CN110485443A - 8-shaped Double-Wall Steel Boxed Cofferdam and construction manipulation process - Google Patents
8-shaped Double-Wall Steel Boxed Cofferdam and construction manipulation process Download PDFInfo
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- CN110485443A CN110485443A CN201910477376.4A CN201910477376A CN110485443A CN 110485443 A CN110485443 A CN 110485443A CN 201910477376 A CN201910477376 A CN 201910477376A CN 110485443 A CN110485443 A CN 110485443A
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- 238000010276 construction Methods 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 22
- 230000008569 process Effects 0.000 title claims abstract description 13
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 38
- 239000010959 steel Substances 0.000 claims abstract description 38
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 19
- 238000007689 inspection Methods 0.000 claims description 15
- 238000003466 welding Methods 0.000 claims description 14
- 238000009434 installation Methods 0.000 claims description 13
- 239000011248 coating agent Substances 0.000 claims description 10
- 238000000576 coating method Methods 0.000 claims description 10
- 239000002689 soil Substances 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 238000012545 processing Methods 0.000 claims description 5
- 238000013461 design Methods 0.000 claims description 4
- 238000002513 implantation Methods 0.000 claims description 4
- 238000005086 pumping Methods 0.000 claims description 4
- 230000001360 synchronised effect Effects 0.000 claims description 4
- 238000012360 testing method Methods 0.000 claims description 4
- 238000012544 monitoring process Methods 0.000 claims description 3
- 238000011017 operating method Methods 0.000 claims description 3
- 230000010412 perfusion Effects 0.000 claims description 3
- 231100000241 scar Toxicity 0.000 claims description 3
- 239000013049 sediment Substances 0.000 claims description 3
- 238000012876 topography Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 10
- 239000000463 material Substances 0.000 description 6
- 230000008901 benefit Effects 0.000 description 5
- 238000009412 basement excavation Methods 0.000 description 3
- 230000007812 deficiency Effects 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000002601 radiography Methods 0.000 description 3
- 239000000725 suspension Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 238000005266 casting Methods 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000009415 formwork Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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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 8-shaped Double-Wall Steel Boxed Cofferdam and construction manipulation process；The cofferdam is made of inside panel, exterior panel, shifting board, horizontal bracing, inner ring plate, outer ring plate, perpendicular rib, perpendicular case, blade foot, steel pipe inner supporting and bottom concrete；Inside panel, exterior panel and perpendicular box-shaped at 8-shaped Double-Wall Steel Boxed Cofferdam main body, perpendicular rib is respectively welded on the inside of inside panel and exterior panel, and, inside panel welds integral with inner ring plate, exterior panel welds integral with outer ring plate, it is welded with horizontal bracing between inner ring plate and outer ring plate, is separated between inside panel, exterior panel by multiple shifting boards；Blade foot is arranged in the bottom of inside panel and exterior panel, and the lumen loading of the two has double wall concrete, and seal plate is arranged in the bottom and bottom concrete contact position of inside panel.The present invention can be well solved a series of problems that common Double-Wall Steel Boxed Cofferdam is faced in the bigger bearing platform construction process kind of length and width, meet safety, economy, the purpose of cost efficiency.
Description
Technical field
The present invention relates to cofferdam construction fields, are specifically a kind of 8-shaped Double-Wall Steel Boxed Cofferdam and construction manipulation process.
Background technique
Steel cofferdam refers in hydraulic engineering construction, and to build permanent water conservancy projects, that builds provisional goes along with sb. to guard him steel knot
Structure.It is to prevent water and soil from building position into building that it, which is acted on, so that in cofferdam internal drainage, excavation pit builds building
Object.
Common steel cofferdam has steel sheet-pile cofferdam, lock steel pipe pile cofferdam, Double-wall sin-gle-image radiography, single wall steel boxed cofferdam
And steel suspended box cofferdam.
1) base depth water blocking, earth-retaining in the middle-size and small-size cushion cap excavation of foundation pit of 6-8m steel sheet-pile cofferdam: are primarily adapted for use in
Go along with sb. to guard him facility.Currently, domestic common steel sheet pile is mainly six type of four type of Larsen and Larsen.Its major advantage is that construction is very fast
Victory, material utilization amount is few and the rate of recovery is high, and main deficiency is that rigidity is smaller, stake it is long be greater than 12m or more when inside support more, antiseepage
Ability is poor.
