting seat (86), and a plurality of supporting cavities (87) are formed around the rolling sealing ring installing groove (891), the internally mounted of rolling seal circle mounting groove (891) has rolling seal circle (89), the internally mounted of supporting chamber (87) has support rolling circle (88), support rolling circle (88) with rolling seal circle (89) interference fit, it keeps away from to support pull (83) a plurality of is installed to one side that thick liquid pad (82) was only to elasticity first support column (84), keep away from first support column (84) the one end that thick liquid pad (82) was only to elasticity is installed first support sleeve (85), slip casting pipe (4) are passed first support sleeve (85).
2. The self-drilling combined grouting anchor rod with the grout stop plugs suitable for the soft rock stratum as claimed in claim 1, wherein: the supporting mechanism (9) comprises a bottom plate (91), a lower weight block (92), a rotating shaft (93), a second supporting rod (94), a bearing rope (95), a second supporting sleeve (96) and an elastic sleeve gasket (97), wherein the lower weight block (92) is installed at one end of the bottom plate (91), the second supporting rod (94) is installed at the other end of the bottom plate (91) through the rotating shaft (93), the second supporting sleeve (96) is installed at one end, away from the rotating shaft (93), of the second supporting rod (94), the elastic sleeve gasket (97) is installed at one side of the second supporting sleeve (96), the grouting pipe (4) penetrates through the second supporting sleeve (96) and the elastic sleeve gasket (97), the elastic sleeve gasket (97) is in contact with the first supporting sleeve (85), and the bearing rope (95) is installed at the position, close to the second supporting sleeve (96), of the second supporting rod (94), one end, far away from the second supporting rod (94), of the bearing rope (95) is connected with the bearing rope (95).
3. The self-drilling combined grouting anchor rod with the grout stop plugs suitable for the soft rock stratum as claimed in claim 1, wherein: support the intracavity wall of chamber (87) and seted up a plurality of and changeed pearl mounting groove (872), the internally mounted who changes pearl mounting groove (872) has the support to change pearl (871), support change pearl (871) with support rolling circle (881) interference fit.
4. The self-drilling combined grouting anchor rod with the grout stop plugs suitable for the soft rock stratum as claimed in claim 1, wherein: the elastic pulp stop pad (82) comprises an elastic layer (821) and a soft stopping layer (822), and the elastic layer (821) is close to the support plate (83).
5. The self-drilling combined grouting anchor rod with the grout stop plugs suitable for the soft rock stratum as claimed in claim 1, wherein: and the outer wall of the grouting anchor rod body (1) is provided with a plurality of triangular support frames (7).
6. The self-drilling combined grouting anchor rod with the grout stop plugs suitable for the soft rock stratum as claimed in claim 1, wherein: the rolling seal ring (89) is made of rubber.
7. The self-drilling combined grouting anchor rod with the grout stop plugs suitable for the soft rock stratum as claimed in claim 1, wherein:
the device comprises the following steps:
a: detecting the cracking and breaking condition of surrounding rock to be supported by an electromagnetic radiation method, and determining the support density of the anchor rod;
b: after the step A is finished, determining the position of an anchor rod, digging a grout stop pad placing groove (81) around a drilling point, well combining the anchor rod and drilling the anchor rod into the surrounding rock to be supported, inserting a pipe wall check ball (5) and an expanded rubber grout stop pipe (3) into a drill hole (12) along a grouting anchor rod body (1), and then expanding the expanded rubber grout stop pipe (3) to block the drill hole (12);
c: after the step B is finished, the grouting pipe (4) is connected with the grouting cavity (11), the elastic grout stopping pad (82) is placed into the grout stopping pad placing groove (81), and the lower pressing weight block (92) is put down to enable the elastic grout stopping pad (82) to be tightly attached to the grout stopping pad placing groove (81);
d: and C, after the step C is finished, pressurizing and grouting are started, after the requirement is met, the grouting pipe (4) is slowly drawn out while grouting is continued, the grouting cavity (11) is closed, and grouting is finished.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110571346.7A CN113107561B (en) | 2021-05-25 | 2021-05-25 | Self-drilling type combined grouting anchor rod with grout stop plug and suitable for soft rock stratum |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110571346.7A CN113107561B (en) | 2021-05-25 | 2021-05-25 | Self-drilling type combined grouting anchor rod with grout stop plug and suitable for soft rock stratum |
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| Publication Number | Publication Date |
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| CN113107561A CN113107561A (en) | 2021-07-13 |
| CN113107561B true CN113107561B (en) | 2022-02-08 |
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| CN114320413A (en) * | 2021-11-26 | 2022-04-12 | 淮北矿业股份有限公司 | A high pressure resistant accurate location hole sealing device for slip casting stock |
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| CN212898560U (en) * | 2020-08-28 | 2021-04-06 | 浙江钱塘江水利建筑工程有限公司 | A slip casting stock for unfavorable geology tunnel construction |
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| CN202544883U (en) * | 2012-04-12 | 2012-11-21 | 刘文江 | Self-boring full thread hollow grouting anchor rod |
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