CN220266605U - Be used for river course hard rock stratum bridge aquatic foundation ditch steel cofferdam device - Google Patents
Be used for river course hard rock stratum bridge aquatic foundation ditch steel cofferdam device Download PDFInfo
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- CN220266605U CN220266605U CN202321811543.2U CN202321811543U CN220266605U CN 220266605 U CN220266605 U CN 220266605U CN 202321811543 U CN202321811543 U CN 202321811543U CN 220266605 U CN220266605 U CN 220266605U
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- steel pipe
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- hard rock
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 110
- 239000010959 steel Substances 0.000 title claims abstract description 110
- 239000011435 rock Substances 0.000 title claims abstract description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 7
- 238000003780 insertion Methods 0.000 claims description 11
- 230000037431 insertion Effects 0.000 claims description 11
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 238000005553 drilling Methods 0.000 abstract description 15
- 230000008859 change Effects 0.000 abstract description 2
- 239000010438 granite Substances 0.000 description 18
- 238000000034 method Methods 0.000 description 15
- 230000008569 process Effects 0.000 description 13
- 238000010276 construction Methods 0.000 description 5
- 239000007769 metal material Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- FFBHFFJDDLITSX-UHFFFAOYSA-N benzyl N-[2-hydroxy-4-(3-oxomorpholin-4-yl)phenyl]carbamate Chemical compound OC1=C(NC(=O)OCC2=CC=CC=C2)C=CC(=C1)N1CCOCC1=O FFBHFFJDDLITSX-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 206010008190 Cerebrovascular accident Diseases 0.000 description 1
- 208000006011 Stroke Diseases 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Piles And Underground Anchors (AREA)
Abstract
The utility model discloses a steel cofferdam device for a river hard rock stratum bridge underwater foundation pit, and relates to the technical field of cofferdams. This a foundation ditch steel cofferdam device in water for river course hard rock stratum bridge, including a plurality of steel-pipe piles one, the inner wall of steel-pipe pile one is connected with steel-pipe pile two and steel-pipe pile three, concrete layer one has been pour between steel-pipe pile one and the steel-pipe pile two, concrete layer two has been pour between steel-pipe pile two and the steel-pipe pile three, through steel-pipe pile one, steel-pipe pile two and steel-pipe pile three, can use the steel-pipe pile of corresponding diameter according to the hardness of stratum, thereby change the rock diameter of going into of steel-pipe pile cofferdam drilling, utilize the principle that the drilling of minor diameter was gone into easily, the drilling form of traditional drilling single aperture has been changed, make to arrange the steel-pipe pile cofferdam and go into rock more easily when meetting hard rock stratum, through pouring concrete between steel-pipe pile can effectively promote stability after the cofferdam is built, thereby guarantee bridge later stage safe operation.
Description
Technical Field
The utility model relates to the technical field of cofferdams, in particular to a steel cofferdam device for a river hard rock stratum bridge underwater foundation pit.
Background
The cofferdam is a temporary enclosure structure built for building a permanent hydraulic facility in hydraulic engineering construction. The water and soil are prevented from entering the building construction position, so that water is drained in the cofferdam, a foundation pit is excavated, and the building is constructed.
The prior steel cofferdam is mostly driven into the ground through steel pipe piles with single diameter so as to facilitate the construction of subsequent bridges, for example, chinese patent application number is CN201721581549.X discloses a lattice type steel pipe pile temporary supporting system for a river-crossing large-span bridge, which comprises a group of buttress systems arranged at intervals along the width direction of a river channel, wherein the buttress systems comprise a strip-shaped foundation arranged along the water flow direction, two rows of steel pipe piles connected to the top surface of the foundation along the length direction of the foundation, and connecting chords connected between two adjacent steel pipe piles in the same row and between two adjacent steel pipe piles in different-row corresponding positions.
Because the diameter of the steel pipe pile is fixed, when the steel pipe pile encounters a hard rock stratum in the process of driving the steel pipe pile into the ground, the diameter of the steel pipe pile can limit the drilling efficiency of the steel pipe pile, so that the steel pipe pile can be difficult to continue to go deep into the ground, and the steel pipe pile is not beneficial to drilling into the harder rock stratum.