2) latches steel pipe pile cofferdam: being primarily adapted for use in depth water blocking, gear in the medium-and-large-sized cushion cap excavation of foundation pit of 8-18m
Soil goes along with sb. to guard him facility.Its major advantage is that the stiffness and strength of steel-pipe pile is bigger than steel sheet pile, and inside support is less, can be according to cofferdam reality
Border requirement selects steel-pipe pile diameter and wall thickness, more adaptable.It can be for the complicated geological of boulder bed or intectate
The synchronous steel pipe pile cofferdam pore-forming inserting piling that carries out is constructed to save the duration during filling pile construction, ratio of material dosage double-walled precast-boxed cofferdam
Or double-layer plate pile cofferdam is few, and the rate of recovery is high.Main deficiency requires machining for place and is made, processing and fabricating precision
It is more demanding.
3) Double-wall sin-gle-image radiography: Double-wall sin-gle-image radiography is suitable for deepwater foundation construction, is mainly used in the Changjiang river and master
Want the construction on river basis.For manufacture easy to process and meet structure stress requirement, cofferdam wall thickness is generally 1.2m-2.0m.It is main
Wanting advantage is that cofferdam overall stiffness and intensity are big, have the function of from floating, and first positioning sinking cofferdam inserting piling steel pile casting again can be used
Technique.The main insufficient stock utilization for not recyclable, the recyclable part of cushion cap or riverbed face material below is very low, weld seam
Flaw detection and waterproof test require height, and difficulty of construction is big for integral hoisting, therefore the cost is relatively high for double-wall cofferdam.
4) single wall steel boxed cofferdam: single wall steel boxed cofferdam apply in general to depth of foundation be 4-10m, cofferdam diameter compared with
The basis maintenance construction small, coating is relatively thin.Its processing and fabricating requires, sinking technique and material recuperability are same as double-walled steel bushing
Cofferdam.
5) steel suspended box cofferdam: steel lifted trunk is mainly used in high bearing platform supported on piles in deep water foundation construction, and bottom plate need to be arranged in cofferdam.It is main
It is divided into single wall suspension box-cofferdam and double-walled suspension box-cofferdam, wherein single wall suspension box-cofferdam is suitable for pumping level difference within 10m,
Otherwise it needs to design powerful inner supporting structure or using double-wall steel cofferdam.
Construction for deep water foundation, generallys use Double-Wall Steel Boxed Cofferdam.Common Double-Wall Steel Boxed Cofferdam has round, nose circle rectangle
And rectangle.Steel cofferdam configuration is adapted with cushion cap flat shape can reduce rolled steel dosage, reduce bottom concrete dosage, and reduction is held
Platform construction formwork installation procedure, correspondinglys increase work efficiency.
Circular configuration uniform force, component makes convenient for standardization, but bearing platform construction biggish for length-width ratio, using circle
The distance between shape cofferdam riverbank middle of the river side outer wall is long, and inclined slope implantation sinking on the bank is unstable under water, and bank lateral earth pressure is big,
It is easy to be limited by slope angle is stablized with neighbouring temporary structure layout, when offshore slope does not have the condition of large area leveling, make
With will be limited.Meanwhile most of space is extra, will cause the unnecessary waste of raw material, increases cost, reduces work efficiency, account for
It is larger with water surface area, cause ship current inconvenient, schematic diagram is as shown in Figure 1.
Nose circle rectangle Double-Wall Steel Boxed Cofferdam, bearing platform construction biggish for length-width ratio can be fitted mutually with cushion cap shape to greatest extent
It answers, but structure stress is uneven, arc section and straightway junction section turn moment are big, and more inner support, ring flat-plate spacing need to be arranged
Small and quantity is able to satisfy force request in many ways, ring block butt welding heavy workload, and installation speed is slow.Meanwhile inner support is more to press
Contracting construction space, nose circle rectangle Double-Wall Steel Boxed Cofferdam schematic diagram are as shown in Figure 2.
Its advantage and disadvantage of rectangle Double-Wall Steel Boxed Cofferdam bearing platform construction biggish for length-width ratio and nose circle rectangle Double-Wall Steel Boxed Cofferdam phase
Seemingly, rectangle Double-Wall Steel Boxed Cofferdam schematic diagram is as shown in Figure 3.
Based on the above feature, the present invention provides a kind of novel cofferdam structure form -8-shaped Double-Wall Steel Boxed Cofferdam energy herein
A series of problems that common Double-Wall Steel Boxed Cofferdam is faced in the bigger bearing platform construction process kind of length and width is well solved, peace is met
Entirely, economy, the purpose of cost efficiency.
