CN220117216U - Casing grouting drag reduction structure - Google Patents
Casing grouting drag reduction structure Download PDFInfo
- Publication number
- CN220117216U CN220117216U CN202321616894.8U CN202321616894U CN220117216U CN 220117216 U CN220117216 U CN 220117216U CN 202321616894 U CN202321616894 U CN 202321616894U CN 220117216 U CN220117216 U CN 220117216U
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- CN
- China
- Prior art keywords
- grouting
- casing
- sleeve
- pipes
- pipe
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- 239000002002 slurry Substances 0.000 claims abstract description 25
- 239000002689 soil Substances 0.000 claims abstract description 18
- 238000003466 welding Methods 0.000 claims description 14
- 230000001681 protective effect Effects 0.000 claims description 8
- 230000036346 tooth eruption Effects 0.000 claims description 6
- 238000007569 slipcasting Methods 0.000 claims 3
- 238000005553 drilling Methods 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 5
- 229910000278 bentonite Inorganic materials 0.000 abstract description 3
- 239000000440 bentonite Substances 0.000 abstract description 3
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 abstract description 3
- 230000001050 lubricating effect Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 3
- 239000011440 grout Substances 0.000 abstract 1
- 230000008595 infiltration Effects 0.000 abstract 1
- 238000001764 infiltration Methods 0.000 abstract 1
- 238000002347 injection Methods 0.000 abstract 1
- 239000007924 injection Substances 0.000 abstract 1
- 238000010276 construction Methods 0.000 description 6
- 239000004576 sand Substances 0.000 description 3
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 239000000314 lubricant Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
Abstract
The utility model relates to the technical field of casing wall protection, and discloses a casing grouting drag reduction structure, which comprises a casing for being inserted into a soil layer, wherein the outer side wall of the casing is provided with a plurality of grouting pipes, the bottoms of the grouting pipes extend to the bottoms of the casing, grouting ports are formed in the bottoms of the grouting pipes, the tops of the grouting pipes extend along the axial direction of the casing and are connected with grouting equipment, and the grouting equipment is used for providing grout; thus, the slurry is mixed by bentonite and water, the slurry is pumped into the bottom of the sleeve through the slurry injection pipe in the process of sinking the sleeve by adopting the full rotary drilling machine, the sleeve and surrounding soil are filled with the slurry along with the increase of the slurry infiltration amount, and the slurry forms a lubricating layer around the side wall of the sleeve when the sleeve is rotated and sunk, so that the drag reduction effect is achieved.
Description
Technical Field
The utility model relates to the technical field of casing wall protection, in particular to a casing grouting drag reduction structure.
Background
The main pier foundation of the offshore bridge pile is designed into an offshore platform large-diameter rock-socketed filling pile, and the offshore bridge pile is constructed by constructing a platform on the sea during construction, determining a pile position and then constructing at the pile position. In coastal areas, geological conditions are complex, submarine reefs, sand ridges, sand dunes, ravines are criss-cross, geological conditions in different areas are greatly changed, and shallow surface soil is mostly soft soil foundation.
In general, a vibrating hammer is adopted to put into a deep and long pile casing, and a rotary drilling rig is used for drilling holes. Because of the special construction operation environment conditions, the construction is often influenced by deep sea mud layers and sand layers, and the problems of hole collapse, necking, exceeding of sediment and the like are easy to occur when holes are drilled.
In the prior art, the problem of hole collapse is effectively avoided by adopting full casing follow-up, namely, the casing is sunk into the soil layer through the full rotary drilling machine until the bottom of the casing is abutted on the rock stratum, but the problems of difficult sinking and low efficiency exist due to deeper casing insertion depth.
Disclosure of Invention
The utility model aims to provide a sleeve grouting drag reduction structure, and aims to solve the problem that in the prior art, when a full sleeve is adopted to follow up a retaining wall during construction of a large-diameter hundred-meter rock-socketed pile of an offshore platform, the sinking efficiency is low.
The utility model is realized in such a way that the sleeve grouting drag reduction structure comprises a sleeve which is used for being inserted into a soil layer, wherein the outer side wall of the sleeve is provided with a plurality of grouting pipes for slurry circulation, the bottoms of the grouting pipes extend to the bottoms of the sleeve, grouting ports are formed in the bottoms of the grouting pipes, and the tops of the grouting pipes extend along the axial direction of the sleeve and are connected with grouting equipment, and the grouting equipment is used for providing slurry.
Optionally, the grouting pipe is welded and fixed on the outer side wall of the sleeve.
Optionally, the outer side wall of the sleeve is provided with a plurality of protection bars, the protection bars are arranged along the axial extension of the sleeve, a plurality of protection bars are respectively arranged at two sides of the grouting pipe and are arranged at intervals with the grouting pipe, and the diameter of the protection bars is larger than that of the grouting pipe.
Optionally, the guard bar is welded and fixed on the outer side wall of the sleeve.
Optionally, a thread is formed on the outer circumference of the guard bar, and the thread is arranged to extend along the extending direction of the guard bar.
Optionally, two grouting pipes are arranged side by side on one side of the sleeve to form a first grouting row; the two grouting pipes are arranged on the other side of the sleeve side by side to form a second grouting row; the two sides of the first grouting row and the second grouting row are respectively provided with the protective strips.
Optionally, the first grouting row and the second grouting row are symmetrically arranged at two sides of the sleeve.
Optionally, a plurality of soil cutting teeth are arranged at the bottom of the sleeve, the soil cutting teeth are arranged at intervals along the circumference of the sleeve, and the soil cutting teeth are formed by welding and cutting.
Optionally, the sleeve comprises a plurality of joint pipes which are arranged in a vertical connection mode, the joint pipes are cylindrical, adjacent joint pipes are fixedly connected through welding, and a plurality of joint pipes are coaxially and concentrically arranged.
Optionally, the grouting pipe comprises a plurality of grouting sections, the grouting sections are arranged on the outer side wall of the joint pipe, and the grouting sections on the adjacent joint pipes are fixedly connected and communicated through welding; the protection strip comprises a plurality of protection sections, the protection sections are arranged on the outer side wall of the joint pipe, and the adjacent protection sections on the joint pipe are fixedly connected and communicated through welding.
Compared with the prior art, the casing grouting drag reduction structure provided by the utility model has the advantages that the slurry is prepared by mixing bentonite and water, the slurry is pumped into the bottom of the casing through the grouting pipe in the casing sinking process by adopting the full-circle drilling machine, the space between the casing and surrounding soil is filled with the slurry along with the increase of the slurry penetration amount, and the slurry forms a lubricating layer around the side wall of the casing when the casing is in circle sinking, so that the drag reduction effect is achieved.
Drawings
FIG. 1 is a partial schematic view of a sleeve provided by the present utility model;
fig. 2 is a partial schematic view of a sleeve provided by the present utility model.
Detailed Description
The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
The implementation of the present utility model will be described in detail below with reference to specific embodiments.
The same or similar reference numerals in the drawings of the present embodiment correspond to the same or similar components; in the description of the present utility model, it should be understood that, if there is an azimuth or positional relationship indicated by terms such as "upper", "lower", "left", "right", etc., based on the azimuth or positional relationship shown in the drawings, it is only for convenience of describing the present utility model and simplifying the description, but it is not indicated or implied that the apparatus or element referred to must have a specific azimuth, be constructed and operated in a specific azimuth, and thus terms describing the positional relationship in the drawings are merely illustrative and should not be construed as limiting the present utility model, and specific meanings of the terms described above may be understood by those of ordinary skill in the art according to specific circumstances.
Referring to fig. 1-2, a preferred embodiment of the present utility model is provided.
The utility model provides a grouting drag reduction structure of a sleeve 100, which comprises the sleeve 100 for being inserted into a soil layer, wherein a plurality of grouting pipes 110 for slurry circulation are arranged on the outer side wall of the sleeve 100, the bottoms of the grouting pipes 110 extend to the bottoms of the sleeve 100, grouting ports are formed in the bottoms of the grouting pipes 110, the tops of the grouting pipes 110 extend along the axial direction of the sleeve 100 and are connected with grouting equipment, and the grouting equipment is used for providing slurry.
The casing 100 grouting drag reduction structure provided by the above, the slurry is formed by mixing bentonite and water, the slurry is pumped into the bottom of the casing 100 through the grouting pipe 110 in the process of sinking the casing 100 by adopting the full-rotation drilling machine, the casing 100 and the surrounding soil are filled with the slurry along with the increase of the slurry penetration amount, and the slurry forms a lubricating layer around the side wall of the casing 100 when the casing 100 rotates and sinks, so that the drag reduction effect is achieved.
Specifically, this structure applies to offshore platform major diameter hundred meter rock-socketed pile combination pile construction, because construction environment is special, and sleeve pipe 100 insertion depth is darker, inserts to sleeve pipe 100 bottom butt on the stratum, can effectually avoid collapsing the hole problem, and the stratum adopts the rig to bore, can form the stake hole, but, when avoiding collapsing the hole, sleeve pipe 100 needs the male too dark, and sinking efficiency is slower.
The grouting pipe 110 is welded to the outer sidewall of the sleeve 100. In this way, the connection between the grouting pipe 110 and the sleeve 100 is ensured.
The outer side wall of the sleeve 100 is provided with a plurality of protective strips 120, the protective strips 120 are arranged along the axial extension of the sleeve 100, the protective strips 120 are respectively arranged at two sides of the grouting pipe 110 and are arranged at intervals with the grouting pipe 110, and the diameter of the protective strips 120 is larger than that of the grouting pipe 110. Thus, the protective strip 120 plays a role in protection, and effectively avoids that the surrounding hard soil body breaks the grouting pipe 110 when the sleeve 100 rotates to sink, so that the slurry cannot wash to the bottom of the sleeve 100.
The guard bar 120 is welded to the outer sidewall of the sleeve 100. Ensuring the connection between the guard bar 120 and the sleeve 100.
The guard bar 120 has a thread formed on an outer circumference thereof, the thread being disposed to extend along an extending direction of the guard bar 120. The threads may act to cut the soil and break up the large bumps, further protecting the grouting pipe 110.
Specific examples: two grouting pipes 110 are arranged side by side on one side of the sleeve 100 to form a first grouting row; two grouting pipes 110 are arranged side by side on the other side of the sleeve 100 to form a second grouting row; the two sides of the first grouting row and the second grouting row are respectively provided with a protective strip 120. In this way, the slurry is more uniformly sprayed as the sleeve 100 is rotated.
Specifically, the first grouting row and the second grouting row are symmetrically arranged at both sides of the sleeve 100. In this way, the lubricant layer formed can better spread over the entire sidewall of the sleeve 100.
The bottom of the sleeve 100 is provided with a plurality of soil-cutting teeth 130, and the plurality of soil-cutting teeth 130 are spaced apart along the circumference of the sleeve 100. Thus, the soil cutting teeth 130 can have a good breaking and sinking effect when the sleeve 100 is rotated and sunk.
The soil-cutting teeth 130 are formed by a solder cut.
The sleeve 100 includes a plurality of joint pipes arranged in a vertically connected manner, the joint pipes are cylindrical, adjacent joint pipes are fixedly connected by welding, and the joint pipes are coaxially and concentrically arranged. Thus, because the required sleeve 100 has a longer length, in a specific implementation, the sleeve is sequentially lowered into the pile hole, a length is reserved for welding the next section of joint pipe, after the adjacent sections of joint pipes are aligned, the adjacent sections of joint pipes are mutually fixed through welding, and then the sleeve is continuously lowered, and the sleeve is repeatedly lowered for a plurality of times to reach a set depth.
The grouting pipe 110 comprises a plurality of grouting sections, grouting sections are arranged on the outer side wall of each joint pipe, and grouting sections on adjacent joint pipes are fixedly connected and communicated through welding; the guard bar 120 comprises a plurality of guard segments, the guard segments are arranged on the outer side walls of the joint pipes, and the guard segments on the adjacent joint pipes are fixedly connected and communicated through welding. Thus, because the required sleeve 100 has a longer length, in a specific implementation, the sleeve 100 is sequentially lowered into the pile hole, a length is reserved for welding the next section of the joint pipe, after the adjacent sections of the joint pipe are aligned and fixed with each other by welding, the adjacent grouting sections and the protection sections are respectively welded and communicated, so that the slurry can be sprayed to the bottom of the sleeve 100, and the protection effect of the protection strip 120 is ensured.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.
Claims (10)
1. The casing grouting drag reduction structure is characterized by comprising a casing which is used for being inserted into a soil layer, wherein a plurality of grouting pipes for slurry circulation are arranged on the outer side wall of the casing, the bottoms of the grouting pipes extend to the bottoms of the casing, and grouting openings are formed in the bottoms of the grouting pipes; the top of the grouting pipe extends along the axial direction of the sleeve and is connected with grouting equipment, and the grouting equipment is used for providing slurry.
2. The casing grouting drag reducing structure of claim 1, wherein the grouting pipe is welded to the outer sidewall of the casing.
3. The casing grouting drag reduction structure of claim 2, wherein the outer side wall of the casing is provided with a plurality of guard bars, the guard bars are arranged along the axial extension of the casing, the plurality of guard bars are respectively arranged at two sides of the grouting pipe and are arranged at intervals with the grouting pipe, and the diameter of the guard bars is larger than that of the grouting pipe.
4. The casing slip casting drag reducing structure of claim 3, wherein said guard bars are welded to the outer sidewall of said casing.
5. The casing slip casting drag reducing structure of claim 3, wherein the guard bar has threads formed on an outer circumference thereof, the threads extending along an extension direction of the guard bar.
6. The casing grouting drag reducing structure of claim 3, wherein two of said grouting pipes are arranged side by side on one side of said casing forming a first grouting row; the two grouting pipes are arranged on the other side of the sleeve side by side to form a second grouting row; the two sides of the first grouting row and the second grouting row are respectively provided with the protective strips.
7. The casing grouting drag reducing structure of claim 6, wherein the first grouting row and the second grouting row are symmetrically arranged on both sides of the casing.
8. The casing slip casting drag reducing structure of claim 1, wherein the bottom of the casing has a plurality of soil cutting teeth spaced apart along the circumference of the casing, the soil cutting teeth being formed by a weld cut.
9. The casing grouting drag reducing structure of claim 3, wherein the casing comprises a plurality of joint pipes which are arranged in a vertical connection mode, the joint pipes are cylindrical, adjacent joint pipes are fixedly connected through welding, and the joint pipes are coaxially and concentrically arranged.
10. The casing grouting drag reduction structure of claim 9, wherein the grouting pipe comprises a plurality of grouting sections, the grouting sections are arranged on the outer side wall of the joint pipe, and the grouting sections on adjacent joint pipes are fixedly connected and communicated through welding; the protection strip comprises a plurality of protection sections, the protection sections are arranged on the outer side wall of the joint pipe, and the adjacent protection sections on the joint pipe are fixedly connected and communicated through welding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321616894.8U CN220117216U (en) | 2023-06-21 | 2023-06-21 | Casing grouting drag reduction structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321616894.8U CN220117216U (en) | 2023-06-21 | 2023-06-21 | Casing grouting drag reduction structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220117216U true CN220117216U (en) | 2023-12-01 |
Family
ID=88892727
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321616894.8U Active CN220117216U (en) | 2023-06-21 | 2023-06-21 | Casing grouting drag reduction structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220117216U (en) |
-
2023
- 2023-06-21 CN CN202321616894.8U patent/CN220117216U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant |