CN213684176U - Tunnel arch portion anchor rod hole slip casting exhaust and pressure stabilizing device - Google Patents
Tunnel arch portion anchor rod hole slip casting exhaust and pressure stabilizing device Download PDFInfo
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- CN213684176U CN213684176U CN202022105584.2U CN202022105584U CN213684176U CN 213684176 U CN213684176 U CN 213684176U CN 202022105584 U CN202022105584 U CN 202022105584U CN 213684176 U CN213684176 U CN 213684176U
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Abstract
The utility model belongs to the technical field of tunnel engineering, in particular to a grouting exhaust and pressure stabilizing device for a tunnel arch part anchor rod hole, which comprises a pressure stabilizing device and a grouting pipe with a backflow check function, wherein the pressure stabilizing device is arranged at the end part of the air outlet end of a hollow anchor rod body, the grouting pipe with the backflow check function is arranged at one side of the hollow anchor rod body, and the grout outlet end of the grouting pipe with the backflow check function sequentially passes through a backing plate and a grout stop plug which are arranged on the hollow anchor rod body; the grouting pipe with the backflow check function comprises a grouting pipe body, and a first end part cut-off cone section is arranged at the grout outlet end of the grouting pipe body; the first end cut-open cone section is composed of a plurality of first cone sheets which can be closed to form a cone structure and opened to form a hollow structure; the surface that first end cut the cone section is equipped with first elasticity rubber circle. The utility model discloses can guarantee slip casting in-process steady voltage and prevent that the thick liquid from the slip casting pipe backward flow, improve the anchor quality.
Description
Technical Field
The utility model belongs to the technical field of tunnel engineering, concretely relates to tunnel hunch portion stock hole slip casting exhaust and pressure stabilizer, by its tunnel engineering who is applicable to the mine method construction and adopts anchor bolt support.
Background
The anchor bolt support is widely applied to underground caverns such as traffic tunnels, hydraulic caverns and the like, and is one of main support measures of tunnels designed according to the 'new Austrian' principle. A commonly used grouting anchor in China generally comprises an anchoring head 100 (anchored by using an expanding shell type metal anchor or resin), a hollow rod body 200, a grout stop plug 300, a backing plate 400, a nut 500 and an exhaust (grouting) pipe 600, as shown in fig. 1. When the anchor rod is used for supporting the arch part of the tunnel, the anchor rod is inclined upwards, so that the grouting of the anchor rod hole is carried out by adopting a mode of feeding the grouting through the exhaust (grouting) pipe and exhausting the grouting through the hollow rod body; when the stock is used for tunnel side wall to strut, the stock down slope this moment, consequently adopt the cavity body of rod to advance thick liquid, exhaust (slip casting) pipe exhaust (thick liquid) mode carries out the anchor rod hole slip casting.
When the anchor rod is used for supporting the arch part of the tunnel, the following problems exist: 1) because the grouting pipe and the hollow rod body are not provided with the grout stopping plugs, the pressure cannot be stabilized in the grouting process, the grout cannot permeate into the surrounding rock, and the anchoring effect is reduced; 2) after grouting is finished and the grouting connecting pipe is pulled out, as the grout is still in a flowing state, part of the grout can flow back from the grouting pipe, so that a local cavity is formed at the periphery of the anchor rod, and insufficient grouting is caused. Therefore, there is a need for a grouting venting and pressure stabilizing device for anchor rod holes of tunnel arch to solve the above problems.
Disclosure of Invention
In order to overcome the not enough of above-mentioned prior art existence, the utility model aims at providing a tunnel hunch portion anchor rod hole slip casting is carminative and pressure stabilizer can guarantee slip casting in-process steady voltage and prevent that the thick liquid from the slip casting pipe backward flow, improves stock anchor quality.