Summary of the invention
Therefore, in order to solve above-mentioned deficiency, the present invention provides a kind of 8-shaped Double-Wall Steel Boxed Cofferdam and constructing operation work herein
Skill can be well solved a series of problems that common Double-Wall Steel Boxed Cofferdam is faced in the bigger bearing platform construction process kind of length and width, full
Sufficient safety, economy, the purpose of cost efficiency.
The invention is realized in this way constructing a kind of 8-shaped Double-Wall Steel Boxed Cofferdam, it is characterised in that: 8-shaped Double-Wall Steel Boxed Cofferdam
By inside panel, exterior panel, shifting board, horizontal bracing, inner ring plate, outer ring plate, perpendicular rib, perpendicular case, blade foot, steel pipe inner supporting and back cover
Coagulation local soil type at；Inside panel, exterior panel and perpendicular box-shaped at 8-shaped Double-Wall Steel Boxed Cofferdam main body, inside panel and exterior panel it is interior
Side is respectively welded perpendicular rib, also, inside panel welds integral, exterior panel and integral, the inner ring of outer ring plate welding with inner ring plate
It is welded with horizontal bracing between plate and outer ring plate, is separated between inside panel, exterior panel by multiple shifting boards；Inside panel and outer wall
Blade foot is arranged in the bottom of plate, and the lumen loading of the two has double wall concrete, and bottom and the bottom concrete contact position of inside panel are set
Set seal plate.
A kind of 8-shaped double-wall steel cofferdam construction operating procedure, it is characterised in that: realize as follows；
1), Double-Wall Steel Boxed Cofferdam fabricates；
A, Double-Wall Steel Boxed Cofferdam be not satisfying the requirements it is contemplated that scene processing preferably in factory process；
B carries out welding quality inspection by the weld seam grade divided in design document, and all weld seams are both needed to do waterproof test；
C, steel cofferdam production be divided into block part production-scene spelling, whole segment make-is lauched transportation by driving two ways, block part with it is whole
Segment can make at the scene also to be made in factory, selects suitable mode according to implementation condition；
D, horizontal bracing are important primary structure member, do not allow to dock under normal circumstances, strictly by code requirement pair when not can avoid
It connects, and quantity should not be excessive；
2), Double-Wall Steel Boxed Cofferdam in-site installation；
A, in-site installation select suitable method according to landform, the hydrology, transport, lifting condition；
B, when cofferdam is higher, the first two segment need to collect the whole circumferential welding deformation data in cofferdam, do number for the adjustment of subsequent segment
According to support；
C, section checks installation quality section by section, further includes deformation of member inspection (especially water in addition to welding quality checks
Flat diagonal brace), plate breakage inspection etc..Quality inspection table is formulated, is checked by inventory；
D, cofferdam water filling sinks uniformly should slowly sink, by frequency monitoring cofferdam deviation and posture.Underwater topography is drawn before implantation,
The coating depth of record incision in real time, and carry out the emergency preplan for encountering boulder, scar protrusion
E, folder cabin concreting preferably symmetrically pour, and control adjacent compartment inner concrete height difference；
F, the thicker cofferdam of weak soil coating, when cofferdam area is smaller, when suck sediment subsidence, can first inhale centre, and rear border of inhaling is formed
Pot bottom-shape；Sandy gravel coating, and when thickness is shallower is inhaled based on mud with border；When cofferdam, area is very big, and it is smaller to inhale mud depth
When, based on border suction mud；
G sinking of cofferdam draws cofferdam border underwater topographic map afterwards in place, and diver is lauched inspection, seals to notch and gap
It is stifled；
H, bottom concrete pour the arrangement for focusing on tissue concrete production, transport, pumping and perfusion system.Cofferdam area is smaller
When can Multipoint synchronous pour, when area is larger can subdivision pour or unilateral propulsion circulation conduit method pours.
