CN106120824B - A kind of underwater adaptive steel cofferdam of bottom absolute altitude that can quickly remove - Google Patents
A kind of underwater adaptive steel cofferdam of bottom absolute altitude that can quickly remove Download PDFInfo
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- CN106120824B CN106120824B CN201610698828.8A CN201610698828A CN106120824B CN 106120824 B CN106120824 B CN 106120824B CN 201610698828 A CN201610698828 A CN 201610698828A CN 106120824 B CN106120824 B CN 106120824B
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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 present invention relates to underwater cofferdam technical field of structures, in particular to a kind of underwater adaptive steel cofferdam of bottom absolute altitude that can quickly remove.Including being superimposed cofferdam and lower cofferdam in the annular of placement up and down；Lower cofferdam is socketed on cofferdam, and lower cofferdam is intermeshed the annular construction member to be formed for more root long bars；Both sides are provided with engaging structure to stock in the circumferential direction, stock can be slided up and down to by engaging structure to be connected with adjacent stock, more root long bars are mutually twisted the cofferdam structure that head and the tail connection forms annular, and the upper end of stock sets the position limiting structure that restricted stock is deviate from downwards from upper cofferdam；The buckle structure that upper cofferdam is disassembled into two independent sectors is provided on upper cofferdam circumferential side wall.The present invention can be applied to various water-bed scar situations by the lower cofferdam of adaptive water-bed absolute altitude, solves the difficulty and unsafe problems of underwater construction, the recycling of cofferdam structure is realized by dismountable structure, reduces production cost.
Description
Technical field
The present invention relates to underwater cofferdam technical field of structures, adaptive in particular to a kind of underwater bottom absolute altitude that can quickly remove
Answer steel cofferdam.
Background technology
Underwater cofferdam is chiefly used in naked petrographic province drilled pile construction, after steel-pipe pile squeezes into rock stratum certain depth, is enclosed by pouring
Underwater concrete increases the frictional force of steel-pipe pile and basement rock, the stability for improving steel-pipe pile, avoids in steel-pipe pile internal drilling in weir
When base opening spillage and steel-pipe pile sinking platform is caused to cave in.The prior art is frequently with bagged concrete cofferdam, steel construction cofferdam etc.
Scheme.
For bagged concrete cofferdam scheme, diver need to be sent to enclose coagulation along certain distance pile one on the outside of steel-pipe pile base opening
Earth bag forms underwater cofferdam, for the depth of water compared with it is deep, flow velocity is larger, exposed Dou Yan waters, bagged concrete is easily tumbled along steep scar
Or washed away by flow, cofferdam quality is difficult to ensure that, program construction safety risk is big, and long construction period is of high cost.
For steel construction cofferdam scheme, detailed exploration need to be carried out to underwater topography, when making cofferdam bottom under water
Shape matches, for the depth of water compared with it is deep, flow velocity is larger, exposed Dou Yan waters, since topographic(al) reconnaissance and cofferdam construction are there are error,
Exist between bottom and scar compared with big gap after being transferred in cofferdam to scar, need the underwater caulking joint of diver, underwater concreting
Cofferdam can not remove afterwards, it is impossible to be used in turn, program construction safety risk is big, and long construction period is of high cost.
Invention content
Present invention aim to solve the deficiency of above-mentioned background technology, a kind of underwater bottom mark that can quickly remove is provided
High adaptive steel cofferdam.
The technical scheme is that：A kind of underwater adaptive steel cofferdam of bottom absolute altitude that can quickly remove, it is characterised in that：
Including being superimposed cofferdam and lower cofferdam in the annular of placement up and down；The lower cofferdam can be socketed on cofferdam up or down,
And it is coaxially arranged with upper cofferdam, lower cofferdam is intermeshed the annular construction member to be formed for more root long bars；The stock is circumferentially square
To both sides be provided with engaging structure, stock can be slided up and down to by engaging structure to be connected with adjacent stock, more
Stock is mutually twisted the cofferdam structure that connection from beginning to end forms annular, and the upper end of stock sets restricted stock downward from upper cofferdam
The position limiting structure of abjection；The lock knot that upper cofferdam is disassembled into two independent sectors is provided on the upper cofferdam circumferential side wall
Structure.
The further upper cofferdam includes inner ring and the outer shroud being socketed on the outside of inner ring；The inner ring and outer rings are
Two pieces of arc panels connect the annular construction member to be formed by buckle structure, and inner ring and outer rings are coaxially arranged, and outer shroud is consolidated by anchor plate
It is scheduled on the periphery end face of inner ring, there are the gaps that lower cofferdam passes through between inner ring and outer rings；The lower cofferdam is along axis
Line can up or down ring set between inner ring and outer rings.
The further buckle structure includes connecting plate；It is provided with radially at the both ends open of the arc panel
Outwardly extending otic placode is provided with corresponding connecting plate on every piece of otic placode, positioned at two pieces of otic placodes of inner ring and outer rings homonymy
It is held between two pieces of connecting plates, two pieces of otic placodes are fixedly connected by passing perpendicularly through the bolt of otic placode and connecting plate with connecting plate.
Offer that bolt passes through on the otic placode passes through slot；Described is located at otic placode side by slot upper end
The opening-like state in portion, vertically inclined direction extends to the middle part of otic placode for lower end；The bolt is vertically arranged in by slot.
Cushion block is provided between the further connecting plate and otic placode；The cushion block includes the first cushion block and is located at
The second cushion block between first cushion block and otic placode；Offered on first cushion block bolt by screw hole, the first cushion block face
To the side of the second cushion block, thickness is gradually reduced to form the first up big and down small slope surface from top to bottom；It is opened on second cushion block
Equipped with bolt by U-type groove, the second cushion block towards the first cushion block side thickness gradually increase forms up-small and down-big second
Slope surface；First slope surface is fitted in the second slope surface.
The further engaging structure includes being fixed on stock both sides with the symmetrical buckle of the central point of stock；It is described
Buckle include being fixed on the riser, transverse slat and short slab of stock side, transverse slat is fixed on riser end, and short slab is fixed on tabula end
Portion, riser, transverse slat and short slab are in turn connected to form the bending platy structure of " J " type.
The guider being supported in the horizontal direction on steel-pipe pile is provided on the inside of the further upper cofferdam.
The further guider includes supporting rack, and supporting rack one end is fixed on the inside circumference end face of inner ring
On, extend at the inside ring center of the other end, supporting rack be provided on the end far from inner ring be fitted in steel-pipe pile side wall can edge
The idler wheel of steel-pipe pile scroll-up/down.
The further position limiting structure includes the boss positioned at stock upper end side；It is remote that the boss is located at stock
Side from inner ring, boss are hooked on the upper end of outer shroud when stock lower end does not stress.
Further inner ring upper end and connecting plate upper end are both provided with lifting lug.
Advantages of the present invention has：1st, the present invention is composed lower cofferdam, stock by multiple stocks for being mutually twisted connection
It can vertically relatively move between each other, the lower cofferdam of self adjustment can be carried out with water-bed scar situation, can adapt to scar structure not
Smooth region avoids the insecurity of underwater construction；
2nd, lower cofferdam of the invention can be conveniently fitted on scar, without being blocked to cofferdam bottom, just
It can quickly realize the construction process in cofferdam, whole operation process is simple and convenient, and security performance is high, improves construction efficiency；
3rd, lower cofferdam demolition of the invention is convenient, applies upward active force by the upper end to connecting plate, can be quick
Upper cofferdam is resolved into two independent parts, be detached from cofferdam internal structure from side, pass through respectively in handling cofferdam two
A part, it may be convenient to two parts are resolved into lower cofferdam, it is convenient and efficient to remove work；
4th, the present invention realizes the recycling of structural device, improves construction efficiency by disassembled cofferdam structure
While, the cost of construction is reduced, cofferdam recycles the cost for reducing entire engineering, has great promotional value.
The present invention can be applied to various water-bed scar situations by the lower cofferdam of adaptive water-bed absolute altitude, solve underwater
The difficulty and unsafe problems of construction, the recycling of cofferdam structure is realized by dismountable structure, reduces and is produced into
This, has great promotional value.
Description of the drawings
Fig. 1：The axonometric drawing in the cofferdam of the present invention；
Fig. 2：The cofferdam mounting structure schematic diagram of the present invention；
Fig. 3：The detaching structure schematic diagram in the upper cofferdam of the present invention；
Fig. 4：The lower cofferdam structure schematic diagram of the present invention；
Fig. 5：The long rod structure schematic diagram of the present invention；
Fig. 6：The cross-sectional view of the stock of the present invention；
Fig. 7：The connecting plate of the present invention and otic placode connection structure exploded perspective view；
Fig. 8：The structure diagram of the first gasket of the present invention；
Fig. 9：The structure diagram of the second gasket of the present invention；
Figure 10：The axonometric drawing of the guide frame of the present invention；
Wherein：1-upper cofferdam；1.1-inner ring；1.2-outer shroud；1.3-anchor plate；2-lower cofferdam；2.1-stock；
2.2-riser；2.3-transverse slat；2.4-short slab；3-connecting plate；4-otic placode；5-bolt；6-pass through slot；7-the first pad
Block；8-the second cushion block；9-screw hole；10-U-type groove；11-the first slope surface；12-the second slope surface；13-steel-pipe pile；14-
Support；15-idler wheel；16-boss；17-lifting lug.
Specific embodiment
The present invention is described in further detail in the following with reference to the drawings and specific embodiments.
Such as Fig. 1~10, a kind of underwater adaptive steel cofferdam of bottom absolute altitude that can quickly remove, the ring including being superimposed placement up and down
Cofferdam 1 and lower cofferdam 2, the present embodiment mainly adapt to underwater scar absolute altitude by lower cofferdam 2 in shape.
As shown in Figures 4 and 5, the annular construction member that the lower cofferdam 2 of the present embodiment is formed for the intermeshing of more root long bars 2.1, it is long
Both sides are provided with engaging structure to bar 2.1 in the circumferential direction, and stock 2.1 can be slided up and down to and adjacent length by engaging structure
Bar 2.1 is connected, and more root long bars 2.1 are mutually twisted the cofferdam structure that head and the tail connection forms annular.Instantly water is transferred in cofferdam 2
Behind bottom, 2.1 lower end of the stock contact scar on lower cofferdam 2, by the resistance of scar, the lower end of stock 2.1 is supported on scar
It is interleaved next in the up-down direction with adjacent stock 2.1, the water-bed scar of different level is adapted to this, stock 2.1 is in side
Portion is mutually twisted to form near-hermetic structure, is surrounded by cofferdam, lower cofferdam 2 and scar good fit, without using artificial underwater
It blocks.
The engaging structure of the present embodiment includes being fixed on 2.1 both sides of stock with the symmetrical buckle of the central point of stock 2.1, button
Plate includes the riser 2.2, transverse slat 2.3 and short slab 2.4 that are fixed on 2.1 side of stock, and transverse slat 2.3 is fixed on 2.2 end of riser, short
Plate 2.4 is fixed on 2.3 end of transverse slat, and riser 2.2, transverse slat 2.3 and short slab 2.4 are in turn connected to form the bending plate knot of " J " type
Structure.There is the angle less than 90 ° between riser 2.2 and stock 2.1, this angle is designed according to the size in lower cofferdam 2.Adjacent length
Buckle intermeshing connection on bar 2.1.More root long bars 2.1, which are intermeshed, to join end to end to form the cofferdam structure of annular.
2 ring set of lower cofferdam of the present embodiment is on upper cofferdam 1, during handling, passes through cofferdam in handling 1 and arrives suitable installation position
It puts, completes the adaptive installation in lower cofferdam 2.As shown in Figures 1 to 3, the upper cofferdam 1 of the present embodiment includes the interior of superposition placement up and down
Ring 1.1 and outer shroud 1.2, inner ring 1.1 and outer shroud 1.2 connect the annular construction member to be formed by buckle structure for two pieces of arc panels, interior
Ring 1.1 and outer shroud 1.2 are coaxially arranged, and outer shroud 1.2 is fixed on by anchor plate 1.3 on the periphery end face of inner ring 1.1, this reality
The anchor plate 1.3 for applying example is L-type structure, and one end is fixed on the outer circumference end face of inner ring 1.1, and the other end is fixed on outer shroud
On 1.2 periphery end face.
There are the gap that lower cofferdam 2 passes through between inner ring 1.1 and outer shroud 1.2, lower cofferdam 2 can ring up or down along axis
It is sleeved between inner ring 1.1 and outer shroud 1.2.The inner ring 1.1 of the present embodiment is longer than outer shroud 1.2 in vertical height, when all length
The lower end of bar 2.1 drops to the cofferdam structure that formation is bonded with scar on scar, and inner ring 1.1 continues downwards under gravity
Mobile, when inner ring 1.1 drops to the peak of scar, upper cofferdam 1 is stable under the supporting role of steel-pipe pile 13 in water, interior
Other positions of 1.1 lower end of ring are suspended in above scar.
