CN209162871U - A kind of Analysis of Suspension Bridges ' Anchorage composite foundation suitable for deep water soft clay area - Google Patents
A kind of Analysis of Suspension Bridges ' Anchorage composite foundation suitable for deep water soft clay area Download PDFInfo
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- CN209162871U CN209162871U CN201821748238.2U CN201821748238U CN209162871U CN 209162871 U CN209162871 U CN 209162871U CN 201821748238 U CN201821748238 U CN 201821748238U CN 209162871 U CN209162871 U CN 209162871U
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Abstract
The utility model discloses a kind of Analysis of Suspension Bridges ' Anchorage composite foundations suitable for deep water soft clay area, including driven pile group, bed course, precast caisson, erosion control brush layer, prefabricated cover board and cushion cap, the driven pile group has more driven piles and rigid pile composite foundation is collectively formed in a border circular areas and with existing weak soil in these driven pile dense distributions；The bed course is arranged on the existing weak soil of the rigid pile composite foundation；The precast caisson includes integrally formed bottom stage, the first cabinet and the second cabinet, and first cabinet includes the first cylinder body and the second cylinder body, and second cabinet includes integrally formed truncated cone-shaped cylinder and the 3rd cylinder body；The erosion control brush layer is arranged around the outer wall of the 3rd cylinder body；The prefabricated cover board is accepted on the top of first cabinet, and the prefabricated cover board accepts the cushion cap.The precast caisson of the utility model uses circular cross-section, and water flow adaptability is good, and local scouring depth is small, and the flow force and wave force that structure is born are small.
Description
Technical field
The utility model belongs to bridge field, more particularly, to a kind of suspension bridge anchor suitable for deep water soft clay area
Heavy stone used as an anchor composite foundation.
Background technique
With the rapid development of the national economy, transport development demand surges, is building both at home and abroad and preparing to build big
Type bridge is more and more, and with the appearance of bridge spanning the sea, span of bridge is increasing.These length, big bridge mostly use suspension cable
Bridge, is built on the anxious big rivers of the depth of water, stream or the sea of bad environments, often encounter the depth of water compared with deep, coating soil property is poor,
Very big etc. problems are washed away, bridge construction is highly detrimental to, the difficulty that basis is built is also bigger.
Large diameter borehole pile foundation or well foundation existing at present is applied in the depth of water compared with deep, coating soil property is poor
In inland river, marine environment, it is primarily present following problems:
1) high-rise pile cap Bored Pile Foundation, scour depth is deep, drift is big, and lateral rigidity is low, for Longspan Bridge
Under the horizontal force actions such as flow force, wave force, anticollision power, generally require using extensive major diameter High-Rise Pile Cap Foundation, base
Plinth scale is big, long construction period, deficiency in economic performance.Construction needs putting up platform, steel pile casting inserting piling, steel cofferdam etc., interim to assist
Engineering is more, and working procedure is complicated.
2) whole caisson basis, good integrity, bearing capacity is big, but needs the works such as steel open caisson transportation by driving, accurate positioning, suck sediment subsidence
Sequence, working procedure is more, and the period is long, and construction risk is high, and in the poor situation of coating soil property, well sinking is easy to happen prominent
It is heavy.
Utility model content
Aiming at the above defects or improvement requirements of the prior art, the utility model provides one kind suitable for deep water weak soil
The Analysis of Suspension Bridges ' Anchorage composite foundation in area can be applied to the depth of water inland river poor compared with deep, coating soil property, in marine environment, not only
Anchor Foundations of Suspension Bridge structure stress, economy and exploitativeness can be met also superior to currently used base form.
To achieve the above object, it according to the one aspect of the utility model, provides a kind of suitable for deep water soft clay area
Analysis of Suspension Bridges ' Anchorage composite foundation, which is characterized in that including driven pile group, bed course, precast caisson, erosion control brush layer, prefabricated cover board
And cushion cap, wherein
The driven pile group has more driven piles and these driven pile dense distributions are in a border circular areas, to be used for
It pierces in soft clay area and the existing weak soil of soft clay area is reinforced, and it is compound with the existing weak soil rigid pile to be collectively formed
Base；In addition, the upper end of the every driven pile exposes to the existing weak soil；
The bed course is arranged on the existing weak soil of the rigid pile composite foundation, and the upper end of the every driven pile
It is pierced into the bed course；
The precast caisson includes integrally formed bottom stage, the first cabinet and the second cabinet, and the bottom stage is shelved on described
On bed course, first cabinet and the second cabinet are shelved on the bottom stage, first cabinet include the first cylinder body and
The center line of the second cylinder body, the first cylinder body and the second cylinder body is vertically arranged, and the first cylinder body is located at described the
In two cylinders, second cabinet includes integrally formed truncated cone-shaped cylinder and the 3rd cylinder body, and the truncated cone-shaped cylinder is in
Up-small and down-big shape, and the center line of the truncated cone-shaped cylinder and the 3rd cylinder body is vertically arranged, the truncated cone-shaped cylinder
Upper end be connected on the outer wall of the second cylinder body and lower end connects the upper end of the 3rd cylinder body, described the 3rd cylinder
The lower end of body is connected on the bottom stage；In addition, the first cylinder body, the second cylinder body, truncated cone-shaped cylinder and the 3rd cylinder
The center line of body is overlapped；
The erosion control brush layer is arranged around the outer wall of the 3rd cylinder body；
The prefabricated cover board is accepted on the top of first cabinet, and the prefabricated cover board accepts the cushion cap.
Preferably, the inner wall of the first cylinder body is provided with cross rib, each side of the cross rib with it is described
The inner wall of the first cylinder body abuts.
Preferably, there are gaps between the first cylinder body and the second cylinder body, and interior central symmetry in this gap
More ribs are disposed with, the two side ends of every rib are abutted with the first cylinder body and the second cylinder body respectively.
Preferably, the lower end of the first cylinder body and the second cylinder body is connected on the bottom stage.
Preferably, there are gaps between the second cylinder body and the 3rd cylinder body, and interior central symmetry in this gap
More ribs are disposed with, the two side ends of every rib are abutted with the second cylinder body and the 3rd cylinder body respectively.
Preferably, the bed course include anti-filter sand bed, pebble layer and metalling and they by sequence from bottom to up
Arrangement.
Preferably, the second cylinder top has wrapped around outer lug boss cap, to adapt to top bearing structure.
In general, it can obtain down the above technical solutions conceived by the present invention are compared with the prior art,
Column the utility model has the advantages that
1) cylinder on the precast caisson top of the utility model has arc-shaped type face, and water flow adaptability is good, and part rushes
Degradation degree is small, and the flow force and wave force that column structure is born are small, and precast caisson is center symmetrical structure, prefabricated heavy
It is easy to position during caisson sinking, is not in that precast caisson reverses incorrigible problem.
2) design of the second cabinet of precast caisson lower part can increase the vertical and horizontal bearing capacity on basis, reduce basis rule
Mould；
3) the second cylinder top setting outer lug boss cap reduces precast caisson diameter, drop to adapt to top bearing structure construction
Low basis scale；
4) it uses the setting driven pile in existing weak soil to reinforce existing weak soil, forms rigid pile composite foundation, increase
Add existing bearing capacity of foundation slab, improves basic scour resistance.
5) foundation bearing capacity can be improved in the bed course between precast caisson and driven pile, improves basic anti-seismic performance, and pre-
Erosion control brush layer is set around caisson processed, can further improve basic scour resistance.
6) bottom stage of this composite foundation, the first cabinet and the second cabinet due to be it is integrally formed, use whole caisson,
Overall stiffness is big, and lateral rigidity is big, and horizontal force resistant is strong, and horizontal displacement is small, is very suitable for what deep water soft clay area was built
Anchor Foundations of Suspension Bridge.
7) driven pile can use large-scale pile driving barge construction, and precast caisson can be in dock or land is integral prefabricated,
It is lauched at transportation by driving to bridge site, water filling positioning sinking to designed elevation, whole process construction efficiency is high, safety is good, process flow
Simply, operation is easy, and construction quality is easy to control, and construction risk is low.
8) compared with existing pile foundation, it is strong and not that this composite foundation rigidity is big, cubic amount of concrete saves, anti-ship hits ability
Need the interim construction auxiliary equipment such as large-scale jacket；Compared with whole large-scale well-sinking, when this composite foundation does not need be long
Between suck sediment subsidence, short construction period, construction risk is small, scour resistance is good.
Detailed description of the invention
Fig. 1 is the schematic diagram of the suspension bridge anchor ingot composite foundation of the utility model；
Fig. 2 is the schematic diagram of precast caisson in the utility model；
Fig. 3 is the sectional view in Fig. 2 along line A-A；
Fig. 4 is the sectional view in Fig. 2 along line B-B；
Fig. 5 is the sectional view in Fig. 1 along line C-C.
Specific embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only used to explain
The utility model is not used to limit the utility model.In addition, institute in the various embodiments of the present invention described below
The technical characteristic being related to can be combined with each other as long as they do not conflict with each other.
Referring to Fig.1~Fig. 5, a kind of Analysis of Suspension Bridges ' Anchorage composite foundation suitable for deep water soft clay area, including driven pile 4
Group, bed course 3, precast caisson 1, erosion control brush layer 2, prefabricated cover board 6 and cushion cap 5, wherein
4 groups of the driven pile with more driven piles 4 and these 4 dense distributions of driven pile are in a border circular areas, with
The existing weak soil of soft clay area is reinforced for piercing in soft clay area, and rigid pile is collectively formed with the existing weak soil and answers
Close ground；In addition, the upper end of the every driven pile 4 exposes to the existing weak soil；
The bed course 3 is arranged on the existing weak soil of the rigid pile composite foundation, and every driven pile 4 is upper
End is pierced into the bed course 3；The anti-seismic performance on basis can be improved in bed course 3, can optimize the anti-seismic performance on basis；
The precast caisson 1 includes integrally formed bottom stage 11, the first cabinet 12 and the second cabinet 13, and the bottom stage 11 is put
It sets on the bed course 3, first cabinet 12 and the second cabinet 13 are shelved on the bottom stage 11, first cabinet 12
Including the first cylinder body 121 and the second cylinder body 122, the center line of the first cylinder body 121 and the second cylinder body 122 is perpendicular
Straight setting, the first cylinder body 121 are located in the second cylinder body 122, and second cabinet 13 includes integrally formed rotary table
Shape cylinder 131 and the 3rd cylinder body 132, the truncated cone-shaped cylinder 131 are in up-small and down-big shape, and the truncated cone-shaped cylinder
131 and the center line of the 3rd cylinder body 132 be vertically arranged, the upper end of the truncated cone-shaped cylinder is connected to the second cylinder body
On 122 outer wall and lower end connects the upper end of the 3rd cylinder body 132, and the lower end of the 3rd cylinder body 132 is connected to institute
It states on bottom stage 11；In addition, the first cylinder body 121, the second cylinder body 122, truncated cone-shaped cylinder 131 and the 3rd cylinder body 132
Center line be overlapped；
First cabinet 12 of the precast caisson 1 of the utility model uses circular cross-section, and water flow adaptability is good, local scour
Depth is small, and the flow force and wave force that structure is born are small, and precast caisson 1 is center symmetrical structure, under precast caisson 1
It is easy to position during heavy, is not in that precast caisson 1 reverses incorrigible problem.
The lower part of the utility model use truncated cone-shaped cylinder 131 so that substructure locally increase, rather than on similarly hereinafter
Section, it is possible to reduce the concrete scale of entire top precast caisson 1, the weight for mitigating structure itself improve the rigidity of structure, reaches
To the effect for the vertical and horizontal bearing capacity for increasing basis, and basic scale, save the cost can be reduced.
The erosion control brush layer 2 is arranged around the outer wall of the 3rd cylinder body 132；
The prefabricated cover board 6 is accepted on the top of first cabinet 12, and the prefabricated cover board 6 accepts the cushion cap 5.
Further, the inner wall of the first cylinder body 121 is provided with cross rib 14, and each side of the cross rib 14 is equal
It is abutted with the inner wall of the first cylinder body 121.Cross rib 14 can increase the local stiffness and globality of structure.
Further, there are gaps between the first cylinder body 121 and the second cylinder body 122, and in this gap in
The heart has been arranged symmetrically more first ribs 15, the two side ends of every first rib 15 respectively with the first cylinder body 121 and
Two cylinders 122 abut.Local stiffness and globality that these first ribs 15 play the role of increasing structure are set.
Further, the lower end of the first cylinder body 121 and the second cylinder body 122 is connected on the bottom stage 11.
Further, there are gaps between the second cylinder body 122 and the 3rd cylinder body 132, and in this gap in
The heart has been arranged symmetrically more second ribs 16, the two side ends of every second rib 16 respectively with the second cylinder body 122 and
Three cylinders 132 abut.The second rib 16 between these gaps is provided to play the local stiffness and globality for increasing structure
Effect.
Further, the bed course 3 is including anti-filter sand bed, pebble layer and metalling and they are by sequence from bottom to up
Arrangement.Preferably, the overall thickness 3m of bed course 3 sequentially consists of 50cm thickness anti-filter sand bed, 2m thickness diameter 10cm~80cm's
Pebble layer, the metalling of 50cm thickness are laid with 1 diameter of precast caisson that range is additional 0.1-0.2 times around precast caisson 1.
The local scour resistance that structure can be improved is designed in this way.
Further, the second cylinder top has wrapped around outer lug boss cap 17, to adapt to top bearing structure.Top
Bearing structure is the anchorage of suspension bridge.
Following construction method can be used to construct:
(1) it is excavated using large dredger slope, leveling seabed foundation pit, utilizes pile driving barge inserting piling steel-pipe pile or prefabricated pipe
Column.
(2) bed course 3 of 3m thickness is laid on driven pile 4 using ship.
(3) precast caisson 1 can be in dock or land is integral prefabricated, is lauched at transportation by driving to bridge site, under water filling positioning
It is sink to designed elevation.
(4) it is jettisoninged 1 surrounding erosion control brush layer 2 of precast caisson using ship.
After the completion of above-mentioned composite foundation construction, can construct top bearing structure again.
The utility model can be applied to the depth of water inland river poor compared with deep, coating soil property, in marine environment, can not only meet
Anchor Foundations of Suspension Bridge structure stress, economy and exploitativeness are also superior to currently used base form, in bridge field
The deep water foundation form of another economical rationality is provided for Bridge Design person, and this composite foundation rigidity is big, water flow adaptability
The flow force and wave force that good, structure is born are small, reduce basic scale, reduce construction investment, in addition, construction efficiency is high, peace
Good perfection, process flow is simple, and operation is easy, and construction quality is easy to control, and construction risk is low.
As it will be easily appreciated by one skilled in the art that the above is only the preferred embodiment of the utility model only, not
To limit the utility model, any modification made within the spirit and principle of the present invention, equivalent replacement and change
Into etc., it should be included within the scope of protection of this utility model.
Claims (7)
1. a kind of Analysis of Suspension Bridges ' Anchorage composite foundation suitable for deep water soft clay area, which is characterized in that including driven pile group, pad
Layer, precast caisson, erosion control brush layer, prefabricated cover board and cushion cap, wherein
The driven pile group has more driven piles and these driven pile dense distributions are in a border circular areas, for piercing
The existing weak soil of soft clay area is reinforced in soft clay area, and rigid pile composite foundation is collectively formed with the existing weak soil；
In addition, the upper end of the every driven pile exposes to the existing weak soil；
The bed course is arranged on the existing weak soil of the rigid pile composite foundation, and the upper end of the every driven pile is pierced
Enter in the bed course；
The precast caisson includes integrally formed bottom stage, the first cabinet and the second cabinet, and the bottom stage is shelved on the bed course
On, first cabinet and the second cabinet are shelved on the bottom stage, and first cabinet includes the first cylinder body and second
The center line of cylinder, the first cylinder body and the second cylinder body is vertically arranged, and the first cylinder body is located at second circle
In cylinder, second cabinet includes integrally formed truncated cone-shaped cylinder and the 3rd cylinder body, and the truncated cone-shaped cylinder is presented small
Big shape down, and the center line of the truncated cone-shaped cylinder and the 3rd cylinder body is vertically arranged, the truncated cone-shaped cylinder it is upper
End is connected on the outer wall of the second cylinder body and lower end connects the upper end of the 3rd cylinder body, the 3rd cylinder body
Lower end is connected on the bottom stage；In addition, the first cylinder body, the second cylinder body, truncated cone-shaped cylinder and the 3rd cylinder body
Center line is overlapped；
The erosion control brush layer is arranged around the outer wall of the 3rd cylinder body；
The prefabricated cover board is accepted on the top of first cabinet, and the prefabricated cover board accepts the cushion cap.
2. a kind of Analysis of Suspension Bridges ' Anchorage composite foundation suitable for deep water soft clay area according to claim 1, feature exist
, the inner wall of the first cylinder body is provided with cross rib, each side of the cross rib with the first cylinder body
Inner wall abuts.
3. a kind of Analysis of Suspension Bridges ' Anchorage composite foundation suitable for deep water soft clay area according to claim 1, feature exist
In, there are gaps between the first cylinder body and the second cylinder body, and in this gap in be centrosymmetrically arranged more ribs
Item, the two side ends of every rib are abutted with the first cylinder body and the second cylinder body respectively.
4. a kind of Analysis of Suspension Bridges ' Anchorage composite foundation suitable for deep water soft clay area according to claim 1, feature exist
In the lower end of the first cylinder body and the second cylinder body is connected on the bottom stage.
5. a kind of Analysis of Suspension Bridges ' Anchorage composite foundation suitable for deep water soft clay area according to claim 1, feature exist
In, there are gaps between the second cylinder body and the 3rd cylinder body, and in this gap in be centrosymmetrically arranged more ribs
Item, the two side ends of every rib are abutted with the second cylinder body and the 3rd cylinder body respectively.
6. a kind of Analysis of Suspension Bridges ' Anchorage composite foundation suitable for deep water soft clay area according to claim 1, feature exist
In, the bed course include anti-filter sand bed, pebble layer and metalling and they arrange by sequence from bottom to up.
7. a kind of Analysis of Suspension Bridges ' Anchorage composite foundation suitable for deep water soft clay area according to claim 1, feature exist
In the second cylinder top has wrapped around outer lug boss cap, to adapt to top bearing structure.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109356187A (en) * | 2018-10-26 | 2019-02-19 | 中铁第四勘察设计院集团有限公司 | Analysis of Suspension Bridges ' Anchorage composite foundation and its construction method suitable for deep water soft clay area |
| CN110878547A (en) * | 2019-11-01 | 2020-03-13 | 天津大学 | Suction bucket and round caisson integral prefabricated offshore wharf |
-
2018
- 2018-10-26 CN CN201821748238.2U patent/CN209162871U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109356187A (en) * | 2018-10-26 | 2019-02-19 | 中铁第四勘察设计院集团有限公司 | Analysis of Suspension Bridges ' Anchorage composite foundation and its construction method suitable for deep water soft clay area |
| CN110878547A (en) * | 2019-11-01 | 2020-03-13 | 天津大学 | Suction bucket and round caisson integral prefabricated offshore wharf |
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