CN104372803A - Combined type movable cofferdam for embankment danger elimination and reinforcement - Google Patents
Combined type movable cofferdam for embankment danger elimination and reinforcement Download PDFInfo
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- CN104372803A CN104372803A CN201410626963.2A CN201410626963A CN104372803A CN 104372803 A CN104372803 A CN 104372803A CN 201410626963 A CN201410626963 A CN 201410626963A CN 104372803 A CN104372803 A CN 104372803A
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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 relates to cofferdams of embankment projects for rivers and lakes, in particular to a combined type movable cofferdam for embankment danger elimination and reinforcement. The cofferdam comprises two uprights, grooves are formed in opposite sides of the two uprights, the two ends of a mutual buckling slab are installed in the grooves I of the two uprights respectively, inclined rails are installed at the lower ends of the two uprights respectively, the other ends of the two inclined rails are connected through a fixed shaft, the included angle between the uprights and the inclined rails is an acute angle, grooves II are formed in the upper sides of the inclined rails, the lower ends of mutual buckling side plates are installed in the grooves II, reinforcement plates I are arranged on the two sides of the upper end and the two sides of the lower end of the mutual buckling slab, and reinforcement plates II are arranged on the two sides of the upper end of each mutual buckling side plate. Compared with the prior art, the cofferdam has the advantages that when a flood danger happens during the flood season, water stopping treatment can be carried out in time, further deterioration of the danger can be avoided, the cofferdam is of a combined structure and is convenient to disassemble and capable of being repeatedly used, and time and labor are saved.
Description
Technical field
The present invention relates to the cofferdam of dyke building in a kind of river, river, lake, especially a kind of dyke reinforcement assembled moving cofferdam.
Background technology
The Huanghe valley is due to silted by mud and sand, and river shoal generally exceeds the outer 3 ~ 5m of dike, have more than 10m, formed " aboveground river ", add that embankment is that heightening and thickening is formed gradually on the basis of people's low bank between fields, quality is uneven, and hidden danger is many, and flood control situation is very severe.For removing a hidden danger, the anti-flood capacity of enhancement engineering, Standardization Dike construction is carried out in the Yellow River, while reinforcing embankment, carries out dyke strengthening by warping in its both sides.Present stage, disused well, covered conduit, grave in the gap that the hidden danger that China dyke building exists mainly comprises the cave of animal, rotted plant material is formed, dike, and the hidden danger existed in dyke self architectural process (bonding surface of bank crack, frozen soil block, new and old dike, workshop section's joint) etc., most of dyke is in flood season, once after running into the flood test that intensity is large, water level is high, hidden defect of levee will be completely exposed, add and factors such as being limited by dyke monitoring technology cause the Seawall safety also existing defects of China.
Lower Reaches of The Yellow River is " hanging river " on the North China Plain, and flood retrains into sea by two sides embankment entirely.Existing embankment constantly repairs and reinforce on the basis of history people low bank between fields, and basic condition is complicated, and is mostly sandy soil, anti-impact seepage capability is poor, and many dangerous points, hidden danger are not eliminated in addition at present, once there is great flood, not only all kinds of dangerous situation occurs in a large number, and dangerous situation development is very fast.It is large that these features and situation determine the Yellow River flood control difficulty, task of speedily carrying out rescue work weight.
Dyke is the important component part of flood-prevention project system, is resist flood and ensure the basic facilities of people across the Straits' security of the lives and property and last barrier.Because existing dyke is formed through repeatedly heightening and thickening by people's low bank between fields, old dike mostly, hidden danger is many, second-rate, after 1998 annual floods, country throws people's huge fund and carries out reinforcement to the great dyke such as the Changjiang river, the Yellow River, the flood control standard of a part of dyke is made to bring up to 50 ~ 100 years chances, but because China's dyke water front is long, task of reinforcing is also very arduous.
2002, the dangerous situation occurred compared with dyke during great flood is there is in history in Wang Xieliang etc. from the Yellow River, analyzing main dangerous situation is that embankment is under high water level long duration of action, occur when levee foundation seepage stability is destroyed, as infiltration, piping, stream soil, liquefaction etc., dark pool place after mostly occurring in history dam breach position, ancient stream channel remittance place and dike.Another kind of main dangerous situation be levee body under flood long period of soaking, soil shear strength is low, the dangerous situation such as leak, crack, landslide occurs, and proposes the countermeasure of reinforcement.
2003 years, the reason and characteristic that the expounds such as Guo Quanming Yellow River dyke dangerous situation occurs.Through adding up Dike Along Lower Yellow River danger point, dangerous section over the years, comprise Lao Koumen, piping, infiltration, crack, levee body incompleteness, levee body breach, suitable dike flood passage 7, wherein water penetration and deformation accounts for more than 46% of danger point sum, and this illustrates that seepage deformation problem is the matter of utmost importance of Yellow River dyke.End 2002, adopt dyke strengthening by warping, build front and back are clashed, the vertical measure such as cut-off wall, Cone drilling, it is complete that elimination is substantially put in the 113 dyke dangers, place that front and back are compiled for twice.Yellow River dyke is in danger situation in downward trend year by year, and along with building up of Standardization Dike, Yellow River dyke will be further enhanced safely.
2009, the safety to Lower Reaches of The Yellow River dyke such as Wang Zili was analyzed, and the safety proposing dyke relates to dyke itself, through-dyke building, river training works etc.There is " double suspended channel " in Lower Reaches of The Yellow River, and dyke mostly is sand soil formation, mostly do not snuggle up to water again at ordinary times, the hidden danger that levee body, levee foundation exist is difficult to appear, once flood overbank goes out groove, the dangerous situations such as infiltration, avalanche may be caused, Seawall safety will be constituted a serious threat, and be necessary to strengthen embankment safety monitoring early warning work.For dyke defect detecting and safety monitoring, the infiltration monitoring of through-dyke building soil stone joint portion, river training works root stone detection and the Problems existing such as monitoring, Seawall safety assessment, propose the thinking of solution.
2010, Lian Huiyao etc. by inquiry, analyze the overview of current Lower Reaches of The Yellow River dyke danger point hidden danger, propose based on dyke strengthening by warping reinforcing, cut-off wall is adopted when carrying on the back within the scope of the 100m of side, river and having village, adopting the methods such as pressure grouting to remove a hidden danger to the local hidden danger of dispersion, is the most effective measures ensureing that the Yellow River do not burst.
In existing Research Literature, these domestic to Yellow River dyke hidden danger and the relevant technical development of reinforcement and put into practice accumulate, be all that the continuation further investigation of the new reinforcement technology of dyke is inscribed and established solid foundation.Current China is comparatively deep to the distribution, type, reason etc. of Yellow River dyke hidden dangers in project research, and to the technique study of Yellow River dyke reinforcement, still great majority concentrate on and how to detect, investigate, in construction method.Technical at concrete Strengthening Project, also concentrated cut-off wall, front and back are clashed the aspect such as engineering, Standardization Dike construction, and have mainly been placed in the stabilization works process after flood.
One of existing technical scheme dyke strengthening by warping, the advantage of dyke strengthening by warping reinforcing technique to help the section of wide dyke building, extends seepage paths length, make its good seepage-proof property, and stability is strong, being conducive to antidetonation, being also convenient to later flood-fighting, racing against time for speedily carrying out rescue work.By long-term dyke strengthening by warping, can reduce silt in riverbed, widen and increase dyke building, Lower Reaches of The Yellow River be become and relatively goes to river, this is the Strategic Measure of Lower Reaches of The Yellow River flood control.From 20 century 70s, the Yellow River just comes into effect dyke strengthening by warping engineering, have accumulated abundant construction and managerial experiences.Warp working procedure simple, efficiency is high, not the impact of climate condition, can work continuously.The shortcoming that dyke strengthening by warping is reinforced is: dyke building silt district occupies cultivated land with fetching earth, and silt district fetches earth and mostly is sandy soil, if deal carefully with not in time, very easily produces desertification, causes the environment of Yu Zhu district and surrounding area to worsen, makes troubles to local masses' productive life.Silt district construction water amount is large, and construction water needs discharge outlet, if dealt with improperly, may cause surrounding area Pedotransfer function.
Two of existing technical scheme organizes big machinery to speedily carry out rescue work, according to the situation of Lower Reaches of The Yellow River dyke incidental various great dangerous situation under high water level effect, the big machineries such as bulldozer, loader, excavator, dump truck, scraper should be selected to carry out the earth and rock works of high strength.Adopt machinery shipment to jettisoning, greatly can accelerate the speed of speedily carrying out rescue work, alleviate the labour intensity of emergency personnel, control dangerous situation rapidly.According to statistics, speedily carry out rescue work and Traditional Man Method compare with artificial and mechanical fit system, can improve and speedily carry out rescue work efficiency 6-7 doubly, reduce investment outlay 76%.When people and machinery cooperation rescue and protect great dangerous situation, command scheduling department should take into full account various complex situations, reasonable Arrangement place, and personnel and mechanical arrangement carry out optimum organization.The artificial task such as transport, weaving packeted soil, bundle throwing willow pillow being responsible for willow material.Plant equipment be used for adding repair before in an opposite direction, in an opposite direction afterwards, transport earth and stone material, the work such as block stone of jettisoninging, galvanized wire cage and earth bag.On personnel and mechanical fiting skill, prioritizing selection people rob car stop, car rob people stop and wheel rob schemes such as having holidays by turns.
For river levee or earth and rockfill dam dam slope flood season occur destroying, crack and to leak etc. dangerous situation time, existing reinforcement scheme mainly puts what dyke strengthening and big machinery is speedily carried out rescue work, and its major defect is as follows:
1. put what dyke strengthening and mainly carry out construction at non-flood period, for the dangerous situation occurred during Flood, effectively can not control, the process that blocks water cannot be carried out in time, the wedge effect of water can not be reduced, dangerous situation can not be avoided to worsen further.
2. for the dangerous situation that dyke building occurred in flood season, the requirement of Rapid Implementation and handled easily can not be met, can not reach and dangerous situation is controlled as early as possible, for reinforcement gains time, implement the objects such as the follow-up remedial measure of reinforcement as early as possible.
3. the weaving packeted soil used when speedily carrying out rescue work, bundle are thrown the materials such as willow pillow and can not be reused, and block-water effect is limited, a dead lift is speedily carried out rescue work material, wastes time and energy, poor effect.
4., under lacking the condition of power in the wild, checkout equipment cannot steady operation, uses also more complicated, remarkable convenience.
In sum, due in river flood season, under Flood disturbance, be difficult to construction on the one hand, lack ripe equipment and technology barrier on the other hand, can not in water fast and safely carry out operation of speedily carrying out rescue work accordingly, cause dangerous situation effectively not contain.
Summary of the invention
The technical problem to be solved in the present invention is, in river flood season, construction is difficult on the one hand under Flood disturbance, lack ripe equipment and technology barrier on the other hand, can not in water fast and safely carry out operation of speedily carrying out rescue work accordingly, for solving the problem, provide a kind of dyke reinforcement assembled moving cofferdam.
The object of the invention is to realize in the following manner:
Dyke reinforcement assembled moving cofferdam, it comprises two columns, two relative sides of column are all provided with groove, the two ends of mutual button flat board are arranged in the groove I of two columns respectively, the lower end of two columns is all provided with oblique rail, the other end of two oblique rails is connected by fixed axis, column and the angle tiltedly between rail are acute angle, groove II is provided with on the upside of oblique rail, the lower end of mutual button side plate is arranged in groove II, the both sides, two ends up and down of mutual button flat board are provided with stiffening piece I, and the both sides, upper end of button side plate are provided with stiffening piece II mutually.
Described stiffening piece I two ends are flexibly connected with two columns respectively; One end of described stiffening piece II is flexibly connected with column, and the other end is flexibly connected with oblique rail.
Described column lower end arranges groove III, is provided with draw-in groove stator in groove III, and the central axis two ends of waterproof film volume are arranged in two draw-in groove stators, and the both sides of waterproof film are embedded in the groove IV of oblique rail medial surface.
Described waterproof film front end is provided with prerotation vane, prerotation vane is provided with at least one drag rope.
Described fixed axis is provided with at least one retainer ring, in retainer ring, spud pile is installed.
Described mutual button is dull and stereotyped is all by being boss by one end with detaining side plate mutually, and the other end is that the flat plate splicing of groove V forms, and boss is identical with the length of groove V, and the both sides of groove V are provided with rubber fastening band.
Described waterproof film is geomembrane.
Described column and oblique rail junction are provided with gusset plate.
Relative to prior art, the present invention when Flood generation dangerous situation, carries out the process that blocks water in time, can avoid the further deterioration of dangerous situation, and the present invention can be fabricated structure, not only convenient disassembly, and can reuse, time saving and energy saving.
Accompanying drawing explanation
Fig. 1 is front view of the present invention.
Fig. 2 is top view of the present invention.
Fig. 3 is lateral view of the present invention.
Fig. 4 is stereogram of the present invention.
Fig. 5 is that the present invention detains side plate combination schematic diagram mutually.
Fig. 6 is that the present invention detains flat sheet combination schematic diagram mutually.
Fig. 7 is that geomembrane volume combines schematic diagram with draw-in groove stator.
Wherein, 1 is column; 2 is oblique rails; 3 is stiffening pieces; 4 is detain side plate mutually; 5 is detain flat board mutually; 6 is spud piles; 7 is gusset plates; 8 is fixed axis; 9 is geomembranes; 10 is prerotation vanes; 11 is drag ropes; 12 is central axiss; 13 is draw-in groove stators; 14 is boss; 15 is rubber fastening bands.
Detailed description of the invention
As shown in Fig. 1-Fig. 7, dyke reinforcement assembled moving cofferdam of the present invention, it comprises two columns 1, two columns 1 are all provided with groove I in side relatively, the two ends of mutual button dull and stereotyped 5 are arranged in the groove I of two columns 1 respectively, the lower end of two columns 1 is all provided with oblique rail 2, the other end of two oblique rails 2 is connected by fixed axis 8, column 1 and the angle tiltedly between rail 2 are acute angle, groove II is provided with on the upside of oblique rail 2, the lower end of mutual button side plate 4 is arranged in groove II, the both sides, two ends up and down of mutual button dull and stereotyped 5 are provided with stiffening piece I, the both sides, upper end of mutual button side plate 4 are provided with stiffening piece II, stiffening piece 3 is used to increase the rigidity in cofferdam.Define top, bottom-open, the combined type cofferdam of face side face closure, this cofferdam carries out setting up assembling at levee slope dangerous situation place, and form an enclosure space blocked water rapidly, when ensure that dyke dangerous situation area in slope be larger near water, the prolongation in Parallel to the flow direction cofferdam can be realized, can cover and surround position and the area of dangerous situation, thus avoid current to sustaining breakdown such as the washing away of dangerous situation, seepages.
Stiffening piece I two ends are flexibly connected with two columns 1 respectively; One end of described stiffening piece II is flexibly connected with column 1, and the other end is flexibly connected with oblique rail 2.
Column 1 lower end arranges groove III, is provided with draw-in groove stator 13 in groove III, and central axis 12 two ends of waterproof film volume are arranged in two draw-in groove stators 13, and the both sides of waterproof film are embedded in the groove IV of oblique rail 2 medial surface.After cofferdam is combined to form, dynamic water with river flood is formed effective isolation, thus form hydrostatic in cofferdam after, by pulling traction rope rope 11, rope 11 is fixed on the prerotation vane 10 foremost of geomembrane 9, upwards carry out traction to pull, geomembrane 9 can be moved along domatic, and the both sides of geomembrane are embedded in the groove of oblique rail 2, when geomembrane upwards pulls out the water surface, and when arriving fixed axis 8 place, drag rope is fixed on spud pile 6.Central axis and geomembrane can install or remove according to the concrete needs of dangerous situation.
Waterproof film front end is provided with prerotation vane 10, prerotation vane 10 is provided with at least one drag rope 11, drag rope 11 be the cable wire of anti-corrosion.
Fixed axis 8 is provided with at least one retainer ring, spud pile 6 is installed in retainer ring.Cofferdam spud pile 6 is fixed on levee slope, prevents it from sliding or moves.
Mutual button dull and stereotyped 5 is all be boss 14 by one end with detaining side plate 4 mutually, and the other end is that the flat plate splicing of groove V forms, and boss 14 is identical with the length of groove V, and the both sides of groove V are provided with rubber fastening band 15.
Waterproof film is geomembrane.
Column 1 and oblique rail 2 junction are provided with gusset plate 7.
Beneficial effect of the present invention: 1. for the dangerous situation occurred during Flood, can effectively control, and enough carries out the process that blocks water in time, and the effective wedge effect reducing water, can avoid dangerous situation to worsen further.
2., for the dangerous situation of dyke appearance in flood season, the requirement of Rapid Implementation and handled easily can be met, reach and dangerous situation is controlled as early as possible, for reinforcement gains time, thus reach the objects such as the follow-up remedial measure implementing reinforcement as early as possible.
3. for all assembled moving cofferdam, all composition components all can reuse, and block-water effect is better, and convenient disassembly, time saving and energy saving simultaneously, and transport and move fast, effect is better.
4. under lacking the condition of power in the wild, all composition components, comprise column 1, tiltedly rail 2, flat board 5, side plate 4 etc., all constituent materials, steel or prefabricated reinforced concrete can be selected, can dismounting flexibly, after the dangerous situation of dyke somewhere or earth and rockfill dam processes, dismantle, convenient to collect and transhipment, then arrive other engineering or dyke when there is dangerous situation, be transported to corresponding place again, carry out Assembling just can reuse, assembled moving cofferdam can steady operation, uses also fairly simple convenience.
Claims (8)
1. dyke reinforcement assembled moving cofferdam, it is characterized in that: it comprises two columns, two relative sides of column are all provided with groove, the two ends of mutual button flat board are arranged in the groove I of two columns respectively, the lower end of two columns is all provided with oblique rail, the other end of two oblique rails is connected by fixed axis, column and the angle tiltedly between rail are acute angle, groove II is provided with on the upside of oblique rail, the lower end of mutual button side plate is arranged in groove II, the both sides, two ends up and down of mutual button flat board are provided with stiffening piece I, and the both sides, upper end of button side plate are provided with stiffening piece II mutually.
2. dyke reinforcement assembled moving cofferdam according to claim 1, is characterized in that: described stiffening piece I two ends are flexibly connected with two columns respectively; One end of described stiffening piece II is flexibly connected with column, and the other end is flexibly connected with oblique rail.
3. dyke reinforcement assembled moving cofferdam according to claim 1, it is characterized in that: described column lower end arranges groove III, draw-in groove stator is installed in groove III, the central axis two ends of waterproof film volume are arranged in two draw-in groove stators, and the both sides of waterproof film are embedded in the groove IV of oblique rail medial surface.
4. dyke reinforcement assembled moving cofferdam according to claim 3, is characterized in that: described waterproof film front end is provided with prerotation vane, prerotation vane is provided with at least one drag rope.
5. dyke reinforcement assembled moving cofferdam according to claim 1, is characterized in that: described fixed axis is provided with at least one retainer ring, is provided with spud pile in retainer ring.
6. dyke reinforcement assembled moving cofferdam according to claim 1, it is characterized in that: described mutual button is dull and stereotyped is all by being boss by one end with detaining side plate mutually, the other end is that the flat plate splicing of groove V forms, boss is identical with the length of groove V, and the both sides of groove V are provided with rubber fastening band.
7. dyke reinforcement assembled moving cofferdam according to claim 3, is characterized in that: described waterproof film is geomembrane.
8. dyke reinforcement assembled moving cofferdam according to claim 1, is characterized in that: described column and oblique rail junction are provided with gusset plate.
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| CN201410626963.2A CN104372803B (en) | 2014-11-10 | 2014-11-10 | Dyke reinforcement assembled moving cofferdam |
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| CN201410626963.2A CN104372803B (en) | 2014-11-10 | 2014-11-10 | Dyke reinforcement assembled moving cofferdam |
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| CN104372803B CN104372803B (en) | 2016-01-27 |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106193074A (en) * | 2016-07-14 | 2016-12-07 | 长江勘测规划设计研究有限责任公司 | The steel cofferdam repaired for channel |
| CN106337424A (en) * | 2016-10-20 | 2017-01-18 | 长江勘测规划设计研究有限责任公司 | Cofferdam semi-enclosed type foundation pit without interrupting water conveying during canal lining restoration and method |
| CN106381843A (en) * | 2016-10-20 | 2017-02-08 | 长江勘测规划设计研究有限责任公司 | Canal lining fastland repair foundation pit drainage structure and method without interruption of water transfer |
| CN106381842A (en) * | 2016-10-20 | 2017-02-08 | 长江勘测规划设计研究有限责任公司 | Canal lining repair buried pipe water transfer and cofferdam intercepted foundation pit and method |
| CN106400746A (en) * | 2016-10-20 | 2017-02-15 | 长江勘测规划设计研究有限责任公司 | Water delivery of by-pass pipe and cofferdaming truncation-typed foundation trench and method for canal lining repairing |
| CN106545022A (en) * | 2016-10-20 | 2017-03-29 | 长江勘测规划设计研究有限责任公司 | Cofferdam island foundation pit structure and method under the conditions of water delivery is not interrupted in canal lining reparation |
| CN109083173A (en) * | 2018-09-29 | 2018-12-25 | 华北水利水电大学 | The upright mobile cofferdam of counter weight type lightweight |
| CN111456050A (en) * | 2020-04-24 | 2020-07-28 | 李楠 | Sluice danger-removing and reinforcing combined cofferdam |
| CN112267429A (en) * | 2020-10-16 | 2021-01-26 | 湖南工程学院 | Construction method for plugging and repairing breach of dam body of bank |
| CN112359855A (en) * | 2020-11-03 | 2021-02-12 | 福建江隆水利水电工程有限公司 | Cofferdam for hydraulic engineering and construction method thereof |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106193074A (en) * | 2016-07-14 | 2016-12-07 | 长江勘测规划设计研究有限责任公司 | The steel cofferdam repaired for channel |
| CN106337424B (en) * | 2016-10-20 | 2018-06-15 | 长江勘测规划设计研究有限责任公司 | Cofferdam semi-wrapped style foundation pit and method under the conditions of water delivery are not interrupted in canal lining reparation |
| CN106381843B (en) * | 2016-10-20 | 2018-10-19 | 长江勘测规划设计研究有限责任公司 | One kind not interrupting canal lining under water delivery and repairs drainage of foundation pit structure and construction method dryly |
| CN106381842A (en) * | 2016-10-20 | 2017-02-08 | 长江勘测规划设计研究有限责任公司 | Canal lining repair buried pipe water transfer and cofferdam intercepted foundation pit and method |
| CN106400746A (en) * | 2016-10-20 | 2017-02-15 | 长江勘测规划设计研究有限责任公司 | Water delivery of by-pass pipe and cofferdaming truncation-typed foundation trench and method for canal lining repairing |
| CN106545022A (en) * | 2016-10-20 | 2017-03-29 | 长江勘测规划设计研究有限责任公司 | Cofferdam island foundation pit structure and method under the conditions of water delivery is not interrupted in canal lining reparation |
| CN106337424A (en) * | 2016-10-20 | 2017-01-18 | 长江勘测规划设计研究有限责任公司 | Cofferdam semi-enclosed type foundation pit without interrupting water conveying during canal lining restoration and method |
| CN106545022B (en) * | 2016-10-20 | 2018-09-14 | 长江勘测规划设计研究有限责任公司 | Cofferdam island foundation pit structure and construction method under the conditions of water delivery are not interrupted in canal lining reparation |
| CN106381843A (en) * | 2016-10-20 | 2017-02-08 | 长江勘测规划设计研究有限责任公司 | Canal lining fastland repair foundation pit drainage structure and method without interruption of water transfer |
| CN106400746B (en) * | 2016-10-20 | 2018-10-19 | 长江勘测规划设计研究有限责任公司 | Canal lining repairs bypass pipe water delivery and cofferdam clean cut system foundation pit and construction method |
| CN106381842B (en) * | 2016-10-20 | 2019-10-08 | 长江勘测规划设计研究有限责任公司 | Canal lining repairs pipe laying water delivery and cofferdam clean cut system foundation pit and construction method |
| CN109083173A (en) * | 2018-09-29 | 2018-12-25 | 华北水利水电大学 | The upright mobile cofferdam of counter weight type lightweight |
| CN111456050A (en) * | 2020-04-24 | 2020-07-28 | 李楠 | Sluice danger-removing and reinforcing combined cofferdam |
| CN112267429A (en) * | 2020-10-16 | 2021-01-26 | 湖南工程学院 | Construction method for plugging and repairing breach of dam body of bank |
| CN112359855A (en) * | 2020-11-03 | 2021-02-12 | 福建江隆水利水电工程有限公司 | Cofferdam for hydraulic engineering and construction method thereof |
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| CN104372803B (en) | 2016-01-27 |
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