CN108532616A - A kind of bridge Double-Wall Steel Boxed Cofferdam jack synchronization sinking construction engineering method - Google Patents
A kind of bridge Double-Wall Steel Boxed Cofferdam jack synchronization sinking construction engineering method Download PDFInfo
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- CN108532616A CN108532616A CN201810422140.6A CN201810422140A CN108532616A CN 108532616 A CN108532616 A CN 108532616A CN 201810422140 A CN201810422140 A CN 201810422140A CN 108532616 A CN108532616 A CN 108532616A
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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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Abstract
The invention discloses a kind of bridge Double-Wall Steel Boxed Cofferdam jack to synchronize sinking construction engineering method, includes the following steps：A, preparation of construction connects steel cofferdam construction site water, electric line, arranges construction site, get out plant, personnel depaly, construction material, understand engineering geology and hydrological geological conditions according to geological exploration data detailed analysis, conscientiously work out Design of Construction Organization, formulates construction monitoring plan；B, steel cofferdam designs, according to the concrete structure of specific Environment Design Double-Wall Steel Boxed Cofferdam；C, steel cofferdam makes, and entire cofferdam is all using live piecemeal processing and fabricating.Advantageous effect is：Steel cofferdam, which vertically connects, uses prestressed structure, it can be operated riverbed above section cofferdam and riverbed or less more than the water surface and be partially separated work, riverbed above section the water surface or more is floated up to automatically using the buoyancy of water to remove, without diving operation, it is fast to remove turnaround speed, it is safe, economical, reliable.
Description
Technical field
The present invention relates to the technical field of construction of floating open caisson in steel cofferdam sinking in water and water, more particularly to a kind of bridge
Beam Double-Wall Steel Boxed Cofferdam jack synchronizes sinking construction engineering method.
Background technology
Highway in China and railroad bridge deepwater foundation construction use Double-Wall Steel Boxed Cofferdam conduct on a large scale in recent decades
Temporary water dash structure.Traditional construction method not only wastes steel, but also speed of application is slow, need construction personnel dive under water into
Row operation, it is dangerous higher.In order to improve speed of application and quality, construction input is reduced, working security is improved, it is desirable to provide
A kind of novel bridge Double-Wall Steel Boxed Cofferdam jack synchronization sinking construction engineering method.
Invention content
The purpose of the present invention is that solve the above-mentioned problems and provides a kind of bridge Double-Wall Steel Boxed Cofferdam jack synchronization
Sinking construction engineering method.
The present invention is achieved through the following technical solutions above-mentioned purpose：
A kind of bridge Double-Wall Steel Boxed Cofferdam jack synchronization sinking construction engineering method, includes the following steps：
A, preparation of construction connects steel cofferdam construction site water, electric line, arranges construction site, gets out plant, Ren Yuanpei
It sets, construction material, engineering geology and hydrological geological conditions is understood according to geological exploration data detailed analysis, conscientiously work out construction group
Design is knitted, construction monitoring plan is formulated；
B, steel cofferdam designs, according to the concrete structure of specific Environment Design Double-Wall Steel Boxed Cofferdam；
C, steel cofferdam makes, and entire cofferdam is all using live piecemeal processing and fabricating；
D, platform for lining is built, and by the surface of the modular transportation of steel cofferdam to pier cap, it is assembled to set up interim first section cofferdam
Platform；
E, first section steel cofferdam is assembled and transfers platform building, and the assembly in head sections cofferdam is carried out on interim first section cofferdam platform for lining
And build steel cofferdam decentralization platform；
F, it removes that platform for lining is described under jack simultaneously to put first section steel cofferdam, removes after interim first section cofferdam platform for lining in institute
It states and punching jack is installed on steel cofferdam decentralization platform, and carry out the fixation and decentralization of the first section steel cofferdam；
G, first section article rubber water stop installation installs the article rubber water stop on the first section steel cofferdam；
H, the second section steel cofferdam fining twisted steel installation, installation the second section fining twisted steel on the first section steel cofferdam；
I, steel cofferdam is assembled, connects height, saves steel cofferdam splicing by described second and is saved above steel cofferdam mounted on the head；
J, jack carries out prestressing force connection, and the second section steel cofferdam is fixed together with the steel cofferdam fixed frame；
K, assembled final section, the assembled final section steel cofferdam above the second section steel cofferdam；
L, steel cofferdam splicing is completed, is transferred, is in place, is started using the jack switch board control punching jack and is driven double-walled
Steel cofferdam entire lowering；
M, gravel between double-walled is perfused, pours bottom concrete, gravel and casting concrete are perfused inside the Double-Wall Steel Boxed Cofferdam
Carry out back cover operation
N, it draws water, construction bearing platform, extracts the ponding inside the Double-Wall Steel Boxed Cofferdam out, in the Double-Wall Steel Boxed Cofferdam interior construction cushion cap
O, steel cofferdam is removed, part steel cofferdam is removed after the completion of construction, facilitates next reuse.
