CN111636491A - Cofferdam riverbed anti-scouring protection device and cofferdam riverbed protection method - Google Patents
Cofferdam riverbed anti-scouring protection device and cofferdam riverbed protection method Download PDFInfo
- Publication number
- CN111636491A CN111636491A CN202010560266.7A CN202010560266A CN111636491A CN 111636491 A CN111636491 A CN 111636491A CN 202010560266 A CN202010560266 A CN 202010560266A CN 111636491 A CN111636491 A CN 111636491A
- Authority
- CN
- China
- Prior art keywords
- cofferdam
- riverbed
- quicksand
- conveying pipe
- spiral
- 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.)
- Pending
Links
- 238000009991 scouring Methods 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 22
- 230000007246 mechanism Effects 0.000 claims abstract description 24
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 8
- 230000005540 biological transmission Effects 0.000 claims description 48
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 44
- 230000000087 stabilizing effect Effects 0.000 claims description 17
- 239000004576 sand Substances 0.000 claims description 8
- 230000001681 protective effect Effects 0.000 claims description 6
- 230000002829 reductive effect Effects 0.000 claims description 5
- 238000003780 insertion Methods 0.000 claims description 3
- 230000037431 insertion Effects 0.000 claims description 3
- 230000009467 reduction Effects 0.000 claims description 2
- 230000001012 protector Effects 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 17
- 238000002513 implantation Methods 0.000 abstract description 3
- 239000010410 layer Substances 0.000 description 10
- 230000008569 process Effects 0.000 description 10
- 238000005259 measurement Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 4
- 230000000670 limiting effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000003116 impacting effect Effects 0.000 description 3
- 239000013049 sediment Substances 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 239000011241 protective layer Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000005429 filling process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 238000012876 topography Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/06—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against corrosion by soil or water
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B13/00—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/0061—Production methods for working underwater
- E02D2250/0092—Production methods for working underwater using hydraulical means
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Civil Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Combustion & Propulsion (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Revetment (AREA)
Abstract
The invention belongs to the technical field of civil engineering construction equipment, in particular to a cofferdam riverbed anti-scouring protection device and a cofferdam riverbed protection method, wherein the cofferdam riverbed anti-scouring protection device comprises at least 1 protection unit arranged on the water-facing side of a cofferdam, and each protection unit comprises a conveying pipe, a spiral conveying mechanism and a self-driving unit; one end of the conveying pipe is provided with a quicksand inlet, the other end of the conveying pipe is provided with a quicksand outlet, the self-driving unit and the quicksand outlet of the conveying pipe are both arranged on the upstream face of the cofferdam, the self-driving unit is connected with the spiral conveying mechanism through a connecting bearing and drives the spiral conveying mechanism to transmit through the driving of the self-driving unit, and quicksand entering from the quicksand inlet is transmitted to the quicksand outlet to be output; the invention solves the problem of silt loss caused by river scouring near the cofferdam by a mode of conveying silt below the cofferdam back to the original place, thereby ensuring the stable and safe implantation of the cofferdam and the safety of subsequent construction.
Description
Technical Field
The invention relates to the technical field of civil engineering construction, in particular to a cofferdam riverbed anti-scouring protection device and a cofferdam riverbed protection method.
Background
The water area of the bridge site of the bridge has a rapid water depth, the riverbed surface is covered with a fine sand layer which is easy to scour, the part of silt is easy to scour under the action of water flow, and the part of silt is used as the underwater foundation of the main channel, and local scours with different degrees can be generated in the construction period of the cofferdam 1, particularly in the sinking process, if the scouring amplitude is large, the influence on the safe implantation of the cofferdam 1 is caused, and the threat on the stability of the foundation of the implanted cofferdam 1 can be formed; therefore, when the riverbed starts to be flushed in the sinking process of the cofferdam under different working conditions; the local scouring condition of the cofferdam under different drafts and different flow rates; the shape of riverbed scouring and the like have very important guiding significance for cofferdam positioning and implantation and subsequent construction safety.
