CN115977124A - Automatic dismantlement formula underwater supporting device based on hydrodynamic force - Google Patents
Automatic dismantlement formula underwater supporting device based on hydrodynamic force Download PDFInfo
- Publication number
- CN115977124A CN115977124A CN202310050022.8A CN202310050022A CN115977124A CN 115977124 A CN115977124 A CN 115977124A CN 202310050022 A CN202310050022 A CN 202310050022A CN 115977124 A CN115977124 A CN 115977124A
- Authority
- CN
- China
- Prior art keywords
- wall body
- supporting device
- outer side
- water
- shaped
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Landscapes
- Revetment (AREA)
- Barrages (AREA)
Abstract
The invention discloses an automatic detachable underwater supporting device based on hydrodynamic force, wherein an adhesive coating is coated on the wall surface on the outer side of a wall body, a steel plate is arranged on the outer side of the adhesive coating, a supporting device is arranged on the outer side of the steel plate, the supporting device is fixed on an anti-seepage cover on the outer side of the wall body and is abutted against the steel plate during construction on the outer side of the wall body, and the supporting device is automatically separated when the outer side of the wall body is finished and water is stored. The invention can carry out the construction work of the outer side of the wall body under the condition that the inner side of the wall body is close to water, keeps the water demand requirement of the inner side of the wall body during the construction period, considers the normal operation of the inner side of the wall body and the safety of the construction of the outer side of the wall body, and can automatically remove the supporting device after the construction of the outer side of the wall body is finished and water is stored, so that the construction result of the outer side of the wall body can be put into use earlier.
Description
Technical Field
The invention relates to the technical field of energy conservation, environmental protection and hydraulic engineering, in particular to an automatic detachable underwater supporting device based on hydrodynamic force.
Background
The underwater wall body is a common structure in a water conservancy building, when the periphery of the wall body is constructed, in order to ensure the normal operation of the original water conservancy project, the inner side of the wall body is close to water, and the outer side of the wall body is vacant, and when the outer side of the wall body is constructed, the pressure on two sides of the wall body is unbalanced, so that potential safety hazards exist.
For example, when the hydroelectric power is required to be increased, in order to reduce the amount of topographic and geomorphic exploration and construction, a newly-built water diversion channel is excavated in parallel with the old water diversion channel, and one wall of the old channel is used as a common wall of the new channel and the old channel, so that the construction method is efficient and rapid. However, when a new channel is excavated, the common wall body has no water pressure towards one side of the new channel, so that in order to avoid potential safety hazards caused by pressure imbalance on two sides of the common wall body, the old channel needs to be stopped, power generation is interrupted, and economic benefits are influenced. If the old channel is not stopped, when the power generation is carried out in full water, the common wall body needs to be supported on one side facing the new channel, the common supporting device has the defects of uneven supporting load on the wall body, large dismounting and mounting engineering quantity and the like, and the progress of putting the new channel into use is influenced by manually dismounting the supporting device.
For another example, the original power station head junction is composed of two-hole flood discharge sand sluicing gate, one-hole water inlet gate and right bank gravel dam. In actual operation, when the two-hole flood discharge sand sluicing gate is fully opened and still cannot meet the lower flood discharge flow, the residual flood flow is released in a self-bursting mode of the gravel dam on the right bank. In a power station hub on a sediment-laden river, due to the fact that the amount of sediment in the river is large, the sediment is serious in front of a gravel dam on the right bank, dam break and discharge are difficult, and potential safety hazards are brought to engineering operation. The head gate and the opening and closing device of the channel of the previous stage power station in the cascade power station are radial gates and matched with a winch type opening and closing machine, the speed of lifting the gate is high, and the head gate and the opening and closing device of the channel of the current stage power station are flat gates and matched with a screw type opening and closing machine, so that the lifting speed is low. When flood or abnormal water drainage caused by equipment accidents of a previous stage of power station occurs, the head water level of the head of the power station cannot be adjusted in time due to serious insufficient discharge capacity, and the front water level of the gate rises steeply, so that great potential safety hazards exist. Therefore, a new flood discharge sand sluice needs to be built beside the old flood discharge sand sluice at the head junction of the power station canal, and the working conditions of the inside of the wall body running near water and the outside construction of the wall body can also appear.