Disclosure of Invention
Aiming at the defects of the prior art, the utility model provides a foundation pit steel cofferdam device used for a river hard rock stratum bridge in water, which solves the problem that a single-diameter steel pipe pile is difficult to drill into a harder stratum.
In order to achieve the above purpose, the utility model is realized by the following technical scheme: the utility model provides a be used for river course hard rock stratum bridge aquatic foundation ditch steel cofferdam device, includes a plurality of steel-pipe piles one, the inner wall of steel-pipe pile one is connected with steel-pipe pile two and steel-pipe pile three, concreting layer one has been pour between steel-pipe pile one and the steel-pipe pile two, concreting layer two has been pour between steel-pipe pile two and the steel-pipe pile three.
Preferably, the outer surfaces of the second steel pipe pile and the third steel pipe pile are symmetrically provided with threaded grooves, and the inner walls of the first steel pipe pile and the second steel pipe pile are symmetrically connected with protruding blocks matched with the threaded grooves.
Preferably, the outer surfaces of the second steel pipe pile and the third steel pipe pile are symmetrically provided with insertion grooves, and the upper ends of the insertion grooves are communicated with the thread grooves.
Preferably, the lower ends of the first steel pipe pile, the second steel pipe pile and the third steel pipe pile are respectively connected with a drill bit.
Preferably, the outer surfaces of the steel pipe piles are connected with the same inner supporting plate I, and the inner walls of the inner supporting plate I are sequentially connected with four inner supporting columns I.
Preferably, the outer surfaces of the steel pipe piles I are connected with the same inner support plate II, and the inner walls of the inner support plate II are sequentially connected with four inner support columns II.
Compared with the prior art, the foundation pit steel cofferdam device for the river hard rock stratum bridge underwater has the following beneficial effects:
through steel-pipe pile one, steel-pipe pile two and steel-pipe pile three, can use the steel-pipe pile of corresponding diameter according to the hardness of stratum to change the rock diameter of going into of steel-pipe pile cofferdam drilling, utilized the principle that the minor diameter drilling was bored easily, changed the drilling form of traditional drilling single aperture, made to arrange the steel-pipe pile cofferdam and to go into rock more easily when meetting hard rock stratum, can effectively promote the stability after the steel-pipe pile cofferdam was built through pouring concrete between the steel-pipe pile, thereby guarantee bridge later stage safe operation.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is a schematic view of a steel pipe pile according to the present utility model;
FIG. 3 is a schematic view of a concrete layer according to the present utility model;
FIG. 4 is a schematic view of an upper end internal structure of a steel pipe pile according to the present utility model;
fig. 5 is a schematic view of a lower end structure of a steel pipe pile according to the present utility model;
FIG. 6 is a vertical layout view of a cofferdam steel pipe pile design of the present utility model;
FIG. 7 is a plan view of a cofferdam steel pipe pile design of the present utility model;
FIG. 8 is a schematic elevation view of the process 1 according to the present utility model
FIG. 9 is a schematic plan view of process 1 of the present utility model;
FIG. 10 is a process 2 floor plan of the present utility model;
FIG. 11 is a plan view of process 2 of the present utility model;
FIG. 12 is a process 3 floor plan of the present utility model;
FIG. 13 is a plan view of process 3 of the present utility model;
FIG. 14 is a process 4 floor plan of the present utility model;
FIG. 15 is a plan view of process 4 of the present utility model;
FIG. 16 is a process 5 floor plan of the present utility model;
FIG. 17 is a plan view of step 5 of the present utility model.
In the figure: 1. a first steel pipe pile; 2. a second steel pipe pile; 3. thirdly, a steel pipe pile III; 4. a concrete layer I; 5. a second concrete layer; 6. a thread groove; 7. a bump; 8. an insertion groove; 9. a drill bit; 10. an inner support plate I; 11. an inner support column I; 12. an inner support plate II; 13. and an inner support column II.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Referring to fig. 1-5, the present utility model provides a technical solution: the utility model provides a be used for river course hard rock stratum bridge aquatic foundation ditch steel cofferdam device, includes a plurality of steel-pipe pile one 1, and the inner wall of steel-pipe pile one 1 is connected with steel-pipe pile two 2 and steel-pipe pile three 3, has pour concrete layer one 4 between steel-pipe pile one 1 and the steel-pipe pile two 2, has pour concrete layer two 5 between steel-pipe pile two 2 and the steel-pipe pile three 3, and the diameter of steel-pipe pile one 1, steel-pipe pile two 2 and steel-pipe pile three 3 is 800mm, 600mm and 400mm respectively.
In operation, a layout diagram of the design steel pipe pile of the 34# foundation pit cofferdam of the ultra-large bridge of the east China sea, which is connected with Xu Gaotie, is shown in fig. 6 and 7, the diameter of the design steel pipe pile is 800mm, the design depth is 27m, and the design steel pipe pile needs to penetrate through a strong weathered granite layer to enter a weathered granite rock layer. In the actual construction process, the steel pipe pile with the diameter of 800mm can only drill into a softer strong wind granite rock stratum at the deepest, and cannot drill into a harder wind granite rock stratum.
Thus, as shown in FIGS. 8 and 9, step 1 is to drill a steel pipe pile having a diameter of 800mm from the water surface to the junction between the strongly weathered granite layer and the weathered granite layer, and the drill depth is 19m.
As shown in fig. 10 and 11, the steel pipe pile diameter is reduced to 600mm, and the weathered granite rock layer is drilled from the junction of the strong weathered granite layer and the weathered granite rock layer to 4m, and the drilling depth is 23m.
As shown in fig. 12 and 13, in step 3, the gap between the steel pipe piles of step 1 and step 2 is filled with C25 concrete to a depth of 19m.
As shown in fig. 14 and 15, in the step 4, the diameter of the steel pipe pile is reduced to 400mm, and the steel pipe pile is continuously drilled into the granite rock layer from 4m deeply into the granite rock layer for apoplexy, the drilling depth is 27m, and the design depth requirement is met.
As shown in fig. 16 and 17, in step 5, the gap between the steel pipe piles of step 2 and step 4 is filled with C25 concrete to a filling depth of 23m, and the steel pipe pile construction is completed.
Referring to fig. 1-5, the present utility model provides a technical solution: screw grooves 6 are symmetrically formed in the outer surfaces of the steel pipe pile II 2 and the steel pipe pile III 3, protruding blocks 7 matched with the screw grooves 6 are symmetrically connected to the inner walls of the steel pipe pile I1 and the steel pipe pile II 2, and the protruding blocks 7 are made of metal materials.
During operation, through screw thread groove 6 and lug 7, in inserting steel-pipe pile two 2 into steel-pipe pile one 1 or insert steel-pipe pile three 3 inside steel-pipe pile two 2, lug 7 slides in screw thread groove 6 to make steel-pipe pile two 2 and steel-pipe pile three 3's insertion process more steady, and be difficult for the slope at the insertion process, thereby make steel-pipe pile two 2 and steel-pipe pile three 3 insert the stratum and make difficult slope, more stable.
Referring to fig. 1-5, the present utility model provides a technical solution: the outer surfaces of the steel pipe pile II 2 and the steel pipe pile III 3 are symmetrically provided with insertion grooves 8, and the upper ends of the insertion grooves 8 are communicated with the thread grooves 6.
During operation, when inserting steel-pipe pile two 2 into steel-pipe pile one 1 inside, lug 7 can advance to get into insert groove 8 to fix a position steel-pipe pile two 2, in the lug 7 of being convenient for gets into screw thread groove 6 through insert groove 8.
Referring to fig. 1-5, the present utility model provides a technical solution: the lower ends of the first steel pipe pile 1, the second steel pipe pile 2 and the third steel pipe pile 3 are respectively connected with a drill bit 9, and the drill bits 9 are made of metal materials.
During operation, the efficiency of drilling the first steel pipe pile 1, the second steel pipe pile 2 and the third steel pipe pile 3 into the ground can be improved through the drill bit 9.
Referring to fig. 1-5, the present utility model provides a technical solution: the outer surfaces of the plurality of steel pipe piles I1 are connected with the same inner supporting plate I10, the inner wall of the inner supporting plate I10 is sequentially connected with four inner supporting columns I11, and the inner supporting columns I11 are made of metal materials.
During operation, the stability of the first steel pipe pile 1, the second steel pipe pile 2 and the third steel pipe pile 3 can be effectively improved through the first inner support column 11 and the first inner support plate 10.
Referring to fig. 1-5, the present utility model provides a technical solution: the outer surfaces of the plurality of first steel pipe piles 1 are connected with the same inner support plate II 12, the inner wall of the inner support plate II 12 is sequentially connected with four inner support columns II 13, and the inner support columns II 13 are made of metal materials.
During operation, the stability of the steel pipe pile I1, the steel pipe pile II 2 and the steel pipe pile III 3 after installation is completed can be further improved through the inner support column II 13 and the inner support plate II 12.
In conclusion, the first steel pipe pile 1 is drilled into the junction of the strong weathered granite layer and the weathered granite layer, the drilling depth is 19m, then the insertion groove 8 on the second steel pipe pile 2 is aligned with the projection 7, the second steel pipe pile 2 is inserted into the first steel pipe pile 1 until the second steel pipe pile 2 is drilled into the weathered granite layer 4m from the junction of the strong weathered granite layer and the weathered granite layer, then C25 concrete is poured into a gap between the second steel pipe pile 2 and the first steel pipe pile 1 for filling, the filling depth is 19m, a concrete layer one 4 is formed, then the insertion groove 8 on the third steel pipe pile 3 is aligned with the projection 7, the third steel pipe pile 3 is inserted into the second steel pipe pile 2, the third steel pipe pile 3 is continuously drilled into the weathered granite layer 8m from the deep middle weathered granite layer 4m, the drilling depth is 27m, then the gap between the third steel pipe pile 3 and the second steel pipe pile 2 is filled with C25 concrete, the filling depth is 23m, the second concrete layer 5 is formed, and the pile construction is completed.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. A be used for river course hard rock stratum bridge aquatic foundation ditch steel cofferdam device, includes a plurality of steel-pipe piles (1), its characterized in that: the inner wall of the steel pipe pile I (1) is connected with a steel pipe pile II (2) and a steel pipe pile III (3), a concrete layer I (4) is poured between the steel pipe pile I (1) and the steel pipe pile II (2), and a concrete layer II (5) is poured between the steel pipe pile II (2) and the steel pipe pile III (3).
2. The steel cofferdam device for a river hard rock stratum bridge underwater foundation pit of the present utility model as set forth in claim 1, wherein: screw grooves (6) are symmetrically formed in the outer surfaces of the second steel pipe pile (2) and the third steel pipe pile (3), and protruding blocks (7) matched with the screw grooves (6) are symmetrically connected to the inner walls of the first steel pipe pile (1) and the second steel pipe pile (2).
3. The steel cofferdam device for the underwater foundation pit of the hard rock stratum bridge of the river course according to claim 2, wherein: the outer surfaces of the second steel pipe pile (2) and the third steel pipe pile (3) are symmetrically provided with insertion grooves (8), and the upper ends of the insertion grooves (8) are communicated with the thread grooves (6).
4. A steel cofferdam assembly for a river hard rock formation bridge in water, as claimed in claim 3, wherein: the lower ends of the first steel pipe pile (1), the second steel pipe pile (2) and the third steel pipe pile (3) are connected with drill bits (9).
5. The steel cofferdam device for the underwater foundation pit of the hard rock stratum bridge of the river course is characterized in that: the outer surfaces of the steel pipe piles I (1) are connected with the same inner supporting plate I (10), and the inner walls of the inner supporting plate I (10) are sequentially connected with four inner supporting columns I (11).
6. The steel cofferdam device for the underwater foundation pit of the hard rock stratum bridge of the river course is characterized in that: the outer surfaces of the steel pipe piles I (1) are connected with the same inner support plate II (12), and the inner walls of the inner support plate II (12) are sequentially connected with four inner support column II (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321811543.2U CN220266605U (en) | 2023-07-11 | 2023-07-11 | Be used for river course hard rock stratum bridge aquatic foundation ditch steel cofferdam device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321811543.2U CN220266605U (en) | 2023-07-11 | 2023-07-11 | Be used for river course hard rock stratum bridge aquatic foundation ditch steel cofferdam device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220266605U true CN220266605U (en) | 2023-12-29 |
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ID=89317894
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321811543.2U Active CN220266605U (en) | 2023-07-11 | 2023-07-11 | Be used for river course hard rock stratum bridge aquatic foundation ditch steel cofferdam device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220266605U (en) |
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2023
- 2023-07-11 CN CN202321811543.2U patent/CN220266605U/en active Active
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