CN219910705U - Disposable grout stop plug for tunnel advanced support grouting construction - Google Patents
Disposable grout stop plug for tunnel advanced support grouting construction Download PDFInfo
- Publication number
- CN219910705U CN219910705U CN202321630514.6U CN202321630514U CN219910705U CN 219910705 U CN219910705 U CN 219910705U CN 202321630514 U CN202321630514 U CN 202321630514U CN 219910705 U CN219910705 U CN 219910705U
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- Prior art keywords
- grouting
- pipe
- spindle
- threaded
- cavity
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- 238000010276 construction Methods 0.000 title claims abstract description 27
- 239000011440 grout Substances 0.000 title claims description 30
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 26
- 239000010959 steel Substances 0.000 claims abstract description 26
- 238000000034 method Methods 0.000 claims abstract description 7
- 239000002002 slurry Substances 0.000 claims description 24
- 238000007789 sealing Methods 0.000 claims description 4
- 241001247986 Calotropis procera Species 0.000 claims description 3
- 238000007569 slipcasting Methods 0.000 claims 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 239000011435 rock Substances 0.000 description 5
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000002689 soil Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 241000405070 Percophidae Species 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Landscapes
- Lining And Supports For Tunnels (AREA)
Abstract
The utility model relates to a disposable grouting plug for tunnel advance support grouting construction, which comprises a spindle grouting pipe, a threaded pipe, a steel ball and a supporting spring, wherein a grouting cavity is formed in the threaded pipe, a grouting cavity is formed in the spindle grouting pipe, the front end of the supporting spring is supported on the inner wall of the spindle grouting pipe, and the rear end of the supporting spring is supported on the steel ball; is characterized in that: the periphery of the threaded pipe is provided with a rubber sleeve and a threaded sleeve, the inner wall of the threaded sleeve is provided with an internal thread matched with an external thread on the threaded pipe, the rear end of the rubber sleeve is fixedly connected with the front end of the threaded sleeve, and the rubber sleeve is plugged into a gap between the front end of the spindle grouting pipe and the inner wall of the advance conduit. The disposable grouting stop plug is relatively simple in structure and low in manufacturing cost, simplifies construction of grouting of the tunnel advance support, is simple to operate, and is disposable, so that grouting residues do not need to be detached and cleaned, grouting construction efficiency of the tunnel advance support is improved, and grouting process meets requirements.
Description
Technical Field
The utility model relates to a grouting stop, in particular to a disposable grouting stop for advanced support grouting construction of a tunnel.
Background
In the construction of a rock stratum with poor surrounding rock grade of a shallow tunnel, a small advanced guide pipe is generally adopted to carry out advanced support on loose surrounding rock in front of the tunnel face, after grouting, a period of time is passed for coagulation, original loose soil particles or cracks are glued into a whole, the broken state of the weak loose surrounding rock is changed, the stability of the surrounding rock is improved, and the injection condition of grout is the key of the advanced guide pipe to play a role. In grouting construction, a common grouting plug is generally adopted to connect the advanced guide pipe and the grouting guide pipe, but due to the limitation of technical conditions, the phenomenon of leakage, even the collapse of the grouting plug and the grouting guide pipe, often occurs under larger grouting pressure, in addition, the number of the advanced guide pipes is large, and the circulating convenience and practicability of grouting operation are also a key technology.
Through investigation literature, the patent number is CN109457999A, a grouting plug is invented, the problems of nonuniform pressure and disassembly after grouting is completed in the grouting process are solved, but residual slurry in the grouting pipe cannot be thoroughly cleaned after grouting operation is completed, the grouting pipe is blocked due to gradual accumulation, recycling cannot be achieved, the grouting plug can be unloaded after grouting is completed, slurry leakage can be caused, and meanwhile, the anchoring effect of an advanced guide pipe can be reduced due to operation vibration.
At present, no convenient and practical grouting plug can simultaneously meet the requirements of being convenient for circulating grouting operation and leakage protection after grouting is finished, so that a novel grouting plug for advanced support grouting construction of a tunnel needs to be invented.
Disclosure of Invention
The utility model provides a disposable grouting stop for advanced support grouting construction of a tunnel in order to overcome the defects of the technical problems.
