Cutter suction and hydraulic reclamation integrated construction method for reef sand mold bag wave wall revetment

Abstract

The invention belongs to the technical field of reef sand mold bag wave walls, and particularly relates to a reef sand mold bag wave wall revetment cutter suction and hydraulic reclamation integrated construction method which comprises a cutter suction dredger body, a cutter suction dredger bow is arranged at the right end of the cutter suction dredger body, and a cutter suction dredger reamer is installed at the lower end of the cutter suction dredger bow; local reef sand is used as a natural harmless filling material, the cost of outward transportation materials is reduced, the degradable synthetic fiber mold bag has good water permeability and integrity, a cutter suction dredger blows and fills the reef sand to rapidly form a firm protective layer on a shore section needing to be protected, the anti-scouring capacity of the coastline is enhanced through reef sand filling, and the service life of the coastline is prolonged. Erosion of water flow, stormy waves and sea tides to the embankment is prevented, the overall stability of the revetment is improved, the protection effect is further enhanced through combination of the reef sand and the mold bags, and the construction steps are simplified to reduce the construction difficulty; by means of the cutter suction and hydraulic reclamation integrated construction method for the reef sand mold bag wave wall revetment, the problems that according to an existing construction method, construction is tedious, the difficulty is large, the cost input is high, and the environment is prone to being polluted are solved.

Description

Technical Field

[0001] The invention belongs to the technical field of reef sand mold bag wave-breaking walls, and in particular relates to a reef sand mold bag wave-breaking wall revetment cutter suction blowing filling integrated construction method. Background Art

[0002] The mold bag is a bag made of degradable synthetic fiber, which has good water permeability and sand impermeability. At present, the mold bag revetment generally adopts reinforced concrete mold bag revetment, which has the following disadvantages: 1. The traditional revetment is a reinforced concrete retaining wall revetment. The foundation construction is affected by the tide and requires long-term drainage. The construction is difficult, the cycle is long, and the cost is high. At the same time, anti-corrosion steel bars and concrete are required to increase the service life of the concrete retaining wall, and the engineering traces are obvious; 2. The construction process causes varying degrees of damage and pollution to the nearby sea area, making the original sparsely vegetated ecological environment worse. At the same time, the concrete hard structure revetment cannot provide space for coastal biodiversity, which is not conducive to coastal ecological construction, and the impact caused is immeasurable; 3. During the construction process in the coastal area, material transportation is more difficult and the cost investment is high. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the defects of the prior art. By using an integrated construction method of reef sand mold bag wave-breaking wall and bank protection by suction and blowing, the problems of the existing construction method, such as complicated construction, great difficulty, high cost investment and easy environmental pollution, are solved.

[0004] The technical solution adopted by the present invention to solve the technical problem is: an integrated construction method of reef sand mold bag wave-breaking wall revetment suction and filling, including a suction dredging vessel hull:

[0005] The right end of the hull of the dredging vessel is provided with a dredging vessel bow, and a dredging vessel cutter is installed at the lower end of the dredging vessel bow, and the right end of the dredging vessel cutter is tilted downward by about 30-60 degrees; the left end of the hull of the dredging vessel is connected to a 377mm diameter PVC wear-resistant pipe through a flange, and a conversion head is installed at the left end of the 377mm diameter PVC wear-resistant pipe, and a plurality of 150mm diameter rubber pipes scattered in an arc shape are connected to the upper side of the left end of the conversion head through a flange;

[0006] A reef sand mold bag wave-breaking wall revetment integrated construction method comprises the following steps: driving the hull of the dredging suction boat to the water surface of the sea area close to one side of the coastline, maintaining a distance between the dredging suction boat and the coastline equal to the length of a 377mm diameter PVC wear-resistant pipe, the left end of the 377mm diameter PVC wear-resistant pipe is close to the edge of the coastline, and the adapter is placed on the coastline. The adapter assembles a 150mm diameter rubber pipe and a 377mm diameter PVC wear-resistant pipe into one body to form a passage, placing a mold bag on the coastline, the mold bag is close to the left side of the adapter and is placed below a plurality of 150mm diameter rubber pipes, the bow of the dredging suction boat is horizontally supported with the hull of the dredging suction boat as the reference surface, tilted downward at an angle of about 30-60 degrees to the sea, and extends into the dredging suction boat cutter, the dredging suction boat cutter crushes and sucks the reef sand in the sea, and the dredging suction boat hull has a built-in centrifugal pump to transfer the reef sand crushed by the dredging suction boat cutter to the inside of the 377mm diameter PVC wear-resistant pipe, and relies on the 377mm diameter PVC wear-resistant pipe to pass through the dredging suction boat. The reef sand is transported to the adapter by PVC wear-resistant pipes. The reef sand is transported to different positions on the surface of the mold bag through multiple 150mm diameter rubber pipes inside the adapter. The mold bag shapes the reef sand, and the reef sand is concentrated on the mold bag to form a wave-breaking wall for the coastline revetment. After every other layer of mold bag is fully laid on the coastline, the amount of reef sand accumulation increases. With each additional layer of reef sand, the circumference of each additional mold bag gradually shrinks. The cross-section of the reef sand and the mold bag presents a trapezoidal-shaped revetment retaining wall on the coastline.

