Method for arranging multi-layer antifouling curtain cloth in open water area

Abstract

The invention provides an open water area multi-layer antifouling curtain arrangement method, and belongs to the technical field of dredging engineering environmental protection, and the method comprises the following steps: S10, arranging a single-layer light antifouling curtain on the outer side of a coastal construction area of land area equipment; s20, a double-layer heavy antifouling curtain is arranged on the periphery of the construction area of the cutter suction dredger; s30, a secondary sedimentation tank, an overflow dam and a drainage box culvert are arranged in the hydraulic reclamation area; s40, a plurality of barrages are arranged on the drainage channel to slow down the flow speed; s50, three layers of heavy antifouling curtains are arranged at the tail water estuary to serve as the last defense line; the arrangement method of the multi-layer anti-fouling curtain in the open water area further comprises an anchoring installation method of the anti-fouling curtain. The anti-fouling curtain installation method is optimized, the stability of the curtain in the open sea area is improved, meanwhile, the anti-fouling curtain installation method is flexibly combined, the construction suspended matter concentration of the open sea area is reduced to the maximum extent, and water quality pollution to the peripheral ecological habitat and the surrounding sea area is isolated as much as possible.

Description

Technical Field

[0001] The present invention relates to the field of environmental protection technology for dredging projects, and specifically to a method for laying multi-layer anti-fouling curtains in open waters. The method is suitable for dredging and backfilling projects with open construction waters, close operating areas to ecological habitats, and extremely strict environmental protection requirements. Background Art

[0002] Anti-pollution curtain is a device used to prevent the spread of pollutants. It is used to isolate suspended matter, oil, mud and other pollutants in water bodies to prevent such pollutants from spreading to clean areas. The main application scenarios include: water construction: such as bridge and dock construction, to prevent the spread of mud and sand; oil pollution treatment: cooperate with oil suction equipment for cleaning, used to intercept oil pollution on the water surface; environmental protection: prevent pollutants from entering drinking water sources or ecologically sensitive areas.

[0003] In current dredging projects, especially those in open waters, there's a pressing need to flexibly combine and optimize anti-fouling curtain deployment methods to effectively reduce the spread of suspended solids during construction and protect the surrounding ecological environment. Traditional single-layer curtain anti-fouling measures are often ineffective and struggle to meet the extremely stringent environmental requirements for TSS concentrations and turbidity in offshore projects. Summary of the Invention

[0004] The present invention provides a method for laying multi-layer anti-fouling curtains in open waters, which increases the stability of the curtains in open waters. At the same time, the anti-fouling curtain laying methods are flexibly combined to minimize the concentration of construction suspended matter in open waters, thereby isolating the surrounding ecological habitats and the water quality of the surrounding sea areas from pollution as much as possible.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] A method for laying multi-layer anti-fouling curtains in open waters, comprising the following steps:

[0007] S10: Deploy a single layer of light anti-fouling curtain outside the seaward construction area of land-based equipment;

[0008] S20: Deploy double-layer heavy-duty anti-fouling curtains outside the cutter suction vessel construction area;

[0009] S30: Set up a secondary sedimentation tank, overflow dam and drainage box culvert in the reclamation area;

[0010] S40: Multiple dams are installed on the drainage channel to slow down the flow;

[0011] S50: Three layers of heavy-duty anti-fouling curtains are installed at the tailwater inlet as the last line of defense.

[0012] Preferably, the method for laying out the multi-layer anti-fouling curtain in open waters further includes a method for anchoring and installing the anti-fouling curtain, and the method for anchoring and installing the anti-fouling curtain includes:

[0013] S01: The anti-fouling curtain is connected to the anchor buoy through an anchor cable;

[0014] S02: The anchor cable below the anchor buoy is connected to the ground anchor through a steel anchor chain, and a hook with a shackle is used at the node to ensure the firmness of the connection;

[0015] S03: The above-water position of the ground anchor is marked by a sling buoy, and a lifting sling is connected between the ground anchor and the sling buoy.

[0016] Preferably, the anchor connection points in the anti-fouling curtain anchor installation method should be made of HDG thick steel plates with a thickness of not less than 6 mm and a tensile strength of not less than 115 kN to ensure that the system always remains in place and avoids disconnection.

[0017] Preferably, the anchor steel in the anti-fouling curtain anchoring installation method is HDG steel.