The utility model discloses a disposable grouting plug for tunnel advance support grouting construction, which comprises a spindle grouting pipe, a threaded pipe, a steel ball and a support spring, wherein the front end of the threaded pipe is fixedly connected with the rear end of the spindle grouting pipe; the steel ball is positioned at the rear end of the slurry outlet cavity, the supporting spring is positioned in the slurry outlet cavity, the front end of the supporting spring is supported on the inner wall of the spindle grouting pipe, and the rear end of the supporting spring is supported on the steel ball; under the condition that the steel ball is not stressed by external force, the supporting spring always has the trend of propping the steel ball against the rear end of the pulp outlet cavity and sealing the steel ball; the method is characterized in that: the periphery of the threaded pipe is sequentially provided with a rubber sleeve and a threaded sleeve from front to back, the inner wall of the threaded sleeve is provided with an internal thread matched with an external thread on the threaded pipe, the rear end of the rubber sleeve is fixedly connected with the front end of the threaded sleeve, the inner diameter of the rubber sleeve is larger than the outer diameter of the threaded pipe, the spindle grouting pipe is used for being plugged into an advance guide pipe (13), and the rubber sleeve is used for being plugged into a gap between the front end of the spindle grouting pipe and the inner wall of the advance guide pipe.
The disposable grouting plug for the tunnel advance support grouting construction is characterized in that a plurality of auxiliary grouting holes are uniformly formed in the position, close to the front end, of the spindle grouting pipe, and the auxiliary grouting holes are communicated with a grouting cavity.
The disposable grout stop plug for the tunnel advance support grouting construction is characterized in that the threaded sleeve is connected with the rubber sleeve through the backing plate, a through hole for a threaded pipe to pass through is formed in the center of the backing plate, and the diameter of the through hole in the center of the backing plate is larger than the outer diameter of the threaded pipe; the front end of the thread bush is fixed on the rear surface of the backing plate, and the rear end of the rubber bush is fixed on the front surface of the backing plate.
The utility model discloses a disposable grouting stop for tunnel advance support grouting construction, wherein the rear end of a threaded pipe is connected with the grouting pipe, and the grouting pipe is connected with the threaded pipe in a threaded connection mode; the inner diameter of the rubber sleeve is not smaller than the inner diameter of the advance guide pipe.
The beneficial effects of the utility model are as follows: the utility model discloses a disposable grouting plug for tunnel advance support grouting construction, which is provided with a spindle grouting pipe, a threaded pipe, a rubber sleeve, a threaded sleeve, a steel ball and a supporting spring, wherein the threaded sleeve is fixed on the periphery of the threaded pipe in a threaded connection mode; when the grouting device is used, the spindle grouting pipe is plugged into the inner cavity at the end part of the advance conduit, the threaded sleeve is continuously rotated forwards, the rubber sleeve is plugged into a gap between the front end of the spindle grouting pipe and the inner wall of the advance conduit in an interference fit mode, so that firm connection is realized by the interference fit of the rubber sleeve and the gap between the advance conduit and the spindle grouting pipe, the threaded pipe is connected with the grouting pipe in a threaded connection mode, grout is injected into the grouting pipe, grout is driven to compress the supporting spring under the action of pressure, the sealing position of the steel ball is opened, at the moment, the pressure grout sequentially flows into the advance conduit through the grout inlet, the grouting cavity, the grout outlet and the auxiliary grout outlet, after grouting is finished, the steel ball returns under the action of the supporting spring, the grout outlet cavity is closed, the grouting pressure in the advance conduit is maintained unchanged, and loose soil particles or cracks around the front end of the advance conduit are integrated with the solidification of the grout; therefore, the disposable grouting plug for the tunnel advance support grouting construction is relatively simple in structure and low in manufacturing cost, simplifies the tunnel advance support grouting construction, is simple to operate, does not need to be detached and cleaned for grouting residues because the grouting plug is disposable, improves the tunnel advance support grouting construction efficiency, and ensures that the grouting process meets the requirements.
Drawings
FIG. 1 is a front view of a disposable grout stop plug for advanced support grouting construction of a tunnel of the present utility model;
FIG. 2 is a cross-sectional view of a disposable grout stop plug for advanced support grouting construction of a tunnel of the present utility model;
FIG. 3 is a perspective view of a disposable grout stop plug for advanced support grouting construction of a tunnel of the present utility model;
FIG. 4 is a perspective view of the disposable stopper removal spindle grouting pipe of the present utility model;
fig. 5 is a view showing a state of use of the disposable stopper of the present utility model.
In the figure: the grouting device comprises a spindle grouting pipe 1, a threaded pipe 2, a rubber sleeve 3, a threaded sleeve 4, a backing plate 5, a steel ball 6, a supporting spring 7, a grouting cavity 8, a grouting cavity 9, a grouting cavity 10, a grouting inlet 11, an auxiliary grouting hole 12, a leading guide pipe 13, a grouting pipe 14 and grouting liquid 15.
Description of the embodiments
The utility model will be further described with reference to the drawings and examples.
As shown in fig. 1, 2 and 3, a front view, a cross-sectional view and a perspective view of the disposable grout stop plug for advanced support grouting construction of a tunnel of the present utility model are respectively provided, fig. 4 shows a perspective view of the disposable grout stop plug of the present utility model with a spindle grouting pipe removed, and the disposable grout stop plug is composed of a spindle grouting pipe 1, a threaded pipe 2, a rubber sleeve 3, a threaded sleeve 4, a backing plate 5, a steel ball 6 and a supporting spring 7, wherein the rear end of the spindle grouting pipe 1 is fixedly connected with the threaded pipe 2, and can adopt a welded integrated structure. The spindle grouting pipe 1 is in a shape with thin two ends and thick middle, so that a grouting cavity 9 in the spindle grouting pipe 1 is in a shape with thin two ends and thick middle; the inside of the threaded pipe 2 is a grouting cavity 8, and the front end of the grouting cavity 8 is communicated with the rear end of a grouting cavity 9 under the condition that the steel ball 6 is not blocked. The rear end of the grouting cavity 8 is provided with a grouting inlet 10, the front end of the grouting cavity 9 is provided with a grouting outlet 11, and when the grouting pipe is used, the spindle grouting pipe 1 is used for being plugged into the inner cavity of the advance conduit 13, and the rear end of the threaded pipe 2 is used for being in threaded connection with the grouting pipe 14.
The steel ball 6 and the supporting spring 7 are both positioned in the slurry outlet cavity 9 of the spindle grouting pipe 1, the front end of the supporting spring 7 is propped against the inner wall of the front end of the slurry outlet cavity 9, the rear end of the supporting spring 7 is propped against the steel ball 6, and under the action of no external force, the steel ball 6 is propped against the rear end of the slurry outlet cavity 9 by the supporting spring 7, so that the rear end of the slurry outlet cavity 9 is not communicated with the slurry injection cavity 8.
The rubber sleeve 3, the backing plate 5 and the thread sleeve 4 are all arranged on the periphery of the thread tube 2, the periphery of the thread tube 2 is sequentially provided with external threads from front to back, the outer surface of the thread tube 2 is provided with internal threads matched with the external threads on the thread tube 2, and thus, the thread connection of the thread tube 2 and the thread sleeve 4 is realized, and the thread sleeve 4 can be moved along the length direction of the thread tube 2 by rotating. The center of the backing plate 5 is provided with a through hole through which the threaded pipe 2 passes, and the diameter of the through hole in the center of the backing plate 5 and the inner diameter of the rubber sleeve 3 are both larger than the outer diameter of the threaded pipe 2; the front end of the thread bush 4 is fixedly connected with the backing plate 5, and the rear end of the rubber bush 3 is fixedly connected with the backing plate 5, so that the thread bush 3 and the backing plate 5 can move along with the movement of the thread bush 4.
A plurality of auxiliary grout outlets 12 are uniformly formed in the spindle grouting pipe 1 near the front grout outlet 11, and in the grout injection process, if the grout outlet 11 is not used for discharging grout, the grout can flow into the advance guide pipe 13 through the auxiliary grout outlets 12. When the device is used, the spindle grouting pipe 1 is used for being plugged into the inner cavity of the advance conduit 13, the rear end of the threaded pipe 2 is connected with the grouting pipe 14 in a threaded connection mode, the rubber sleeve 3 is used for being plugged into a gap formed between the inner wall of the advance conduit 13 and the front end of the spindle grouting pipe 1, interference fit between the rubber sleeve 3 and the inner wall of the advance conduit 13 and between the rubber sleeve 3 and the outer wall of the spindle grouting pipe 1 is guaranteed, and therefore the requirement is that the outer diameter of the rubber sleeve 3 is preferably not smaller than the inner diameter of the advance conduit 13.
As shown in fig. 5, a usage state diagram of the disposable grout stop plug of the present utility model is provided, and the usage process of the disposable grout stop plug for tunnel advance support grouting construction of the present utility model is as follows:
firstly, screwing a thread sleeve 4 to the rear end of a thread pipe 2, and then plugging a spindle grouting pipe 1 into an inner cavity of a leading guide pipe 13 to be grouted; then, the screw sleeve 4 is rotated by the duckbill pliers, so that the screw sleeve 4 moves towards one side where the leading conduit 13 is located, the rubber sleeve 3 is ensured to be plugged into a gap between the leading conduit 13 and the spindle grouting pipe 1, after the screw sleeve 4 rotates forwards in place, the rubber sleeve 3 is tightly embedded into the spindle grouting pipe 1 and the leading conduit 13 in an interference fit mode, and the rubber sleeve 3 and the leading conduit 13 are tightly connected.