Disclosure of Invention
The invention aims to solve the technical problem of providing an automatic detachable underwater support device based on hydrodynamic force, which can perform construction work on the outer side of a wall body under the condition that the inner side of the wall body is close to water, maintain the water demand requirement on the inner side of the wall body during construction, take the safety of normal operation of the inner side of the wall body and construction on the outer side of the wall body into consideration, and can automatically detach the support device after the construction on the outer side of the wall body is completed and water is stored, so that the construction result on the outer side of the wall body can be put into use earlier.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows: the utility model provides an automatic dismantlement formula is supporting device under water based on hydrodynamic force, includes the wall body, and coating on the wall body outside wall face has binded the coating, and the outside of binding the coating sets up the steel sheet, and the outside of steel sheet sets up supporting device, and supporting device fixes prevention of seepage shop and butt in the wall body outside when the construction of the wall body outside the steel sheet, supporting device breaks away from automatically when the completion of the wall body outside and retaining.
As a preferred technical scheme of the invention, n-shaped steel hoops are arranged on the top of the wall body and the top of the steel plate, and the steel plate is clamped on the wall body by the n-shaped steel hoops.
According to a preferable technical scheme, the supporting device is a right-angled triangle structure formed by enclosing three strip-shaped I-shaped steels, two right-angled sides of the supporting device are respectively fixed on an anti-seepage cover and a steel plate on the outer side of a wall body through a fixing device, the fixing device is a U-shaped buckle, the U-shaped buckle is provided with a pin hole and a pin, and the two right-angled sides of the supporting device are locked in the U-shaped buckle through the pin.
As a preferable technical scheme of the invention, the top end of the pin is provided with a buoyancy ball or a pull ring, the buoyancy ball or the pull ring is connected with a pull rope, at least 1 direction changing mechanism is arranged on the bevel edge of the supporting device, a traction mechanism is arranged on the n-shaped steel hoop, the pull rope is connected to the traction mechanism after bypassing the direction changing mechanism, and at least 1 floater is arranged on the pull rope.
As a preferred technical scheme of the invention, an included angle between a pull rope between the buoyancy ball or pull ring and the direction changing mechanism and a central axis of the pin after being tensioned is less than or equal to 45 degrees;
as a preferred technical scheme of the invention, the direction changing mechanism comprises an L-shaped rod and a rotary drum sleeved on the L-shaped rod;
as a preferred technical scheme of the invention, the direction changing mechanism is a fixed pulley;
as a preferred technical scheme of the invention, the direction changing mechanism is a circular ring.
As a preferred technical scheme of the invention, anchor posts are uniformly distributed on one side of the steel plate facing the adhesive coating, and the anchor posts are inserted into the adhesive coating.
As a preferable technical scheme of the invention, the adhesive coating is a cement coating, and the thickness of the adhesive coating is more than or equal to the length of the anchor post.
As a preferable technical scheme of the invention, the opening of the U-shaped buckle 62 faces the downstream direction of the water flow
As a preferred technical solution of the present invention, the number of the supporting devices corresponding to the wall body is as follows
Wherein n is the number of supporting devices, L Wall body Is the length of the wall, gamma Water (W) Is the volume weight of water, G Wall body Is the dead weight of the wall, delta Wall body Is the thickness of the wall, H Water (W) Depth of water inside the wall, F Branch stand The maximum supporting force which can be borne by a single supporting device.
Adopt the produced beneficial effect of above-mentioned technical scheme to lie in: the invention can carry out construction work on the outer side of the wall body under the condition that the inner side of the wall body is close to water, keeps the water demand requirement on the inner side of the wall body during construction, gives consideration to normal operation on the inner side of the wall body and the safety of construction on the outer side of the wall body, and can automatically remove the supporting device after the construction on the outer side of the wall body is finished and water is stored, so that the construction result on the outer side of the wall body can be put into use earlier.