[0018] Preferably, the anchor buoy includes a float, a lower mast arranged on the top of the float, an upper mast arranged on the top of the lower mast, and a propulsion mechanism arranged in a chamber at the bottom of the float.

[0019] Preferably, the propulsion mechanism includes a power assembly arranged on the bottom wall of the floating body, a vertical movement assembly arranged at the output end of the power assembly and capable of axial displacement along the floating body, and a propeller arranged on the vertical movement assembly.

[0020] Preferably, the power assembly includes a power motor, a first coupling arranged at the output end of the power motor, a screw rod arranged at the output end of the first coupling and arranged vertically, and a screw rod nut spirally arranged on the screw rod.

[0021] Preferably, the vertical movement assembly includes a bracket fixed to the side wall of the screw nut and a propulsion motor arranged on the bracket, and the propeller is a propeller blade arranged at the output end of the propulsion motor through a second coupling.

[0022] Preferably, the anchor buoy also includes a steering mechanism arranged on the side wall of the propulsion motor, and the steering mechanism includes a mounting frame fixedly arranged on the side wall of the bracket, a guide ring coaxially arranged with the axis of the propulsion motor, a gear ring fixed on the inner side of the guide ring, a steering motor fixedly arranged on the side wall of the propulsion motor, and a driving gear arranged at the output end of the steering motor and meshing with the gear ring.

[0023] Preferably, a mounting ring is fixedly provided on the outer wall of the steering motor, a connecting rod is fixedly provided on the mounting ring, and a circumferentially distributed guide groove is opened on the outer wall of the guide ring, and the end of the connecting rod away from the mounting ring can be slidably set in the guide groove.

[0024] It can be seen from the above technical solutions that the present invention has the following beneficial effects:

[0025] 1. In the present invention, the installation method of the anti-fouling curtain is optimized to increase the stability of the curtain in the open sea. At the same time, the anti-fouling curtain deployment method is flexibly combined to minimize the concentration of suspended solids in the open water during construction, thereby isolating the surrounding ecological habitat and the water quality of the surrounding sea area from pollution as much as possible.

[0026] 2. In the present invention, a propulsion mechanism is provided at the bottom of the floating body. When the anchor buoy needs to be deployed and recovered, the propeller located at the bottom of the floating body can be released downward by using the power assembly. After the propeller is located at a certain position underwater, the propeller is actuated to drive the floating body to move in the sea area to achieve the purpose of deployment and recovery. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of the present invention;

[0028] Figure 2 It is a structural schematic diagram of the present invention including a propulsion mechanism;

[0029] Figure 3 It is a structural diagram of the propulsion mechanism;

[0030] Figure 4 for Figure 3 Schematic diagram of the structure with the power components removed;

[0031] Figure 5 for Figure 4 A partial enlarged view of part A;

[0032] Figure 6 for Figure 4 Structural diagram from another side perspective;

[0033] Figure 7 for Figure 6 A partial enlarged view of part B;

[0034] Figure 8 This is a flow chart of the deployment method provided by the present invention.

[0035] In the figure: 10, floating body; 20, lower mast; 30, upper mast; 40, propulsion mechanism; 411, power motor; 412, first coupling; 413, screw; 414, screw nut; 421, bracket; 422, propulsion motor; 423, second coupling; 424, transmission shaft; 430, propeller; 510, mounting frame; 520, guide ring; 521, guide groove; 530, gear ring; 540, steering motor; 541, mounting ring; 542, connecting rod; 550, driving gear. DETAILED DESCRIPTION

[0036] A preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

[0037] The type of anti-fouling curtain should be selected according to the environmental conditions of the water area surrounding the construction site.

[0038] To achieve the above objectives, the embodiments of the present invention adopt the following technical solutions: Figure 8 A method for laying multi-layer anti-fouling curtains in open waters comprises the following steps:

[0039] S10: Lay out a single layer of light anti-fouling curtain outside the seaward construction area of land-based equipment.

[0040] Specifically, a single layer of light anti-fouling curtain is laid outside the seaside construction area of land-based equipment to preliminarily block the spread of suspended matter generated by construction.

[0041] S20: Lay out double-layer heavy-duty anti-fouling curtains outside the cutter suction vessel construction area.

[0042] Specifically, a double layer of heavy-duty anti-fouling curtains, with a spacing of no more than 50m between layers, is deployed around the cutter suction vessel's construction area to further enhance anti-fouling effectiveness. The heavy-duty anti-fouling curtains are designed to effectively withstand strong water flow impacts, ensuring effective anti-fouling performance.

[0043] S30: A secondary sedimentation tank, overflow dam and drainage box culvert will be set up in the reclamation area.

[0044] Specifically, in order to improve the environmental protection interception system of the tailwater estuary, by setting up a secondary sedimentation tank, overflow dam and drainage culvert in the reclamation area, multi-stage sedimentation and buffering can be used to reduce the entry of suspended matter into the drainage channel.

[0045] S40: Multiple dams are installed on the drainage channel to slow down the flow.

[0046] Specifically, by setting up multiple dams on the drainage channel to slow down the flow rate, suspended matter has more opportunities to settle and the possibility of it spreading with the water flow is reduced.

[0047] S50: Three layers of heavy-duty anti-fouling curtains are installed at the tailwater inlet as the last line of defense.

[0048] Specifically, three layers of heavy-duty anti-fouling curtains are set up at the tailwater inlet, with the layer spacing between the three layers of heavy-duty anti-fouling curtains being 20 to 30 meters. The three layers of heavy-duty anti-fouling curtains serve as the last line of defense to ensure that the concentration of suspended matter is reduced to a minimum.

[0049] As a preferred technical solution of this embodiment, in order to optimize the anchoring and installation effect of the anti-fouling curtain, the installation and deployment of the anti-fouling curtain needs to be combined with the concrete anchoring method for positioning. Therefore, the method for deploying multi-layer anti-fouling curtains in open waters also includes an anti-fouling curtain anchoring and installation method, which includes:

[0050] S01: The anti-fouling curtain is connected to the anchor buoy through an anchor cable.

[0051] Specifically, the anti-fouling curtain and the anchor buoy are connected by an anchor cable, and the connection length can be adjusted according to actual needs.

[0052] S02: The anchor cable below the anchor buoy is connected to the ground anchor through a steel anchor chain, and a hook with a shackle is used at the node to ensure the firmness of the connection.

[0053] Specifically, by connecting the anchor cable under the anchor buoy with the ground anchor through a steel anchor chain, and using a hook lock with a shackle at the node, on the one hand, the stability of the connection between the anchor buoy and the ground anchor can be improved, and on the other hand, the detachable connection form also has the advantage of convenient installation.

[0054] S03: The above-water position of the ground anchor is marked by a sling buoy, and a lifting sling is connected between the ground anchor and the sling buoy.

[0055] Specifically, the above-water position of the ground anchor is marked using a sling buoy to facilitate daily maintenance and inspection.

[0056] Furthermore, to ensure safety and accuracy during installation, lifting slings may be used to connect the components.

[0057] Furthermore, HDG thick steel plates with a thickness of not less than 6 mm and a tensile strength of not less than 115 kN should be used for anchor connection points to ensure that the system always remains in place and avoids disconnection.

[0058] At the same time, all anchor steel should be HDG steel or equivalent. For sandy seabed and water flow less than 0.4m / s, Danforth anchors should be used.

[0059] This invention optimizes the installation method of the anti-fouling curtain, increasing its stability in open waters. It also offers flexible combinations of deployment methods to minimize suspended solids concentration in open waters during construction, minimizing pollution to surrounding ecological habitats and the surrounding sea. This effectively meets the Red Sea owner's extremely stringent environmental requirements for TSS concentration and turbidity near the sea, avoiding substantial environmental fines.

[0060] Reference Figure 1 、 Figure 2In some embodiments, the anchor buoy includes a float 10, a lower mast 20, an upper mast 30 and a propulsion mechanism 40. The lower mast 20 is fixedly arranged on the top of the float, the upper mast 30 is fixedly arranged on the top of the lower mast, and the propulsion mechanism 40 is arranged in the bottom chamber of the float.

[0061] Further, refer to Figure 3 Since existing anchor buoys are equipped with a variety of components for data detection, these components require regular maintenance, including cleaning, calibration, and repair. Most existing anchor buoys are unpowered, so deployment and recovery require the use of specialized equipment and personnel. This can adversely affect operational and maintenance costs in complex sea conditions and construction environments. To this end, the propulsion mechanism 40 in the anchor buoy of this embodiment includes a power assembly, a vertical displacement assembly, and a thruster 430. The power assembly is disposed on the bottom wall of the float 10, and the vertical displacement assembly is disposed at the output end of the power assembly. The vertical displacement assembly is capable of axial displacement along the float 10, and the thruster 430 is disposed on the vertical displacement assembly. During use, when the anchor buoy needs to be deployed or recovered, the power assembly can be used to release the thruster located at the bottom of the float downward. Once the thruster is at a certain underwater position, the thruster actuates to drive the float to move within the sea area, thereby achieving the purpose of deployment and recovery.

[0062] Furthermore, the power assembly includes a power motor 411, a first coupling 412, a screw rod 413 and a screw nut 414. The first coupling 412 is arranged at the output end of the power motor 411, the screw rod 413 is arranged at the output end of the first coupling 412, and the first coupling 412 is arranged vertically. The screw nut 414 is spirally arranged on the screw rod, wherein the vertical movement assembly is fixedly arranged on the side wall of the screw rod nut. In this way, when in use, the power motor is operated to transmit power to the screw rod through the first coupling, and the screw rod then drives the screw rod nut to move axially on its outer wall, thereby achieving the purpose of driving the vertical movement assembly and the propeller to move vertically, so as to release and recover the propeller.

[0063] Further, refer to Figure 4 、 Figure 6 The vertical movement assembly includes a bracket 421 and a propulsion motor 422. The bracket 421 is fixedly set on the side wall of the screw nut 414, and the propulsion motor 422 is set on the bracket. The propeller 430 is a propeller blade set at the output end of the propulsion motor 422 through the second coupling 423. When in use, when the bracket moves along the axial direction of the screw as the screw nut moves along the screw, it can synchronously drive the propeller to move.

[0064] Further, refer to Figure 5 、 Figure 7In order to change the driving direction of the propeller to realize the steering of the anchor buoy, the anchor buoy also includes a steering mechanism arranged on the side wall of the propulsion motor 422, and the steering mechanism includes a mounting frame 510, a guide ring 520, a gear ring 530, a steering motor 540 and a driving gear 550. The mounting frame 510 is fixedly arranged on the side wall of the bracket 421, the guide ring 520 is coaxially arranged with the axis of the propulsion motor 422, the gear ring 530 is fixed on the inner side of the guide ring, the steering motor 540 is fixedly arranged on the side wall of the propulsion motor 422, and the driving gear 550 is fixedly arranged on the inner side of the guide ring. It is arranged at the output end of the steering motor, and the driving gear 550 is engaged with the gear ring 530. When in use, the rotating motor drives the driving gear to rotate. Since the driving gear is engaged with the gear ring, and since the guide ring is fixed on the mounting frame, when the driving gear rotates, it will drive the steering motor to slide along the inner wall of the guide ring. Since the steering motor is fixed to the propulsion motor, when the steering motor slides along the inner side of the guide ring, it will synchronously drive the propulsion motor to move, thereby adjusting the propulsion direction of the propeller at the output end of the propulsion motor to change the moving direction of the anchor buoy.

[0065] The reason why the guide ring 520 is arranged coaxially with the axis of the propulsion motor 422 is because the driving gear rotates along the gear ring, and the driving gear rotates along the center of the inner part of the guide ring. In this way, the propulsion motor can realize the rotation of the propeller along the center of the inner part of the guide ring during the following process.

[0066] Further, refer to Figure 3 、 Figure 4 、 Figure 6 In order to improve the stability of the steering movement of the propulsion motor 422, a transmission shaft 424 is provided between it and the bracket 421. The two ends of the transmission shaft 424 are respectively connected to the propulsion motor 422 and the bracket 421 through bearings. In this way, when the propulsion motor rotates along the inner side of the guide ring with the driving gear, the propulsion motor can be rotated along the transmission shaft.

[0067] In some embodiments, reference Figure 7 In order to improve the stability of the steering motor, propulsion motor and propeller moving along the guide ring, a mounting ring 541 is fixedly provided on the outer wall of the steering motor 540, and a connecting rod 542 is fixed on the mounting ring. The outer wall of the guide ring 520 is provided with a circumferentially distributed guide groove 521, and the end of the connecting rod 542 away from the mounting ring can be slidably set in the guide groove 521. In this way, when the steering motor, propulsion motor and propeller rotate, the connecting rod can be synchronously driven to rotate along the guide groove, so as to improve the stability of the rotation process of the entire steering mechanism.

[0068] The above-described embodiments are merely descriptions of preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should fall within the scope of protection determined by the claims of the present invention.

Claims

1. A method for laying multi-layer anti-fouling curtains in open waters, characterized in that: The following steps are involved: S10: Deploy a single layer of light anti-fouling curtain outside the seaward construction area of land-based equipment; S20: Deploy double-layer heavy-duty anti-fouling curtains outside the cutter suction vessel construction area; S30: Set up a secondary sedimentation tank, overflow dam and drainage box culvert in the reclamation area; S40: Multiple dams are installed on the drainage channel to slow down the flow; S50: Three layers of heavy-duty anti-fouling curtains are installed at the tailwater inlet as the last line of defense.

2. The method for laying multi-layer anti-fouling curtains in open waters according to claim 1, characterized in that: The method for laying multi-layer anti-fouling curtains in open waters also includes a method for anchoring and installing the anti-fouling curtains, which includes: S01: The anti-fouling curtain is connected to the anchor buoy through an anchor cable; S02: The anchor cable below the anchor buoy is connected to the ground anchor through a steel anchor chain, and a hook with a shackle is used at the node to ensure the firmness of the connection; S03: The above-water position of the ground anchor is marked by a sling buoy, and a lifting sling is connected between the ground anchor and the sling buoy.

3. The method for laying multi-layer anti-fouling curtains in open waters according to claim 2, characterized in that: The anchor connection points in the anti-fouling curtain anchor installation method should be made of HDG thick steel plates with a thickness of not less than 6mm and a tensile strength of not less than 115kN to ensure that the system always remains in place and avoids disconnection.

4. The method for laying multi-layer anti-fouling curtains in open waters according to claim 3, characterized in that: The anchor steel in the anti-fouling curtain anchoring installation method is HDG steel.

5. The method for laying multi-layer anti-fouling curtains in open waters according to claim 2, characterized in that: The anchor buoy comprises a float (10), a lower mast (20) arranged on the top of the float, an upper mast (30) arranged on the top of the lower mast, and a propulsion mechanism (40) arranged in a chamber at the bottom of the float.

6. The method for laying multi-layer anti-fouling curtains in open waters according to claim 5, characterized in that: The propulsion mechanism (40) comprises a power assembly arranged on the bottom wall of the floating body (10), a vertical movement assembly arranged at the output end of the power assembly and capable of axial displacement along the floating body (10), and a propeller (430) arranged on the vertical movement assembly.

7. The method for laying multi-layer anti-fouling curtains in open waters according to claim 6, characterized in that: The power assembly comprises a power motor (411), a first coupling (412) arranged at the output end of the power motor (411), a vertically arranged screw rod (413) arranged at the output end of the first coupling (412), and a screw rod nut (414) spirally arranged on the screw rod.

8. The method for laying multi-layer anti-fouling curtains in open waters according to claim 7, characterized in that: The vertical movement assembly includes a bracket (421) fixed to the side wall of the screw nut (414) and a propulsion motor (422) arranged on the bracket, and the propeller (430) is a propeller blade arranged at the output end of the propulsion motor (422) through a second coupling (423).

9. The method for laying multi-layer anti-fouling curtains in open waters according to claim 8, characterized in that: The anchor buoy further comprises a steering mechanism arranged on the side wall of the propulsion motor (422), the steering mechanism comprising a mounting frame (510) fixedly arranged on the side wall of the bracket (421), a guide ring (520) coaxially arranged with the axis of the propulsion motor (422), a gear ring (530) fixedly arranged on the inner side of the guide ring, a steering motor (540) fixedly arranged on the side wall of the propulsion motor (422), and a driving gear (550) arranged at the output end of the steering motor and meshing with the gear ring (530).

10. The method for laying multi-layer anti-fouling curtains in open waters according to claim 9, characterized in that: The outer wall of the steering motor (540) is fixedly provided with a mounting ring (541), the mounting ring is fixedly provided with a connecting rod (542), the outer wall of the guide ring (520) is provided with circumferentially distributed guide grooves (521), and the end of the connecting rod (542) away from the mounting ring can be slidably arranged in the guide groove (521).

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