In order to achieve the purpose, the technical scheme of the utility model is that the grouting exhaust and pressure stabilizing device for the anchor rod hole of the arch part of the tunnel comprises a pressure stabilizing device and a grouting pipe with a backflow check function, wherein the pressure stabilizing device is arranged at the end part of the air outlet end of the hollow anchor rod body, the grouting pipe with the backflow check function is arranged at one side of the hollow anchor rod body, and the grout outlet end of the grouting pipe with the backflow check function sequentially passes through a backing plate and a grout stop plug which are arranged on the hollow anchor rod body; the grouting pipe with the backflow check function comprises a grouting pipe body, and a first end part cut-off cone section is arranged at the grout outlet end of the grouting pipe body; the first end cut-open cone section is composed of a plurality of first cone sheets which can be closed to form a cone structure and opened to form a hollow structure; the surface that first end cut the cone section is equipped with first elasticity rubber circle.
Further, the first end-cut-cone segment has a connecting end and a tip end, the first vertebral segment decreasing in size from the connecting end to the tip end; the first elastic rubber ring is sleeved on the connecting end of the first end cutting cone section.
Further, the plurality of first vertebral pieces are the same size.
Further, the cone structure is a cone structure.
Further, the pressure stabilizing device comprises a hollow plastic pipe, a sand bag and a second elastic rubber ring, the air inlet end of the hollow plastic pipe is connected with the hollow anchor rod body, and the surface of the air outlet end of the hollow plastic pipe is sleeved with the second elastic rubber ring; a sand bag is arranged in the hollow plastic pipe.
Further, the hollow plastic tube comprises a nut section, a non-threaded rod section and a second end-cut cone section connected in sequence; the nut section is in threaded connection with the hollow anchor rod body, the sand bag is arranged in the non-threaded rod body section, and the second elastic rubber ring is sleeved on the surface of the second end section cut cone section; the second end-cut cone segment is comprised of a plurality of second cone pieces that can be expanded to form a hollow structure.
Furthermore, the sand bag is made of geotextile wrapped coarse sand.
Compared with the prior art, the utility model discloses following beneficial effect has:
(1) the utility model discloses a grouting pipe with backflow check function, wherein a first end section formed by a first cone sheet is arranged at the end part of the grouting pipe body extending into the anchor rod hole, and the grouting pipe is compressed by a first elastic rubber ring; during grouting, under the action of grouting pressure, a plurality of first cone sheets with the first end parts cutting the cone sections are opened to form a hollow structure, and grout enters the anchor rod hole through the hollow structure; after grouting is stopped, the first cone pieces with the cone sections cut at the first end parts are closed under the pressure action of the first elastic rubber ring wrapped outside the first cone pieces to form a closed cone structure, so that slurry can be effectively prevented from flowing back;
(2) the utility model discloses a slip casting pipe slip casting, through the pressure stabilizer of cavity stock body backward flow until the tip after the stock hole is filled with the thick liquid, the sand package in the pressure stabilizer is ventilative but not leak thick liquid, moves to the end of giving vent to anger under the slip casting pressure effect, receives the restriction of outsourcing second elastic rubber circle contractive force, forms the steady voltage, guarantees steady voltage in the slip casting process, improves the slip casting compactness of stock hole effectively, improves stock anchor quality;
(3) the utility model discloses replace original slip casting pipe for on the basis of existing stock assembly the utility model provides a slip casting pipe with backward flow contrary function to the tip installation of the end of giving vent to anger at the cavity stock body the utility model provides a voltage stabilizer, not only to the transformation of existing stock assembly few, the transformation expense is low, and does not change the original construction process of stock after the transformation, can also guarantee slip casting in-process steady voltage and prevent that the thick liquid from the slip casting pipe backward flow.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is an overall view of a prior art grouting bolt provided in the background art;
fig. 2 is a schematic view of a grouting pipe with a backflow check function according to an embodiment of the present invention when no grouting is performed;
fig. 3 is a schematic view of a grouting pipe with a backflow check function according to an embodiment of the present invention during grouting;
fig. 4 is a schematic structural diagram of a grouting anchor rod according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a voltage stabilizer provided in an embodiment of the present invention;
in the figure: 1. the grouting pipe with the backflow check function comprises a grouting pipe body 11, a grouting pipe body 12, a first end part cut-off cone section 13, a first elastic rubber ring 14, a grouting hole 2, a hollow anchor rod body 3, a grout stop plug 4, a backing plate 5, a nut 6, an expansion shell type anchor member 7, a pressure stabilizing device 71, a hollow plastic pipe 711, a nut section 712, a non-threaded rod section 713, a second end part cut-off cone section 72, a sand bag 73 and a second elastic rubber ring.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, are not to be construed as limiting the present invention.