The present invention has the advantage that the present invention provide 8-shaped Double-Wall Steel Boxed Cofferdam, by inside panel, exterior panel, shifting board,
Horizontal bracing, horizontal ring flat-plate, perpendicular rib, perpendicular case, blade foot, steel pipe inner supporting and bottom concrete composition.With following features；8 words
Shape Double-Wall Steel Boxed Cofferdam, it is advantageous to combine circle, the institute of nose circle rectangle, rectangle steel cofferdam, mainly there is following several features:
1) .8 font Double-Wall Steel Boxed Cofferdam uniform force is reasonable, and the soil pressure and water pressure outside cofferdam are converted into the circumferential direction in arc cofferdam
Pressure, for arcuate structure under the action of by radial equipartition load, optimal distance is arc, and structure is only by axis at this time
Power, shearing and moment of flexure are 0, and stress diagram is as shown in Figure 4.It is bigger that length and width are improved using 8-shaped Double-Wall Steel Boxed Cofferdam
Pile foundation in deep water and bearing platform construction needed for cofferdam mechanical property；
2) .8 font Double-Wall Steel Boxed Cofferdam configuration is adapted with cushion cap flat shape, and it is extra not will cause excessive space, is saved former
Material, 8-shaped Double-Wall Steel Boxed Cofferdam plan view are as shown in Figure 5；
3) is influenced smaller by underwater inclination bank slope.Compared to nose circle rectangle cofferdam, under size same case, the vertical spacing of ring flat-plate can
Increase, easy to process, site welding workload is small；Meanwhile steel pipe inner support quantity is greatly reduced, and is all in the perpendicular case position in middle part and is set
It sets, will not excessively compress construction space, cofferdam is easy for installation.
Detailed description of the invention
Fig. 1 is existing round Double-Wall Steel Boxed Cofferdam schematic diagram；
Fig. 2 is existing nose circle rectangle Double-Wall Steel Boxed Cofferdam schematic diagram；
Fig. 3 is existing rectangle Double-Wall Steel Boxed Cofferdam schematic diagram；
Fig. 4 is this patent 8-shaped Double-Wall Steel Boxed Cofferdam stress diagram；
Fig. 5 is this patent 8-shaped Double-Wall Steel Boxed Cofferdam floor plan；
Fig. 6-Fig. 7 is siding partial schematic diagram inside and outside this patent 8-shaped Double-Wall Steel Boxed Cofferdam；
Fig. 8-Fig. 9 is this patent 8-shaped Double-Wall Steel Boxed Cofferdam elevation.
Wherein: inside panel 1, exterior panel 2, shifting board 3, horizontal bracing 4, inner ring plate 5, outer ring plate 6 erect rib 7, erect case 8, sword
Foot 9, steel pipe inner supporting 10, seal plate 12, leading truck 13.
Specific embodiment
Below in conjunction with attached drawing, the present invention is described in detail, and technical solution in the embodiment of the present invention carries out clear
Chu is fully described by, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.
Based on the embodiments of the present invention, obtained by those of ordinary skill in the art without making creative efforts all
Other embodiments shall fall within the protection scope of the present invention.
The present invention by improve a kind of 8-shaped Double-Wall Steel Boxed Cofferdam is provided herein, as shown, 8-shaped Double-Wall Steel Boxed Cofferdam by
Inside panel 1, exterior panel 2, shifting board 3, horizontal bracing 4, inner ring plate 5, outer ring plate 6, perpendicular rib 7, perpendicular case 8, blade foot 9, the interior branch of steel pipe
Support 10 and bottom concrete composition；Inside panel 1, exterior panel 2 and perpendicular case 8 form the main body of 8-shaped Double-Wall Steel Boxed Cofferdam, inside panel
1 and the inside of exterior panel 2 be respectively welded perpendicular rib 7, also, inside panel 1 welds integral, exterior panel 2 and outer ring with inner ring plate 5
Plate 6 welds integral, and horizontal bracing 4 is welded between inner ring plate 5 and outer ring plate 6, between inside panel 1, exterior panel 2 by it is multiple every
Deck board 3 separates；Blade foot 9 is arranged in the bottom of inside panel 1 and exterior panel 2, and the lumen loading of the two has double wall concrete 11, inner wall
Seal plate 12 is arranged in the bottom and bottom concrete contact position of plate 1.