Then, the front end of the grouting pipe 14 is connected with the rear end of the threaded pipe 2 in a threaded fit mode, after the connection is firm, pressure slurry 15 is injected through the grouting pipe 14, the pressure slurry 15 firstly enters the grouting cavity 8 through the slurry inlet 10, then the pressure slurry 15 compresses the supporting spring 7 through the jacking steel ball 6, the sealing position of the steel ball 6 is opened, the slurry 15 enters the slurry outlet cavity 9, and enters the inner cavity of the advance conduit 13 through the slurry outlet 11 and/or the auxiliary slurry outlet 12, and due to the plugging effect of the rubber sleeve 3 on the outer end of the advance conduit 13, the slurry 15 only enters the advance conduit 13 and flows into the front end of the advance conduit 13.
After grouting is finished, the grouting pipe 14 is disconnected from the threaded pipe 2, the steel ball 6 returns under the action of the elasticity of the supporting spring 7, so that the rear end of the grouting cavity 9 is plugged, the pressure of the slurry 15 in the spindle grouting pipe 1 is maintained within a certain range, and loose soil particles or cracks around the front end of the advance guide pipe are glued into a whole.
Claims (4)
1. A disposable grouting plug for tunnel advance support grouting construction comprises a spindle grouting pipe (1), a threaded pipe (2), a steel ball (6) and a supporting spring (7), wherein the front end of the threaded pipe is fixedly connected with the rear end of the spindle grouting pipe, external threads are arranged on the outer surface of the threaded pipe, a grouting cavity (8) is arranged in the threaded pipe, a grouting cavity (9) with two thin ends and thick middle is arranged in the spindle grouting pipe, the grouting cavity is communicated with the grouting cavity, a grouting inlet (10) is formed at the rear end of the grouting cavity, and a grouting outlet (11) is formed at the front end of the grouting cavity; the steel ball is positioned at the rear end of the slurry outlet cavity (9), the supporting spring is positioned in the slurry outlet cavity, the front end of the supporting spring is supported on the inner wall of the spindle grouting pipe, and the rear end of the supporting spring is supported on the steel ball; under the condition that the steel ball is not stressed by external force, the supporting spring always has the trend of propping the steel ball against the rear end of the pulp outlet cavity and sealing the steel ball; the method is characterized in that: the periphery of screwed pipe (2) has set gradually rubber sleeve (3) and thread bush (4) from front to back, is provided with on the inner wall of thread bush with the external screw thread matched with on the screwed pipe internal thread, the rear end of rubber sleeve and the front end fixed connection of thread bush, the internal diameter of rubber sleeve (3) is greater than the external diameter of screwed pipe (2), spindle slip casting pipe is arranged in to pack into advance pipe (13), the rubber sleeve is arranged in to pack into in the gap between spindle slip casting pipe (1) front end and the advance pipe (13) inner wall.
2. The disposable grout stop for advanced support grouting construction of a tunnel of claim 1, wherein: a plurality of auxiliary slurry outlet holes (12) are uniformly formed in the position, close to the front end, of the spindle grouting pipe (1), and the auxiliary slurry outlet holes are communicated with the slurry outlet cavity (9).
3. The disposable grout stop for advanced support grouting construction of tunnel according to claim 1 or 2, wherein: the threaded sleeve (4) is connected with the rubber sleeve (3) through the backing plate (5), a through hole for the threaded pipe (2) to pass through is formed in the center of the backing plate, and the diameter of the through hole in the center of the backing plate is larger than the outer diameter of the threaded pipe; the front end of the thread bush is fixed on the rear surface of the backing plate, and the rear end of the rubber bush is fixed on the front surface of the backing plate.
4. The disposable grout stop for advanced support grouting construction of tunnel according to claim 1 or 2, wherein: the rear end of the threaded pipe (2) is connected with a grouting pipe (14), and the grouting pipe is connected with the threaded pipe in a threaded connection mode; the inner diameter of the rubber sleeve (3) is not smaller than the inner diameter of the advance conduit (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321630514.6U CN219910705U (en) | 2023-06-26 | 2023-06-26 | Disposable grout stop plug for tunnel advanced support grouting construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321630514.6U CN219910705U (en) | 2023-06-26 | 2023-06-26 | Disposable grout stop plug for tunnel advanced support grouting construction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219910705U true CN219910705U (en) | 2023-10-27 |
Family
ID=88468377
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321630514.6U Active CN219910705U (en) | 2023-06-26 | 2023-06-26 | Disposable grout stop plug for tunnel advanced support grouting construction |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219910705U (en) |
-
2023
- 2023-06-26 CN CN202321630514.6U patent/CN219910705U/en active Active
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant |