CN109371996A - A kind of cofferdam and its lifting decentralization construction method - Google Patents
A kind of cofferdam and its lifting decentralization construction method Download PDFInfo
- Publication number
- CN109371996A CN109371996A CN201811474612.9A CN201811474612A CN109371996A CN 109371996 A CN109371996 A CN 109371996A CN 201811474612 A CN201811474612 A CN 201811474612A CN 109371996 A CN109371996 A CN 109371996A
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- Prior art keywords
- cofferdam
- lifting
- side plate
- steel pile
- pile casting
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/02—Restraining of open water
- E02D19/04—Restraining of open water by coffer-dams, e.g. made of sheet piles
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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 belongs to science of bridge building fields, specifically disclose a kind of cofferdam, comprising: side plate, inner support；Side plate is connect with inner support；Side plate is double-walled construction, comprising: exterior panel, inside panel；Multiple first holes are offered on exterior panel, and multiple second holes are offered on inside panel, the second hole close mechanism is additionally provided on inside panel.A kind of cofferdam lifting decentralization construction method is also disclosed, cofferdam is transported to bridge site waters, by cofferdam integral lifting and is transferred to the distribution beam at the top of steel pile casting；Adjust cofferdam plan-position；Cofferdam is integrally transferred to designed elevation；Limiting and guiding device is installed between steel pile casting and cofferdam side plate, wave force suffered by cofferdam is passed to and has become main body pile foundation receiving, guarantees cofferdam structure and construction safety.The present invention can satisfy live cofferdam normal construction under complicated marine environment, can accurately transfer in place.Have the advantages that improve offshore construction work efficiency, reduces operation safety risk, saves whole process construction time, save the cost.
Description
Technical field
The present invention relates to technical field of bridge engineering.
Background technique
Enclose water-bound of the cofferdam as underwater support table, pile foundation construction later period are installed, and are cushion cap to draw water after back cover
Construction provides " dry environment ", and a kind of trend that Large Span Bridges have become bridge construction is built between great river, straits.But
When carrying out cofferdam lifting decentralization construction under complicated marine environment, due to climate variability, wind is big, wave is high, gushes reasons, the cofferdam such as anxious is removed
It bears huge wave force to be also subjected to, if using conventional pay-off method and arranging with outside the comparable flow force in conventional inland river
It applies, lifting, the decentralization in cofferdam will receive influence, cause greatly to transfer contraposition difficulty.
Summary of the invention
The purpose of the present invention is providing the construction method in a kind of cofferdam and a kind of lifting decentralization of cofferdam for above-mentioned problem,
It can be suitable for complicated marine environment.
In order to solve the above technical problems, the present invention provides a kind of cofferdam, comprising: side plate；Further include: inner support；
The side plate is connect with the inner support；
Side plate is double-walled construction, comprising: exterior panel, inside panel；Multiple first holes are offered on the exterior panel, it is described interior
Multiple second holes are offered on siding, the first hole forms access through exterior panel and inner wall sheet separation and the second hole, goes back on inside panel
It is provided with the second hole close mechanism.
Preferably, the inner support includes: upper, middle and lower-ranking inner support.
More preferred, the multiple first hole, which is uniformly distributed, to be set on the exterior panel.
The present invention also provides a kind of liftings in cofferdam to transfer construction method, includes the following steps:
Step a connects high steel pile casting；
Distribution beam is arranged at the top of the steel pile casting in step b；
The cofferdam is transported to bridge site waters by step c, by cofferdam integral lifting and is transferred to described at the top of steel pile casting points
With on beam；
Step d, it is accurate to adjust cofferdam plan-position；
Step e integrally transfers in cofferdam to designed elevation, when decentralization, by second on the inside panel of cofferdam side plate
Hole is arranged to opening state；
Step f installs limiting and guiding device between steel pile casting and cofferdam side plate.
Carrying out preferred construction procedure to the above method is that in the step c, cofferdam is transported to bridge site water by barge
Domain is lifted by crane from barge using crane barge, by cofferdam integral lifting and is transferred to the distribution beam at the top of the steel pile casting.
Further preferred step is, in the step d, vertical crossing system is arranged in distribution beam, by it is described in length and breadth
Shifting system accurately adjusts cofferdam plan-position.
It is that in the step e, setting lifting and lowering system, pass through institute in distribution beam in further preferred step
Lifting and lowering system is stated to transfer in cofferdam to designed elevation.
It is further preferably, the lifting and lowering system are Multipoint synchronous lifting and lowering system.
Further preferred step is again, before the step f, further includes: stiffening plate, institute are arranged on the side plate of cofferdam
The installation site for stating stiffening plate is particularly located at the installation site of the limiting and guiding device.
More preferred step is, in the step f, installed between the steel pile casting and the cofferdam side plate described in
Limiting and guiding device includes: upper, middle and lower-ranking limiting and guiding device, pad top between each limiting and guiding device and steel pile casting
Tightly, it and will be welded and fixed between upper layer limiting and guiding device and steel pile casting.
The beneficial effects of the present invention are:
1. cofferdam provided by the present invention is integrally manufactured using batch production, is provided with several on the exterior panel of side plate
First hole, first hole can effectively reduce the effect for the significant horizontal power that part wave force generates cofferdam, so as to suitable
For complicated marine environment.
2. being provided with several the second holes on the inside panel of cofferdam side plate, the shape that the second hole is stayed open when cofferdam is transferred
State guarantees cofferdam structure safety so that head difference is consistent inside and outside cofferdam.After the completion of the decentralization of cofferdam, machine is closed by the second hole
Structure blocks the second hole, then back cover, draws water, to provide " dry environment " for bearing platform construction.
3. the cofferdam structure with inner support is more reliable and more stable, using the inner support of multilayered structure, can further exist
Guarantee the stability of cofferdam structure under complicated marine environment.
4. by cofferdam integral lifting and being transferred to steel pile casting top in lifting decentralization construction method in cofferdam provided by the present invention
It is accurately adjusted in the distribution beam in portion and then to cofferdam plan-position, to reduce the difficulty of cofferdam contraposition.When using vertical
When crossing system is adjusted cofferdam plan-position, contraposition accuracy can be made to be guaranteed.And then by cofferdam integrally under
It puts to designed elevation, after the completion of decentralization, limiting and guiding device is installed between steel pile casting and cofferdam side plate, thus by suffered by cofferdam
Wave force, which passes to, has become main body pile foundation receiving, guarantees cofferdam structure and construction safety.
Cofferdam and cofferdam lifting decentralization construction method provided by the present invention can be suitable for complicated marine environment.Both can expire
Foot scene cofferdam normal construction under complicated marine environment, can also make entire cofferdam construction have smoothly it is steady, fast and safely, energy
Enough accurate decentralizations are in place.To reduce operation safety risk, save whole process construction time, saving construction cost.
Detailed description of the invention
Fig. 1 is in the embodiment of the present invention using the operation schematic diagram of crane barge integral lifting cofferdam decentralization.
Fig. 2 is normal cross-section structural schematic diagram when transferring cofferdam in the embodiment of the present invention using lifting and lowering system.
Fig. 3 is side the schematic diagram of the section structure when transferring cofferdam in the embodiment of the present invention using lifting and lowering system.
Fig. 4 is top view when transferring cofferdam in the embodiment of the present invention using lifting and lowering system.
Fig. 5 is the structural schematic diagram that limiting and guiding device is arranged in the embodiment of the present invention between cofferdam and steel pile casting.
Fig. 6 is the structure that upper, middle and lower-ranking limiting and guiding device is arranged in the embodiment of the present invention between cofferdam and steel pile casting
Schematic diagram.
Fig. 7 is the structural schematic diagram of cofferdam exterior panel in the embodiment of the present invention.
Wherein, 1- side plate, 2- inner support, 3- steel pile casting, 4- crane barge, 5- distribution beam, 6- lifting and lowering system, 7- limit
Guiding device, 8- stiffening plate, the first hole 9-, 10- mean sea level, 11- trestle, 12- are averaged sea bed face.
Specific embodiment
For the present invention is further explained to reach the technical means and efficacy that predetermined goal of the invention is taken, below in conjunction with attached
Figure and preferred embodiment, to the specific embodiment and work in cofferdam proposed according to the present invention and cofferdam lifting decentralization construction method
It is described in detail as principle.
Cofferdam is integrally manufactured using batch production in the present embodiment.Its structure specifically includes that side plate 1, inner support 2.Side plate 1 with
Inner support 2 connects, and side plate 1 is double-walled construction, comprising: exterior panel, inside panel.Multiple first holes 9, inner wall are offered on exterior panel
Multiple second holes are offered on plate, the first hole 9 forms access through exterior panel and inner wall sheet separation and the second hole, also sets on inside panel
It is equipped with the second hole close mechanism.
The purpose that the first hole 9 is arranged is: in complicated marine environment, cofferdam is subjected to huge wave force, passes through
First hole 9 is set, the effect for the significant horizontal power that part wave force generates cofferdam can be effectively reduced.
Be in the purpose that the second hole is arranged in inside panel: when later period cofferdam is transferred, the second hole needs to be kept open, water
It flows to reach behind the first hole 9 on exterior panel, the second hole on exterior panel and inner wall sheet separation, inside panel outside the side plate of cofferdam and enclose
In weir, keep head difference inside and outside cofferdam consistent, to guarantee cofferdam structure safety.
For the stability for reinforcing cofferdam structure, it is preferred that multilayer inner support is arranged in cofferdam side plate 1.In the present embodiment
Inner support 2 using as shown in Figures 1 to 3, comprising: upper, middle and lower-ranking inner support 2.
For side plate 1, it is preferred that use double-walled steel construction.
Setting for the first hole 9, it is preferred that be set to exterior panel as shown in fig. 7, multiple first holes 9 are uniformly distributed
On.For the structure in the first hole 9, using oval-shaped pore structures in the present embodiment.By the first hole 9 of oval pore structure
It is longitudinally disposed on the exterior panel of side plate 1.
Cofferdam lifting provided by the invention transfers construction method and includes:
S1. after the completion of drilled pile construction, cofferdam region drilling platform is removed.
S2. high 6 supports steel pile casting 3 is connect, partial reinforced structure is welded at the top of steel pile casting 3, in the decentralization process of cofferdam
Ensure to lift and the distribution beam 5 of lowering system rides upon on the reinforced structure of steel pile casting 3.
S4. cofferdam is transported after the completion of entirety manufactures in the manner described above in factory to bridge site, will be under the integral lifting of cofferdam
It puts to the top distribution beam 5 of steel pile casting 3.
In this step, it is preferred that as shown in Figure 1, cofferdam is transported to bridge site waters by barge, using crane barge 4 from barge
Lifting by cofferdam integral lifting and is transferred to the distribution beam 5 at 3 top of steel pile casting.
S5. cofferdam plan-position is accurately adjusted.
In this step, it is preferred that vertical crossing system is set in distribution beam 5, vertical crossing system be one kind can longitudinally, it is horizontal
To the device of the plan-position in accurate adjustment cofferdam, cofferdam plan-position is adjusted by vertical crossing system, it is easily operated,
And it can guarantee Adjustment precision.
S6. cofferdam is integrally transferred to designed elevation, when decentralization, the second hole on the inside panel of cofferdam side plate 1 is arranged
State to be opened, to keep head difference inside and outside cofferdam consistent.
In this step, it is preferred that as shown in Figures 2 to 4, setting lifting and lowering system 6 in distribution beam 5, by hanging
Dress and lowering system 6 transfer in cofferdam to designed elevation.Lifting and lowering system 6 are placed in 3 top of steel pile casting, for hanging cofferdam
It is hung on steel pile casting 3, and bears the weight in entire cofferdam during cofferdam is transferred to designed elevation.More preferred, it uses
Multipoint synchronous lifting and lowering system.In the present embodiment, 8 numerical control hydraulic jack Multipoint synchronous liftings and decentralization system are used
System 6, is aided with computer and is controlled, be back to computer by pressure sensor and displacement sensor and be adjusted, and realizes position
It moves and synchronizes, load evenly distributes.Ensure that cofferdam is smoothly steady accurately to transfer in place.
S7. after the decentralization in place of cofferdam, referring to Fig. 5, limiting and guiding device is installed between steel pile casting 3 and cofferdam side plate 1
7, wave force suffered by cofferdam is passed to and has become main body pile foundation receiving, guarantees cofferdam structure and construction safety.So far it completes whole
A cofferdam lifts decentralization process.
Preferably, before the implementation of this step, further includes: on cofferdam side plate 1, be particularly located at limiting and guiding device 7
Stiffening plate 8 is arranged in installed position, to enhance the stress of casing.Stiffening plate 8 can be set on the inside panel of side plate 1, can also
To be arranged between inside panel and exterior panel.More preferred, the limition orientation installed between steel pile casting 3 and cofferdam side plate 1
Device 7 includes: upper, middle and lower-ranking limiting and guiding device, as shown in Figure 6.Pad between each limiting and guiding device and steel pile casting
It holds out against, and will be welded and fixed between upper layer limiting and guiding device and steel pile casting.
It should be noted last that the above specific embodiment is only used to illustrate the technical scheme of the present invention and not to limit it,
Although being described the invention in detail referring to example, those skilled in the art should understand that, it can be to the present invention
Technical solution be modified or replaced equivalently, without departing from the spirit and scope of the technical solution of the present invention, should all cover
In the scope of the claims of the present invention.
Claims (10)
1. a kind of cofferdam, comprising: side plate；It is characterized by further comprising: inner support；
The side plate is connect with the inner support；
Side plate is double-walled construction, comprising: exterior panel, inside panel；Multiple first holes, the inside panel are offered on the exterior panel
On offer multiple second holes, the first hole forms access through exterior panel and inner wall sheet separation and the second hole, also sets up on inside panel
There is the second hole close mechanism.
2. cofferdam as described in claim 1, which is characterized in that the inner support includes: upper, middle and lower-ranking inner support.
3. cofferdam as claimed in claim 1 or 2, which is characterized in that the multiple first hole, which is uniformly distributed, to be set to outside described
On siding.
4. construction method is transferred in a kind of lifting in cofferdam, which is characterized in that include the following steps:
Step a connects high steel pile casting；
Distribution beam is arranged at the top of the steel pile casting in step b；
The cofferdam is transported to bridge site waters by step c, by cofferdam integral lifting and is transferred to the distribution beam at the top of steel pile casting
On；
Step d, it is accurate to adjust cofferdam plan-position；
Step e integrally transfers in cofferdam to designed elevation, and when decentralization, the second hole on the inside panel of cofferdam side plate is set
It is set to opening state；
Step f installs limiting and guiding device between steel pile casting and cofferdam side plate.
5. lifting decentralization construction method in cofferdam as claimed in claim 4, which is characterized in that, will by barge in the step c
Cofferdam is transported to bridge site waters, is lifted by crane using crane barge from barge, by cofferdam integral lifting and transfers to point at the top of the steel pile casting
With on beam.
6. lifting decentralization construction method in cofferdam as claimed in claim 4, which is characterized in that in the step d, in distribution beam
Vertical crossing system is set, cofferdam plan-position is accurately adjusted by the vertical crossing system.
7. lifting decentralization construction method in cofferdam as claimed in claim 4, which is characterized in that in the step e, in distribution beam
Setting lifting and lowering system are transferred in cofferdam to designed elevation by the lifting and lowering system.
8. cofferdam as claimed in claim 7 lifting decentralization construction method, which is characterized in that the lifting and lowering system are more
The synchronous lifting of point and lowering system.
9. lifting decentralization construction method in cofferdam as claimed in claim 4, which is characterized in that before the step f, further includes:
Stiffening plate is set on the side plate of cofferdam, and the installation site of the stiffening plate is particularly located at the installation position of the limiting and guiding device
It sets.
10. the cofferdam lifting decentralization construction method as described in any one of claim 4 to 9, which is characterized in that the step
In f, the limiting and guiding device installed between the steel pile casting and the cofferdam side plate includes: upper, middle and lower-ranking limit
Guiding device, pad is held out against between each limiting and guiding device and steel pile casting, and by upper layer limiting and guiding device and steel pile casting
Between be welded and fixed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811474612.9A CN109371996A (en) | 2018-12-04 | 2018-12-04 | A kind of cofferdam and its lifting decentralization construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811474612.9A CN109371996A (en) | 2018-12-04 | 2018-12-04 | A kind of cofferdam and its lifting decentralization construction method |
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| CN109371996A true CN109371996A (en) | 2019-02-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811474612.9A Pending CN109371996A (en) | 2018-12-04 | 2018-12-04 | A kind of cofferdam and its lifting decentralization construction method |
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Cited By (2)
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| CN110606430A (en) * | 2019-08-28 | 2019-12-24 | 中铁大桥局集团有限公司 | Cofferdam hanging system and method |
| CN110644363A (en) * | 2019-06-24 | 2020-01-03 | 高军 | Construction method of underwater main tower of cross-river cable-stayed bridge of high-speed railway |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110644363A (en) * | 2019-06-24 | 2020-01-03 | 高军 | Construction method of underwater main tower of cross-river cable-stayed bridge of high-speed railway |
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| CN110606430B (en) * | 2019-08-28 | 2020-12-01 | 中铁大桥局集团有限公司 | Cofferdam hanging system and method |
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