The adhesive coating, the wall body and the steel plate have higher combination degree, so that the point load of the supporting device is changed into uniform load; the fixer easy dismounting can greatly accelerate the construction progress, especially can demolish automatically with the help of rivers and buoyancy, has saved manpower and materials.
Traction mechanism and stay cord can demolish the pin under the circumstances of pin inadequately at buoyancy, and the manual work is demolishd the pin, and the guarantee supporting device can both all be demolishd, avoids blockking of rivers.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a schematic diagram of the present invention.
Figure 2 is an enlarged view of a portion of the support device of the present invention.
In the figure: 1. the anti-seepage wall comprises a wall body 2, a binding coating 3, a steel plate 4, a supporting device 5, an n-shaped steel hoop 6, a fixer 7, a wall body inner side 8, a wall body outer side 9, a traction mechanism 10, an anti-seepage cover 61, a right-angle side 62, a U-shaped buckle 63, a pin 64, a buoyancy ball 65, a pull ring 66, a pull rope 67, a turning mechanism 68, a bevel edge 69 and a floater.
Detailed Description
The structure of one embodiment of the invention comprises a wall body 1, an adhesive coating 2 is coated on the wall surface of the outer side 8 of the wall body, a steel plate 3 is arranged on the outer side of the adhesive coating 2, a supporting device 4 is arranged on the outer side of the steel plate 3, the supporting device 4 is fixed on an anti-seepage paving cover of the outer side 8 of the wall body and is abutted against the steel plate 3 when the outer side 8 of the wall body is constructed, and the supporting device 4 is automatically separated when the outer side 8 of the wall body is finished and water is stored.
The top of the wall body 2 and the steel plate 3 is provided with an n-shaped steel hoop 5, and the steel plate 3 is clamped on the wall body 1 by the n-shaped steel hoop 5.
The supporting device 4 is a right-angled triangle structure formed by enclosing three strip-shaped I-shaped steels, two right-angled sides 61 of the supporting device 4 are respectively fixed on the anti-seepage paving cover on the outer side 8 of the wall body and the steel plate 3 through the fixing devices 6, the fixing devices 6 are U-shaped buckles 62, the U-shaped buckles 62 are provided with pin holes and pins 63, and the two right-angled sides 61 of the supporting device 4 are locked in the U-shaped buckles 62 through the pins 63.
The top end of the pin 63 is provided with a buoyancy ball 64 or a pull ring 65, the buoyancy ball 64 or the pull ring 65 is connected with a pull rope 66, at least 1 direction changing mechanism 67 is arranged on a bevel edge 68 of the supporting device 4, the n-shaped steel hoop 5 is provided with a traction mechanism 9, the pull rope 66 is connected to the traction mechanism 9 after bypassing the direction changing mechanism 67, and at least 1 floater 69 is arranged on the pull rope 66. The float 69 can serve both to assist in pulling the pin 63 and to mark whether the pin 63 is being effectively pulled out.
The included angle between the buoyancy ball 64 or the pull ring 65 and the pull rope 66 between the direction changing mechanism and the central axis of the pin 63 after being tensioned is less than or equal to 45 degrees; through the design of deviator 67, avoid stay cord 66 and the too big contained angle of pin 63, pin 63 can be pulled out more smoothly.
The direction changing mechanism 67 includes an L-shaped lever and a drum fitted over the L-shaped lever.
And anchor posts are uniformly distributed on one side, facing the adhesive coating 2, of the steel plate 3 and are inserted into the adhesive coating 2.
The adhesive coating 2 is a cement coating, and the thickness of the adhesive coating 2 is greater than or equal to the length of the anchor column.
When the water levels on the two sides of the wall body 1 are self-balanced, the pin 63 is disengaged from the U-shaped buckle 62 due to buoyancy, and the supporting device 4 is disengaged from the U-shaped buckle 62 under the action of the driving force of water flow, so that the dismantling work is completed.