A kind of 8-shaped double-wall steel cofferdam construction operating procedure, is realized as follows；
1), Double-Wall Steel Boxed Cofferdam fabricates；
A, Double-Wall Steel Boxed Cofferdam be not satisfying the requirements it is contemplated that scene processing preferably in factory process；
B carries out welding quality inspection by the weld seam grade divided in design document, and all weld seams are both needed to do waterproof test；
C, steel cofferdam production be divided into block part production-scene spelling, whole segment make-is lauched transportation by driving two ways, block part with it is whole
Segment can make at the scene also to be made in factory, selects suitable mode according to implementation condition；
D, horizontal bracing are important primary structure member, do not allow to dock under normal circumstances, strictly by code requirement pair when not can avoid
It connects, and quantity should not be excessive；
2), Double-Wall Steel Boxed Cofferdam in-site installation；
A, in-site installation select suitable method according to landform, the hydrology, transport, lifting condition；
B, when cofferdam is higher, the first two segment need to collect the whole circumferential welding deformation data in cofferdam, do number for the adjustment of subsequent segment
According to support；
C, section checks installation quality section by section, further includes deformation of member inspection (especially water in addition to welding quality checks
Flat diagonal brace), plate breakage inspection etc..Quality inspection table is formulated, is checked by inventory；
D, cofferdam water filling sinks uniformly should slowly sink, by frequency monitoring cofferdam deviation and posture.Underwater topography is drawn before implantation,
The coating depth of record incision in real time, and carry out the emergency preplan for encountering boulder, scar protrusion
E, folder cabin concreting preferably symmetrically pour, and control adjacent compartment inner concrete height difference；
F, the thicker cofferdam of weak soil coating, when cofferdam area is smaller, when suck sediment subsidence, can first inhale centre, and rear border of inhaling is formed
Pot bottom-shape；Sandy gravel coating, and when thickness is shallower is inhaled based on mud with border；When cofferdam, area is very big, and it is smaller to inhale mud depth
When, based on border suction mud；
G, sinking of cofferdam draw cofferdam border underwater topographic map afterwards in place, and diver is lauched inspection, seals to notch and gap
It is stifled；
H, bottom concrete pour the arrangement for focusing on tissue concrete production, transport, pumping and perfusion system.Cofferdam area is smaller
When can Multipoint synchronous pour, when area is larger can subdivision pour or unilateral propulsion circulation conduit method pours.
8-shaped Double-Wall Steel Boxed Cofferdam of the present invention is by inside panel, exterior panel, shifting board, horizontal bracing, horizontal ring flat-plate, perpendicular rib, perpendicular
Case, blade foot, steel pipe inner supporting and bottom concrete composition.With following features；8-shaped Double-Wall Steel Boxed Cofferdam combines round, circle
End moment shape, the institute of rectangle steel cofferdam are advantageous, mainly there is following several features:
1) .8 font Double-Wall Steel Boxed Cofferdam uniform force is reasonable, and the soil pressure and water pressure outside cofferdam are converted into the circumferential direction in arc cofferdam
Pressure, for arcuate structure under the action of by radial equipartition load, optimal distance is arc, and structure is only by axis at this time
Power, shearing and moment of flexure are 0, and stress diagram is as shown in Figure 4.It is bigger that length and width are improved using 8-shaped Double-Wall Steel Boxed Cofferdam
Pile foundation in deep water and bearing platform construction needed for cofferdam mechanical property；
2) .8 font Double-Wall Steel Boxed Cofferdam configuration is adapted with cushion cap flat shape, and it is extra not will cause excessive space, is saved former
Material, 8-shaped Double-Wall Steel Boxed Cofferdam plan view are as shown in Figure 5；
3) is influenced smaller by underwater inclination bank slope.Compared to nose circle rectangle cofferdam, under size same case, the vertical spacing of ring flat-plate can
Increase, easy to process, site welding workload is small；Meanwhile steel pipe inner support quantity is greatly reduced, and is all in the perpendicular case position in middle part and is set
It sets, will not excessively compress construction space, cofferdam is easy for installation.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
Claims (2)
1. a kind of 8-shaped Double-Wall Steel Boxed Cofferdam, it is characterised in that: 8-shaped Double-Wall Steel Boxed Cofferdam by inside panel (1), exterior panel (2), every
Deck board (3), horizontal bracing (4), inner ring plate (5), outer ring plate (6), perpendicular rib (7), perpendicular case (8), blade foot (9), steel pipe inner supporting
(10) and bottom concrete forms；Inside panel (1), exterior panel (2) and perpendicular case (8) form the main body of 8-shaped Double-Wall Steel Boxed Cofferdam,
Be respectively welded perpendicular rib (7) on the inside of inside panel (1) and exterior panel (2), also, inside panel (1) be welded into inner ring plate (5) it is whole
Body, exterior panel (2) and outer ring plate (6) welding are integral, and horizontal bracing (4) are welded between inner ring plate (5) and outer ring plate (6),
It is separated between inside panel (1), exterior panel (2) by multiple shifting boards (3)；Sword is arranged in the bottom of inside panel (1) and exterior panel (2)
Foot (9), the lumen loading of the two have double wall concrete (11), and bottom and the setting of bottom concrete contact position of inside panel (1) stop
Water plate (12).
2. a kind of 8-shaped double-wall steel cofferdam construction operating procedure, it is characterised in that: realize as follows；
1), Double-Wall Steel Boxed Cofferdam fabricates；
A, Double-Wall Steel Boxed Cofferdam be not satisfying the requirements it is contemplated that scene processing preferably in factory process；
B carries out welding quality inspection by the weld seam grade divided in design document, and all weld seams are both needed to do waterproof test；
C, steel cofferdam production be divided into block part production-scene spelling, whole segment make-is lauched transportation by driving two ways, block part with it is whole
Segment can make at the scene also to be made in factory, selects suitable mode according to implementation condition；
D, horizontal bracing are important primary structure member, do not allow to dock under normal circumstances, strictly by code requirement pair when not can avoid
It connects, and quantity should not be excessive；
2), Double-Wall Steel Boxed Cofferdam in-site installation；
A, in-site installation select suitable method according to landform, the hydrology, transport, lifting condition；
B, when cofferdam is higher, the first two segment need to collect the whole circumferential welding deformation data in cofferdam, do number for the adjustment of subsequent segment
According to support；
C, section checks installation quality section by section, further includes deformation of member inspection (especially water in addition to welding quality checks
Flat diagonal brace), plate breakage inspection etc.；
Quality inspection table is formulated, is checked by inventory；
D, cofferdam water filling sinks uniformly should slowly sink, by frequency monitoring cofferdam deviation and posture；
Underwater topography is drawn before implantation, the coating depth of record incision in real time, and carry out that encounter boulder, the emergency of scar protrusion pre-
Case；
E, folder cabin concreting preferably symmetrically pour, and control adjacent compartment inner concrete height difference；
F, the thicker cofferdam of weak soil coating, when cofferdam area is smaller, when suck sediment subsidence, can first inhale centre, and rear border of inhaling is formed
Pot bottom-shape；Sandy gravel coating, and when thickness is shallower is inhaled based on mud with border；When cofferdam, area is very big, and it is smaller to inhale mud depth
When, based on border suction mud；
G sinking of cofferdam draws cofferdam border underwater topographic map afterwards in place, and diver is lauched inspection, seals to notch and gap
It is stifled；
H, bottom concrete pour the arrangement for focusing on tissue concrete production, transport, pumping and perfusion system；
Cofferdam area it is smaller when can Multipoint synchronous pour, when area is larger can subdivision pour or unilateral propulsion circulation conduit method is poured
It builds.
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| CN201910477376.4A CN110485443A (en) | 2019-06-03 | 2019-06-03 | 8-shaped Double-Wall Steel Boxed Cofferdam and construction manipulation process |
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| CN201910477376.4A CN110485443A (en) | 2019-06-03 | 2019-06-03 | 8-shaped Double-Wall Steel Boxed Cofferdam and construction manipulation process |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111042164A (en) * | 2019-12-31 | 2020-04-21 | 湖北省路桥集团有限公司 | Composite special-shaped cofferdam and construction method |
| CN113089697A (en) * | 2021-03-29 | 2021-07-09 | 中国十九冶集团有限公司 | Construction method for large steel cofferdam field assembly |
| CN113417302A (en) * | 2021-06-29 | 2021-09-21 | 中铁大桥局集团第五工程有限公司 | Construction method of deep-water double-wall steel pouring jacket cofferdam on embankment slope surface |
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| CN108547308A (en) * | 2018-05-04 | 2018-09-18 | 中国建筑第四工程局有限公司 | A kind of mud sleeve auxiliary Double-Wall Steel Boxed Cofferdam sinking construction method |
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| CN204385753U (en) * | 2014-12-22 | 2015-06-10 | 江苏省交通科学研究院股份有限公司 | A kind of double-wall corrugated steel cofferdam |
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| CN111042164A (en) * | 2019-12-31 | 2020-04-21 | 湖北省路桥集团有限公司 | Composite special-shaped cofferdam and construction method |
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| CN113417302A (en) * | 2021-06-29 | 2021-09-21 | 中铁大桥局集团第五工程有限公司 | Construction method of deep-water double-wall steel pouring jacket cofferdam on embankment slope surface |
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Application publication date: 20191122 |