In the process of sinking and landing the cofferdam, the large cofferdam sunk in water can block the smooth water flow, although the water flow on the upper layer can be shunted from two sides and then goes backwards after being blocked by the cofferdam, the water flow on the lower layer can impact the riverbed at the bottom of the cofferdam. Because the overflow between the cofferdam bottom and the riverbed can occur, the downward water flow impacting the rear edge wall of the cofferdam can cause the scouring of the bed surface at the bottom of the cofferdam. The great riverbed scouring can riverbed surface produce great difference in height for form great difference in height after the cofferdam is bedded, lead to the cofferdam off normal, produce very big construction hidden danger, influence the follow-up construction of cofferdam.
Based on the sinking and landing process of the existing cofferdam, the large cofferdam sinking in water can obstruct the smooth flow of water, although the upper layer water flow can be shunted from two sides and then goes backwards after being obstructed by the cofferdam, the lower layer water flow can impact the river bed at the bottom of the cofferdam. Because the overflow between the cofferdam bottom and the riverbed can occur, the downward water flow impacting the rear edge wall of the cofferdam can cause the scouring of the bed surface at the bottom of the cofferdam. The great riverbed scouring can riverbed surface produce great difference in height for form great difference in height after the cofferdam is bedded, lead to the cofferdam off normal, produce very big construction hidden danger, influence the technical problem of the follow-up construction of cofferdam.
Disclosure of Invention
In order to overcome the problems existing in the sinking and landing process of the conventional cofferdam, the invention provides an anti-scouring protection device for a cofferdam and a riverbed, which can convey the washed sediment below the cofferdam back to the original place and solve the problem of sediment loss caused by river scouring near the cofferdam.
Meanwhile, the invention also provides a cofferdam riverbed protection method realized by utilizing the cofferdam riverbed anti-scouring protection device.
The technical scheme adopted by the invention is as follows:
a cofferdam riverbed scour prevention protection device comprises at least 1 protection unit arranged on the water facing side of a cofferdam 1, wherein each protection unit comprises a conveying pipe 2, a spiral conveying mechanism and a self-driving unit; the one end of conveyer pipe 2 has been seted up the quicksand entry 3, and the quicksand export has been seted up to the other end, the quicksand export of self-driving unit and conveyer pipe 2 all sets up on the upstream face of cofferdam 1, and the self-driving unit is connected with screw conveyor through connecting bearing to drive screw conveyor transmission through the self-driving unit drive, will follow the quicksand that the quicksand entry 3 got into and transmit to the quicksand export output.
Further limiting, the conveying pipe 2 is an arc-shaped bent pipe, a quicksand inlet 3 of the conveying pipe 2 is formed in the side face of the cofferdam 1, and a quicksand outlet of the conveying pipe 2 is formed below the self-driving unit, so that quicksand impacted by water enters the conveying pipe 2 from the quicksand inlet 3 and flows out through the quicksand outlet to restore the position.
Further defined, the self-driven unit comprises a stabilizing bracket 6, a guard ring 61, a propeller 65, a propeller shaft 64, a transmission assembly; the stabilizing bracket 6 is fixedly connected with the conveying pipe 2; the protective ring 61 is arranged at the upper part of the stabilizing bracket 6, the propeller 65 is arranged on the outer surface of the propeller shaft 64 in the protective ring 61, and one end of the propeller shaft 64 is fixedly connected with the upper part of the stabilizing bracket 6 through a bearing; the propeller shaft 64 is connected to the screw conveyor by a transmission assembly.
Further defined, the transmission assembly includes a first pulley 56, a second pulley 66, and a conveyor belt; the second belt wheel 66 is fixedly connected with the other end of the propeller shaft 64; the first belt pulley 56 is arranged below the second belt pulley 66 and connected with the spiral conveying mechanism, and the first belt pulley 56 is connected with the second belt pulley 66 through a conveying belt.
Further, the outer surfaces of the first pulley 56 and the second pulley 66 are provided with grooves, and the conveyor belt is embedded in the grooves.
Further, the spiral conveying mechanism comprises a transmission shaft 54 and a spiral blade 55 arranged on the surface of the transmission shaft 54, both ends of the transmission shaft 54 are respectively connected with the end covers of the conveying pipes 2 through bearings, the first belt pulley 56 is arranged at one end of the transmission shaft 54 and is fixedly connected with the transmission shaft 54 and the first belt pulley 56, and the transmission shaft 54 is driven to rotate by the rotation of the first belt pulley 56.