The number of the supporting devices corresponding to the wall body is
Where n is the number of retaining devices 4, L Wall body Is the length, gamma, of the wall 1 Water (W) Is the volume weight of water, G Wall body Is the self-weight of the wall 1, delta Wall body Is the thickness of the wall body 1, H Water (W) Is the depth of water, F, inside the wall 1 Branch stand The maximum supporting force that a single supporting device 4 can withstand.
In other embodiments, the U-shaped clip 62 engages a bolt that secures the support device 4, and the bolt terminates in an impeller that is capable of rotating under the impact of water flow to dislodge the bolt.
When the device is used, the construction work of the outer side 8 of the wall body can be carried out under the condition that the inner side 7 of the wall body is close to water, the water demand requirement of the inner side 7 of the wall body during construction is kept, the normal operation of the inner side 7 of the wall body and the construction safety of the outer side 8 of the wall body are both considered, the supporting device 4 can be automatically removed after the construction of the outer side 8 of the wall body is completed and water is stored, and the construction result of the outer side 8 of the wall body can be put into use earlier.
After the water is stored in the wall body outer side 8, the water pressure of the wall body inner side 7 and the water pressure of the wall body outer side 8 are balanced, the supporting device 4 is not under the pressure of the wall body 1, and no friction force exists between the pin 63 and the U-shaped buckle 62, so that the pin can be taken out smoothly.
The adhesive coating 2, the wall body 1 and the steel plate 3 have higher combination degree, so that the point load of the supporting device 4 is changed into uniform load; 6 easy dismounting of fixer can greatly accelerate the construction progress, especially can demolish with the help of rivers and buoyancy, has saved manpower and materials.
The above description is only presented as an enabling solution for the present invention and should not be taken as a sole limitation on the solution itself.
Claims (8)
1. The utility model provides an automatic dismantlement formula is supporting device under water based on hydrodynamic force, includes the wall body, its characterized in that: the coating that binds is scribbled to wall body outside wall, and the outside of binding the coating sets up the steel sheet, and the outside of steel sheet sets up supporting device, and supporting device fixes the prevention of seepage shop in the wall body outside and butt when the construction of the wall body outside the steel sheet, supporting device automatic separation when the completion of the wall body outside and retaining.
2. The hydrodynamically based automatically detachable underwater support device as claimed in claim 1, wherein: and n-shaped steel hoops are arranged at the tops of the wall body and the steel plates, and the steel plates are clamped on the wall body by the n-shaped steel hoops.
3. The hydrodynamically based automatically detachable underwater support device as claimed in claim 2, wherein: the supporting device is a right-angled triangle structure formed by enclosing three strip-shaped I-shaped steels, two right-angle sides of the supporting device are fixed on an anti-seepage paving cover and a steel plate on the outer side of a wall body respectively through fixing devices, each fixing device is a U-shaped buckle, each U-shaped buckle is provided with a pin hole and a pin, and the two right-angle sides of the supporting device are locked in the corresponding U-shaped buckle through the pins.
4. The hydrodynamically based automatically detachable underwater support device as claimed in claim 3, wherein: the top end of the pin is provided with a buoyancy ball or a pull ring, the buoyancy ball or the pull ring is connected with a pull rope, at least 1 steering mechanism is arranged on the bevel edge of the supporting device, a traction mechanism is arranged on the n-shaped steel hoop, the pull rope is connected to the traction mechanism after bypassing the steering mechanism, and at least 1 floater is arranged on the pull rope.
5. The hydrodynamically based automatically detachable underwater support device as claimed in claim 4, wherein: the included angle between the pulling rope between the buoyancy ball or the pulling ring and the direction changing mechanism and the central axis of the pin after being tensioned is less than or equal to 45 degrees;
independently selectable, the direction changing mechanism comprises an L-shaped rod and a rotary drum sleeved on the L-shaped rod;
the direction changing mechanism is an independent and selectable fixed pulley;
independently optional, the deviator is the ring.
