CN117364824A - Large-diameter tubular pile and column sleeve caisson composite deepwater foundation and construction method thereof - Google Patents
Large-diameter tubular pile and column sleeve caisson composite deepwater foundation and construction method thereof Download PDFInfo
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- CN117364824A CN117364824A CN202311294878.6A CN202311294878A CN117364824A CN 117364824 A CN117364824 A CN 117364824A CN 202311294878 A CN202311294878 A CN 202311294878A CN 117364824 A CN117364824 A CN 117364824A
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- caisson
- foundation
- tubular pile
- diameter tubular
- pile
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- 239000002131 composite material Substances 0.000 title claims abstract description 24
- 238000010276 construction Methods 0.000 title claims description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 35
- 230000000149 penetrating effect Effects 0.000 claims abstract description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 33
- 239000010959 steel Substances 0.000 claims description 33
- 238000013461 design Methods 0.000 claims description 11
- 239000011150 reinforced concrete Substances 0.000 claims description 3
- 150000001875 compounds Chemical class 0.000 claims 1
- 239000010410 layer Substances 0.000 description 31
- 238000005516 engineering process Methods 0.000 description 8
- 239000002689 soil Substances 0.000 description 7
- 238000005192 partition Methods 0.000 description 4
- 239000004567 concrete Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/10—Deep foundations
- E02D27/20—Caisson foundations combined with pile foundations
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/52—Submerged foundations, i.e. submerged in open water
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Revetment (AREA)
Abstract
The invention discloses a large-diameter tubular pile and column sleeve caisson composite deepwater foundation, and relates to the technical field of deep water foundations. Comprises a caisson, which comprises a bottom plate, a top plate and an outer wall plate; at least one hole vertically penetrating the bottom plate and the top plate; and the large-diameter tubular pile is arranged inside the hole. According to the invention, the holes on the caisson are sleeved on the top of the large-diameter tubular pile and are downwards placed along the outer wall of the large-diameter tubular pile, and as the holes of the caisson are sleeved on the large-diameter tubular pile, the caisson cannot horizontally displace due to water flow force and wave force, so that the difficulty in positioning, rectifying and controlling the caisson in the sea is reduced, and the accuracy of downwards placing the caisson foundation is improved; and the large-diameter pipe pile and the caisson are integrally stressed together, so that the advantages of the large-diameter pipe pile and the caisson can be fully exerted.
Description
Technical Field
The invention relates to the field of deep water foundations, in particular to a large-diameter tubular pile and column sleeve caisson composite deep water foundation and a construction method thereof.
Background
At present, the deep water bridge in China gradually goes from inland, offshore, small span to open sea, deep water and large span. All the requirements are that a bridge deep water foundation is built, and the maximum depth can reach 120m. The ultra-deep water weak foundation construction condition of the bridge with the strait and the large span is generally poor, and typical severe environments such as ocean water depth, high tidal current speed, large wind wave, thick submarine coverage layer, weak foundation and the like exist, so that the design and construction of the deep water foundation of the bridge are a great difficulty of the bridge with the strait and the large span. The current large ocean deep water foundation mainly comprises a large-diameter pile group foundation and a sunk well foundation, and the following problems are faced when the foundation is applied to deep sea areas with thick covering layers and low foundation bearing capacity:
1. the large-diameter pile group foundation has huge size and obvious pile group effect; the single pile has large load, the design of the friction pile can only be realized for the soft foundation on the sea bottom, the pile length in the soil is long, the pile length can exceed 200m, and the existing pile driving equipment is difficult to realize for the ultra-long pile. In the aspect of construction, the deepwater construction platform and the overseas are difficult to prevent waves, and the offshore operation procedures are complicated and the operation time is long.
2. The open caisson foundation is large in structural size under the condition of the deepwater soft foundation, a large amount of open caisson is difficult to manufacture and transport, water flow force is large, local scouring is large, as the soil layer below the deepwater soft foundation is mainly clay soil, consolidation time is long, sedimentation cannot be completed quickly, and a certain sedimentation amount is also generated after engineering is completed. In the aspect of construction, for areas with high wind and high waves, the water blocking force is high, and the open caisson is difficult to accurately position, drop and correct and control; after the open caisson is put in place, the anti-scour (bottom protection) layer around the open caisson is difficult to construct and the construction workload is large.
Disclosure of Invention
Aiming at the defects in the prior art, the invention solves the technical problems as follows: how to improve the accuracy of the foundation lowering of the open caisson.
In order to achieve the above purpose, the large-diameter tubular pile and column sleeve caisson composite deepwater foundation provided by the invention comprises:
a caisson comprising a bottom plate, a top plate and an outer wall plate;
at least one hole vertically penetrating the bottom plate and the top plate;
and the large-diameter tubular pile is arranged inside the hole.
On the basis of the technology, the bottom of the caisson is provided with a foundation.
On the basis of the technology, the foundation comprises a plurality of steel pipe piles and a cushion layer, wherein the steel pipe piles are arranged at the bottom of the cushion layer, and the cushion layer is used for being paved between the caisson and the water bottom surface.
On the basis of the technology, tie beams are arranged between the tops of the two adjacent large-diameter tubular piles.
On the basis of the technology, the inside of the caisson is of a hollow structure.
On the basis of the technology, a plurality of baffle plates are arranged in the caisson, and the positions of the baffle plates are not coincident with the positions of the holes.
On the basis of the technology, the large-diameter tubular pile column comprises an inner steel pipe, an outer steel pipe and a filling layer, wherein the filling layer is arranged between the inner steel pipe and the outer steel pipe.
On the basis of the technology, the filling layer is a reinforced concrete layer.
The invention provides a construction method of a large-diameter tubular pile and column sleeve caisson composite deepwater foundation, which is characterized by comprising the following steps:
providing a large diameter tubular pile column jacket caisson composite deepwater foundation according to any one of claims;
inserting the large-diameter pipe pile into a design position of the water bottom according to construction requirements;
hanging the caisson to the water surface of the designed position, wherein the holes of the caisson are aligned with the large-diameter tubular piles;
the caisson is weighted and submerged until the caisson reaches the water bottom.
On the basis of the technology, before the large-diameter pipe pile is inserted into the design position of the water bottom surface according to construction requirements, the method further comprises the following steps:
and (3) inserting a plurality of steel pipe piles into the water bottom surface, and paving a cushion layer on the tops of the steel pipe piles to form a foundation.
Compared with the prior art, the invention has the advantages that:
according to the invention, at least one large-diameter tubular pile column is inserted into the water bottom according to construction requirements, and at least one hole is formed in the bottom and the top of the caisson in a penetrating manner through the design position of the caisson and the design of the large-diameter tubular pile column. Compared with the existing sinking well foundation, the sinking box is sleeved with the holes in the sinking box into the top of the large-diameter pipe pile and is lowered along the outer wall of the large-diameter pipe pile, and the holes of the sinking box are sleeved on the large-diameter pipe pile, so that the sinking box cannot displace in the horizontal direction due to water flow force and wave force, the positioning, deviation rectifying and control difficulty of the sinking box in the sea is reduced, and the sinking well foundation lowering accuracy is improved.
Drawings
FIG. 1 is a schematic structural view of a large diameter pile-column jacket caisson composite deepwater foundation according to an embodiment of the present invention;
FIG. 2 is a top view of FIG. 1;
fig. 3 is a cross-sectional view of fig. 1.
In the figure: 1-foundation, 11-steel pipe piles, 12-cushion layers, 2-large-diameter pipe piles, 21-inner steel pipes, 22-outer steel pipes, 23-filling layers, 3-caissons, 31-top plates, 32-bottom plates, 33-outer wall plates, 34-partition plates, 35-holes, 4-connecting assemblies and 5-tie beams.
Detailed Description
Embodiments of the present invention are described in further detail below with reference to the accompanying drawings.
Referring to fig. 1, the large-diameter tubular pile and column sleeve caisson composite deepwater foundation in the embodiment of the invention comprises a caisson 3, wherein the caisson 3 comprises a bottom plate 32, a top plate 31 and an outer wall plate 33, the top surface and the ground of the caisson 3 are respectively the top plate 31 and the bottom plate 32, the side surface of the caisson 3 is the outer wall plate 33, and the inside of the caisson 3 can be solid or hollow; at least one hole 35 is vertically formed in the bottom plate 32 and the top plate 31 in a penetrating mode, the number of the holes 35 is designed according to the number of the large-diameter pipe piles 2 in a construction site, and the large-diameter pipe piles 2 are located inside the holes 35.
It can be seen that the invention inserts at least one large diameter tubular pile 2 into the water bottom according to the construction requirement, and then at least one hole 35 is formed through the bottom and top of the caisson 3 by the design position of the caisson 3 and the design of the large diameter tubular pile 2.
Compared with the existing sinking well foundation, one of the advantages is that: the caisson 3 is sleeved with the holes 35 on the caisson 3 at the top of the large-diameter tubular pile 2 and is lowered along the outer wall of the large-diameter tubular pile 2, and the caisson 3 cannot displace horizontally due to water flow force and wave force because the holes 35 of the caisson 3 are sleeved on the large-diameter tubular pile 2, so that the difficulty in positioning, rectifying and controlling the caisson 3 in the sea is reduced, and the accuracy of lowering the foundation of the caisson is improved;
another advantage is that: the large-diameter pipe pile 2 and the caisson 3 are integrally stressed together, so that the advantages of the large-diameter pipe pile 2 and the caisson 3 can be fully exerted; compared with the independent large-diameter pipe pile 2, the caisson 3 greatly improves the rigidity of the composite foundation and reduces the stress of the large-diameter pipe pile 2, so that the soil penetration depth of the large-diameter pipe pile 2 can be reduced, and the construction difficulty of inserting the large-diameter pipe pile 2 in the deep water foundation is reduced; compared with the foundation of the independent caisson 3, the large-diameter tubular pile 2 improves the rigidity of the composite foundation, can reduce the stress of the caisson 3, reduces the size of the caisson 3, can provide larger horizontal force when the large-diameter tubular pile 2 goes deep into a soil layer, can reduce the difficulty of resisting the horizontal force by independently relying on the horizontal friction force of the foundation in the anti-slip design of the working condition of the caisson 3, and reduces the compression loading quantity of the caisson 3.
Preferably, referring to fig. 1, the bottom of the caisson 3 is provided with a foundation 1.
Further, a concrete structure is provided for the foundation 1, the foundation 1 comprises a plurality of steel pipe piles 11 and a cushion layer 12, the steel pipe piles 11 are arranged at the bottom of the cushion layer 12, the cushion layer 12 is used for being laid between the caisson 3 and the water bottom, and the cushion layer 12 can be composed of a sand layer, a pebble layer and a gravel layer.
Preferably, as shown in fig. 1, tie beams 5 are arranged between the tops of two adjacent large-diameter tubular piles 2; or the large-diameter tubular piles 2 are sequentially connected through a tie beam 5 to form a frame structure.
The tie beam 5 is arranged at the top of the large-diameter tubular pile 2 and is connected with a plurality of large-diameter tubular piles 2 to form a frame structure for bearing the load transmitted from the upper part; and because the construction quantity of the large-diameter pipe pile 2 is smaller than that of the prior art, the frame structure formed by the underwater large-diameter pipe pile 2 and the tie beam 5 above the caisson 3 can reduce the ocean current force and the wave force of the seawater in the deepwater foundation.
Preferably, the interior of the caisson 3 is hollow.
The design has the advantages that: caisson 3 need be hauled to the mound position through hoist mechanism, and location caisson middle hole 35 aims at major diameter tubular pile 2, and the next is put down, in order to avoid the construction degree of difficulty of above-mentioned construction, the self weight of caisson 3 can not be overweight.
Further, referring to fig. 2, a specific internal structure of the caisson 3 is provided, a plurality of partition boards 34 are arranged in the caisson 3, the partition boards 34 are distributed in a criss-cross manner, and the positions of the partition boards 34 are not coincident with the positions of the holes 35, so that the large-diameter tubular pile 2 can smoothly pass through the caisson 3.
Preferably, referring to fig. 3, the large diameter tubular pile 2 includes an inner steel pipe 21, an outer steel pipe 22, and a packing layer 23, and the packing layer 23 is disposed between the inner steel pipe 21 and the outer steel pipe 22.
Further, the filling layer 23 is a reinforced concrete layer.
Preferably, referring to fig. 2, the large diameter tubular pile 2 is connected to the hole 35 by a connection assembly 4, and the connection assembly 4 may be a bolt assembly or a clamping assembly.
The construction method of the large-diameter tubular pile and column sleeve caisson composite deepwater foundation in the embodiment of the invention specifically comprises the following steps:
s1, performing submarine excavation by a dredger, and removing surface layer mucky soil; the underwater piling ship performs the insertion and the driving of the steel pipe piles 11; filling a cushion layer 12 consisting of a sand layer, a pebble layer and a crushed stone layer into the steel pipe pile 11 after finishing, and tamping under water to form a composite foundation 1;
s2, the water piling ship sequentially performs inserting and piling of an inner steel pipe 21 and an outer steel pipe 22 of the large-diameter steel pipe pile 2; removing soil between the inner steel pipe 21 and the outer steel pipe 22, placing an annular reinforcement cage, and pouring middle concrete to form a large-diameter steel pipe pile 2;
s3, hauling the prefabricated caisson 3 to a pier position, and positioning a middle hole 35 of the caisson 3 to align with the large-diameter tubular pile 2;
s4, injecting and sinking the compartment in the caisson 3 until the bottom plate 32 of the caisson 3 is horizontally landed on the top surface of the cushion layer 12;
s5, constructing a gap connection structure of the caisson 3 and the large-diameter pipe pile 2 so that the caisson and the large-diameter pipe pile form an integral structure;
and S6, constructing a tie beam 5 at the top of the large-diameter pipe pile 2 to form the large-diameter pipe pile sleeve caisson deep water composite foundation.
The invention is not limited to the above-mentioned best mode, any person can obtain other various products under the teaching of the invention, but any change in shape or structure is within the scope of protection of the invention, and all the technical schemes are the same or similar to the invention.
Claims (10)
1. The utility model provides a compound deep water basis of major diameter tubular pile post cover caisson which characterized in that, it includes:
-a caisson (3) comprising a bottom plate (32), a top plate (31) and an outer wall plate (33);
at least one hole (35) vertically penetrating the bottom plate (32) and the top plate (31);
and the large-diameter tubular pile column (2) is arranged inside the hole (35).
2. The large diameter tube pile jacket caisson composite deepwater foundation of claim 1, further comprising: the bottom of the caisson (3) is provided with a foundation (1).
3. The large diameter tube pile column jacket caisson composite deepwater foundation of claim 2, further comprising: the foundation (1) comprises a plurality of steel pipe piles (11) and a cushion layer (12), wherein the steel pipe piles (11) are arranged at the bottom of the cushion layer (12), and the cushion layer (12) is used for being laid between the caisson (3) and the water bottom surface.
4. The large diameter tube pile jacket caisson composite deepwater foundation of claim 1, further comprising: tie beams (5) are arranged between the tops of the two adjacent large-diameter pipe piles (2).
5. The large diameter tube pile jacket caisson composite deepwater foundation of claim 1, further comprising: the inside of the caisson (3) is of a hollow structure.
6. The large diameter tube pile jacket caisson composite deepwater foundation of claim 5, further comprising: the inside of caisson (3) is provided with a plurality of baffle (34), and the position of baffle (34) and the position of hole (35) do not coincide.
7. The large diameter tube pile jacket caisson composite deepwater foundation of claim 1, further comprising: the large-diameter tubular pile (2) comprises an inner steel pipe (21), an outer steel pipe (22) and a filling layer (23), wherein the filling layer (23) is arranged between the inner steel pipe (21) and the outer steel pipe (22).
8. The large diameter tube pile jacket caisson composite deepwater foundation of claim 7, further comprising: the filling layer (23) is a reinforced concrete layer.
9. The construction method of the large-diameter tubular pile and column sleeve caisson composite deepwater foundation is characterized by comprising the following steps of:
providing a large-diameter tubular pile-column jacket caisson composite deepwater foundation according to any one of claims 1 to 8;
inserting the large-diameter tubular pile (2) into a design position of the water bottom according to construction requirements;
hanging the caisson (3) to the water surface of the designed position, wherein the holes (35) of the caisson are aligned with the large-diameter tubular pile (2);
the caisson (3) is weighted and sunk until the caisson (3) reaches the water bottom.
10. The construction method of the large-diameter tubular pile sleeve caisson composite deepwater foundation according to claim 9, which is characterized by comprising the following steps before the large-diameter tubular pile (2) is inserted into the designed position of the water bottom according to the construction requirement:
a plurality of steel pipe piles (11) are inserted into the water bottom surface, and a cushion layer (12) is paved on the tops of the steel pipe piles (11) to form a foundation (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311294878.6A CN117364824A (en) | 2023-10-07 | 2023-10-07 | Large-diameter tubular pile and column sleeve caisson composite deepwater foundation and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311294878.6A CN117364824A (en) | 2023-10-07 | 2023-10-07 | Large-diameter tubular pile and column sleeve caisson composite deepwater foundation and construction method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117364824A true CN117364824A (en) | 2024-01-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311294878.6A Pending CN117364824A (en) | 2023-10-07 | 2023-10-07 | Large-diameter tubular pile and column sleeve caisson composite deepwater foundation and construction method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117364824A (en) |
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2023
- 2023-10-07 CN CN202311294878.6A patent/CN117364824A/en active Pending
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