CN215486042U - Large-diameter pipe-jacking grouting hole plugging device - Google Patents
Large-diameter pipe-jacking grouting hole plugging device Download PDFInfo
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- CN215486042U CN215486042U CN202120601863.XU CN202120601863U CN215486042U CN 215486042 U CN215486042 U CN 215486042U CN 202120601863 U CN202120601863 U CN 202120601863U CN 215486042 U CN215486042 U CN 215486042U
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- Prior art keywords
- grouting hole
- embedded part
- wall
- pipe
- valve
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 10
- 238000007789 sealing Methods 0.000 claims description 26
- 241000405070 Percophidae Species 0.000 claims description 15
- 238000007569 slipcasting Methods 0.000 claims description 7
- 239000003292 glue Substances 0.000 claims description 3
- 239000004033 plastic Substances 0.000 claims description 3
- 229920003023 plastic Polymers 0.000 claims description 3
- 230000008961 swelling Effects 0.000 claims description 3
- 239000004429 Calibre Substances 0.000 claims description 2
- 239000011248 coating agent Substances 0.000 claims 1
- 238000000576 coating method Methods 0.000 claims 1
- 239000002002 slurry Substances 0.000 abstract description 17
- 230000000694 effects Effects 0.000 abstract description 14
- 239000004568 cement Substances 0.000 abstract description 4
- 230000000903 blocking effect Effects 0.000 abstract description 2
- 239000011083 cement mortar Substances 0.000 description 14
- 238000000034 method Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000005489 elastic deformation Effects 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The utility model discloses a large-caliber pipe-jacking grouting hole plugging device which comprises a check valve, an embedded part, an extension pipe and a duckbill valve, wherein the check valve, the embedded part, the extension pipe and the duckbill valve are arranged in a grouting hole; the embedded part, the extension pipe and the duckbilled valve are sequentially connected, the embedded part connecting grouting hole is located in the hole opening of the inner wall of the pipeline, the duckbilled valve connecting grouting hole is located in the hole opening of the outer wall of the pipeline, and the check valve is arranged at the connecting position of the embedded part and the extension pipe and is in adjustable fit with the embedded part. The blocking device adopts a double-layer check structure, the duckbill valve on the outer layer bears main pressure, the pressure resistance of the duckbill valve is enhanced by the check valve, and the check valve is used as a second-layer check structure to enhance the check effect. And the embedded part has a plugging effect on the check valve and the inner wall of the grouting hole, so that the anti-drag slurry, the micro-expansion cement slurry or the underground water is prevented from flowing backwards along the grouting hole and flowing into the pipeline.
Description
Technical Field
The utility model belongs to the technical field of pipe jacking construction, and particularly relates to a large-caliber pipe jacking grouting hole plugging device.
Background
The pipe jacking technology is a trenchless construction technology for jacking a pipeline section by section underground. Firstly, a channel is opened underground by a pipe jacking machine, then the pipelines are jacked into the channel section by section, and finally every two adjacent pipelines are spliced to finish pipeline laying. Pipes having a diameter of 2000mm or more are generally classified as large-diameter pipes in which workers can walk upright for the convenience of the workers working inside the pipes.
Heavy-calibre pipeline is in the operation of push pipe, because pipeline outer wall and the friction of passageway inner wall and produce very big resistance, hinder the pipeline jacking in the passageway, consequently, need set up the injected hole at the pipe wall, make injected hole intercommunication pipeline's inner chamber and outside passageway, pour into drag reduction mud into through the injected hole to the gap between passageway and the pipeline outer wall in pipeline inside, make drag reduction mud form between pipeline outer wall and passageway inner wall and subtract the resistance layer, reduce the friction between pipeline outer wall and the passageway inner wall, reduce the resistance of jacking pipeline.
And after the pipe jacking operation is finished, injecting micro-expansion cement mortar into the gap between the outer wall of the pipeline and the inner wall of the through hole through the grouting hole again to replace the anti-drag slurry and avoid the collapse of the stratum structure around the pipeline.
Although the prior art adopts the check valve to block in the grouting hole, the pressure resistance of the check valve is insufficient, and the resistance-reducing mud or the micro-expansion cement mortar are easy to leak into the pipeline from the check valve under high pressure. In addition, when the micro-expansion cement mortar is used for replacing the anti-drag slurry, stronger pressure can be generated, and the leakage probability of the check valve is increased, so that the grouting hole plugging device suitable for large-diameter pipeline pipe jacking operation is urgently needed, the check effect is enhanced, and the anti-drag slurry, the micro-expansion cement mortar or underground water is prevented from being reversely poured back into the pipeline along the grouting hole.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a large-diameter pipe-jacking grouting hole plugging device which is used for plugging a grouting hole, enhancing the non-return effect and avoiding the problem of reverse flow of anti-drag slurry, micro-expansion cement slurry or underground water along the grouting hole.
The utility model is realized by the following technical scheme:
a large-diameter pipe-jacking grouting hole plugging device comprises a check valve, an embedded part, an extension pipe and a duckbill valve which are arranged in a grouting hole; the embedded part, the extension pipe and the duckbill valve are sequentially connected, the embedded part is connected with the grouting hole and is located in the hole opening of the inner wall of the pipeline, the duckbill valve is connected with the grouting hole and is located in the hole opening of the outer wall of the pipeline, and the check valve is arranged at the joint of the embedded part and the extension pipe and is in adjustable fit with the embedded part.
Through the scheme, the utility model at least obtains the following technical effects:
compare in the downthehole current scheme that only sets up check valve that slip casting, the plugging device of this scheme has increased the duckbilled valve and has used the extension pipe to communicate duckbilled valve and check valve as a whole, and the dual check valve structure through duckbilled valve and check valve combination strengthens the check effect. The embedded part is used as a basic frame for adjusting the check valve, plays a role in plugging a gap between the check valve and the inner wall of the grouting hole and enhances the sealing property. And the anti-drag slurry or micro-expansion cement mortar outside the pipeline is prevented from permeating into the pipeline along the gap between the check valve and the inner wall of the grouting hole.
Preferably, the outer wall of the embedded part is fixedly connected with the inner wall of the grouting hole, and the inner wall of the embedded part is provided with internal threads; and the outer wall of the check valve is provided with external threads and is matched with the internal threads on the inner wall of the embedded part.
Preferably, a sealing element is arranged at the joint of the embedded part and the extension pipe.
Preferably, the sealing element is an annular sealing ring made of a water-swelling water stop strip, or the sealing element is a structure formed by covering swelling rubber on the surface of an elastic sealing washer.
Preferably, the device also comprises a screw cap; and the outer wall of the spiral cover is provided with external threads, and the embedded part is detachably screwed into the orifice of the inner wall of the pipeline from the grouting hole.
Preferably, the duckbill valve is formed by sequentially connecting and integrating an interface, a valve body and a duckbill outlet; the interface is connected with the port flange of the extension pipe, the duckbill outlet is arranged in the grouting hole and is reserved with the grouting hole between the orifices on the outer wall of the pipeline with a redundant space.
Preferably, the joint of the interface and the port flange of the extension pipe is fixed by waterproof glue in an adhesion manner.
Preferably, the embedded part, the extension pipe, the check valve and the screw cap are all made of plastics.
Preferably, the duckbill valve is made of rubber.
The utility model has the beneficial effects that:
the blocking device adopts a double-layer check structure, the duckbill valve on the outer layer bears main pressure, the pressure resistance of the duckbill valve is enhanced by the check valve, and the check valve is used as a second-layer check structure to enhance the check effect. And the embedded part has a plugging effect on the check valve and the inner wall of the grouting hole, so that the anti-drag slurry, the micro-expansion cement slurry or the underground water is prevented from flowing backwards along the grouting hole and flowing into the pipeline.
Drawings
Fig. 1 is a schematic cross-sectional structure view of a large-caliber pipe-jacking grouting hole plugging device according to an embodiment of the present invention.
Fig. 2 is a schematic cross-sectional view of an embedded part according to an embodiment of the utility model.
Fig. 3 is a schematic cross-sectional view of a screw cap according to an embodiment of the present invention.
Fig. 4 is a schematic cross-sectional front view of a seal according to an embodiment of the present invention.
Fig. 5 is a schematic top view of a sealing member according to an embodiment of the present invention.
Figure 6 is a schematic top cross-sectional view of a duckbill valve in accordance with an embodiment of the present invention.
Figure 7 is a side cross-sectional view of a duckbill valve in accordance with an embodiment of the present invention.
Fig. 8 is a cross-sectional view of an extension pipe according to an embodiment of the present invention.
Legend:
1 grouting holes; 2, a check valve; 3, embedding parts; 4, extending a pipe; 5 a duckbill valve; 6, sealing element; 7, a screw cap; 8 channels; 9 a pipeline;
a 51 interface; 52 a valve body; 53 duckbill outlet.
Detailed Description
The utility model is further illustrated by the following figures and examples.
Example 1:
the embodiment provides a plugging device for a large-diameter jacking pipe grouting hole, which comprises a check valve 2, an embedded part 3, an extension pipe 4, a duckbill valve 5 and a screw cap 7. Built-in fitting 3, extension pipe 4 and duckbilled valve 5 connect gradually and install in slip casting hole 1, and built-in fitting 3 links up the drill way that slip casting hole 1 is located pipeline 9 inner wall, and duckbilled valve 5 links up the drill way that slip casting hole 1 is located pipeline 9 outer wall, constitutes the slip casting passageway of the inside and outside both sides of intercommunication pipeline 9. The check valve 2 is movably arranged in the embedded part 3, and the screw cover 7 is detachably buckled at the end part of the embedded part 3 on one side of the inner wall of the pipeline 9.
Since the grouting holes 1 are radially arranged along the pipeline 9, the embedment 3, the extension pipe 4 and the duckbill valve 5 are linearly arranged in the radial direction of the pipeline 9.
The embedded part 3 is of a sleeve structure with internal threads, the outer wall of the embedded part is fixedly connected with the inner wall of the grouting hole 1, the embedded part can be used as a spiral channel for adjusting the position of the check valve 2, and can also be used for plugging a gap between the check valve 2 and the inner wall of the grouting hole 1, so that the anti-drag slurry, micro-expansion cement slurry or underground water is prevented from flowing backwards into the pipeline 9 along the grouting hole 1.
The outer wall of the check valve 2 is provided with external threads, and the external threads are matched with the internal threads of the embedded part 3, so that the check valve 2 can be jacked or retracted in the embedded part 3 in a spiral manner, the position of the check valve 2 can be adjusted, and the effect of supporting and positioning can be provided for the check valve 2.
The joint of the embedded part 3 and the extension pipe 4 is provided with a sealing element 6, the sealing element 6 is an annular sealing ring made of a water-swelling water stop strip, and a structure that swelling rubber is coated on the surface of the elastic sealing ring can be replaced. Under the action of liquid pressure, the sealing element 6 is stressed along the radial direction of the pipeline 9 and generates elastic deformation, and the inner ring diameter of the annular structure is reduced. And the rainwater expansion water stop strip or the expansion rubber can absorb water to expand, so that the sealing element 6 can be expanded towards the inner side of the annular structure. The check valve 2 and the sealing element 6 are both arranged at the connecting part of the embedded part 3 and the extension pipe 4, namely the sealing element 6 is sleeved on the periphery of the check valve 2, after the sealing element 6 is elastically deformed and expanded, the check valve 2 is hooped, the mutual extrusion effect of the contact surfaces of the check valve 2 and the sealing element is enhanced, and the sealing performance is improved.
The screw cap 7 is used for plugging the grouting hole 1. Because the embedded part 3, the check valve 2, the duckbill valve 5 and the extension pipe 4 of the plugging device are all required to be installed in the grouting hole 1 in advance. In order to protect all parts of the plugging device from being damaged in the transportation process or prevent sundries from entering the plugging device to cause plugging, the end part of the embedded part 3 is matched with the screw cap 7 to cover and protect the grouting hole 1.
The duckbill valve 5 is formed by sequentially connecting and integrating an interface 51, a valve body 52 and a duckbill outlet 53. The whole body is made of rubber materials, and the elastic deformation capacity is excellent. The port 51 is flanged to the end of the extension tube 4, allowing the built-in valve body 52 and duckbill outlet 53 to communicate with the extension tube 4. After sequentially passing through the embedded part 3 and the extension pipe 4, the resistance-reducing slurry and the micro-expansion cement mortar enter the duckbill valve 5 through the interface 51, flow through the valve body 52 and then prop open the duckbill outlet 53 to be injected into a gap between the outer wall of the pipeline 9 and the inner wall of the channel 8. After the slip casting is accomplished, the hydraulic pressure in the pipeline 9 outside is greater than inboard, and liquid produces the extrusion effect to duckbilled export 53, and two rubber structure of duckbilled export 53 laminate mutually and strengthen sealed effect under the pressure action, prevent against current. Because the pipeline 9 is pushed into the channel 8 cut by the push bench, the outer wall of the pipeline 9 and the inner wall of the channel 8 generate random friction, if the duckbill outlet 53 of the duckbill valve 5 protrudes out of the outer avoiding surface of the pipeline 9, the duckbill outlet 53 is scratched by foreign objects to deform, the sealing performance of the duckbill outlet 53 is affected, and even the duckbill outlet 53 may be damaged to lose the non-return effect. Therefore, the duckbill outlet 53 is hidden in the grouting hole 1, so that the duckbill outlet 53 and the grouting hole 1 keep a safe distance between the orifices on the outer wall of the pipeline 9, and the duckbill outlet 53 is prevented from being scraped by foreign objects.
In order to enhance the sealing effect of the plugging device, prolong the service life and reduce the cost, the embedded part 3, the extension pipe 4, the check valve 2 and the screw cap 7 are all made of plastics. And waterproof glue is smeared at the flange joint of the extension pipe 4 and the interface 51 for adhesion and fixation.
Example 2:
the embodiment provides a method for plugging a large-caliber top pipe grouting hole on the basis of embodiment 1, and the method adopts the device for plugging the large-caliber top pipe grouting hole 1 of embodiment 1, and comprises the following specific implementation steps:
the method comprises the following steps: an embedded part 3, an extension pipe 4 and a duckbill valve 5 are pre-installed in a grouting hole 1 of a pipeline 9 to form a grouting channel communicated with the inner side and the outer side of the pipeline 9, and a screw cap 7 is screwed into the end part of the embedded part 3 to shield the grouting hole 1, so that the transportation is facilitated.
Step two: and injecting drag reduction slurry into a gap between the outer wall of the pipeline 9 and the inner wall of the channel 8 along the grouting channel.
Step three: and jacking the pipeline 9 under the lubricating action of the drag reduction mud until the pipeline 9 is jacked to a preset target position, and completing jacking operation of the pipeline 9.
Step four: micro-expansion cement mortar is injected again along the grouting channel and is used for replacing the anti-drag slurry injected into the gap between the outer wall of the pipeline 9 and the inner wall of the channel 8 in the pipe jacking operation, and stratum collapse caused by the generation of cavities around the pipeline 9 after the anti-drag slurry is lost is avoided.
Step five: after the drag reduction slurry is completely replaced by the micro-expansion cement mortar, namely after the micro-expansion cement mortar is filled in a gap between the outer wall of the pipeline 9 and the inner wall of the channel 8, the check valve 2 is screwed into the embedded part 3 from the orifice of the grouting hole 1 in the inner wall of the pipeline 9, the check valve 2 is spirally jacked, the micro-expansion cement mortar stored in the embedded part 3 and the extension pipe 4 is pushed and extruded until the check valve 2 is positioned at the joint of the embedded part 3 and the extension pipe 4, and the micro-expansion cement mortar is filled in the extension pipe 4.
Step six: and injecting micro-expansion cement mortar into the embedded part 3 again until the embedded part 3 is filled and leveled, so that the surface of the filled micro-expansion cement mortar is flush with the inner wall surface of the pipeline 9. And after the micro-expansion cement mortar is dried, plugging the grouting hole 1.
Various technical features in the above embodiments may be arbitrarily combined as long as there is no conflict or contradiction in the combination between the features, but is limited to the space and is not described one by one.
The present invention is not limited to the above-described embodiments, and various changes and modifications of the present invention are intended to be included within the scope of the claims and the equivalent technology of the present invention if they do not depart from the spirit and scope of the present invention.
Claims (9)
1. The utility model provides a heavy-calibre push pipe slip casting hole plugging device which characterized in that: comprises a check valve, an embedded part, an extension pipe and a duckbill valve which are arranged in a grouting hole; the embedded part, the extension pipe and the duckbill valve are sequentially connected, the embedded part is connected with the grouting hole and is located in the hole opening of the inner wall of the pipeline, the duckbill valve is connected with the grouting hole and is located in the hole opening of the outer wall of the pipeline, and the check valve is arranged at the joint of the embedded part and the extension pipe and is in adjustable fit with the embedded part.
2. The large-caliber pipe-jacking grouting hole plugging device according to claim 1, wherein the outer wall of the embedded part is fixedly connected with the inner wall of the grouting hole, and the inner wall of the embedded part is provided with internal threads; and the outer wall of the check valve is provided with external threads and is matched with the internal threads on the inner wall of the embedded part.
3. The plugging device for the large-caliber pipe-jacking grouting hole according to claim 1, wherein a sealing element is arranged at the joint of the embedded part and the extension pipe.
4. The large-caliber jacking pipe grouting hole plugging device according to claim 3, wherein the sealing element is an annular sealing ring made of a water-swelling water stop strip, or the sealing element is a structure formed by coating swelling rubber on the surface of an elastic sealing washer.
5. The large-caliber pipe-jacking grouting hole plugging device according to claim 1, further comprising a screw cap; and the outer wall of the spiral cover is provided with external threads, and the embedded part is detachably screwed into the orifice of the inner wall of the pipeline from the grouting hole.
6. The large-caliber push pipe grouting hole plugging device according to claim 1, wherein the duckbill valve is formed by sequentially and integrally connecting an interface, a valve body and a duckbill outlet; the interface is connected with the port flange of the extension pipe, the duckbill outlet is arranged in the grouting hole and is reserved with the grouting hole between the orifices on the outer wall of the pipeline with a redundant space.
7. The plugging device for the large-caliber jacking pipe grouting hole according to claim 6, wherein the joint of the interface and the port flange of the extension pipe is fixed by adhesion of waterproof glue.
8. The large-caliber pipe-jacking grouting hole plugging device according to claim 5, wherein the embedded part, the extension pipe, the check valve and the screw cap are all made of plastic.
9. The large caliber push-pipe grouting hole plugging device according to claim 1, wherein the duckbill valve is made of rubber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120601863.XU CN215486042U (en) | 2021-03-24 | 2021-03-24 | Large-diameter pipe-jacking grouting hole plugging device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120601863.XU CN215486042U (en) | 2021-03-24 | 2021-03-24 | Large-diameter pipe-jacking grouting hole plugging device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215486042U true CN215486042U (en) | 2022-01-11 |
Family
ID=79772814
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120601863.XU Expired - Fee Related CN215486042U (en) | 2021-03-24 | 2021-03-24 | Large-diameter pipe-jacking grouting hole plugging device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215486042U (en) |
-
2021
- 2021-03-24 CN CN202120601863.XU patent/CN215486042U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220111 |