6. The hydrodynamically based automatically detachable underwater support device as claimed in claim 1, wherein: and anchor posts are uniformly distributed on one side of the steel plate facing the binding coating and inserted into the binding coating.
7. The hydrodynamically based automatically detachable underwater support device as claimed in claim 6, wherein: the adhesive coating is a cement coating, and the thickness of the adhesive coating is larger than or equal to the length of the anchor post.
8. The hydrodynamically based automatically detachable underwater support device as claimed in claim 1, wherein: the number of the supporting devices corresponding to the wall body is
Wherein n is the number of supporting devices, L Wall body Is the length of the wall, gamma Water (W) Is the volume weight of water, G Wall body Is a wallSelf weight of body, delta Wall body Is the thickness of the wall, H Water (W) Depth of water inside the wall, F Branch stand The maximum supporting force which can be borne by a single supporting device. />
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310050022.8A CN115977124B (en) | 2023-02-01 | 2023-02-01 | Automatic dismantlement formula is strutting arrangement under water based on hydrodynamic force |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310050022.8A CN115977124B (en) | 2023-02-01 | 2023-02-01 | Automatic dismantlement formula is strutting arrangement under water based on hydrodynamic force |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115977124A true CN115977124A (en) | 2023-04-18 |
| CN115977124B CN115977124B (en) | 2023-09-01 |
Family
ID=85970159
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310050022.8A Active CN115977124B (en) | 2023-02-01 | 2023-02-01 | Automatic dismantlement formula is strutting arrangement under water based on hydrodynamic force |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115977124B (en) |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000144677A (en) * | 1998-11-05 | 2000-05-26 | Taisei Corp | Temporary cofferdam construction method |
| KR101431623B1 (en) * | 2013-03-19 | 2014-08-21 | 주식회사 엔티에스건설 | Mehod for constructing underground wall in extension of undergound parking lot |
| CN105332382A (en) * | 2015-10-29 | 2016-02-17 | 成都华川公路建设集团有限公司 | River-adjacent-foundation-pit island-building cofferdam clay sealing construction method |
| CN207314265U (en) * | 2017-08-27 | 2018-05-04 | 孟宪坤 | A kind of river waterwall easy to remove |
| CN111424627A (en) * | 2020-05-18 | 2020-07-17 | 湖南省交通规划勘察设计院有限公司 | Ship lock extension supporting structure and ship lock extension method |
| CN112031070A (en) * | 2020-09-14 | 2020-12-04 | 浙江省水利水电勘测设计院 | Movable water inlet with head positioned by upright post and float bowl |
| CN112376593A (en) * | 2020-10-26 | 2021-02-19 | 上海市政工程设计研究总院（集团）有限公司 | Gravity type cofferdam and construction method |
| KR20210034370A (en) * | 2019-09-20 | 2021-03-30 | 삼성중공업 주식회사 | Berthing apparatus of quay wall |
| CN216948183U (en) * | 2021-06-09 | 2022-07-12 | 湖南省交通规划勘察设计院有限公司 | Construction supporting system for rebuilding and expanding lock chamber section of ship lock |
| CN217104898U (en) * | 2021-12-27 | 2022-08-02 | 安能三局(成都)工程质量检测有限公司 | Flood control wall for water conservancy |
| CN217710571U (en) * | 2022-06-07 | 2022-11-01 | 贵州省水利水电勘测设计研究院有限公司 | Mountain-climbing channel crossing gully structure |
| CN218204282U (en) * | 2022-08-31 | 2023-01-03 | 湖南省水运建设投资集团有限公司 | Construction supporting system for rebuilding navigation wall section of ship lock |
-
2023
- 2023-02-01 CN CN202310050022.8A patent/CN115977124B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000144677A (en) * | 1998-11-05 | 2000-05-26 | Taisei Corp | Temporary cofferdam construction method |
| KR101431623B1 (en) * | 2013-03-19 | 2014-08-21 | 주식회사 엔티에스건설 | Mehod for constructing underground wall in extension of undergound parking lot |
| CN105332382A (en) * | 2015-10-29 | 2016-02-17 | 成都华川公路建设集团有限公司 | River-adjacent-foundation-pit island-building cofferdam clay sealing construction method |
| CN207314265U (en) * | 2017-08-27 | 2018-05-04 | 孟宪坤 | A kind of river waterwall easy to remove |
| KR20210034370A (en) * | 2019-09-20 | 2021-03-30 | 삼성중공업 주식회사 | Berthing apparatus of quay wall |
| CN111424627A (en) * | 2020-05-18 | 2020-07-17 | 湖南省交通规划勘察设计院有限公司 | Ship lock extension supporting structure and ship lock extension method |
| CN112031070A (en) * | 2020-09-14 | 2020-12-04 | 浙江省水利水电勘测设计院 | Movable water inlet with head positioned by upright post and float bowl |
| CN112376593A (en) * | 2020-10-26 | 2021-02-19 | 上海市政工程设计研究总院（集团）有限公司 | Gravity type cofferdam and construction method |
| CN216948183U (en) * | 2021-06-09 | 2022-07-12 | 湖南省交通规划勘察设计院有限公司 | Construction supporting system for rebuilding and expanding lock chamber section of ship lock |
| CN217104898U (en) * | 2021-12-27 | 2022-08-02 | 安能三局(成都)工程质量检测有限公司 | Flood control wall for water conservancy |
| CN217710571U (en) * | 2022-06-07 | 2022-11-01 | 贵州省水利水电勘测设计研究院有限公司 | Mountain-climbing channel crossing gully structure |
| CN218204282U (en) * | 2022-08-31 | 2023-01-03 | 湖南省水运建设投资集团有限公司 | Construction supporting system for rebuilding navigation wall section of ship lock |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115977124B (en) | 2023-09-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204238170U (en) | A kind of open channel scouring on bedrock model test apparatus | |
| US4345159A (en) | Hydropowered bulkhead | |
| CN110616726A (en) | Water retaining cofferdam structure and construction process thereof | |
| CN208578092U (en) | Dredging device for water conservancy projects | |
| CN103526765A (en) | Self-floating steel cofferdam for underwater concrete plane construction | |
| CN115977124A (en) | Automatic dismantlement formula underwater supporting device based on hydrodynamic force | |
| CN110685291B (en) | Supporting device for concrete cofferdam in deepwater area and construction process of supporting device | |
| CN210658323U (en) | Assembled fixer for dyke emergency to resist large-tonnage horizontal force | |
| CN215977119U (en) | Damaged dry chamber cabin of concrete under water restores intelligent stagnant water and equips | |
| CN206052843U (en) | A kind of water taking device by buoyant raft | |
| CN210341824U (en) | Reinforced structure of energy dissipation anti-impact facility under gate | |
| CN212248298U (en) | Temporary water retaining structure capable of being rapidly detached for river channel hidden culvert | |
| CN207032178U (en) | A kind of lower shaft drives flap gate | |
| CN205954578U (en) | Stop log gate structure | |
| CN206784354U (en) | A kind of U-shaped casing seal installation | |
| CN215669338U (en) | Reel device for dam leak plugging | |
| CN220953281U (en) | Novel spillway chute bottom protection reinforcing structure | |
| JPS58158378A (en) | Power plant utilizing water current | |
| CN212000944U (en) | Submerged bottom type maintenance gate | |
| CN211872914U (en) | Hydropower station pivot stone blocking, water permeating and sand guiding device on multi-sand river flow | |
| CN220521259U (en) | Stilling pool structure | |
| CN219280641U (en) | Sluice structure | |
| CN217500275U (en) | Combined water stop system suitable for underwater dry environment operation equipment | |
| CN220847445U (en) | Dam body float-cleaning structure | |
| CN203594040U (en) | Self-floating-type steel cofferdam for underwater concrete plane construction |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |