A construction method for clearing river silt and a high-pressure water gun device used therein

Abstract

The present invention relates to a construction method for clearing silt from a river channel and a high-pressure water gun device used therefor, which belong to the technical field of electromechanical water environment management and ecological restoration construction. The technical problem to be solved is to provide a construction method for clearing silt from a river channel and a high-pressure water gun device used therefor, and the adopted scheme is: the high-pressure water gun device comprises a base plate, one end of the base plate is fixedly mounted with a mounting base, the top center of the mounting base is fixedly mounted with a fixing seat, and the top of the mounting base is fixedly mounted with a spraying mechanism. The present invention effectively solves the problems of high safety risk factor in water-carrying excavation, high cost of purchasing and cleaning stone pieces, environmental pollution caused by dump trucks transporting mud, and difficulty in controlling river bottom flatness and cleaning conditions. At the same time, it also solves the limitations of dredging boat construction on dredging of small and medium-sized rivers, low dredging efficiency and high cost. The present invention is applied to the technical field of electromechanical water environment management and ecological restoration construction.

Description

Technical Field

[0001] The invention discloses a construction method for clearing river silt and a high-pressure water gun device used therefor, belonging to the technical field of electromechanical water environment management and ecological restoration construction. Background Art

[0002] There are many methods for river dredging, and their scope of application is also different. Usually, excavators with water or dredging ships are used for construction. However, for medium-sized rivers and some small rivers, the river width is relatively wide, and excavators with water construction require the construction of many temporary roads to allow machinery to enter the dredging site. After dredging is completed, the temporary roads need to be cleared. The filling and removal of temporary roads require a large amount of earth and stone, and a large number of machines are used. It is difficult to ensure dust control while the earth and stone operations are carried out, which has a certain impact on the nearby ecological environment.

[0003] Dredging boat construction includes slurry suction construction, stirring suction construction, and bucket wheel dredging. Slurry suction construction uses a mud pump to suck up the silt from the riverbed and put it into the storage yard on the shore. It is suitable for dredging medium and large rivers with thick and weak mud layers. The stirring suction construction method is a dredging method formed by improving the slurry suction method. It is more advanced than the slurry suction method. This dredging method still has significant advantages for large rivers such as the Yangtze River and Huaihe River. It is currently the main method used. Bucket wheel dredging: It uses a special bucket wheel excavator installed on a bucket wheel dredger to excavate underwater silt. The excavated silt is sucked into the dredger by the high-powered mud pump on the dredger and enters the mud pipeline. It is transported to the designated mud unloading area through a fully enclosed pipeline. It is generally suitable for dredging medium and large rivers, lakes and reservoirs with thick mud layers and large engineering quantities. It is a commonly used method for engineering dredging, but the silt removal rate is not high, the dredging is not thorough, and it is easy to cause large-scale water pollution. At the same time, it is costly and inefficient.

[0004] Therefore, it is necessary to provide a new construction method for removing river silt and a high-pressure water gun device used therein to solve the above-mentioned technical problems. Summary of the Invention

[0005] In order to solve the above technical problems, the present invention provides a construction method for clearing river silt and a high-pressure water gun device used therein.

[0006] The high-pressure water gun device provided by the present invention includes: a base plate, one end of the base plate is fixedly installed with a mounting base, a fixing seat is fixedly installed at the top center of the mounting base, a spraying mechanism is fixedly installed at the top of the mounting base, and a tensioning mechanism is fixedly installed on the upper surface of the base plate, the water outlet end of the tensioning mechanism and the water inlet end of the spraying mechanism are connected to each other, and the spraying mechanism includes: a first working motor, the first working motor is fixedly installed on one side of the fixing seat, the output end of the first working motor is fixedly connected to one end of the first worm through the side wall of the fixing seat, and the first worm is rotatably connected to the inside of the fixing seat, the inside of the fixing seat is rotatably connected with a first worm gear, and the first worm gear and the first worm are threadedly connected, and a rotating column is fixedly installed on the first worm gear, and one end of the rotating column is fixedly connected to the center of the lower surface of the fixing plate through the side wall of the fixing seat.

[0007] Preferably, the spraying mechanism also includes: side plates, the two side plates are symmetrically fixedly mounted at the two ends of the upper surface of the fixed plate, a rotating plate is rotatably connected between the bottom ends of the two side plates, a fixed frame is fixedly mounted at the center of the upper surface of the fixed plate, a second working motor is fixedly mounted on one side of the fixed frame, the output end of the second working motor passes through the side wall of the fixed frame and is fixedly connected to one end of the second worm gear, and the second worm gear is rotatably connected to the inner wall of the fixed frame, a second worm gear is fixedly mounted on the middle part of the rotating plate, the second worm gear and the second worm gear are threadedly connected, guide rods are fixedly mounted at both ends of the rotating plate, and the guide rods are slidably connected to the side plates, and a high-pressure water gun assembly is symmetrically fixedly mounted on the upper surface of the fixed plate.

[0008] Preferably, a mounting groove that cooperates with the second worm gear is provided in the middle of the rotating plate.

[0009] Preferably, limiting columns are symmetrically fixedly mounted on the upper surface of the fixing seat, and a surface of the fixing plate is provided with a sliding groove that slidably cooperates with the limiting columns.

[0010] Preferably, the side plate is provided with an arc-shaped groove which slides with the guide rod.

[0011] Preferably, the tensioning mechanism includes: a vertical rod, four of the vertical rods are rectangular and fixedly mounted on the upper surface of the base plate, the tops of the four vertical rods are fixedly mounted with a mounting plate, a screw rod is provided between the four vertical rods, and one end of the screw rod is rotatably connected to the upper surface of the base plate, the end of the screw rod away from the base plate passes through the side wall of the mounting plate and is fixedly connected to the lower surface of the rotating disk, and the screw rod is rotatably connected to the mounting plate, a lifting plate is slidably connected to the four vertical rods, and the lifting plate is threadedly connected to the screw rod, and both ends of the lifting plate are fixedly mounted with a fixing strip, and both ends of the fixing strip are A first guide wheel is rotatably connected, a second guide wheel is provided below the first guide wheel, one end of the second guide wheel is rotatably connected to one side of the mounting block, wherein two of the mounting blocks are threadedly connected to the threaded rod, one end of the two threaded rods passes through two of the mounting blocks and is rotatably connected to the other two mounting blocks, a handwheel is fixedly installed on one end of the threaded rod, both ends of the threaded rod are rotatably connected to fixed blocks, and the fixed block is fixedly connected to the upper surface of the base plate, a water pipe is sleeved on the first guide wheel and the second guide wheel, and one end of the water pipe is fixedly connected to the water inlet end of the high-pressure water gun assembly.

[0012] Preferably, sliders are provided at the bottom ends of the two mounting blocks, and sliding grooves symmetrically connected to the sliders at the bottom ends of the mounting blocks are provided on the upper surface of the base plate.

[0013] The present invention also provides a construction method for clearing river silt using a high-pressure water gun device, comprising:

[0014] 1) Layout of abandoned mud area

[0015] a. Selection of abandoned mud area

[0016] The location of the abandoned mud area should not be too far from the operation site to facilitate ecological restoration. The distance for transportation should be selected according to the head of the mud pump.

[0017] b. Clearing the abandoned mud area

[0018] Remove surface corrosive soil and grass roots;

[0019] c. Cofferdam filling in the abandoned mud area

[0020] The height and slope of the cofferdam should be determined according to the actual situation;

[0021] d. Renovation and restoration of abandoned mud areas

[0022] After the mud hardens, spread wolfsbane and other hardy grass seeds to restore vegetation;

[0023] 2) Excavation of diversion channels

[0024] a. Measurement and layout

[0025] Before construction, use a total station and level to measure the original surface of the diversion channel and keep records. The measurement record book and the results will be submitted to the supervising engineer for review and signature approval.

[0026] b. Excavation of diversion channels

[0027] Excavators are used for excavation and slope cutting. All earthwork is transported to the designated dumping area. During construction, excavation is carried out layer by layer from top to bottom according to the measured opening line. The thickness of each layer is generally controlled at 2m to 3m.

[0028] 3) Use high-pressure water guns and mud pumps to remove river silt.

[0029] a. River cofferdam filling

[0030] According to the construction river conditions, reasonable division is carried out to carry out cofferdam construction;

[0031] The cofferdam filling is divided into two steps: filling below the water and filling above the water. The cofferdam filling adopts the silt squeezing method. When filling the cofferdam, the upstream and downstream cofferdams start from the right and end on the left. Each cofferdam is equipped with a bulldozer, which is responsible for filling the earth within its own construction range. When the earthwork is closed, the earthwork can be transported to the cofferdam waiting area first. After the earth material is sufficient, the bulldozer is used to push it into the water. When the cofferdam is closed and the water filling is 80 cm higher than the river surface, it is compacted layer by layer with a roller to carry out the water filling. The water filling adopts layered soil laying, each layer is 25 cm thick, and compacted layer by layer.

[0032] b. Construction precipitation

[0033] Use sewage pumps to pump out water, and after the water between the two cofferdams is pumped out, proceed with hydraulic excavation;

[0034] c. Mud pipe layout

[0035] The site, road and embankment with flat terrain and convenient transportation should be selected for layout, with smooth direction and short route, avoiding sharp bends and large ups and downs;

[0036] d. River dredging

[0037] The construction principle of hydraulic excavation is to simulate the principle of water scouring in nature, and use hydraulic action to excavate soil. That is, water flows through a high-pressure pump to generate pressure, and a dense high-speed water column is sprayed through the spraying mechanism of the high-pressure water gun device to cut and crush the soil, making it wet and disintegrate, forming a mixture of silt and mud blocks, which is then sucked and transported to the mud disposal area by a vertical mud pump and its mud delivery pipe;

[0038] The method of first slope and then depth is adopted during construction. This method shortens the duration of water retention during construction, makes it easier to control the slope foot at the bottom angle line of the riverbed design, and reduces invalid earthwork. The overall principle is to start construction from the middle of the block and gradually spread to the surrounding areas, gradually forming a "pot bottom shape". During scouring, the construction working surface is cut horizontally (using the close-range rapid cutting method to cut soil blocks). That is, the water gun operator stands in the middle and lower part of the river slope, and the gun head is about 1.5m away from the working surface to quickly cut horizontally. The concentrated water flow and the potential energy of the river slope are used to make the mud blocks quickly enter the mud suction pump;

[0039] During the construction process, the excavation should be carried out in layers. At the same time, the construction workers and professional surveyors should conduct measurements in time to strictly control the construction quality. If the mud pump impeller is blocked and debris must be removed, the mud pump water level must be kept above 1m. A dedicated person must cut off the power supply and supervise it. After the removal is completed, the power will be restored by a dedicated person to avoid safety accidents. The water for excavation in the initial construction starting from the section should be drawn from the upstream.

[0040] Desilting steps:

[0041] 1. First, carry out construction preparation work, including the selection of the layout location of the mud disposal area, the direction of the diversion channel, the division of the river dredging construction section, and the selection of construction equipment;

[0042] 2. Start excavation of the waste mud area, diversion channel, and river cofferdam construction according to the on-site layout;

[0043] 3. After the diversion channel is completed, diversion can be carried out, that is, the water in the river channel is diverted into the diversion channel, and the water level in the river channel begins to drop until the silt is exposed;

[0044] 4. Artificially enter the river channel and use high-pressure water guns to cut and crush the silt, and use mud pumps to suck the crushed silt into the waste mud area;

[0045] 5. After dredging is completed, the water level in the river will be restored, and grass seeds will be sown in the abandoned mud area to restore the ecology.

[0046] Compared with related technologies, the construction method for clearing river silt provided by the present invention and the high-pressure water gun device used therein have the following beneficial effects:

[0047] The present invention provides a construction method for clearing river silt and a high-pressure water gun device used therein, which effectively solves the problems of high safety risk factor in water-carrying excavation, high cost of purchasing and cleaning stone pieces, environmental pollution caused by dump trucks transporting mud, and difficulty in controlling riverbed flatness and cleaning conditions. At the same time, it also solves the problems of limitation of dredging vessels for dredging small and medium-sized rivers, low dredging efficiency and high cost. The dredging method of clearing river silt by using a high-pressure water gun in combination with a mud pump can achieve the purpose of dredging and clearing silt, while ensuring drainage, flood control and irrigation functions, improving river water quality and promoting ecosystem health.

[0048] In addition, the high-pressure water gun device involved in the present invention can adjust the spray direction of the device according to actual needs. The mechanized adjustment and fixing method avoids human contact and reduces safety hazards in construction. In addition, the device has a water pipe adjustment mechanism that can accommodate water pipes of a certain length. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 A schematic structural diagram of a preferred embodiment of a method for clearing river silt provided by the present invention and a high-pressure water gun device used therein;

[0050] Figure 2 for Figure 1 The structural diagram of the spraying mechanism shown;

[0051] Figure 3 for Figure 1 The structural diagram of the tensioning mechanism shown;

[0052] Figure 4 The figure is a schematic diagram of the overall process;

[0053] Figure 5 This is a schematic diagram of the overall layout;

[0054] Figure 6 It is a cross-sectional schematic diagram.

[0055] Numbers in the figure: 1. Base plate; 2. Mounting base; 3. Fixed seat; 4. Spraying mechanism; 5. Tensioning mechanism; 6. First working motor; 7. First worm; 8. First worm gear; 9. Rotating column; 10. Fixed plate; 11. Side plate; 12. Rotating plate; 13. Fixed frame; 14. Second working motor; 15. Second worm; 16. Second worm gear; 17. Guide rod; 18. Limiting column; 19. Vertical rod; 20. Mounting plate; 21. Screw; 22. Rotating disk; 23. Lifting plate; 24. Fixed bar; 25. First guide wheel; 26. Second guide wheel; 27. Mounting block; 28. Threaded rod; 29. ​​Handwheel; 30. Fixed block; 31. Water pipe; 32. High-pressure water gun assembly. DETAILED DESCRIPTION

[0056] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0057] In the specific implementation process, Figure 1 、 Figure 2 and Figure 3As shown, the substrate 1, one end of the substrate 1 is fixedly installed with a mounting base 2, the top center of the mounting base 2 is fixedly installed with a fixing seat 3, the top of the mounting base 2 is fixedly installed with a spraying mechanism 4, the upper surface of the substrate 1 is fixedly installed with a tensioning mechanism 5, the water outlet end of the tensioning mechanism 5 is connected to the water inlet end of the spraying mechanism 4, and the spraying mechanism 4 includes: a first working motor 6, the first working motor 6 is fixedly installed on one side of the fixing seat 3, the output end of the first working motor 6 passes through the side wall of the fixing seat 3 and is fixedly connected to one end of the first worm 7, and the first worm 7 is rotatably connected to the inside of the fixing seat 3, the inside of the fixing seat 3 is rotatably connected with a first worm gear 8, and the first worm gear 8 and the first worm 7 are threadedly connected, and a rotating column 9 is fixedly installed on the first worm gear 8, and one end of the rotating column 9 passes through the side wall of the fixing seat 3 and is fixedly connected to the center of the lower surface of the fixing plate 10.

[0058] It should be noted that when this equipment is needed to dredge the river, the equipment should be placed in a suitable working position first. At this time, the tensioning mechanism 5 is adjusted to connect the equipment to the external water source. After the water source is connected, a dense high-speed water column is sprayed out through the spraying mechanism 4 to cut and crush the soil, making it wet and disintegrate, forming a mixture of silt and mud blocks, and then sucked to the mud disposal area by the vertical mud pump and its mud pipe.

[0059] refer to Figure 2 As shown, the spraying mechanism 4 also includes: side panels 11, the two side panels 11 are symmetrically fixedly mounted at the two ends of the upper surface of the fixed plate 10, and a rotating plate 12 is rotatably connected between the bottom ends of the two side panels 11, a fixed frame 13 is fixedly mounted on the center of the upper surface of the fixed plate 10, and a second working motor 14 is fixedly mounted on one side of the fixed frame 13, and the output end of the second working motor 14 passes through the side wall of the fixed frame 13 and is fixedly connected to one end of the second worm 15, and the second worm 15 is rotatably connected to the inner wall of the fixed frame 13, a second worm gear 16 is fixedly mounted on the middle part of the rotating plate 12, and the second worm gear 16 is threadedly connected to the second worm 15, a guide rod 17 is fixedly mounted on both ends of the rotating plate 12, and the guide rod 17 is slidably connected to the side panels 11, and a high-pressure water gun assembly 32 is symmetrically fixedly mounted on the upper surface of the fixed plate 10.

[0060] It should be noted that: when the silt removal work is started through the spraying mechanism 4, the staff can adjust the horizontal angle of the high-pressure water gun assembly 32 through the first worm 7 and the first worm gear 8. The setting of the limiting column 18 can limit the horizontal angle adjustment of the high-pressure water gun assembly 32. In addition, when adjusting the vertical angle of the high-pressure water gun assembly 32, the staff can adjust it through the second worm 15 and the second worm gear 16. Similarly, side plates 11 are provided at both ends of the rotating plate 12, which can be used in conjunction with the guide rod 17 to limit the vertical angle adjustment of the rotating plate 12.

[0061] refer to Figure 2 As shown, a mounting groove is provided in the middle of the rotating plate 12 to cooperate with the second worm gear 16 .

[0062] It should be noted that the mounting groove on the rotating plate 12 can be used to mount the second worm gear 16 , and at the same time, when the rotating plate 12 rotates, it will not be blocked by the fixed frame 13 .

[0063] refer to Figure 2 As shown, the upper surface of the fixing seat 3 is symmetrically fixed with a limiting column 18 , and the surface of the fixing plate 10 is provided with a sliding groove that slides with the limiting column 18 .

[0064] It should be noted that the sliding groove on the surface of the fixed plate 10 cooperates with the limiting column 18 to limit the horizontal rotation angle of the rotating plate 12.

[0065] refer to Figure 2 As shown, the side plate 11 is provided with an arc groove which slides with the guide rod 17 .

[0066] It should be noted that the arc-shaped groove on the side plate 11 can limit the rotation of the rotating plate 12 in the vertical direction.

[0067] refer to Figure 3As shown, the tensioning mechanism 5 includes: a vertical rod 19, four of the vertical rods 19 are rectangular and fixedly mounted on the upper surface of the base plate 1, a mounting plate 20 is fixedly mounted on the top of the four vertical rods 19, a screw rod 21 is provided between the four vertical rods 19, and one end of the screw rod 21 is rotatably connected to the upper surface of the base plate 1, the end of the screw rod 21 away from the base plate 1 passes through the side wall of the mounting plate 20 and is fixedly connected to the lower surface of the rotating disk 22, and the screw rod 21 is rotatably connected to the mounting plate 20, a lifting plate 23 is slidably connected to the four vertical rods 19, and the lifting plate 23 is threadedly connected to the screw rod 21, and both ends of the lifting plate 23 are fixedly mounted with a fixing bar 24, and both ends of the fixing bar 24 are A first guide wheel 25 is rotatably connected, and a second guide wheel 26 is provided below the first guide wheel 25. One end of the second guide wheel 26 is rotatably connected to one side of the mounting block 27, wherein two of the mounting blocks 27 are threadedly connected to the threaded rod 28, and one end of the two threaded rods 28 passes through two of the mounting blocks 27 and is rotatably connected to the other two mounting blocks 27. A handwheel 29 is fixedly installed at one end of the threaded rod 28, and both ends of the threaded rod 28 are rotatably connected to fixed blocks 30, and the fixed block 30 is fixedly connected to the upper surface of the base plate 1. A water pipe 31 is sleeved on the first guide wheel 25 and the second guide wheel 26, and one end of the water pipe 31 is fixedly connected to the water inlet end of the high-pressure water gun assembly 32.

[0068] It should be noted that when it is necessary to adjust the tension of the water pipe 31, the staff can rotate the screw rod 21 by turning the disk 22. As the screw rod 21 rotates, the mounting plate 20 will move along the vertical rod 19. As the mounting plate 20 moves, the fixing bar 24 will change accordingly. At this time, the first guide wheel 25 on the fixing bar 24 will adjust the tension of the water pipe 31. In addition, the staff can rotate the threaded rod 28 by the handwheel 29. As the threaded rod 28 rotates, the spacing between the mounting blocks 27 increases, thereby increasing the spacing of the second guide wheel 26, thereby increasing the length of the water pipe 31 between the first guide wheel 25 and the second guide wheel 26, and thereby increasing the length of the water pipe 31 accommodated by the tensioning mechanism 5.

[0069] refer to Figure 3 As shown, two of the mounting blocks 27 are provided with sliders at their bottom ends, and the upper surface of the base plate 1 is symmetrically provided with sliding grooves that are slidably connected to the sliders at the bottom ends of the mounting blocks 27 .

[0070] It should be noted that the sliding groove on the upper surface of the base plate 1 can increase the stability of the mounting block 27 during movement.

[0071] refer to Figure 4 、 Figure 5 and Figure 6As shown, the present invention also provides a construction method for clearing river silt using a high-pressure water gun device, comprising:

[0072] 1) Layout of abandoned mud area

[0073] a. Selection of abandoned mud area

[0074] The location of the abandoned mud area should not be too far from the operation site to facilitate ecological restoration. The distance for transportation should be selected according to the head of the mud pump.

[0075] b. Clearing the abandoned mud area

[0076] Remove surface corrosive soil and grass roots;

[0077] c. Cofferdam filling in the abandoned mud area

[0078] The height and slope of the cofferdam should be determined according to the actual situation;

[0079] d. Renovation and restoration of abandoned mud areas

[0080] After the mud hardens, spread wolfsbane and other hardy grass seeds to restore vegetation;

[0081] 2) Excavation of diversion channels

[0082] a. Measurement and layout

[0083] Before construction, use a total station and level to measure the original surface of the diversion channel and keep records. The measurement record book and the results will be submitted to the supervising engineer for review and signature approval.

[0084] b. Excavation of diversion channels

[0085] Excavators are used for excavation and slope cutting. All earthwork is transported to the designated dumping area. During construction, excavation is carried out layer by layer from top to bottom according to the measured opening line. The thickness of each layer is generally controlled at 2m to 3m.

[0086] 3) Use high-pressure water guns and mud pumps to remove river silt.

[0087] a. River cofferdam filling

[0088] According to the construction river conditions, reasonable division is carried out to carry out cofferdam construction;

[0089] The cofferdam filling is divided into two steps: filling below the water and filling above the water. The cofferdam filling adopts the silt squeezing method. When filling the cofferdam, the upstream and downstream cofferdams start from the right and end on the left. Each cofferdam is equipped with a bulldozer, which is responsible for filling the earth within its own construction range. When the earthwork is closed, the earthwork can be transported to the cofferdam waiting area first. After the earth material is sufficient, the bulldozer is used to push it into the water. When the cofferdam is closed and the water filling is 80 cm higher than the river surface, it is compacted layer by layer with a roller to carry out the water filling. The water filling adopts layered soil laying, each layer is 25 cm thick, and compacted layer by layer.

[0090] b. Construction precipitation

[0091] Use sewage pumps to pump out water, and after the water between the two cofferdams is pumped out, proceed with hydraulic excavation;

[0092] c. Mud pipe layout

[0093] The site, road and embankment with flat terrain and convenient transportation should be selected for layout, with smooth direction and short route, avoiding sharp bends and large ups and downs;

[0094] d. River dredging

[0095] The construction principle of hydraulic excavation is to simulate the principle of water scouring in nature, and to excavate the soil with the help of hydraulic action. That is, water flows through the high-pressure pump to generate pressure, and a dense high-speed water column is sprayed through the spraying mechanism 4 in the high-pressure water gun device, which cuts and crushes the soil, makes it wet and disintegrates, and forms a mixture of silt and mud blocks. The slurry is then sucked into the mud disposal area by the vertical mud pump and its mud delivery pipe.

[0096] The method of first slope and then depth is adopted during construction. This method shortens the duration of water retention during construction, makes it easier to control the slope foot at the bottom angle line of the riverbed design, and reduces invalid earthwork. The overall principle is to start construction from the middle of the block and gradually spread to the surrounding areas, gradually forming a "pot bottom shape". During scouring, the construction working surface is cut horizontally (using the close-range rapid cutting method to cut soil blocks). That is, the water gun operator stands in the middle and lower part of the river slope, and the gun head is about 1.5m away from the working surface to quickly cut horizontally. The concentrated water flow and the potential energy of the river slope are used to make the mud blocks quickly enter the mud suction pump;

[0097] During the construction process, the excavation should be carried out in layers. At the same time, the construction workers and professional surveyors should conduct measurements in time to strictly control the construction quality. If the mud pump impeller is blocked and debris must be removed, the mud pump water level must be kept above 1m. A dedicated person must cut off the power supply and supervise it. After the removal is completed, the power will be restored by a dedicated person to avoid safety accidents. The water for excavation in the initial construction starting from the section should be drawn from the upstream.

[0098] Desilting steps:

[0099] 1. First, carry out construction preparation work, including the selection of the layout location of the mud disposal area, the direction of the diversion channel, the division of the river dredging construction section, and the selection of construction equipment;

[0100] 2. Start excavation of the waste mud area, diversion channel, and river cofferdam construction according to the on-site layout;

[0101] 3. After the diversion channel is completed, diversion can be carried out, that is, the water in the river channel is diverted into the diversion channel, and the water level in the river channel begins to drop until the silt is exposed;

[0102] 4. Artificially enter the river channel and use high-pressure water guns to cut and crush the silt, and use mud pumps to suck the crushed silt into the waste mud area;

[0103] 5. After dredging is completed, the water level in the river will be restored, and grass seeds will be sown in the abandoned mud area to restore the ecology.

[0104] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention description and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A high-pressure water gun device, characterized in that: include: A base plate (1), one end of the base plate (1) is fixedly mounted with a mounting base (2), a fixing seat (3) is fixedly mounted at the center of the top of the mounting base (2), a spraying mechanism (4) is fixedly mounted at the top of the mounting base (2), a tensioning mechanism (5) is fixedly mounted on the upper surface of the base plate (1), a water outlet end of the tensioning mechanism (5) is connected to a water inlet end of the spraying mechanism (4), and the spraying mechanism (4) comprises: a first working motor (6), the first working motor (6) is fixedly mounted on the fixing seat (3), ), the output end of the first working motor (6) passes through the side wall of the fixed seat (3) and is fixedly connected to one end of the first worm (7), and the first worm (7) is rotatably connected to the inside of the fixed seat (3), the inside of the fixed seat (3) is rotatably connected to the first worm wheel (8), and the first worm wheel (8) and the first worm (7) are engaged, and a rotating column (9) is fixedly installed on the first worm wheel (8), and one end of the rotating column (9) passes through the side wall of the fixed seat (3) and is fixedly connected to the center of the lower surface of the fixed plate (10); The spraying mechanism (4) further comprises: side plates (11), two side plates (11) being symmetrically fixedly mounted on both ends of the upper surface of the fixed plate (10), a rotating plate (12) being rotatably connected between the bottom ends of the two side plates (11), a fixed frame (13) being fixedly mounted on the center of the upper surface of the fixed plate (10), a second working motor (14) being fixedly mounted on one side of the fixed frame (13), an output end of the second working motor (14) passing through the side wall of the fixed frame (13) and connecting with the second worm gear. One end of the rod (15) is fixedly connected, and the second worm (15) is rotatably connected to the inner wall of the fixed frame (13). A second worm gear (16) is fixedly installed in the middle of the rotating plate (12), and the second worm gear (16) is engaged with the second worm (15). Guide rods (17) are fixedly installed at both ends of the rotating plate (12), and the guide rods (17) are slidably connected to the side plates (11). A high-pressure water gun assembly (32) is symmetrically fixedly installed on the upper surface of the fixed plate (10).

2. The high-pressure water gun device according to claim 1, characterized in that: A mounting groove is provided in the middle of the rotating plate (12) and is adapted to cooperate with the second worm gear (16).

3. The high-pressure water gun device according to claim 1, characterized in that: A limiting column (18) is symmetrically fixedly mounted on the upper surface of the fixing seat (3), and a sliding groove that slides with the limiting column (18) is provided on the surface of the fixing plate (10).

4. The high-pressure water gun device according to claim 1, characterized in that: The side plate (11) is provided with an arc-shaped groove that slides with the guide rod (17).

5. The high-pressure water gun device according to claim 1, characterized in that: The tensioning mechanism (5) comprises: a vertical rod (19), four of the vertical rods (19) are fixedly mounted on the upper surface of the base plate (1) in a rectangular shape, a mounting plate (20) is fixedly mounted on the top of the four vertical rods (19), a screw rod (21) is provided between the four vertical rods (19), and one end of the screw rod (21) is rotatably connected to the upper surface of the base plate (1), an end of the screw rod (21) away from the base plate (1) passes through the side wall of the mounting plate (20) and is fixedly connected to the lower surface of the rotating disk (22), and the screw rod (21) is rotatably connected to the mounting plate (20), a lifting plate (23) is slidably connected to the four vertical rods (19), and the lifting plate (23) is threadedly connected to the screw rod (21), and both ends of the lifting plate (23) are fixedly mounted with a fixing bar (24), and both ends of the fixing bar (24) are fixedly mounted. A first guide wheel (25) is rotatably connected, a second guide wheel (26) is provided below the first guide wheel (25), one end of the second guide wheel (26) is rotatably connected to one side of the mounting block (27), wherein two of the mounting blocks (27) are threadedly connected to the threaded rod (28), one end of the two threaded rods (28) passes through two of the mounting blocks (27) and is rotatably connected to the other two mounting blocks (27), one end of the threaded rod (28) is fixedly mounted with a hand wheel (29), both ends of the threaded rod (28) are rotatably connected to fixed blocks (30), and the fixed block (30) is fixedly connected to the upper surface of the base plate (1), a water pipe (31) is sleeved on the first guide wheel (25) and the second guide wheel (26), and one end of the water pipe (31) is fixedly connected to the water inlet end of the high-pressure water gun assembly (32).

6. The high-pressure water gun device according to claim 5, characterized in that: The bottom ends of the two mounting blocks (27) are provided with sliders, and the upper surface of the base plate (1) is symmetrically provided with sliding grooves that are slidably connected to the sliders at the bottom ends of the mounting blocks (27).

7. A method for clearing river silt using the high-pressure water gun device according to any one of claims 1 to 6, characterized in that: include: 1) Layout of abandoned mud area a. Selection of abandoned mud area The location of the abandoned mud area should not be too far from the operation site to facilitate ecological restoration. The distance for transportation should be selected according to the head of the mud pump; b. Clearing the abandoned mud area Remove surface corrosive soil and grass roots; c. Cofferdam filling in the abandoned mud area The height and slope of the cofferdam should be determined according to the actual situation; d. Renovation and restoration of abandoned mud areas After the mud hardens, spread wolfsbane seeds to restore vegetation. 2) Excavation of diversion channels a. Measurement and layout Before construction, use a total station and level to measure the original surface of the diversion channel and keep records. The measurement record book and the results will be submitted to the supervising engineer for review and signature approval. b. Excavation of diversion channels Excavators are used for excavation and slope cutting, and all earthwork is transported to the designated dumping area. During construction, excavation is carried out layer by layer from top to bottom according to the measured opening line, and the layer thickness is controlled at 2m to 3m; 3) Use high-pressure water guns and mud pumps to remove river silt. a. River cofferdam filling According to the construction river conditions, reasonable division is carried out to carry out cofferdam construction; The cofferdam filling is carried out in two steps: filling below the water and filling above the water. The cofferdam filling adopts the silt squeezing method. When filling the cofferdam, the upstream and downstream cofferdams are filled from the right side to the left side. Each site is equipped with a bulldozer, which is responsible for filling the earthwork within its own construction area. When the earthwork is closed, the earthwork is first transported to the cofferdam waiting area. After the earthwork is sufficient, the bulldozer is used to push it into the water. When the cofferdam is closed and the water fill is 80 cm above the river surface, it is compacted layer by layer with a roller to carry out water filling. The water fill is spread in layers, with each layer 25 cm thick and compacted layer by layer. b. Construction precipitation Use a sewage pump to pump out water, and after the water between the two cofferdams is pumped out, proceed with hydraulic excavation; c. Mud pipe layout The site, road and embankment with flat terrain and convenient transportation should be selected for layout, with smooth direction and short route, avoiding sharp bends and large ups and downs; d. River dredging The construction principle of hydraulic excavation is to simulate the principle of water scouring in nature, and to excavate the soil with the help of hydraulic action, that is, water flows through a high-pressure pump to generate pressure, and a dense high-speed water column is sprayed through the spraying mechanism (4) in the high-pressure water gun device to cut and crush the soil, making it wet and disintegrate, forming a mixture of silt and mud blocks, which is then sucked and transported to the mud disposal area by a vertical mud pump and its mud delivery pipe; The construction method of first slope and then depth is adopted. This method shortens the duration of water retention during construction, makes it easier to control the slope foot at the bottom angle line of the riverbed design, and reduces invalid earthwork. The overall principle is to start construction from the center of the block and gradually spread out to the surrounding areas, gradually forming a "pot bottom shape". During scouring, the construction working surface is cut horizontally. That is, the water gun operator stands in the middle and lower part of the river slope, with the gun head about 1.5m away from the working surface, and quickly cuts horizontally. The concentrated water flow and the potential energy of the river slope are used to quickly make the mud blocks enter the mud suction pump; During the construction process, the excavation should be carried out in layers. At the same time, the construction workers and professional surveyors should conduct measurements in time to strictly control the construction quality. If the mud pump impeller is blocked and debris must be removed, the mud pump water level must be kept above 1m. A dedicated person must cut off the power supply and supervise it. After the removal is completed, the power will be restored by a dedicated person to avoid safety accidents. The water for excavation in the initial construction starting from the section should be drawn from the upstream. Desilting steps: First, the construction preparation work is carried out, including the selection of the layout location of the mud disposal area, the direction of the diversion channel, the division of the river channel desilting construction section, and the selection of construction equipment; According to the on-site layout, start excavation of the waste mud area, diversion channel, and construction of river cofferdam; After the diversion channel is completed, diversion is carried out, that is, the water in the river is diverted into the diversion channel, and the water level in the river begins to drop until the silt is exposed; Enter the river manually, use high-pressure water guns to cut and crush the silt, and use mud pumps to suck the crushed silt into the waste mud area; After dredging is completed, the water level in the river will be restored, and grass seeds will be sown in the abandoned mud area to restore the ecology.

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