Further, the preparation in the step a further includes the experiment of concrete raw material, is mixed after selected match ratio
Coagulate the production of soil.
Further, further include the inspection of working steel product quality in the step a.
Further, it is provided with pile foundation steel pile casting below the decentralization of steel cofferdam described in step f platform, by the punching
Jack is bolted on above the steel cofferdam decentralization platform, and high strength steel strand is installed in the punching jack,
Then steel cofferdam fixed frame is fixed below the high strength steel strand, the Double-Wall Steel Boxed Cofferdam is fixed on the steel cofferdam and is consolidated
Determine below frame, multiple guiders that can be withstood on the pile foundation steel pile casting outer wall be installed on the Double-Wall Steel Boxed Cofferdam inner wall,
The punching jack is connected with oil pump by oil pipe, and the oil pump is electrically connected with the jack switch board.
Further, the punching jack shares eight, and the specified lifting force of each punching jack is 200
Ton, every jack configure the high strength steel strand that 19 15.24 intensity of φ are 1860Mpa grades.
Further, multiple links are fixed with by screw when first section steel cofferdam assembly described in the step h, by institute
It states the second section fining twisted steel to be fixed on the first section steel cofferdam by gasket and high-strength bolt, the article rubber water stop is put down
Be layered on the first section steel cofferdam upper surface, will described second save steel cofferdam splicing it is described it is first save above steel cofferdam, described the
The middle part of two section fining twisted steels is fixed on the inner annular steel inside the second section steel cofferdam by the high-strength bolt
On plate, second section fining twisted steel upper end is connected with first segment fining twisted steel, the first segment finish rolling by connector
Screw-thread steel is fixed on by fixture below the steel cofferdam fixed frame.
Further, the article rubber water stop is installed two layers according to the position ring of presstressed reinforcing steel inside and outside steel cofferdam, institute
It states article rubber water stop to be close to RELEASE PARKINGBRAKE head section steel cofferdams face suitable for reading and place smooth, and coats preparing neutral structure silicone adhesive and glued
Knot.
Further, the inner annular steel plate is welded on inside the link, and the inner annular steel plate surrounding is set
It is equipped with 12 second section fining twisted steels.
Further, in the step m, water filling auxiliary cofferdam is more than riverbed first in the Double-Wall Steel Boxed Cofferdam double wall
Water in sink, then pour into a mould double wall concrete auxiliary cofferdam enter Riverbed, finally use airlift suction dredger in cofferdam
Start mud sleeve system is uniformly injected into cofferdam outer wall to symmetrical suction mud auxiliary sinking of cofferdam by the premium mud of configured in advance simultaneously
Surrounding forms one layer of mud interlayer in cofferdam and covering interlayer, to reduce the side coefficient of friction resistance auxiliary that cofferdam sinks in covering
Sinking of cofferdam is to design altitude.
Further, it in the step j, should be spelled again when punching jack prestressing force connection cannot reach requirement
Connect the second section steel cofferdam.
The beneficial effects of the present invention are：Work efficiency is all improved in entire cofferdam using live piecemeal processing and fabricating, and shortening is applied
The work period, and can turnaround cycle use, avoid caused by cutting disassembling wall body deformation, damage from leading to that waste cannot be recycled
Material；Steel cofferdam, which vertically connects, uses prestressed structure, can be operated more than the water surface riverbed above section cofferdam and riverbed with
Riverbed above section is floated up to the water surface or more using the buoyancy of water and removed by the mask work of lower part automatically, without latent
Water operation, dismounting turnaround speed is fast, safe, economical, reliable；Prestressing without bondn Joining Technology is due to presstressed reinforcing steel and steel cofferdam
It without medium bonding between component, leans on connector, fining twisted steel to bear and transmit prestressing force entirely, without grouting after tensioning, simplifies
Process, it is convenient to check, control is accurate；Operating method is simple, and construction equipment less investment greatly facilitates pushing away for prestressing technique
Wide application.