Further, the inner surface of the conveying pipe 2 is provided with a spiral chute 67 matched with the spiral blade 55, so that the surface of the spiral blade 55 is in sliding insertion connection with the inner wall of the conveying pipe 2.
The cofferdam riverbed protection method realized by the cofferdam riverbed anti-scouring protection device comprises the following steps:
(1) installing the cofferdam riverbed anti-scouring protection device of claim 1 at the position of the highest water flow impact at the lower end of the cofferdam 1;
(2) the water flow impact cofferdam 1 uses the impact force of water flow as the power for the rotation of the self-driving unit;
(3) the self-driving unit rotates to drive the spiral conveying mechanism to carry out spiral transmission in the conveying pipe 2, suction is formed at the quicksand inlet 3 of the conveying pipe 2, silt flushed from the lower part of the cofferdam 1 is sucked into the conveying pipe 2, and the silt is conveyed to a quicksand outlet through the spiral conveying mechanism to be output and reduced to the lower part of the cofferdam 1.
Further limiting, the step (2) is specifically as follows: the water flow impacts the cofferdam 1, the impact force of the water flow drives the propeller 65 to rotate, the propeller 65 rotates and drives the second belt pulley 66 to rotate through the propeller shaft 64, the second belt pulley 66 is connected through the transmission of the conveyor belt and drives the first belt pulley 56 to rotate, and the self-driving of the self-driving unit is completed.
Further limiting, the step (3) is specifically: the first belt wheel 56 rotates to drive the transmission shaft 54 to rotate, the transmission shaft 54 rotates to drive the spiral blade 55 to rotate, a suction force is generated at the quicksand inlet 3, the suction force at the quicksand inlet 3 is combined with the inertia force of silt impact, so that the silt around the cofferdam 1 is sucked into the conveying pipe 2, the silt is driven by the spiral transmission of the spiral blade 55 to be conveyed to the other end of the conveying pipe 2 at one end of the conveying pipe 2, and is output through a quicksand outlet and reduced to the position below the cofferdam 1, and the stability of the riverbed of the cofferdam 1 is kept.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention is used for thinking of flow control, the impacted silt below the cofferdam 1 is sucked into the conveying pipe 2 through the suction force at the position of the quicksand inlet 3 of the conveying pipe 2 and the impact inertia force of the silt, and then the silt below the cofferdam 1 is conveyed back to the original place through the spiral conveying mechanism with the circular arc structure, thereby achieving the effects of supplement and balance, solving the problem of local scouring with different degrees generated in the construction period of the cofferdam 1, particularly in the sinking process, and solving the problem of silt loss caused by river scouring near the cofferdam 1, thereby ensuring the stable and safe landing of the cofferdam 1 and the safety of subsequent construction.
2. According to the invention, under the law of natural flow of water flow, the impact of the water flow is used as motive power to drive the propeller 65 to rotate, and then the power is transmitted to the transmission shaft 54 through the transmission assembly to drive the helical blades 55 to carry out helical transmission, so that the self-driving is realized without increasing the power driving, and the purposes of energy conservation, environmental protection and resource utilization are achieved.
Drawings
FIG. 1 is a view of a cofferdam 1 river bed scour scenario;
FIG. 2 is a schematic view of the installation of the anti-scour protection device for the cofferdam riverbed;
FIG. 3 is a structural sectional view of the delivery pipe 2 of FIG. 2;
FIG. 4 is an enlarged view of the structure at A in FIG. 3;
FIG. 5 is an enlarged view of the structure at B in FIG. 3;
FIG. 6 is a schematic structural diagram of a protection unit;
FIG. 7 is a schematic view of the connection structure of the transmission shaft 54 in FIG. 6;
FIG. 8 is a schematic structural diagram of the self-driving unit in FIG. 6;
fig. 9 is a top view of the self-driving unit of fig. 6.
In the figure: 1. cofferdam; 2. a delivery pipe; 3. a quicksand inlet; 4. a support leg; 5. a first bearing; 51. a semicircular end cover; 52. a connecting plate; 53. a second bearing; 54. a drive shaft; 55. a helical blade; 56. a first pulley; 6. a stabilizing bracket; 61. a guard ring; 62. a stabilizing rod; 63. a third bearing; 64. a propeller shaft; 65. a propeller; 66. a second pulley; 67. a spiral chute.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Usually, in the process of sinking the cofferdam 1 to a bed, the huge cofferdam 1 sinking in water can obstruct the water flow, the water flow on the upper layer is obstructed by the cofferdam 1 and then flows backwards after being divided from two sides, but the water flow on the lower layer can impact the river bed at the bottom of the cofferdam 1, the water flow between the bottom of the cofferdam 1 and the river bed can overflow, and the water flow which descends along the side wall after impacting the cofferdam 1 can cause the scouring of the bed surface at the bottom of the cofferdam 1, as shown in fig. 1.
In order to avoid hidden danger caused by water flow scouring on a cofferdam 1 riverbed, the cofferdam riverbed scour prevention protection device and the cofferdam riverbed protection method provided by the invention mainly utilize the thought of flow control, the impacted sediment under the cofferdam 1 is intercepted and then returns to the original position, specifically refer to fig. 2-9.
This protection unit includes conveyer pipe 2 and screw conveyor and from the drive unit, wherein, conveyer pipe 2 is that common stainless steel pipe makes the arc tubulose, end at conveyer pipe 2 is provided with semicircle end cover 51, conveyer pipe 2 passes through landing leg 4 to be fixed on the riverbed, quicksand entry 3 has been seted up to conveyer pipe 2 one end, the quicksand export has been seted up to the other end, in order to guarantee the interception effect of silt, quicksand entry 3 is seted up towards the upstream face, the setting is in the side of cofferdam 1, and for the ease of silt discharges, quicksand outlet opening is downward, the setting is just with cofferdam 1 fixed connection at the front upstream face of cofferdam 1, make the quicksand that the upstream impact get into conveyer pipe 2 through the quicksand outlet outflow from quicksand entry 3, the reduction position, reach the instant supply and the balance of 1 below silt of cofferdam. The inner surface of the conveying pipe 2 of the embodiment is also provided with a spiral chute 67, and the spiral chute 67 performs limiting and guiding functions on the spiral conveying mechanism.
Be provided with screw conveying mechanism in the inner chamber of conveyer pipe 2, screw conveying mechanism includes transmission shaft 54 and sets up at the helical blade 55 on transmission shaft 54 surface, transmission shaft 54 is the semi-flexible transmission shaft 54 that a plurality of connecting axles formed through the pin is articulated, transmission shaft 54 one end is connected fixedly through the semicircle end cover 51 of seting up the one end of quicksand entry 3 on first bearing 5 and the conveyer pipe 2, the other end of transmission shaft 54 is connected with the connecting plate 52 of fixing on conveyer pipe 2 through second bearing 53, the one end of seting up the quicksand export on conveyer pipe 2 is fixed to connecting plate 52. The helical blade 55 is fixed on the outer surface of the transmission shaft 54 and matched with the helical chute 67 of the conveying pipe 2 to realize sliding insertion.
The self-driving unit mainly converts the water flow impact force into a transmission driving force to drive the screw conveying mechanism to rotate. The self-driving unit comprises a stabilizing bracket 6, a protective ring 61, a propeller 65, a propeller shaft 64, a first belt pulley 56, a second belt pulley 66 and a conveyor belt; the stabilizing support 6 can be fixed on the upstream face of the cofferdam 1, the protecting ring 61 is fixedly connected with the outer surface of the conveying pipe 2 through the stabilizing support 6, the protecting ring 61 is arranged at the upper part of the stabilizing support 6, the inner wall of the protecting ring 61 is fixedly connected with a stabilizing rod 62, the surface of the stabilizing rod 62 is fixedly connected with a third bearing 63, the inner ring of the third bearing 63 is fixedly connected with a propeller shaft 64, namely, one end of the propeller shaft 64 is fixed on the stabilizing support 6 through the third bearing 63; the other end of the propeller shaft 64 is fixedly connected with a second belt pulley 66, the surface of the propeller shaft 64 on the inner side of the second belt pulley 66 is fixedly connected with a propeller 65, and the propeller 65 is impacted by water flow to rotate, so that the propeller shaft 64 is driven to rotate, and the second belt pulley 66 is driven to rotate. The second belt wheel 66, the first belt wheel 56 and the conveyor belt form a transmission assembly of the self-driving unit, the first belt wheel 56 is arranged below the second belt wheel 66 and is fixedly connected with the transmission shaft 54, the surface of the second belt wheel 66 and the surface of the first belt wheel 56 are connected through the conveyor belt in a transmission manner, the second belt wheel 66 rotates to drive the first belt wheel 56 to rotate, the transmission shaft 54 is further driven to rotate, and the spiral conveying mechanism in the conveying pipe 2 is driven to spirally convey silt in the pipe.
Grooves are formed in the outer surfaces of the first belt wheel 56 and the second belt wheel 66, and the conveying belts are embedded in the grooves to prevent the conveying belts from deviating.
The invention can achieve the effect of supplementary balance, and effectively solves the problem of local scouring with different degrees generated in the construction period of the cofferdam 1, particularly in the sinking process of the cofferdam 1.
The cofferdam riverbed protection method realized by the cofferdam riverbed anti-scouring protection device specifically comprises the following steps:
(1) installing an anti-scouring protection device of a cofferdam riverbed at the position with the maximum water flow impact at the lower end of the cofferdam 1;
(2) the water flow impact cofferdam 1 uses the impact force of water flow as the power for the rotation of the self-driving unit; specifically, the water flow impacts the cofferdam 1, the impact force of the water flow drives the propeller 65 to rotate, the propeller 65 rotates and drives the second belt pulley 66 to rotate through the propeller shaft 64, the second belt pulley 66 drives the first belt pulley 56 to rotate through the transmission connection of the conveyor belt, and the self-driving of the self-driving unit is completed;
(3) from drive unit rotation drive screw conveyor mechanism at 2 internal screw drive of conveyer pipe, form suction in 3 departments of the quicksand entry of conveyer pipe 2, absorb the silt that will wash away from 1 below in cofferdam and get into conveyer pipe 2, carry to quicksand export output through screw conveyor mechanism, restore to 1 below in cofferdam, specifically do promptly:
the first belt wheel 56 rotates to drive the transmission shaft 54 to rotate, the transmission shaft 54 rotates to drive the spiral blade 55 to rotate, a suction force is generated at the quicksand inlet 3, the suction force at the quicksand inlet 3 is combined with the inertia force of silt impact, so that the silt around the cofferdam 1 is sucked into the conveying pipe 2, the silt is driven by the spiral transmission of the spiral blade 55 to be conveyed to the other end of the conveying pipe 2 at one end of the conveying pipe 2, and is output through a quicksand outlet and reduced to the position below the cofferdam 1, and the stability of the riverbed of the cofferdam 1 is kept.
The specific construction process is generally as follows:
first, preventive maintenance construction
And the pre-protected sand and stone materials are all filled to the bottom of the river through the guide pipe, filling and throwing are carried out in a layered and partitioned mode, and the elevation of the river bed in the filling and throwing area is measured in real time in the filling and throwing process, so that the designed filling and throwing thickness is ensured. After 1 ~ 6 mm's grit in lower floor is thrown and is filled out and accomplish, need carry out the topographic survey under water, after guaranteeing to reach design thickness, can carry out the upper strata and throw and fill out the construction.
Second, riverbed monitoring
1. Before filling, the measurement group needs to measure the original riverbed section, draw an original riverbed section diagram and report the measured data in time as the basis of filling.
2. In the throwing and filling process, the elevation measurement of the riverbed in the throwing and filling area is tracked, the elevation change of the riverbed in the throwing and filling area is monitored, the throwing and filling operation is guided in time, and the designed throwing and filling thickness is ensured to be reached. After the reverse filtering layer (the lower layer of 1-6 mm sandstone) is filled, underwater topography measurement is needed, a filling area is drawn, measurement results are submitted in time, and the protection layer filling construction can be carried out after the design thickness is achieved;
3. after the protective layer is finished, the measurement group needs to carry out third measurement and describe the section shape of the protective layer; the throwing and filling amount of the prism is properly adjusted according to the actual throwing and filling condition so as to meet the engineering requirement;
4. and after the riprap arrises on the two sides of the upstream are finished, the measuring group needs to carry out fourth measurement, the condition of a new riverbed is described according to the measured data, and a final riprap result effect graph is handed in.
5. The on-site real-time measurement is the key work for controlling the throwing and filling amount, and before, during and after throwing and filling, measuring personnel and instruments must be organized, so that the throwing and filling data can be provided in real time, and guidance is provided for construction.
Thirdly, cofferdam 1 riverbed protection
The invention discloses a cofferdam riverbed protection method.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical scope of the present invention by equivalent replacement or change according to the technical solution and the inventive concept of the present invention within the technical scope of the present invention.
Claims (10)
1. The utility model provides a protector of cofferdam riverbed scour protection which characterized in that: the cofferdam protection device comprises at least 1 protection unit arranged on the water facing side of a cofferdam (1), wherein the protection unit comprises a conveying pipe (2), a spiral conveying mechanism and a self-driving unit; the sand flow inlet (3) is formed in one end of the conveying pipe (2), the sand flow outlet is formed in the other end of the conveying pipe, the sand flow outlets of the self-driving unit and the conveying pipe (2) are arranged on the upstream face of the cofferdam (1), the self-driving unit is connected with the spiral conveying mechanism through a connecting bearing and drives the spiral conveying mechanism to transmit through the self-driving unit, and the sand flow entering from the sand flow inlet (3) is transmitted to the sand flow outlet to be output.
2. The cofferdam riverbed anti-scouring protection device as claimed in claim 1, wherein: conveyer pipe (2) are the arc return bend, and quicksand entry (3) of conveyer pipe (2) set up in the side of cofferdam (1), and the quicksand export setting of conveyer pipe (2) is in the below from drive unit, makes the quicksand that meets water impact get into conveyer pipe (2) from quicksand entry (3) and export the outflow through the quicksand, the reduction position.
3. The cofferdam riverbed anti-scouring protection device as claimed in claim 2, wherein: the self-driving unit comprises a stabilizing bracket (6), a protective ring (61), a propeller (65), a propeller shaft (64) and a transmission assembly; the stabilizing bracket (6) is fixedly connected with the conveying pipe (2); the protective ring (61) is arranged at the upper part of the stabilizing bracket (6), the propeller (65) is arranged on the outer surface of the propeller shaft (64) in the protective ring (61), and one end of the propeller shaft (64) is fixedly connected with the upper part of the stabilizing bracket (6) through a bearing; the propeller shaft (64) is connected with the screw conveying mechanism through a transmission assembly.
4. The cofferdam riverbed anti-scouring protection device as claimed in claim 3, wherein: the transmission assembly comprises a first pulley (56), a second pulley (66) and a conveyor belt; the second belt wheel (66) is fixedly connected with the other end of the propeller shaft (64); the first belt wheel (56) is arranged below the second belt wheel (66) and connected with the spiral conveying mechanism, and the first belt wheel (56) is connected with the second belt wheel (66) through a conveying belt.
5. The cofferdam riverbed anti-scouring protection device as claimed in claim 4, wherein: grooves are formed in the outer surfaces of the first belt wheel (56) and the second belt wheel (66), and the conveying belt is embedded in the grooves.
6. The cofferdam riverbed anti-scouring protection device as claimed in claim 4, wherein: the spiral conveying mechanism comprises a transmission shaft (54) and spiral blades (55) arranged on the surface of the transmission shaft (54), two ends of the transmission shaft (54) are connected with an end cover of the conveying pipe (2) through bearings respectively, a first belt wheel (56) is arranged at one end of the transmission shaft (54), is fixedly connected with the transmission shaft (54) and the first belt wheel (56), and is driven to rotate by the rotation of the first belt wheel (56).
7. The cofferdam riverbed anti-scouring protection device as claimed in claim 6, wherein: the inner surface of the conveying pipe (2) is provided with a spiral chute (67) matched with the spiral blade (55), so that the surface of the spiral blade (55) is in sliding insertion connection with the inner wall of the conveying pipe (2).
8. The cofferdam riverbed protecting method realized by the cofferdam riverbed anti-scouring protecting device of claim 1 is characterized by comprising the following steps:
(1) installing the cofferdam riverbed anti-scouring protection device of claim 1 at the position of the highest water flow impact at the lower end of the cofferdam (1);
(2) the water flow impact cofferdam (1) utilizes the impact force of water flow as the power for the rotation of the self-driving unit;
(3) the self-driving unit rotates to drive the spiral conveying mechanism to perform spiral transmission in the conveying pipe (2), suction is formed at the quicksand inlet (3) of the conveying pipe (2), silt flushed away from the lower part of the cofferdam (1) is sucked into the conveying pipe (2), and the silt is conveyed to a quicksand outlet through the spiral conveying mechanism to be output and reduced to the lower part of the cofferdam (1).
9. The cofferdam riverbed protection method according to claim 8, wherein the step (2) is specifically: the water flow impacts the cofferdam (1), the impact force of the water flow drives the propeller (65) to rotate, the propeller (65) rotates and drives the second belt wheel (66) to rotate through the propeller shaft (64), and the second belt wheel (66) is connected through the transmission of the conveyor belt to drive the first belt wheel (56) to rotate, so that the self-driving of the self-driving unit is completed.
10. The cofferdam riverbed protection method according to claim 9, wherein the step (3) is specifically: the first belt wheel (56) drives the transmission shaft (54) to rotate when rotating, the transmission shaft (54) drives the spiral blade (55) to rotate, suction is generated at the quicksand inlet (3), the suction at the quicksand inlet (3) is combined with the inertia force of silt impact, so that silt around the cofferdam (1) is sucked to enter the conveying pipe (2), the silt is driven to be conveyed to the other end of the conveying pipe (2) at one end of the conveying pipe (2) through the spiral transmission of the spiral blade (55), and the silt is output through a quicksand outlet and is reduced to the position below the cofferdam (1), and the stability of a riverbed of the cofferdam (1) is kept.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010560266.7A CN111636491A (en) | 2020-06-18 | 2020-06-18 | Cofferdam riverbed anti-scouring protection device and cofferdam riverbed protection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010560266.7A CN111636491A (en) | 2020-06-18 | 2020-06-18 | Cofferdam riverbed anti-scouring protection device and cofferdam riverbed protection method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111636491A true CN111636491A (en) | 2020-09-08 |
Family
ID=72330180
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010560266.7A Pending CN111636491A (en) | 2020-06-18 | 2020-06-18 | Cofferdam riverbed anti-scouring protection device and cofferdam riverbed protection method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111636491A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113684856A (en) * | 2021-08-31 | 2021-11-23 | 华能(浙江)能源开发有限公司清洁能源分公司 | Offshore wind power foundation with worm sand guiding function |
| CN114991077A (en) * | 2022-06-09 | 2022-09-02 | 深圳市永丰生态环境有限公司 | Circulation backfill type slope water and soil conservation structure |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1244614A (en) * | 1998-08-07 | 2000-02-16 | 何相华 | Pipe silt discharging method and discharger |
| JP2007023694A (en) * | 2005-07-20 | 2007-02-01 | Kojimagumi:Kk | Dredging system to deposit sediment of water bottom |
| CN102121449A (en) * | 2010-01-08 | 2011-07-13 | 马瑞志 | Hydrodynamic machine, and using method and application thereof |
| CN102912761A (en) * | 2012-11-06 | 2013-02-06 | 陈伟 | River training method through wind |
| JP2015098671A (en) * | 2013-11-18 | 2015-05-28 | 日立造船株式会社 | Sediment discharge facility for dam reservoir |
| CN207212573U (en) * | 2017-08-30 | 2018-04-10 | 彭秀清 | A kind of device using sand in waterpower acting and recyclable water |
| CN108661100A (en) * | 2017-03-28 | 2018-10-16 | 山东科技大学 | A kind of reservoir desilting system of novel hydropower driving |
| CN110055928A (en) * | 2019-04-28 | 2019-07-26 | 华北水利水电大学 | Riverbed restorative procedure and system are washed away in dam body downstream |
| CN209779650U (en) * | 2018-12-24 | 2019-12-13 | 中国建筑第六工程局有限公司 | structure for improving stability of steel sheet pile cofferdam in scour area |
| CN212506444U (en) * | 2020-06-18 | 2021-02-09 | 辽宁省公路勘测设计公司 | Cofferdam riverbed anti-scouring protection device |
-
2020
- 2020-06-18 CN CN202010560266.7A patent/CN111636491A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1244614A (en) * | 1998-08-07 | 2000-02-16 | 何相华 | Pipe silt discharging method and discharger |
| JP2007023694A (en) * | 2005-07-20 | 2007-02-01 | Kojimagumi:Kk | Dredging system to deposit sediment of water bottom |
| CN102121449A (en) * | 2010-01-08 | 2011-07-13 | 马瑞志 | Hydrodynamic machine, and using method and application thereof |
| CN102912761A (en) * | 2012-11-06 | 2013-02-06 | 陈伟 | River training method through wind |
| JP2015098671A (en) * | 2013-11-18 | 2015-05-28 | 日立造船株式会社 | Sediment discharge facility for dam reservoir |
| CN108661100A (en) * | 2017-03-28 | 2018-10-16 | 山东科技大学 | A kind of reservoir desilting system of novel hydropower driving |
| CN207212573U (en) * | 2017-08-30 | 2018-04-10 | 彭秀清 | A kind of device using sand in waterpower acting and recyclable water |
| CN209779650U (en) * | 2018-12-24 | 2019-12-13 | 中国建筑第六工程局有限公司 | structure for improving stability of steel sheet pile cofferdam in scour area |
| CN110055928A (en) * | 2019-04-28 | 2019-07-26 | 华北水利水电大学 | Riverbed restorative procedure and system are washed away in dam body downstream |
| CN212506444U (en) * | 2020-06-18 | 2021-02-09 | 辽宁省公路勘测设计公司 | Cofferdam riverbed anti-scouring protection device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113684856A (en) * | 2021-08-31 | 2021-11-23 | 华能(浙江)能源开发有限公司清洁能源分公司 | Offshore wind power foundation with worm sand guiding function |
| CN114991077A (en) * | 2022-06-09 | 2022-09-02 | 深圳市永丰生态环境有限公司 | Circulation backfill type slope water and soil conservation structure |
| CN114991077B (en) * | 2022-06-09 | 2024-02-23 | 深圳市永丰生态环境有限公司 | Circulation backfill type slope soil and water conservation structure |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111636491A (en) | Cofferdam riverbed anti-scouring protection device and cofferdam riverbed protection method | |
| CN212506444U (en) | Cofferdam riverbed anti-scouring protection device | |
| CN114926101B (en) | Construction speed and safety-oriented TBM (Tunnel boring machine) adaptive surrounding rock grading method | |
| CN101538857A (en) | Pile extraction construction method | |
| GB2461983A (en) | Water turbine with unidirectional rotation | |
| CN103526765A (en) | Self-floating steel cofferdam for underwater concrete plane construction | |
| CN115059121A (en) | Wave-absorbing energy dissipation system and method for reducing scouring of pile group foundation | |
| CN108993974A (en) | Clear up the system and method for cutter suction dredger reamer head automatically using high-pressure jet | |
| CN111075635B (en) | Tidal power generation device | |
| CN112709274A (en) | Water-spraying jet rock digging device of dredging dredger | |
| CN211395795U (en) | Hydraulic engineering bank protection desilting device | |
| CN108797570B (en) | Stirring pile drilling machine | |
| CN105316994B (en) | Device is dug in a kind of milling | |
| CN210857121U (en) | Intelligent trash remover for hydropower station | |
| CN208728139U (en) | Clear up the system of cutter suction dredger reamer head automatically using high-pressure jet | |
| CN210396745U (en) | Pumped storage chamber suitable for TBM construction | |
| CN220099781U (en) | Water conservancy construction guiding device | |
| CN113389677A (en) | Hydroelectric generation subassembly | |
| CN209620019U (en) | Pipe device based on bored concrete pile provided pipe | |
| CN207047804U (en) | Intermediate flow rivers rip current type hydroelectric power system | |
| CN210827353U (en) | Dam structure for hydraulic engineering | |
| CN207073442U (en) | Ocean power generating device and its power generation with marine energy water-leakage protecting device | |
| CN109723019A (en) | A kind of dust-removing method of slope excavating | |
| CN213898035U (en) | Water conservancy construction safety device | |
| CN218479120U (en) | Tail water branch pipe structure for preventing silt and crushed stone from wearing pumped storage power station unit |
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 |