The upper end of the stock 2.1 of the present embodiment is provided with position limiting structure, and the position limiting structure includes being located on stock 2.1
The boss 16 in end side portion, boss 16 are located at side of the stock 2.1 far from inner ring 1.1, boss hook when 2.1 lower end of stock does not stress
Hang over the upper end of outer shroud 1.2.Cofferdam 1 and when lower cofferdam 2 in handling, boss 16 is fastened under the upper end support of outer shroud 1.2
Cofferdam 2.
In order to can quickly be removed entire cofferdam structure after being installed in place, the present embodiment is in the side in upper cofferdam 1
Portion is provided with buckle structure, as shown in fig. 7, buckle structure includes connecting plate 3, is provided with radially at the both ends open of arc panel
Outwardly extending otic placode 4 is provided with corresponding connecting plate 3 on every piece of otic placode 4, positioned at 1.2 homonymy of inner ring 1.1 and outer shroud
Two pieces of otic placodes 4 are held between two pieces of connecting plates 3, and two pieces of otic placodes 4 are by passing perpendicularly through the bolt 5 of otic placode 4 and connecting plate 3 with connecting
Fishplate bar 3 is fixedly connected.
Offer that bolt 5 passes through on otic placode 4 by slot 6, the opening-like state in otic placode side is located at by 6 upper end of slot, under
Vertically inclined direction extends to the middle part of otic placode 4 at end, and bolt 5 can be from by being detached from otic placode 4 at 6 upper end opening of slot, bolt 5 hangs down
Direct puncture is set on by slot 6.When needing to remove, apply active force straight up to connecting plate 3, connecting plate 3 drive bolt 5 from
By at the upper end opening of slot 6 be detached from otic placode 4, complete two be partially separated, then respectively in handling cofferdam 1 two portions
Point, complete the dismounting in cofferdam.
In order to increase the being completely embedded property between connecting plate 3 and otic placode 4, set between the connecting plate 3 of the present embodiment and otic placode 4
Cushion block is equipped with, cushion block includes the first cushion block 7 being fixed on connecting plate 3 and being fixed between the first cushion block 7 and otic placode 4
The second cushion block 8 on otic placode 4, offer on the first cushion block 7 bolt 5 by screw hole 9, it is logical to offer bolt 5 on the second cushion block 8
The U-type groove 10 crossed.Bolt 5 sequentially passes through connecting plate 3, the first gasket 7, the second gasket 8 and otic placode, and connecting plate 3 and otic placode 4 are consolidated
Fixed connection.It is partially separated in order to not influence upper 1 two, cofferdam, as shown in Fig. 8~9, the first cushion block of the present embodiment 7 towards second
Thickness is gradually reduced to form the first up big and down small slope surface 11 from top to bottom for the side of cushion block 8, and the second cushion block 8 is towards the first cushion block
Gradually increase forms the second up-small and down-big slope surface 12 to 7 side thickness, and the first slope surface 11 is fitted in the second slope surface 12.Upwards
When applying active force, the first gasket 7 and the second gasket are completed in the sliding of the first slope surface 11 and the second slope surface 12 generation upper and lower directions
8 disengagement.
During actual installation, in order to ensure cofferdam installation accuracy, avoid under handling cofferdam during water, cofferdam by
Impact to flow is provided with guide frame without can be located at accurate position, the present embodiment in the inside in upper cofferdam 1.
As shown in Figure 10, the guider of the present embodiment includes supporting rack 14, and 14 one end of supporting rack is fixed on inner ring 1.1
On inside circumference end face, the other end extends to 1.1 circle centre position of inner ring, and supporting rack 14 is provided with patch on the end far from inner ring 1.1
Close in 13 side wall of steel-pipe pile can be along the idler wheel 15 of 13 scroll-up/down of steel-pipe pile.Its axis of idler wheel 15 is arranged in transverse direction, is rolled
The both ends of wheel 15 are rotatably articulated and connected on supporting rack 14, and during cofferdam is transferred, idler wheel 15 is fitted in steel-pipe pile 13
Outside, limit the transverse shifting in cofferdam, ensure that cofferdam can transfer to accurate position.
In use, the first gap by stock 2.1 across inner and outer rings, the assembled connection shape in the gap between inside and outside
Into lower cofferdam 2, the upper end of inner ring 1.1 offers lifting lug 17, passes through cofferdam 1 in 17 handling of lifting lug and lower cofferdam 2 to steel-pipe pile 13
Top, adjust the position in cofferdam, make cofferdam and steel-pipe pile 13 coaxial, then transfer cofferdam, idler wheel 15 is made to be fitted in steel-pipe pile
Cofferdam is slowly transferred in 13 outside, and stock 2.1 is suspended on the upper end of outer shroud 1.2 by boss, when the lower end in contact of stock 2.1
During to scar, under the action of scar, stock 2.1 stops declining, and treats that all stocks 2.1 all touch scar formation and scar
After the closed cofferdam structure of fitting, inner ring 1.1 continues to move under gravity, when the lower end of inner ring 1.1 touches scar
Peak when, inner ring 1.1 is stable under the collective effect of scar and guide frame in water, and entire cofferdam structure passes through scar
Support with steel-pipe pile forms the closed loop configuration of fitting scar, as shown in Figure 2.
Start the pouring construction in cofferdam, after the completion for the treatment of the construction in cofferdam, using allocation and transportation equipment from hanging on connecting plate 3
Ear 17 applies upward active force, and bolt 5 is made to be detached from from by slot 6, and upper cofferdam 1 is divided into two independent parts, is hung respectively
Fortune two part rise, at this time the stock 2.1 below each independent sector under the action of 1.2 arch section of outer shroud with another portion
The stock 2.1 divided is detached from, and outer shroud 1.2 is followed to rise, and the dismounting in cofferdam is completed after handling respectively, after carrying out cleaning reparation to cofferdam
Applied to next construction point.
Basic principle, main feature and the advantages of the present invention of the present invention has been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention, various changes and improvements may be made to the invention without departing from the spirit and scope of the present invention, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent defines.
Claims (9)
1. a kind of underwater adaptive steel cofferdam of bottom absolute altitude that can quickly remove, it is characterised in that：Ring including being superimposed placement up and down
Cofferdam (1) and lower cofferdam (2) in shape；The lower cofferdam (2) can be socketed on cofferdam (1), and up or down with above enclosing
Weir (1) is coaxially arranged, the annular construction member that lower cofferdam (2) is formed for the intermeshing of more root long bars (2.1)；The stock (2.1)
Both sides are provided with engaging structure in the circumferential direction, and stock (2.1) can be slided up and down to and adjacent stock by engaging structure
(2.1) it is connected, more root long bars (2.1) are mutually twisted the cofferdam structure that head and the tail connection forms annular, the upper end of stock (2.1)
The position limiting structure that restricted stock (2.1) is set to deviate from downwards from upper cofferdam (1)；On described upper cofferdam (1) circumferential side wall
It is provided with the buckle structure that upper cofferdam (1) is disassembled into two independent sectors；The upper cofferdam (1) including inner ring (1.1) and
The outer shroud (1.2) being socketed on the outside of inner ring (1.1)；The inner ring (1.1) and outer shroud (1.2) pass through lock for two pieces of arc panels
Structure connects the annular construction member to be formed, and inner ring (1.1) and outer shroud (1.2) are coaxially arranged, and outer shroud (1.2) passes through anchor plate (1.3)
It is fixed on the periphery end face of inner ring (1.1), between being passed through between inner ring (1.1) and outer shroud (1.2) there are lower cofferdam (2)
Gap；The lower cofferdam (2) along axis can up or down ring set between inner ring (1.1) and outer shroud (1.2).
2. a kind of underwater adaptive steel cofferdam of bottom absolute altitude that can quickly remove as described in claim 1, it is characterised in that：It is described
Buckle structure include connecting plate (3)；The otic placode extended radially outward is provided at the both ends open of the arc panel
(4), corresponding connecting plate (3) is provided on every piece of otic placode (4), positioned at two pieces of inner ring (1.1) and outer shroud (1.2) homonymy
Otic placode (4) is held between two pieces of connecting plates (3), and two pieces of otic placodes (4) are by passing perpendicularly through the spiral shell of otic placode (4) and connecting plate (3)
Bolt (5) is fixedly connected with connecting plate (3).
3. a kind of underwater adaptive steel cofferdam of bottom absolute altitude that can quickly remove as claimed in claim 2, it is characterised in that：It is described
Otic placode (4) on offer that bolt (5) passes through by slot (6)；It is described otic placode (4) side is located at by slot (6) upper end to be in
Open state, vertically inclined direction extends to the middle parts of otic placode (4) for lower end；Vertical be arranged in of the bolt (5) passes through slot
(6) in.
4. a kind of underwater adaptive steel cofferdam of bottom absolute altitude that can quickly remove as claimed in claim 3, it is characterised in that：It is described
Connecting plate (3) and otic placode (4) between be provided with cushion block；The cushion block includes the first cushion block (7) and positioned at the first cushion block (7)
The second cushion block (8) between otic placode (4)；Offered on first cushion block (7) bolt (5) by screw hole (9), first
Towards the side of the second cushion block (8), thickness is gradually reduced to form up big and down small the first slope surface (11) cushion block (7) from top to bottom；Institute
Offered on the second cushion block (8) stated bolt (5) by U-type groove (10), the second cushion block (8) is towards the one of the first cushion block (7)
Gradually increase forms up-small and down-big the second slope surface (12) to side thickness；First slope surface (11) is fitted in the second slope surface (12)
On.
5. a kind of underwater adaptive steel cofferdam of bottom absolute altitude that can quickly remove as described in claim 1, it is characterised in that：It is described
Engaging structure include be fixed on stock (2.1) both sides with the symmetrical buckle of central point of stock (2.1)；The buckle includes
The riser (2.2), transverse slat (2.3) and short slab (2.4) of stock (2.1) side are fixed on, transverse slat (2.3) is fixed on riser (2.2)
End, short slab (2.4) are fixed on transverse slat (2.3) end, and riser (2.2), transverse slat (2.3) and short slab (2.4) are in turn connected to form
The bending platy structure of " J " type.
6. a kind of underwater adaptive steel cofferdam of bottom absolute altitude that can quickly remove as described in claim 1, it is characterised in that：It is described
Upper cofferdam (1) on the inside of be provided with the guider being supported in the horizontal direction on steel-pipe pile (13).
7. a kind of underwater adaptive steel cofferdam of bottom absolute altitude that can quickly remove as claimed in claim 6, it is characterised in that：It is described
Guider include supporting rack (14), supporting rack (14) one end is fixed on the inside circumference end face of inner ring (1.1), the other end
Extend to inner ring (1.1) circle centre position, supporting rack (14) is provided on the end far from inner ring (1.1) and is fitted in steel-pipe pile (13) side
Wall can be along the idler wheel (15) of steel-pipe pile (13) scroll-up/down.
8. a kind of underwater adaptive steel cofferdam of bottom absolute altitude that can quickly remove as described in claim 1, it is characterised in that：It is described
Position limiting structure include positioned at stock (2.1) upper end side boss (16)；The boss (16) is separate positioned at stock (2.1)
The side of inner ring (1.1), boss are hooked on the upper end of outer shroud (1.2) when stock (2.1) lower end does not stress.
9. a kind of underwater adaptive steel cofferdam of bottom absolute altitude that can quickly remove as described in claim 1, it is characterised in that：Inner ring
(1.1) upper end and connecting plate (3) upper end are both provided with lifting lug (17).
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| CN201610698828.8A CN106120824B (en) | 2016-08-22 | 2016-08-22 | A kind of underwater adaptive steel cofferdam of bottom absolute altitude that can quickly remove |
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| CN201610698828.8A CN106120824B (en) | 2016-08-22 | 2016-08-22 | A kind of underwater adaptive steel cofferdam of bottom absolute altitude that can quickly remove |
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| CN111206567B (en) * | 2020-01-20 | 2021-05-18 | 宁波市建筑设计研究院有限公司 | Construction method of steel pipe pile in combined pile based on PC construction method |
| CN113550338A (en) * | 2020-04-26 | 2021-10-26 | 胡宗山 | Cofferdam device for hydraulic engineering construction |
| CN111827323A (en) * | 2020-07-27 | 2020-10-27 | 华东交通大学 | Self-adaptive steel sleeve box device |
| CN113718807B (en) * | 2021-09-03 | 2023-05-26 | 安徽省公路桥梁工程有限公司 | Combined steel cofferdam structure with adjustable bottom and construction method thereof |
| CN115075271A (en) * | 2022-07-08 | 2022-09-20 | 四川公路桥梁建设集团有限公司 | Underwater dismantling method for steel-concrete structure of steel cofferdam |
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