CN108222041A - Large-sized deep water basis single wall steel boxed cofferdam construction - Google Patents
Large-sized deep water basis single wall steel boxed cofferdam construction Download PDFInfo
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- CN108222041A CN108222041A CN201810183755.8A CN201810183755A CN108222041A CN 108222041 A CN108222041 A CN 108222041A CN 201810183755 A CN201810183755 A CN 201810183755A CN 108222041 A CN108222041 A CN 108222041A
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- steel
- cofferdam
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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
Abstract
The invention discloses a kind of large-sized deep water basis single wall steel boxed cofferdam constructions, it chooses main pier steel boxed cofferdam and selects single-wall structure, main pier bearing platform is arranged in the construction of letter river dry season, with reference to analysis of hydrological data, water level of the Huanghai Sea elevation in dry season is positive 24.0 meters, cofferdam water level of setting up defences takes positive 24.20 meters, wave resistance height is by 0.30 meter of consideration, that is a height of positive 24.50 meters of cofferdam top mark, positive 13.0 meters of cushion cap bottom surface absolute altitude, 3.0 meters of bottoming concrete thickness, then cofferdam bottom absolute altitude take positive 10.0 meters, steel jacket box total height is designed as 14.50 meters.Side plate of the present invention carries out interim water proof with bottom concrete composition enclosed construction, drain the water in cofferdam, by the use of casing side plate as bearing platform construction template, realize construction bearing platform, pier shaft in precast-boxed cofferdam, the waste of manpower and materials is reduced, operation difficulty reduces, and mechanization degree is high, construction is time-consuming short, can be used for the equipment construction on large-sized deep water basis.
Description
Technical field
The present invention relates to cofferdam construction technical fields more particularly to a kind of large-sized deep water basis single wall steel boxed cofferdam to construct
Engineering method.
Background technology
Cofferdam refers in hydraulic engineering construction, for the permanent water conservancy projects of construction, the provisional building enclosure built,
Effect is to prevent water and soil from entering building and building position, and so as in cofferdam internal drainage, excavation pit builds building, one
As be mainly used in waterwork, except as formal building a part in addition to, cofferdam is generally removed after being finished, cofferdam height
Higher than the peak level being likely to occur in the construction time；Existing large-sized deep water basis cofferdam equipment is implemented to need a large amount of manpower object
Power, operation difficulty is larger, and mechanization degree is relatively low, and time-consuming for construction, and invention is generally used for low stake according to the bottomless steel jacket box of single wall
Bearing platform construction, the box structure being mainly made of side plate and inner support form interim stop water together with bottom concrete
It constructs.
Invention content
Technical problems based on background technology, the present invention propose a kind of large-sized deep water basis single wall steel boxed cofferdam
Construction.
A kind of large-sized deep water basis single wall steel boxed cofferdam construction proposed by the present invention, includes the following steps：
S1：According to geological and hydrological conditions and construction experience at bridge bridge site, main pier steel boxed cofferdam selects single-wall structure, main
Pier cushion cap is arranged in the construction of letter river dry season, and with reference to analysis of hydrological data, water level of the Huanghai Sea elevation in dry season is positive 24.0 meters,
Cofferdam water level of setting up defences takes positive 24.20 meters, and wave resistance height is by 0.30 meter of consideration, i.e. a height of positive 24.50 meters of cofferdam top mark, cushion cap bottom surface
Positive 13.0 meters of absolute altitude, 3.0 meters of bottoming concrete thickness, then cofferdam bottom absolute altitude take positive 10.0 meters, steel jacket box total height is designed as
14.50 meters；
S2：Making demand of the raw material for side plate and adjusting block is purchased, 180 × 110 × 12 angle steel of ∠ is used between block and block
Connecting flange is done, 2 row's spacing are set on flange as 20 centimetres, a diameter of 20 millimeters of hole, by quincuncial arrangement, diameter 18
The bolt connection plate making of millimeter needs material to have 6 millimeters of steel plates, 8 millimeters of panels, 10 channel steel cross ribs, 18 channel steels to erect rib, ∠
180 × 110 × 12 angle steel flanges, 25a make outer waistband and 30b makees interior waistband, the diameter specifications equipped with 25a diagonal braces are 820 millimeters
Steel pipe that × 8 millimeters of steel pipe, the diameter specifications equipped with 25a diagonal braces are 630 millimeters × 8 millimeters, diameter specifications are 630 millimeters ×
The stent that 8 millimeters of steel pipe, the steel pipe that diameter specifications are 402 millimeters × 6 millimeters, straight support are 2I45b；
S3：After making, carry out side plate and adjustable plate is directly assembled, during assembled, drilling platform is repacked into
Cofferdam platform for lining, the upper bracket of steel stove cylinder welding therein are supported, after welding, need to carry out steel bushing box structure inspection
It calculates；
S4：Steel cofferdam structure checking computations refer to calculate using MIDAS/Civil software computers modeling analysis, mainly to casing
Intensity, whole resistant slide, whole antidumping and whole anti-uplift stability are checked, and checking computations are divided into three parts, first part
For cofferdam structure intensity operating mode, second part is stability checking computations after back cover, and Part III is tested for bottom concrete stress
It calculates；
S5:It after checking computations, is positioned, cofferdam positioning device puts volume field machine using ten tablecloths, and ten tablecloths put volume field machine
Respectively in surrounding with one four four one distributions, stationary steel bushing case is transferred；
S6：Then suck sediment subsidence is carried out, clear base and levelling, back cover in cofferdam, draws water and blocks up slot, is ensured steady after decentralization
It is qualitative；
S7：Finally carry out dismounting steel boxed cofferdam.
Preferably, the system of processing sets up platform, and steel jacket box bottom including steel jacket box, side plate, adjustable plate and steel jacket box
Corbels support is welded at portion's fascia edge, steel jacket box sets up platform both sides outer wall and is fixed with ten hoist engines by screw, and ten
The output terminal of platform hoist engine is fixed on by steel wire rope on the outer wall of steel jacket box both sides.
Preferably, the steel jacket box sets up table top outer wall and is fixed with ten pulley blocks, and ten pulleys by screw
Group includes six groups of wheel pulley blocks, and six groups of roller group opposite side inner walls slidably connect a diameter of 22 millimeters of steel wire
Rope, steel wire rope one end is fixed on the input terminal of hoist engine.
Preferably, the steel jacket box sets up table top outer wall and is fixed with air compressor machine, and the pneumatics of air compressor machine by screw
Area is 12m3, the input terminal of air compressor machine is connected with switch, and switch is connected with controller, controller model DATA-7311.
Preferably, the bottom outer wall of the steel jacket box is connected with back cover, and back cover is the disposable back cover knot of rigid conduit method
Structure, is plugged with conduit mouth in back cover bottom outer wall, conduit mouth bottom outer wall and steel jacket box set up between the basal plane of platform there are
Gap, gap size are 13 to 16 centimetres.
Preferably, side plate both sides outer wall is provided with water level regulation hole, and water level regulation hole bottom outer wall and steel jacket box
It sets up there are gap between the substrate of platform, gap size is 19 to 21 centimetres.
Having the beneficial effect that in the present invention：It is welded on the cofferdam platform for lining and steel pile casting converted based on drilling platform
Corbels support, it is whole as cofferdam using more hoist engines and pulley blocks using crane barge cooperation assembly steel cofferdam on platform in water
Body promotes lower sinking system, and steel bushing caisson sinking latus inframedium is inserted directly into riverbed, clear in casing by suck sediment subsidence to designed elevation
Base, it is levelling after, pour bottom concrete, side plate carries out interim water proof with bottom concrete composition enclosed construction, drains in cofferdam
Water, by the use of casing side plate as bearing platform construction template, realize construction bearing platform, pier shaft in precast-boxed cofferdam, reduce manpower and materials
Waste, operation difficulty reduces, and mechanization degree is high, and construction takes short, can be used for the equipment construction on large-sized deep water basis.
Description of the drawings
Fig. 1 is a kind of flow chart of large-sized deep water basis single wall steel boxed cofferdam construction proposed by the present invention；
Fig. 2 is a kind of cofferdam planar structure of large-sized deep water basis single wall steel boxed cofferdam construction proposed by the present invention
Figure；
Fig. 3 is a kind of cofferdam side, sectional of large-sized deep water basis single wall steel boxed cofferdam construction proposed by the present invention
Figure.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.
With reference to Fig. 1-3, a kind of large-sized deep water basis single wall steel boxed cofferdam construction includes the following steps：
S1：Main pier steel boxed cofferdam selects single-wall structure, and main pier bearing platform is arranged in the construction of letter river dry season, is provided with reference to the hydrology
Material analysis, Huanghai Sea elevation dry season water level for positive 24.0 meters, cofferdam water level of setting up defences takes positive 24.20 meters, and wave resistance height is pressed
0.30 meter of consideration, i.e. a height of positive 24.50 meters of cofferdam top mark, positive 13.0 meters of cushion cap bottom surface absolute altitude, 3.0 meters of bottoming concrete thickness,
Then cofferdam bottom absolute altitude takes positive 10.0 meters, and steel jacket box total height is designed as 14.50 meters；
S2：Plate making need material have 6 millimeters of steel plates, 8 millimeters of panels, 10 channel steel cross ribs, 18 channel steels erect rib, ∠ 180 ×
110 × 12 angle steel flanges, 25a make outer waistband and 30b makees interior waistband, the diameter specifications equipped with 25a diagonal braces are 820 millimeters × 8 millis
Rice steel pipe, the diameter specifications equipped with 25a diagonal braces be 630 millimeters × 8 millimeters steel pipe, diameter specifications be 630 millimeters × 8 millimeters
Steel pipe, the steel pipe that diameter specifications are 402 millimeters × 6 millimeters, straight support be 2I45b stent；
S3：During assembly, drilling platform is repacked into cofferdam platform for lining, the upper bracket of steel stove cylinder welding therein carries out
Support after welding, needs to carry out steel jacket box Structure Checking Method；
S4：Checking computations are divided into three parts, and first part is cofferdam structure intensity operating mode, and second part is steady for anti-floating after back cover
Qualitative checking computations, Part III are bottom concrete stress checking calculation；
S5:It after checking computations, is positioned, cofferdam positioning device puts volume field machine using ten tablecloths, and ten tablecloths put volume field machine
Respectively in surrounding with one four four one distributions, stationary steel bushing case is transferred；
S6：Then suck sediment subsidence is carried out, clear base and levelling, back cover in cofferdam, draws water and blocks up slot, is ensured steady after decentralization
It is qualitative；
S7：Finally carry out dismounting steel boxed cofferdam.
In the present invention, system of processing sets up platform, and steel jacket box bottom including steel jacket box, side plate, adjustable plate and steel jacket box
Corbels support is welded at fascia edge, steel jacket box sets up platform both sides outer wall and is fixed with ten hoist engines by screw, ten
The output terminal of hoist engine is fixed on by steel wire rope on the outer wall of steel jacket box both sides, and steel jacket box sets up table top outer wall and passes through spiral shell
Nail is fixed with ten pulley blocks, and ten pulley blocks include six groups of wheel pulley blocks, and six groups of roller group opposite side inner walls slide
A diameter of 22 millimeters of steel wire rope is connected with, steel wire rope one end is fixed on the input terminal of hoist engine, and steel jacket box is set up flat
Platform top exterior walls are fixed with air compressor machine by screw, and the pneumatics area of air compressor machine is 12m3, the input terminal of air compressor machine is connected with
Switch, switch are connected with controller, controller model DATA-7311, and the bottom outer wall of steel jacket box is connected with back cover, and back cover
For the disposable back cover structure of rigid conduit method, conduit mouth, conduit mouth bottom outer wall and steel jacket box are plugged in back cover bottom outer wall
It is 13 to 16 centimetres to set up between the basal plane of platform there are gap, gap size, and side plate both sides outer wall is provided with water level tune
Knothole, and water level regulation hole bottom outer wall and steel jacket box are set up between the substrate of platform there are gap, gap size for 19 to
21 centimetres.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,
Any one skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (6)
1. a kind of large-sized deep water basis single wall steel boxed cofferdam construction, includes the following steps：
S1：According to geological and hydrological conditions and construction experience at bridge bridge site, main pier steel boxed cofferdam selects single-wall structure, and main pier is held
Platform is arranged in the construction of letter river dry season, and with reference to analysis of hydrological data, water level of the Huanghai Sea elevation in dry season is positive 24.0 meters, cofferdam
Water level of setting up defences takes positive 24.20 meters, and wave resistance height is by 0.30 meter of consideration, i.e. a height of positive 24.50 meters of cofferdam top mark, cushion cap bottom surface absolute altitude
Positive 13.0 meters, 3.0 meters of bottoming concrete thickness, then cofferdam bottom absolute altitude take positive 10.0 meters, steel jacket box total height is designed as 14.50
Rice；
S2：Making demand of the raw material for side plate and adjusting block is purchased, is done and connected using 180 × 110 × 12 angle steel of ∠ between block and block
Acting flange sets 2 row's spacing as 20 centimetres, a diameter of 20 millimeters of hole on flange, and by quincuncial arrangement, diameter is 18 millimeters
Bolt connection plate making need material have 6 millimeters of steel plates, 8 millimeters of panels, 10 channel steel cross ribs, 18 channel steels erect rib, ∠ 180 ×
110 × 12 angle steel flanges, 25a make outer waistband and 30b makees interior waistband, the diameter specifications equipped with 25a diagonal braces are 820 millimeters × 8 millis
Rice steel pipe, the diameter specifications equipped with 25a diagonal braces be 630 millimeters × 8 millimeters steel pipe, diameter specifications be 630 millimeters × 8 millimeters
Steel pipe, the steel pipe that diameter specifications are 402 millimeters × 6 millimeters, straight support be 2I45b stent；
S3：After making, carry out side plate and adjustable plate is directly assembled, during assembled, repack drilling platform into cofferdam
Platform for lining, the upper bracket of steel stove cylinder welding therein are supported, after welding, need to carry out steel jacket box Structure Checking Method；
S4：Steel cofferdam structure checking computations refer to calculate using MIDAS/Civil software computers modeling analysis, mainly to the strong of casing
Degree, whole resistant slide, whole antidumping and whole anti-uplift stability are checked, and checking computations are divided into three parts, and first part is
Cofferdam structure intensity operating mode, second part are stability checking computations after back cover, and Part III is bottom concrete stress checking calculation；
S5:It after checking computations, is positioned, cofferdam positioning device puts volume field machine using ten tablecloths, and ten tablecloths put volume field machine difference
In surrounding with one four four one distributions, stationary steel bushing case is transferred；
S6：Then suck sediment subsidence is carried out, clear base and levelling, back cover in cofferdam, draws water and blocks up slot, ensures the stabilization after decentralization
Property；
S7：Finally carry out dismounting steel boxed cofferdam.
2. a kind of large-sized deep water basis single wall steel boxed cofferdam construction according to claim 1, passes through system of processing
Implemented, which is characterized in that the system of processing sets up platform, and steel bushing including steel jacket box, side plate, adjustable plate and steel jacket box
Corbels support is welded at bottom portion fascia edge, steel jacket box sets up platform both sides outer wall and is fixed with ten elevators by screw
Machine, the output terminal of ten hoist engines are fixed on by steel wire rope on the outer wall of steel jacket box both sides.
3. a kind of system of processing of large-sized deep water basis single wall steel boxed cofferdam construction according to claim 2,
It is characterized in that, the steel jacket box sets up table top outer wall and is fixed with ten pulley blocks by screw, and ten pulley blocks include
There are six groups of wheel pulley blocks, six groups of roller group opposite side inner walls slidably connect a diameter of 22 millimeters of steel wire rope, steel wire
Rope one end is fixed on the input terminal of hoist engine.
4. a kind of system of processing of large-sized deep water basis single wall steel boxed cofferdam construction according to claim 2,
It is characterized in that, the steel jacket box sets up table top outer wall and is fixed with air compressor machine by screw, and the pneumatics area of air compressor machine is
12m3, the input terminal of air compressor machine is connected with switch, and switch is connected with controller, controller model DATA-7311.
5. a kind of system of processing of large-sized deep water basis single wall steel boxed cofferdam construction according to claim 2,
It is characterized in that, the bottom outer wall of the steel jacket box is connected with back cover, and back cover is the disposable back cover structure of rigid conduit method, back cover
It is plugged with conduit mouth in bottom outer wall, conduit mouth bottom outer wall and steel jacket box set up between the basal plane of platform that there are gap, gaps
Size is 13 to 16 centimetres.
6. a kind of system of processing of large-sized deep water basis single wall steel boxed cofferdam construction according to claim 2,
Be characterized in that, side plate both sides outer wall is provided with water level regulation hole, and water level regulation hole bottom outer wall and steel jacket box set up it is flat
There are gap between the substrate of platform, gap size is 19 to 21 centimetres.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810183755.8A CN108222041A (en) | 2018-03-06 | 2018-03-06 | Large-sized deep water basis single wall steel boxed cofferdam construction |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810183755.8A CN108222041A (en) | 2018-03-06 | 2018-03-06 | Large-sized deep water basis single wall steel boxed cofferdam construction |
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| CN108222041A true CN108222041A (en) | 2018-06-29 |
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| CN201810183755.8A Pending CN108222041A (en) | 2018-03-06 | 2018-03-06 | Large-sized deep water basis single wall steel boxed cofferdam construction |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111119213A (en) * | 2019-12-18 | 2020-05-08 | 中建三局基础设施建设投资有限公司 | Double-wall steel cofferdam with open edge feet and construction method thereof |
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| CN201891123U (en) * | 2010-11-16 | 2011-07-06 | 中铁二十四局集团有限公司 | Single-wall steel hanging box with concrete bottom plate |
| CN103821157A (en) * | 2014-02-27 | 2014-05-28 | 山东省路桥集团有限公司 | Wallboard lattice type steel cover box and method for constructing underwater bearing platform steel cover box |
| CN103835300A (en) * | 2014-01-22 | 2014-06-04 | 中铁大桥局集团第五工程有限公司 | Inner-support-free double-wall locking mouth steel bushing box cofferdam construction method and cofferdam |
| CN107034908A (en) * | 2017-06-20 | 2017-08-11 | 中铁二十四局集团新余工程有限公司 | A kind of steel boxed cofferdam integral elevating equipment |
| CN107044129A (en) * | 2017-01-20 | 2017-08-15 | 中国葛洲坝集团第六工程有限公司 | A kind of bottomless single wall steel boxed cofferdam of piecemeal pin-connected panel and its construction method |
| CN206554099U (en) * | 2017-01-20 | 2017-10-13 | 中国葛洲坝集团第六工程有限公司 | A kind of bottomless single wall steel boxed cofferdam of piecemeal pin-connected panel |
-
2018
- 2018-03-06 CN CN201810183755.8A patent/CN108222041A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201891123U (en) * | 2010-11-16 | 2011-07-06 | 中铁二十四局集团有限公司 | Single-wall steel hanging box with concrete bottom plate |
| CN103835300A (en) * | 2014-01-22 | 2014-06-04 | 中铁大桥局集团第五工程有限公司 | Inner-support-free double-wall locking mouth steel bushing box cofferdam construction method and cofferdam |
| CN103821157A (en) * | 2014-02-27 | 2014-05-28 | 山东省路桥集团有限公司 | Wallboard lattice type steel cover box and method for constructing underwater bearing platform steel cover box |
| CN107044129A (en) * | 2017-01-20 | 2017-08-15 | 中国葛洲坝集团第六工程有限公司 | A kind of bottomless single wall steel boxed cofferdam of piecemeal pin-connected panel and its construction method |
| CN206554099U (en) * | 2017-01-20 | 2017-10-13 | 中国葛洲坝集团第六工程有限公司 | A kind of bottomless single wall steel boxed cofferdam of piecemeal pin-connected panel |
| CN107034908A (en) * | 2017-06-20 | 2017-08-11 | 中铁二十四局集团新余工程有限公司 | A kind of steel boxed cofferdam integral elevating equipment |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111119213A (en) * | 2019-12-18 | 2020-05-08 | 中建三局基础设施建设投资有限公司 | Double-wall steel cofferdam with open edge feet and construction method thereof |
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