CN217998220U - Foundation pit plugging grouting pipe - Google Patents
Foundation pit plugging grouting pipe Download PDFInfo
- Publication number
- CN217998220U CN217998220U CN202222107639.2U CN202222107639U CN217998220U CN 217998220 U CN217998220 U CN 217998220U CN 202222107639 U CN202222107639 U CN 202222107639U CN 217998220 U CN217998220 U CN 217998220U
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- Prior art keywords
- pipe
- conical head
- foundation pit
- movable conical
- slip casting
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- 229910000831 Steel Inorganic materials 0.000 claims description 19
- 239000010959 steel Substances 0.000 claims description 19
- 238000007569 slipcasting Methods 0.000 abstract description 20
- 239000004576 sand Substances 0.000 abstract description 14
- 239000007788 liquid Substances 0.000 abstract description 12
- 230000005484 gravity Effects 0.000 abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 20
- 239000002002 slurry Substances 0.000 description 10
- 238000000034 method Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000008234 soft water Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Images
Landscapes
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The technical scheme of the utility model is that: a foundation pit plugging grouting pipe comprises a pipe body, wherein a movable conical head is arranged at the front end of the pipe body, the pipe body is a double-layer sleeve pipe provided with an inner pipe and an outer pipe, the movable conical head is a telescopic movable conical head arranged at the front end of the pipe body, and the movable conical head is pressed against the front end of the pipe body when being contracted. The utility model has the advantages that: the slip casting pipe adopts the double casing pipe that is equipped with inner tube and outer tube, can satisfy the needs of biliquid thick liquid shutoff, and during the downstream, the slip casting pipe promotes movable taper sleeve and pierces through the sand bag, passes behind the sand bag, and the front end that the slip casting pipe was stretched out to movable conical head dependence slip casting pressure or self gravity whereabouts, and the front end of slip casting pipe is open, makes biliquid thick liquid can pour into the stratum into through the slip casting pipe in, convenient operation, the reliability is high.
Description
Technical Field
The utility model relates to a foundation ditch suddenly gushes plugging device, especially relates to a foundation ditch shutoff slip casting pipe.
Background
The foundation pit is dangerous to gush water, and the safety of the foundation pit, the surrounding environment and personnel is concerned. One method for plugging the water burst of the foundation pit is to drill a grouting hole at the water burst position and then inject double-liquid slurry into the grouting hole through a grouting pipe to realize the plugging and repairing of the foundation pit. After the grouting hole is drilled, a large amount of water gushes from the grouting hole, and the method for resisting the water gushing from the grouting hole is that a sand bag is pressed at the orifice of the grouting hole, and a grouting pipe with a function of penetrating the sand bag is needed when double-liquid slurry is poured, so that the structure and the function of the grouting pipe can directly influence the construction effect of foundation pit plugging.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a foundation ditch shutoff slip casting pipe provides a convenient operation, the two liquid thick liquid slip casting pipes of penetrable sand bag.
In order to realize the purpose, the technical scheme of the utility model is that: the utility model provides a foundation ditch shutoff slip casting pipe, includes the body, the front end of body is equipped with movable conical head, the body is the double-deck sleeve pipe that is equipped with inner tube and outer tube, movable conical head is flexible at the body front end, the roof pressure is in the front end of body when the movable conical head contracts.
Furthermore, the inner pipe and the outer pipe are coaxial, the upper ends of the inner pipe and the outer pipe are fixed by welding through a connecting rib plate, and a fixing pin is arranged between the inner pipe and the outer pipe.
Furthermore, a preferable combination structure of the inner pipe and the outer pipe is that the fixing pin is welded on the outer wall of the inner pipe, and the outer end of the fixing pin is pressed against the inner wall of the outer pipe.
Furthermore, the front end of the inner tube retracts into the outer tube, a guide groove is arranged on the tube wall of the front end of the outer tube, and the position of the guide groove corresponds to the retracting section of the inner tube.
Furthermore, a preferred movable conical head structure is that the movable conical head is provided with a cone, an outer guide shaft, an inner guide shaft and a guide pin, the outer guide shaft is in sliding fit with the inner hole of the outer tube, the inner guide shaft extends into the inner hole of the inner tube, the guide pin vertically penetrates through the inner guide shaft, and the guide pin moves along the guide groove.