Description of the drawings
Fig. 1 is the construction technology process that a kind of bridge Double-Wall Steel Boxed Cofferdam jack of the present invention synchronizes sinking construction engineering method
Figure；
Fig. 2 is that the double-wall steel that a kind of bridge Double-Wall Steel Boxed Cofferdam jack of the present invention synchronizes sinking construction engineering method encloses plan structure
Schematic diagram；
Fig. 3 is the connecting frame structure schematic diagram that a kind of bridge Double-Wall Steel Boxed Cofferdam jack of the present invention synchronizes sinking construction engineering method
Fig. 4 is the second section steel cofferdam installation that a kind of bridge Double-Wall Steel Boxed Cofferdam jack of the present invention synchronizes sinking construction engineering method
Schematic diagram；
Fig. 5 is that a kind of fining twisted steel installation of bridge Double-Wall Steel Boxed Cofferdam jack synchronization sinking construction engineering method of the present invention is shown
It is intended to；
Fig. 6 is the steel cofferdam sinking signal that a kind of bridge Double-Wall Steel Boxed Cofferdam jack of the present invention synchronizes sinking construction engineering method
Figure.
The reference numerals are as follows：
1, high-strength bolt；2, gasket；3, article rubber water stop；4, the second section fining twisted steel；5, inner annular steel plate；6, it connects
Device；7, first segment fining twisted steel；8, fixture；9, oil pipe；10, the second section steel cofferdam；11, oil pump；12, jack switch board；
13, first section steel cofferdam；14, punching jack；15, high strength steel strand；16, steel cofferdam transfers platform；17, steel cofferdam fixed frame；
18, Double-Wall Steel Boxed Cofferdam；19, guider；20, pile foundation steel pile casting；21, link.
Specific implementation mode
The invention will be further described below in conjunction with the accompanying drawings：
As shown in figs 1 to 6, a kind of bridge Double-Wall Steel Boxed Cofferdam jack synchronizes sinking construction engineering method, includes the following steps：
A, preparation of construction connects steel cofferdam construction site water, electric line, arranges construction site, gets out plant, Ren Yuanpei
It sets, construction material, engineering geology and hydrological geological conditions is understood according to geological exploration data detailed analysis, conscientiously work out construction group
Design is knitted, construction monitoring plan is formulated；
B, steel cofferdam designs, according to the concrete structure of specific Environment Design Double-Wall Steel Boxed Cofferdam 18；
C, steel cofferdam makes, and entire cofferdam is all using live piecemeal processing and fabricating；
D, platform for lining is built, and by the surface of the modular transportation of steel cofferdam to pier cap, it is assembled to set up interim first section cofferdam
Platform；
E, first section steel cofferdam 13 is assembled and transfers platform building, and the spelling in head sections cofferdam is carried out on interim first section cofferdam platform for lining
It fills and builds steel cofferdam decentralization platform 16；
F, remove the platform for lining jack decentralization simultaneously first section steel cofferdam 13, remove after interim first section cofferdam platform for lining
Installation punching jack 14 on the steel cofferdam decentralization platform 16, and carry out the fixation and decentralization of the first section steel cofferdam 13；
G, first section article rubber water stop installation installs the article rubber water stop 3 on the first section steel cofferdam 13；
H, the second section 10 fining twisted steel of steel cofferdam installation, installation the second section fining twisted steel 4 on the first section steel cofferdam 13；
I, steel cofferdam is assembled, connects height, saves the splicing of steel cofferdam 10 by described second and saves 13 top of steel cofferdam mounted on the head；
J, jack carries out prestressing force connection, and the second section steel cofferdam 10 is fixed together with the steel cofferdam fixed frame 17；
K, assembled final section, the assembled final section steel cofferdam above the second section steel cofferdam 10；
L, steel cofferdam splicing is completed, is transferred, is in place, and controlling the startup of punching jack 14 using jack switch board 12 drives
18 entire lowering of Double-Wall Steel Boxed Cofferdam；
M, gravel between double-walled is perfused, pours bottom concrete, is perfused inside the Double-Wall Steel Boxed Cofferdam 18 and gravel and pours coagulation
Soil carries out back cover operation
N, it draws water, construction bearing platform, extracts the ponding inside the Double-Wall Steel Boxed Cofferdam 18 out, in 18 interior construction of the Double-Wall Steel Boxed Cofferdam
Cushion cap
O, steel cofferdam is removed, part steel cofferdam is removed after the completion of construction, facilitates next reuse.
In the present embodiment, the preparation in the step a further includes the experiment of concrete raw material, is carried out after selected match ratio
The production of concrete.
It further include the inspection of working steel product quality in the present embodiment, in the step a.
In the present embodiment, 16 lower section of the decentralization of steel cofferdam described in step f platform is provided with pile foundation steel pile casting 20, by institute
It states punching jack 14 and is bolted on 16 top of steel cofferdam decentralization platform, the installation in the punching jack 14
Then steel cofferdam fixed frame 17 is fixed on 15 lower section of the high strength steel strand, by the Double-Wall Steel Boxed Cofferdam by high strength steel strand 15
18 are fixed on the lower section of the steel cofferdam fixed frame 17, and being installed on 18 inner wall of the Double-Wall Steel Boxed Cofferdam multiple can withstand on the pile foundation
Guider 19 on 20 outer wall of steel pile casting, the punching jack 14 are connected with oil pump 11 by oil pipe 9, the oil pump 11 with
The jack switch board 12 is electrically connected.
In the present embodiment, the punching jack 14 shares eight, the specified lifting force of each punching jack 14
It it is 200 tons, every jack configures the high strength steel strand 15 that 19 15.24 intensity of φ are 1860Mpa grades.
In the present embodiment, multiple links are fixed with by screw when first 13 assembly of section steel cofferdam described in the step h
21, it saves fining twisted steel 4 by described second and is fixed on the first section steel cofferdam 13 by gasket 2 and high-strength bolt 1, by institute
It states article rubber water stop 3 to be laid on 13 upper surface of the first section steel cofferdam, saves the splicing of steel cofferdam 10 by described second and saved in the head
The middle part of 13 top of steel cofferdam, the second section fining twisted steel 4 is fixed on the second section steel by the high-strength bolt 1
On inner annular steel plate 5 inside cofferdam 10, the second section fining twisted steel, 4 upper end is connected with first segment by connector 6
Fining twisted steel 7, the first segment fining twisted steel 7 are fixed on 17 lower section of the steel cofferdam fixed frame by fixture 8.
In the present embodiment, the article rubber water stop 3 is installed two layers according to the position ring of presstressed reinforcing steel inside and outside steel cofferdam,
The article rubber water stop 3 is close to 13 face suitable for reading of RELEASE PARKINGBRAKE head sections steel cofferdam and places smooth, and coats preparing neutral structure silicone adhesive
It is bonded.
Since 3 compressive property of the article rubber water stop is very poor, when the second section dead weight of steel cofferdam 10 can be by institute with regard to completion
Article rubber water stop 3 is stated to be compressed tightly against on the first section steel cofferdam 13.
Prestressed stretch-draw is carried out to fining twisted steel again, reinforces the connection between two section steel cofferdams.
Tension of prestressed tendon control force：
Ncon=σcon·Ap=1030*3.14*16*16=827955.2KN
Convert 827955.2KN/10Kg/m3=82.80t
Because of 60t<82.80t, therefore 60t jack are met the requirements
Practical tension of prestressed tendon proof stress：σ reality=Ncon/Ap=60000*10/（3.14*16*16）
=746MPa
Tension of prestressed tendon theoretic elongation：Δl= Ncon·L1/ Ap·Es
=（82.80*10*10*3.5/(804.2*10*200*10)
=18mm
Presstressed reinforcing steel actual elongation value：The practical L1/ ApEs of Δ l1=N
In formula
Ncon-tension of prestressed tendon control force（827955.2KN）；
The practical control force of N reality-presstressed reinforcing steels；
σ con-fining twisted steel strength standard value（1080/MPa）；
Ap-presstressed reinforcing steel area of section（804.2mm²）；
Unbonded prestressing tendon length (3.5m) in L1-beam；
Es-presstressed reinforcing steel elasticity modulus（200Gpa）；
Δ l-tension of prestressed tendon theoretic elongation；
Δ l1-presstressed reinforcing steel actual elongation value；
In the present embodiment, the inner annular steel plate 5 is welded on inside the link 21,5 surrounding of inner annular steel plate
It is provided with 12 second section fining twisted steels 4.
In the present embodiment, in the step m, water filling auxiliary cofferdam is in riverbed first in 18 double wall of the Double-Wall Steel Boxed Cofferdam
Sink in above water, then pour into a mould double wall concrete auxiliary cofferdam and enter Riverbed, is finally being enclosed using airlift suction dredger
Mud auxiliary sinking of cofferdam is symmetrically inhaled in weir while starting mud sleeve system, and the premium mud of configured in advance is uniformly injected into cofferdam
Outer wall surrounding forms one layer of mud interlayer, to reduce the side coefficient of friction resistance that cofferdam sinks in covering in cofferdam and covering interlayer
Assist sinking of cofferdam to design altitude.
In the present embodiment, in the step j, it should be weighed when 14 prestressing force of punching jack connection cannot reach requirement
Newly splice the second section steel cofferdam 10.
The basic principles, main features and advantages of the invention have been shown and described above.The technical staff of the industry should
Understand, the present invention is not limited to the above embodiments, and the above embodiments and description only describe the originals of the present invention
Reason, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes and improvements
It all fall within the protetion scope of the claimed invention.
Claims (10)
1. a kind of bridge Double-Wall Steel Boxed Cofferdam jack synchronizes sinking construction engineering method, it is characterised in that：Include the following steps：
A, preparation of construction connects steel cofferdam construction site water, electric line, arranges construction site, gets out plant, Ren Yuanpei
It sets, construction material, engineering geology and hydrological geological conditions is understood according to geological exploration data detailed analysis, conscientiously work out construction group
Design is knitted, construction monitoring plan is formulated；
B, steel cofferdam designs, according to the concrete structure of specific Environment Design Double-Wall Steel Boxed Cofferdam；
C, steel cofferdam makes, and entire cofferdam is all using live piecemeal processing and fabricating；
D, platform for lining is built, and by the surface of the modular transportation of steel cofferdam to pier cap, it is assembled to set up interim first section cofferdam
Platform；
E, first section steel cofferdam is assembled and transfers platform building, and the assembly in head sections cofferdam is carried out on interim first section cofferdam platform for lining
And build steel cofferdam decentralization platform；
F, the platform for lining jack decentralization simultaneously first section steel cofferdam is removed, is removed after interim first section cofferdam platform for lining in institute
It states and punching jack is installed on steel cofferdam decentralization platform, and carry out the fixation and decentralization of the first section steel cofferdam；
G, first section article rubber water stop installation installs the article rubber water stop on the first section steel cofferdam；
H, the second section steel cofferdam fining twisted steel installation, installation the second section fining twisted steel on the first section steel cofferdam；
I, steel cofferdam is assembled, connects height, saves steel cofferdam splicing by described second and is saved above steel cofferdam mounted on the head；
J, jack carries out prestressing force connection, and the second section steel cofferdam is fixed together with the steel cofferdam fixed frame；
K, assembled final section, the assembled final section steel cofferdam above the second section steel cofferdam；
Steel cofferdam splicing is completed, is transferred, is in place, is started using the jack switch board control punching jack and is driven double-wall steel
Cofferdam entire lowering；
M, gravel between double-walled is perfused, pours bottom concrete, gravel and casting concrete are perfused inside the Double-Wall Steel Boxed Cofferdam
Carry out back cover operation
N, it draws water, construction bearing platform, extracts the ponding inside the Double-Wall Steel Boxed Cofferdam out, in the Double-Wall Steel Boxed Cofferdam interior construction cushion cap
O, steel cofferdam is removed, part steel cofferdam is removed after the completion of construction, facilitates next reuse.
2. a kind of bridge Double-Wall Steel Boxed Cofferdam jack according to claim 1 synchronizes sinking construction engineering method, it is characterised in that：
Preparation in the step a further includes the experiment of concrete raw material, selectes the production of progress concrete after match ratio.
3. a kind of bridge Double-Wall Steel Boxed Cofferdam jack according to claim 1 synchronizes sinking construction engineering method, it is characterised in that：
It further include the inspection of working steel product quality in the step a.
4. a kind of bridge Double-Wall Steel Boxed Cofferdam jack according to claim 1 synchronizes sinking construction engineering method, it is characterised in that：
It is provided with pile foundation steel pile casting below the decentralization platform of steel cofferdam described in the step f, the punching jack is consolidated by bolt
It is scheduled on above the steel cofferdam decentralization platform, high strength steel strand is installed in the punching jack, then fixes steel cofferdam
Frame is fixed below the high strength steel strand, and the Double-Wall Steel Boxed Cofferdam is fixed below the steel cofferdam fixed frame, described double
Multiple guiders that can be withstood on the pile foundation steel pile casting outer wall are installed, the punching jack is logical on wall steel cofferdam inner wall
It crosses oil pipe and is connected with oil pump, the oil pump is electrically connected with the jack switch board.
5. a kind of bridge Double-Wall Steel Boxed Cofferdam jack according to claim 4 synchronizes sinking construction engineering method, it is characterised in that：
The punching jack shares eight, and the specified lifting force of each punching jack is 200 tons, every jack configuration 19
The high strength steel strand that 15.24 intensity of root φ is 1860Mpa grades.
6. a kind of bridge Double-Wall Steel Boxed Cofferdam jack according to claim 1 synchronizes sinking construction engineering method, it is characterised in that：
Multiple links are fixed with by screw when first section steel cofferdam assembly described in the step h, finish rolling screw thread is saved by described second
Steel is fixed on by gasket and high-strength bolt on the first section steel cofferdam, and the article rubber water stop, which is laid in the first section steel, encloses
On the upper surface of weir, steel cofferdam splicing is saved above the first section steel cofferdam by described second, the second section fining twisted steel
Middle part is fixed on by the high-strength bolt on the inner annular steel plate inside the second section steel cofferdam, the second section essence
It rolls screw-thread steel upper end and first segment fining twisted steel is connected with by connector, the first segment fining twisted steel is fixed by fixture
Below the steel cofferdam fixed frame.
7. a kind of bridge Double-Wall Steel Boxed Cofferdam jack according to claim 6 synchronizes sinking construction engineering method, it is characterised in that：
The article rubber water stop is installed two layers according to the position ring of presstressed reinforcing steel inside and outside steel cofferdam, the article rubber water stop and RELEASE PARKINGBRAKE
Head sections steel cofferdam face suitable for reading is close to and places smooth, and coats preparing neutral structure silicone adhesive and is bonded.
8. a kind of bridge Double-Wall Steel Boxed Cofferdam jack according to claim 6 synchronizes sinking construction engineering method, it is characterised in that：
The inner annular steel plate is welded on inside the link, and the inner annular steel plate surrounding is provided with 12 second sections
Fining twisted steel.
9. a kind of bridge Double-Wall Steel Boxed Cofferdam jack according to claim 1 synchronizes sinking construction engineering method, it is characterised in that：
In the step m, sink in water of the water filling auxiliary cofferdam more than riverbed first in the Double-Wall Steel Boxed Cofferdam double wall, then pour into a mould
Double wall concrete auxiliary cofferdam enters Riverbed, is finally symmetrically inhaled in cofferdam under mud auxiliary cofferdam using airlift suction dredger
It sinks while starting mud sleeve system and the premium mud of configured in advance is uniformly injected into cofferdam outer wall surrounding, in cofferdam and coating
Between form one layer of mud interlayer, assist sinking of cofferdam to design altitude to reduce the side coefficient of friction resistance that cofferdam sinks in covering.
10. a kind of bridge Double-Wall Steel Boxed Cofferdam jack according to claim 1 synchronizes sinking construction engineering method, feature exists
In：In the step j, the second section steel should be spliced again when punching jack prestressing force connection cannot reach requirement
Cofferdam.
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| CN201810422140.6A CN108532616A (en) | 2018-05-04 | 2018-05-04 | A kind of bridge Double-Wall Steel Boxed Cofferdam jack synchronization sinking construction engineering method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110219312A (en) * | 2019-05-14 | 2019-09-10 | 中国建筑第四工程局有限公司 | A kind of Double-Wall Steel Boxed Cofferdam, which is quickly removed, is used in turn construction |
| CN110607797A (en) * | 2019-02-13 | 2019-12-24 | 中铁八局集团建筑工程有限公司 | Underwater construction method for water taking head |
| 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 |
| CN114687347A (en) * | 2022-03-22 | 2022-07-01 | 中铁建大桥工程局集团南方工程有限公司 | Automatic deviation correcting device for open caisson construction |
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| CN110607797A (en) * | 2019-02-13 | 2019-12-24 | 中铁八局集团建筑工程有限公司 | Underwater construction method for water taking head |
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| 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 |
| CN114687347A (en) * | 2022-03-22 | 2022-07-01 | 中铁建大桥工程局集团南方工程有限公司 | Automatic deviation correcting device for open caisson construction |
| CN114687347B (en) * | 2022-03-22 | 2024-03-22 | 中铁建大桥工程局集团南方工程有限公司 | Automatic deviation correcting device for open caisson construction |
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