The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature; in the description of the present invention, "a plurality" means two or more unless otherwise specified.
As shown in fig. 2-3, the embodiment provides a grouting air exhausting and pressure stabilizing device for a tunnel arch bolt hole, which includes a pressure stabilizing device 7 and a grouting pipe 1 with backflow check function, wherein the pressure stabilizing device 7 is installed at the end of the air outlet end of a hollow bolt body 2, the grouting pipe 1 with backflow check function is installed at one side of the hollow bolt body 2, and the grout outlet end of the grouting pipe 1 with backflow check function sequentially passes through a backing plate 4 and a grout stop plug 3 installed on the hollow bolt body 2; the grouting pipe 1 with the backflow check function comprises a grouting pipe body 11, the grouting pipe body 11 is provided with a grouting inlet end and a grouting outlet end, and the grouting outlet end of the grouting pipe body 11 is provided with a first end part cut-off cone section 12; the first end-cut cone segment 12 is comprised of a plurality of first cone pieces that can be closed to form a cone structure and opened to form a hollow structure; the surface of the first end cut-out cone section 12 is sleeved with a first elastic rubber ring 13. The grouting pipe 1 with backflow check function of the embodiment is provided with a first end cut cone section 12 formed by a first cone sheet at the end part of the grouting pipe body 11 extending into the anchor rod hole, and is compressed by a first elastic rubber ring 13; during grouting, under the action of grouting pressure, a plurality of first cone sheets of the cone section 12 cut at the first end part are opened to form a hollow structure, and grout enters an anchor rod hole through the hollow structure; after grouting is stopped, a plurality of first cone pieces of the cone section 12 cut at the first end part are closed under the pressure action of the first elastic rubber ring 13 wrapped outside the cone section to form a closed cone structure, so that slurry can be effectively prevented from flowing back; meanwhile, a pressure stabilizing device 7 is installed at the end part of the air outlet end of the hollow anchor rod body 2, pressure stabilization in the grouting process is guaranteed, and the grouting compactness of the anchor rod hole and the anchor rod anchoring quality are improved.
Further, the first end-cut-cone segment 12 has a connecting end and a tip end, the size of the first vertebral segment decreasing from the connecting end to the tip end; the first elastic rubber ring 13 is sleeved on the connecting end of the first end cutting cone section 12. In the embodiment, the elasticity of the first elastic rubber ring 13 should be calculated, determined and selected according to the grouting pressure, the elastic restoring force of the first end cut-off cone section 12 and other factors, so as to ensure that the plurality of first cone pieces of the first end cut-off cone section 12 can be opened under the designed grouting pressure and can be closed after the grouting is finished.
Further, the first vertebral segments may be the same size, different or not identical.
Preferably, the cone structure is a cone structure.
Further, the pressure stabilizer 7 comprises a hollow plastic pipe 71, a sand bag 72 and a second elastic rubber ring 73, the air inlet end of the hollow plastic pipe 71 is connected with the hollow anchor rod body 2, and the surface of the air outlet end of the hollow plastic pipe 71 is sleeved with the second elastic rubber ring 73; a sand bag 72 is arranged in the hollow plastic pipe 71. As shown in fig. 5, in the present embodiment, the sand pack 72 is located between the hollow anchor rod body 2 and the second elastic rubber ring 73 in the hollow plastic pipe 71, when the grout flows back to the pressure stabilizer 7, the sand pack moves to the air outlet end under the action of the grouting pressure, and when the sand pack moves to the position corresponding to the second elastic rubber ring 73, the sand pack 72 stops moving under the restriction of the contraction force of the outer elastic rubber ring, so as to achieve the air exhausting function and the pressure stabilizing function.
Further, the hollow plastic tube 71 comprises a nut section 711, a non-threaded rod section 712 and a second end-cut cone section 713, which are connected in sequence; the nut section 711 is connected to the hollow anchor rod body 2 by a screw thread, the sand pack 72 is disposed in the non-threaded rod section 712, and the second elastic rubber ring 73 is sleeved on the surface of the second end cut-off cone section 713; the second end-cutting cone segment 713 is comprised of a plurality of second cone segments that can be expanded to form a hollow structure. When the air in the anchor hole enters the hollow plastic tube 71, the second plurality of cone segments of the second end-cut cone section 713 are expanded to form a hollow structure by the air pressure, and the air is discharged through the hollow structure. In this embodiment, the elasticity of the second elastic rubber ring 73 sleeved on the second end cut-off cone section 713 should be calculated and determined and the material should be selected according to the grouting pressure, the elastic restoring force of the plastic pipe second end cut-off cone section 713, and other factors, so as to ensure that the pressing force of the second elastic rubber ring 73 can meet the requirement of the grouting pressure.
Further, the sand pack 72 is made of geotextile wrapped coarse sand. The sand pack 72 of this embodiment is made by wrapping a certain amount of coarse sand with geotextile, and is air permeable but not slurry-leaking, wherein the length of the sand pack 72, permeability coefficient of geotextile, particle size of coarse sand, etc. should be determined according to air permeability and permeability of grouting slurry.
As shown in fig. 2-5, the present embodiment further provides a construction method using the grouting air exhausting and pressure stabilizing device for the anchor rod hole of the arch part of the tunnel, which includes the following steps:
s1, replacing the conventional grouting pipe with the backflow check function with the grouting pipe 1, and installing the grouting pipe on a grouting anchor rod according to normal construction requirements; as shown in fig. 4, a slurry outlet end of a hollow anchor rod body 2 is provided with a shell expansion type anchoring part 6, a slurry inlet end of the hollow anchor rod body 2 is sequentially provided with a nut 5, a backing plate 4 and a slurry stop plug 3, a slurry outlet end of a grouting pipe body 11 sequentially penetrates through the backing plate 4 and the slurry stop plug 3, and a slurry inlet end of the grouting pipe body 11 is positioned on one side of the backing plate 4 departing from the slurry stop plug 3;
s2, constructing anchor rod drilling holes, then inserting grouting anchor rods, and realizing end head anchoring;
s3, installing the pressure stabilizing device 7 at the end part of the air outlet end of the hollow anchor rod body 2 to ensure pressure stabilization in the grouting process;
s4, grouting from the grouting pipe body 11, with the rising of pressure, cutting a plurality of first cone sheets of the cone section 12 at the first end part of the grout outlet end of the grouting pipe body 11 and opening to form a hollow structure, and enabling grout to flow out of the hollow structure and enter the anchor rod hole;
s5, along with the increase of the grouting amount, the grout flows from the bottom to the top along the anchor rod hole, and the air in the anchor rod hole enters the hollow anchor rod body 2 and is discharged from the pressure stabilizing device 7 at the air outlet end of the hollow anchor rod body 2;
s6, with the further increase of the grouting amount, the grout fills the whole anchor rod hole and flows back from the hollow anchor rod body 2 to the pressure stabilizer 7;
s7, the sand pack 72 in the hollow plastic pipe 71 of the pressure stabilizer 7 moves to the air outlet end under the action of grouting pressure, and when the sand pack moves to the position of the second elastic rubber ring 73, the sand pack 72 stops moving under the restriction of the contraction force of the second elastic rubber ring 73 coated outside, so that pressure stabilization is formed;
and S8, stopping grouting after the grouting pressure stabilization reaches the design specified time, closing the first cone pieces with the first end parts cut open the cone section 12 under the action of the contraction force of the first elastic rubber ring 13 wrapped outside the first cone pieces to form a closed cone structure, preventing the backflow of the grout, and removing a grouting pipe.
The embodiment replaces original slip casting pipe for slip casting pipe 1 that has the contrary function of backward flow that this embodiment provided on the basis of existing stock assembly to pressure stabilizer 7 that this embodiment provided is installed to the tip at the end of giving vent to anger of cavity stock body 2, and not only to the transformation of existing stock assembly few, the transformation expense is low, and does not change the original construction technology of stock after the transformation, can also guarantee slip casting in-process steady voltage and prevent that the thick liquid from the slip casting pipe backward flow.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The utility model provides a tunnel hunch portion anchor rod hole slip casting exhaust and pressure stabilizer which characterized in that: the grouting device is arranged at the end part of the air outlet end of the hollow anchor rod body, the grouting pipe with the backflow check function is arranged on one side of the hollow anchor rod body, and the grout outlet end of the grouting pipe with the backflow check function sequentially penetrates through a cushion plate and a grout stop plug which are arranged on the hollow anchor rod body; the grouting pipe with the backflow check function comprises a grouting pipe body, and a first end part cut-off cone section is arranged at the grout outlet end of the grouting pipe body; the first end cut-open cone section is composed of a plurality of first cone sheets which can be closed to form a cone structure and opened to form a hollow structure; the surface that first end cut the cone section is equipped with first elasticity rubber circle.
2. The apparatus for grouting, exhausting and stabilizing pressure of an anchor rod hole of a tunnel arch part according to claim 1, wherein: the first end-cut cone segment having a connecting end and a tip end, the first cone segment decreasing in size from the connecting end to the tip end; the first elastic rubber ring is sleeved on the connecting end of the first end cutting cone section.
3. The apparatus for grouting, exhausting and stabilizing pressure of an anchor rod hole of a tunnel arch part according to claim 1, wherein: the first vertebral pieces are the same size.
4. The apparatus for grouting, exhausting and stabilizing pressure of an anchor rod hole of a tunnel arch part according to claim 1, wherein: the cone structure is a cone structure.
5. The apparatus for grouting, exhausting and stabilizing pressure of anchor rod holes of tunnel arch according to any one of claims 1 to 4, wherein: the pressure stabilizing device comprises a hollow plastic pipe, a sand bag and a second elastic rubber ring, the air inlet end of the hollow plastic pipe is connected with the hollow anchor rod body, and the surface of the air outlet end of the hollow plastic pipe is sleeved with the second elastic rubber ring; a sand bag is arranged in the hollow plastic pipe.
6. The apparatus for grouting, exhausting and stabilizing pressure of an anchor rod hole of a tunnel arch part according to claim 5, wherein: the hollow plastic pipe comprises a nut section, a non-threaded rod section and a second end cut-off cone section which are sequentially connected; the nut section is in threaded connection with the hollow anchor rod body, the sand bag is arranged in the non-threaded rod body section, and the second elastic rubber ring is sleeved on the surface of the second end section cut cone section; the second end-cut cone segment is comprised of a plurality of second cone pieces that can be expanded to form a hollow structure.
7. The apparatus for grouting, exhausting and stabilizing pressure of an anchor rod hole of a tunnel arch part according to claim 5, wherein: the sand bag is made by wrapping coarse sand with geotextile.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022105584.2U CN213684176U (en) | 2020-09-23 | 2020-09-23 | Tunnel arch portion anchor rod hole slip casting exhaust and pressure stabilizing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022105584.2U CN213684176U (en) | 2020-09-23 | 2020-09-23 | Tunnel arch portion anchor rod hole slip casting exhaust and pressure stabilizing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213684176U true CN213684176U (en) | 2021-07-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022105584.2U Active CN213684176U (en) | 2020-09-23 | 2020-09-23 | Tunnel arch portion anchor rod hole slip casting exhaust and pressure stabilizing device |
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| Country | Link |
|---|---|
| CN (1) | CN213684176U (en) |
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2020
- 2020-09-23 CN CN202022105584.2U patent/CN213684176U/en active Active
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