Furthermore, in order to conduct the front end of the inner pipe, the inner guide shaft is provided with a guide groove, and when the sliding conical head is separated from the front end of the pipe body, the guide groove conducts the front end of the inner pipe.
Furthermore, the inner guide shaft is provided with three guide grooves which are equally distributed on the circumference.
Still further, a preferred inner tube and outer tube configuration is that the inner tube is a DN20 steel tube and the outer tube is a DN40 steel tube.
Still further, for effective penetration of sandbags, the taper of the movable cone head is no greater than 60 °.
The beneficial effects of the utility model are that: the slip casting pipe adopts the double-deck sleeve pipe that is equipped with inner tube and outer tube, can satisfy the needs of biliquid thick liquid shutoff, and during the downstream, the slip casting pipe promotes movable taper sleeve and impales the sand bag, passes the sand bag after, and the front end that stretches out the slip casting pipe is relied on slip casting pressure or self gravity whereabouts to movable conical head, and the front end of slip casting pipe is open, makes biliquid thick liquid can pour into the stratum into through the slip casting pipe in, convenient operation, the reliability is high.
The present invention will be described in detail with reference to the accompanying drawings and examples.
Drawings
FIG. 1 is a view of the external structure of the present invention;
FIG. 2 is a sectional view of the front and upper end structure of the present invention;
FIG. 3 is an exploded view of the tube body and the movable cone head of the present invention;
FIG. 4 is a structural view of the free falling state of the movable cone head of the present invention;
FIG. 5 is a schematic view of the utility model, in which the movable cone head is pressed against the sandbag;
FIG. 6 is a schematic view of the utility model, the movable cone head punctures the sandbag;
fig. 7 is a schematic view of the utility model, the movable cone head moves downwards to separate from the front end of the grouting pipe.
Detailed Description
As shown in fig. 1 to 4, a foundation pit plugging grouting pipe includes a pipe body 10, a movable conical head 20 is provided at a front end of the pipe body, the pipe body is a double-layer sleeve pipe provided with an inner pipe 11 and an outer pipe 12, the movable conical head is a movable conical head which extends and contracts at the front end of the pipe body, and the movable conical head is pressed against the front end of the pipe body when contracting (as shown in fig. 1 and 2).
The inner pipe and the outer pipe are coaxial, the upper ends of the inner pipe and the outer pipe are fixed by welding through connecting rib plates 13, and a fixing pin 14 is arranged between the inner pipe and the outer pipe.
The fixing pin 14 is welded on the outer wall of the inner pipe, and the outer end of the fixing pin is pressed against the inner wall of the outer pipe.
The front end of the inner tube retracts into the outer tube, a guide groove 15 is formed in the tube wall of the front end of the outer tube, and the guide groove corresponds to the retracting section S1 of the inner tube.
The movable conical head is provided with a cone 21, an outer guide shaft 22, an inner guide shaft 23 and a guide pin 24, the outer guide shaft is in sliding fit with an inner hole of the outer tube, the inner guide shaft extends into the inner hole of the inner tube, the guide pin vertically penetrates through the inner guide shaft, and the guide pin moves along the guide groove.
The inner guide shaft is provided with a guide groove 25, and when the sliding cone head is separated from the front end of the pipe body, the guide groove enables the front end of the inner pipe to be communicated.
The inner guide shaft is provided with three guide grooves which are equally distributed on the circumference.
The inner pipe is a DN20 steel pipe, and the outer pipe is a DN40 steel pipe.
The taper alpha of the movable conical head is not more than 60 degrees.
The first embodiment is as follows:
referring to fig. 1 to 4, a foundation pit plugging grouting pipe comprises a pipe body 10, wherein the pipe body is a double-layer sleeve provided with an inner pipe 11 and an outer pipe 12, the inner pipe is a DN20 steel pipe, the outer pipe is a DN40 steel pipe, the inner pipe and the outer pipe are coaxial, and a space for slurry to flow is reserved between the inner pipe and the outer pipe. The upper ends of the inner pipe and the outer pipe are welded and fixed through a connecting rib plate 13, a plurality of fixing pins 14 are arranged on the pipe wall of the inner pipe, every three fixing pins are distributed in groups in equal intervals around the circumference of the inner pipe (as shown in figure 3), the fixing pins 14 are welded on the inner pipe, and the outer ends of the fixing pins are propped against the inner wall of the outer pipe, so that the inner pipe and the outer pipe are kept coaxial. The front end of the inner tube retracts into the outer tube, a guide groove 15 is formed in the tube wall of the front end of the outer tube, the guide groove 15 penetrates through the tube walls on the two sides of the outer tube, the position of the guide groove corresponds to the retracting section S1 of the inner tube, and the front end of the inner tube avoids the space through which the guide groove penetrates.
The front end of the tube body is provided with a movable conical head 20, and the movable conical head 20 can move in a telescopic way at the front end of the tube body. The movable cone head is provided with a cone 21, an outer guide shaft 22, an inner guide shaft 23 and a guide pin 24, and the taper of the movable cone head (i.e. the taper of the cone 21) is alpha =60 ° in order to facilitate the penetration of the sandbag. The outer guide shaft 22 is in sliding fit with the inner hole of the outer tube, the inner guide shaft 23 extends into the inner hole of the inner tube, and the inner guide shaft is in sliding fit with the inner hole of the inner tube. The inner guide shaft is provided with a guide pin hole 26, the guide pin 24 vertically penetrates through the inner guide shaft through the guide pin hole 26, and the guide pin 24 is in static fit with the guide pin hole 26, so that the guide pin cannot be separated from the inner guide shaft 23 in use. The guide pin moves along the guide slot 15 at both ends thereof.
The rear part of the inner guide shaft is provided with three guide grooves 25 which are equally distributed on the circumference.
When the movable cone head 20 is pressed downward against an object (such as a sandbag), the movable cone head is contracted and pressed against the front end of the pipe body (as shown in fig. 1 and 2), i.e. the cone 21 is pressed against the lower end of the outer pipe 12. When the movable cone head is separated from the abutting object, the movable cone head is separated from the front end of the tube body under the action of gravity (as shown in fig. 4), at the moment, the cone 21 is separated from the lower end of the outer tube 12, and the front end of the outer tube is in a conducting state; the inner guide shaft 23 moves downward and the guide groove 25 guides the front end of the inner tube. The tail part of the inner guide shaft 23 is still in the inner hole of the inner tube, and the inner guide shaft 23 and the guide pin 24 prevent the movable conical head from falling off the tube body.
The slip casting pipe adopts the double-deck sleeve pipe that is equipped with inner tube and outer tube, can satisfy the needs of biliquid thick liquid shutoff, and the sand bag can be impaled to the activity conical head, makes the slip casting pipe get into the slip casting downthehole, and the activity conical head can make the front end of slip casting pipe open under the action of gravity, convenient operation, and the reliability is high.
Example two:
referring to fig. 5 to 7, this embodiment is an example of the foundation pit plugging grouting pipe according to the first embodiment, in a subway construction project, a depressurization well 14 is arranged in the foundation pit, a side wall of a downward turning beam near the depressurization well (with a distance of about 40 cm) is subjected to inrush after excavation is completed, and in order to ensure the safety of the foundation pit and surrounding buildings, a foundation pit inrush recharge plugging method is adopted.
The method comprises the following steps:
firstly, an external water source is extracted to recharge the foundation pit, so that the safety of the foundation pit and surrounding buildings is ensured.
Then a steel protective cylinder 30 is manufactured, and the protective cylinder 30 is lifted by a gantry crane to the position (gushing point) of water and sand gushing of the foundation pit, so that the gushing point and the depressurization well 14 are covered.
Then, injecting double-liquid slurry into the steel casing, injecting slurry into a contact area between the steel casing and the soil body, blocking communication between the water body inside the steel casing and the water body outside the steel casing, and forming a double-liquid slurry back cover 31 on the soil body at the bottom of the steel casing, as shown in fig. 5.
Then, a water pump is placed in the steel protection cylinder, open water in the steel protection cylinder is pumped out, the water pump is left at the bottom of the protection cylinder to prevent water from flowing, and safety of operators is guaranteed.
Then, an operator goes to the bottom of the steel casing for operation, a grouting hole 40 is drilled in the steel casing, the grouting hole penetrates through the double-fluid slurry back cover and is driven into the bottom plate of the foundation pit, and after the grouting hole is drilled, the sand bag 41 is immediately used for carrying out back pressure on the hole opening of the grouting hole to prevent water burst and sand burst.
Then, the grouting pipe described in the second embodiment is used for grouting, the length of the grouting pipe is the depth of the grouting hole plus the height of the steel casing, the movable cone head at the front end of the grouting pipe is pressed against the sandbag 41 (as shown in fig. 5), the sandbag is punctured downwards with force (as shown in fig. 6), and the grouting pipe is inserted into the grouting hole 40. After the grouting pipe passes through the sandbag, the movable conical head 20 moves downwards under the action of gravity, and the front end of the grouting pipe is separated (as shown in fig. 7), so that the front ends of the inner pipe and the outer pipe form an open port. If the movable cone head is difficult to directly pass through the sand bag, a pipe descending mode can be adopted, so that the movable cone head drives the grouting pipe to pass through the sand bag and enter the grouting hole 40. Under certain geological conditions, the grouting hole can be driven into a soft water-containing stratum, the lower end of the grouting hole is not provided with a regular hole shape, and a free falling space of the movable conical head is not provided, but the movable conical head still can be smoothly separated from the front end of the grouting pipe under the pressure action of grouting liquid.
Then, as shown in fig. 7, a two-fluid slurry 42 is injected into the injection hole through the injection pipe in a manner of pushing from the top end to the bottom end, the injection slurry is a two-fluid slurry, and the setting time is about 30 seconds.
After the grouting pipes are completely grouted, in order to ensure that the water seepage channel is completely sealed, whether bubbles emerge in the pit or not is observed, and by observing the water levels inside and outside the foundation pit, if the water level does not rise within 24 hours, the gushing water seepage channel in the foundation pit is sealed. And after observing and confirming that the water gushing and sand gushing are completely blocked, pumping the refilling open water in the foundation pit gradually.
Claims (9)
1. The foundation pit plugging grouting pipe is characterized by comprising a pipe body, wherein a movable conical head is arranged at the front end of the pipe body, the pipe body is a double-layer sleeve pipe provided with an inner pipe and an outer pipe, the movable conical head is a movable conical head which is telescopic at the front end of the pipe body, and the movable conical head is pressed against the front end of the pipe body when being contracted.
2. The foundation pit plugging grouting pipe according to claim 1, wherein the inner pipe and the outer pipe are coaxial, the inner pipe and the outer pipe are welded and fixed at the upper ends through connecting rib plates, and a fixing pin is arranged between the inner pipe and the outer pipe.
3. The foundation pit plugging grouting pipe of claim 2, wherein the fixing pin is welded on the outer wall of the inner pipe, and the outer end of the fixing pin abuts against the inner wall of the outer pipe.
4. The foundation pit plugging grouting pipe according to claim 1, wherein the front end of the inner pipe is retracted into the outer pipe, a guide groove is formed in the pipe wall of the front end of the outer pipe, and the guide groove corresponds to the retracted section of the inner pipe.
5. A foundation pit plugging grouting pipe according to claim 4, wherein the movable conical head is provided with a cone, an outer guide shaft, an inner guide shaft and a guide pin, the outer guide shaft is in sliding fit with the inner hole of the outer pipe, the inner guide shaft extends into the inner hole of the inner pipe, the guide pin vertically penetrates through the inner guide shaft, and the guide pin moves along the guide groove.
6. The foundation pit plugging grouting pipe according to claim 5, wherein the inner guide shaft is provided with a guide groove, and when the movable conical head is separated from the front end of the pipe body, the guide groove conducts the front end of the inner pipe.
7. The foundation pit plugging grouting pipe of claim 6, wherein the inner guide shaft is provided with three circumferentially equally distributed guide grooves.
8. The foundation pit plugging grouting pipe according to claim 1, wherein the inner pipe is a DN20 steel pipe, and the outer pipe is a DN40 steel pipe.
9. The foundation pit plugging grouting pipe of claim 1, wherein the taper of the movable conical head is not more than 60 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222107639.2U CN217998220U (en) | 2022-08-11 | 2022-08-11 | Foundation pit plugging grouting pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222107639.2U CN217998220U (en) | 2022-08-11 | 2022-08-11 | Foundation pit plugging grouting pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217998220U true CN217998220U (en) | 2022-12-09 |
Family
ID=84320522
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222107639.2U Active CN217998220U (en) | 2022-08-11 | 2022-08-11 | Foundation pit plugging grouting pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217998220U (en) |
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2022
- 2022-08-11 CN CN202222107639.2U patent/CN217998220U/en active Active
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