[0007] In a preferred technical solution of the present invention, a mold bag installed on the left end of the conversion head is provided below the 150 mm diameter rubber tube, a coastline is provided on the lower side of the left end of the conversion head, the mold bag is placed on the coastline, and the coastline provides a horizontal placement plane for the mold bag.

[0008] In a preferred technical solution of the present invention, a plurality of sand inlets are provided at the upper end of the mold bag, and the plurality of sand inlets are respectively connected to the interior of the adjacent 150mm diameter rubber tubes, and the lower ends of a plurality of 150mm diameter rubber tubes are directly connected to the corresponding plurality of sand inlets. The reef sand is evenly injected into the mold bag through the corresponding sand inlets along the plurality of 150mm diameter rubber tubes. When the reef sand fills the interior of the mold bag, the 150mm diameter rubber tubes are withdrawn from the sand inlets, and the sand inlets are closed. The mold bag provides a molding template for the reef sand, and the shape of the reef sand after molding is consistent with the shape of the mold bag.

[0009] Compared with the prior art, the present invention has the following beneficial effects:

[0010] The biodegradable synthetic fiber reef sand mold bag blowing and filling revetment process is a comprehensive construction method that combines the suction boat blowing and filling technology with the mold bag revetment project. The beneficial effects it brings are mainly reflected in the following aspects:

[0011] 1. Improve the stability of the bank protection: by using suction dredgers to fill reef sand, a solid protective layer can be quickly formed on the shore section that needs protection. The filling of reef sand enhances the coastline's ability to resist scour, effectively preventing the erosion of the bank by water flow, wind and waves, and tides, thereby improving the overall stability of the bank protection;

[0012] 2. Enhanced protection effect: The mold bag revetment material uses a degradable synthetic fiber mold bag. This structure not only has good water permeability and integrity, but also can effectively disperse the impact of water flow and reduce direct scouring of the bank. The combination of reef sand and mold bags further enhances the protection effect and extends the service life of the revetment;

[0013] 3. High construction efficiency: The construction process of the suction dredger blowing and filling reef sand bag revetment is relatively simple and can quickly respond to engineering needs. The suction dredger can directly suck up the reef sand on the seabed and transport it to the designated location, and then form a protective layer through the bag pouring technology, simplifying the construction steps to reduce the construction difficulty and greatly improving the construction efficiency;

[0014] 4. Cost saving: Using local reef sand as filling material reduces the cost of transporting materials. At the same time, compared with traditional hard revetment structures (such as concrete walls), the mold bag revetment technology has lower construction costs and shorter construction periods, thus achieving cost savings;

[0015] 5. Environmental protection and sustainability: The construction process of the suction dredger blowing and filling reef sand bag revetment has little impact on the environment. As a natural material, reef sand produces less waste during its mining and use. In addition, the bag revetment structure has good water permeability and ecological compatibility, which is conducive to the growth and reproduction of aquatic organisms, promotes the sustainable development of the ecological environment, and conforms to the contemporary concept of "energy saving, consumption reduction, low carbon and environmental protection". BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is the overall blowing and filling construction effect diagram of the present invention;

[0017] Figure 2 It is a partial enlarged view of structure A of the present invention;

[0018] Figure 3 This is a partial enlarged view of structure B of the present invention:

[0019] Figure 4 It is a schematic diagram of the cross-section of the mold bag revetment of the present invention;

[0020] Figure 5 It is a front view of the mold bag revetment of the present invention;

[0021] Figure 6 This is a rendering of the construction process of the mold bag suction blowing filling stacking of the present invention;

[0022] Figure 7It is a partial enlarged view of structure C of the present invention.

[0023] In the figure: 1. Hull of the cutter suction dredge; 2. Bow of the cutter suction dredge; 3. Cutter blade of the cutter suction dredge; 4. PVC wear-resistant pipe with a diameter of 377mm; 5. Coastline; 6. Conversion head; 7. Rubber tube with a diameter of 150mm; 8. Sand inlet; 9. Mould bag. DETAILED DESCRIPTION

[0024] See also Figure 1-7 The present invention provides a technical solution: a reef sand mold bag wave-breaking wall revetment integrated construction method, comprising a dredging vessel hull 1, a dredging vessel bow 2 is arranged at the right end of the dredging vessel hull 1, a dredging vessel cutter 3 is installed at the lower end of the dredging vessel bow 2, and the right end of the dredging vessel cutter 3 is tilted downward by about 30-60 degrees; a 377mm diameter PVC wear-resistant pipe 4 is connected to the left end of the dredging vessel hull 1 through a flange, a conversion head 6 is installed at the left end of the 377mm diameter PVC wear-resistant pipe 4, and a plurality of arc-shaped scattered rubber pipes 7 with a diameter of 150mm are connected to the upper side of the left end of the conversion head 6 through a flange;

[0025] The dredging vessel 1 is driven to the surface of the sea area close to the coastline 5. A 377mm diameter PVC wear-resistant pipe and a 150mm diameter rubber pipe are used as sand transport pipes on the dredging vessel hull. The 377mm diameter PVC wear-resistant pipe is pre-laid between the side close to the coastline 5 and the stern of the dredging vessel hull 1. The right end of the 377mm diameter PVC wear-resistant pipe is firmly connected to the stern of the dredging vessel hull 1 with a flange. The distance between the dredging vessel and the coastline 5 is kept equal to the length of the 377mm diameter PVC wear-resistant pipe 4. The left end of the 377mm diameter PVC wear-resistant pipe 4 is close to the edge of the coastline 5. The adapter is placed on the coastline 5. The adapter connects the 150mm diameter rubber pipe 7 and the 377mm diameter The PVC wear-resistant pipe 4 is assembled into one body to form a passage, and a mold bag 9 is placed on the coastline 5. The mold bag 9 is close to the left side of the adapter and placed below a plurality of 150mm diameter rubber tubes 7. The bow 2 of the dredging vessel is horizontally supported by the hull 1 of the dredging vessel and tilted downward at an angle of about 30-60 degrees toward the sea, and extends into the dredging vessel cutter 3. The dredging vessel cutter 3 crushes and sucks the reef sand in the sea. The hull 1 of the dredging vessel has a built-in centrifugal pump to transfer the reef sand crushed by the dredging vessel cutter 3 to the inside of the 377mm diameter PVC wear-resistant pipe 4, and the reef sand is transported to the adapter by means of the 377mm diameter PVC wear-resistant pipe 4. The reef sand is transported to the adapter through a plurality of 150mm diameter rubber tubes 7 inside the adapter. A mold bag 9 installed on the left end of the conversion head 6 is arranged below the 150mm diameter rubber tube 7, and a coastline 5 is arranged on the lower side of the left end of the conversion head 6. The mold bag 9 is placed on the coastline 5, and the coastline 5 provides a horizontal placement plane for the mold bag 9.

[0026] A plurality of sand inlets 8 are provided at the upper end of the mold bag 9, and the plurality of sand inlets 8 are respectively connected to the interior of adjacent 150 mm diameter rubber tubes 7, and the lower ends of a plurality of 150 mm diameter rubber tubes 7 are directly connected to the corresponding plurality of sand inlets 8. The reef sand is evenly injected into the mold bag 9 through the corresponding sand inlets 8 along the plurality of 150 mm diameter rubber tubes 7. The reef sand fills the interior of the mold bag 9, and the 150 mm diameter rubber tubes 7 are withdrawn from the sand inlet 8, and the sand inlet 8 is closed. The mold bag 9 provides a molding template for the reef sand, and the shape of the reef sand after molding is consistent with the shape of the mold bag 9.

[0027] The mold bags 9 shape the reef sand, and the reef sand is concentrated and piled on the mold bags 9 to form a wave-breaking wall for protecting the coastline 5. After every other layer of mold bags 9 is fully laid on the coastline 5, the number of mold bags 9 increases as the amount of reef sand accumulation increases. With each additional layer of reef sand, the circumference of each additional layer of mold bags 9 gradually shrinks, and the cross-section of the reef sand and the mold bags 9 presents a trapezoidal-shaped revetment retaining wall on the coastline 5.

[0028] The degradable synthetic fiber reef sand mold bag wave-blocking wall revetment is arranged on the temporary coastal side to resist the impact of the tide on the revetment, so as to protect the temporary construction; the revetment of the mold bag 9 adopts the suction boat to suck the reef sand, and the fixed mold bag 9 is laid manually, and the reef sand is blown into the mold bag 9 through the 377mm diameter PVC wear-resistant pipe 4. Each section of the mold bag 9 is provided with 3 to 7 sand inlets 8 to make the reef sand blown and filled evenly. The height of the revetment of the mold bag 9 is determined according to the height of the tide, and the height of the mold bag 9 is 1 to 1.5 meters higher than the high tide. The final shape of the revetment of the mold bag 9 is controlled to be a trapezoid, with a wide lower layer and a narrow upper layer, shrinking layer by layer, and shrinking 1 meter at both ends of each layer of the mold bag 9, and each layer is staggered, so as to increase the stability of the revetment of the reef sand mold bag 9. The revetment foundation of the reef sand mold bag 9 is simple and convenient to construct, which can not only meet the requirements of resisting the scouring of waves and ensuring the overall safety of the temporary construction area, but also adapt to the deformation of the foundation settlement, and provide convenient conditions for the growth of marine organisms and maintain the natural ecological environment. At the same time, the biodegradable synthetic fiber reef sand mold bag 9 has high strength, good elongation, large deformation modulus, acid and alkali resistance, corrosion resistance, aging resistance, good hydrolysis resistance and wet mechanical properties, and is resistant to ultraviolet radiation and high temperature when exposed to sunlight.

[0029] Working principle:

[0030] The use of a suction dredger to dredge the reef sand mainly relies on the rotating auger, sand suction pipe and centrifugal pump of the suction dredger. First, the suction head is placed on the bottom of the water, and the underwater reef sand is loosened by rotating the auger at the front end of the bow. Then, the negative pressure suction generated by the centrifugal pump is used to suck the reef sand, pressurize it and transport it to the designated area, i.e., the location of the mold bag 9, through the sand transport pipeline. During the process, rotation and lifting operations need to be used to adjust according to the excavation needs. An adapter is installed at the end of the PVC wear-resistant pipe of the suction dredger. The main purpose is to increase the sand outlet so that the reef sand can be evenly discharged at different positions in the mold bag 9. The joint is installed with a 150mm diameter rubber tube 7, which is connected to the sand inlet 8 of the mold bag 9 to transport the reef sand into the mold bag 9. The mold bag 9 is a bag made of degradable synthetic fiber, which has good water permeability and sand impermeability. When the reef sand is sent to the mold bag 9 through the sand conveying pipe, the water in the reef sand will gradually seep out through the water-permeable layer of the mold bag 9, while the reef sand will be left in the mold bag 9 to gradually settle and consolidate. As the reef sand is deposited in the mold bag 9, the reef sand particles gradually lose moisture and stick to each other, forming a solid revetment structure with a certain strength, which can effectively resist the erosion of natural forces such as water flow, wind and waves, and protect the stability and safety of the revetment. During the blowing and filling process of the mold bag 9, manual cooperation is also required to integrate sand excavation, sand conveying and sand unloading, thereby improving production efficiency. The length of each section of the mold bag 9 is 50 meters, and each section of the mold bag 9 is blown and filled to a height of 1 meter. The overlap of the mold bag 9 is 1.5 meters to ensure that each section of the mold bag 9 is connected as a whole. At the same time, the characteristic of the reef sand being dense when in contact with water is utilized to make the revetment of the mold bag 9 hard and resistant to scouring.

[0031] The construction process is as follows:

[0032] 1. Construction preparation

[0033] (1) Prepare a plan, discuss and finalize it, and provide safety and technical briefings to construction site personnel.

[0034] (2) Prepare on-site personnel, machinery and materials to ensure that construction personnel, machinery and materials arrive on-site in a timely manner.

[0035] 2. The coastline is flat

[0036] (1) Before laying the mold bag 9, an excavator is used to level and clean the uneven position of the coastline 5, especially to clean up sharp objects and debris (large pieces of coral, shells) that are easy to scratch the mold bag 9.

[0037] (2) After the coastline 5 is cleaned, a layer of fine sea sand is laid under the blow-fill mold bag 9 using an excavator. Shells, corals, etc. are cleaned up in time during the process to extend the service life of the mold bag 9.

[0038] 3. Measurement and positioning

[0039] (1) Locate according to the design drawing and coordinate points of the mold bag 9 revetment, setting one point every 20 meters and one point every 5 meters at the bend.

[0040] (2) Before the suction construction, the inner boundary of the top of the mold bag 9 and the bottom edge line of the mold bag 9 are positioned, and 2-meter wooden piles are used as the positioning basis. At the same time, the number of blowing and filling layers of the mold bag 9 is controlled according to the bottom elevation of the coast.

[0041] (3) Since the number of layers of mold bags 9 stacked at different water depths is different, the height of the mold bags 9 during the blowing and filling process must be adjusted accordingly in a timely manner.

[0042] 4. Positioning of cutter suction vessel

[0043] (1) Before positioning the dredging vessel, a small boat is first used to survey the seabed topography, determine the scope of the dredging construction, understand the distribution, thickness and physical properties of the reef sand, and set the coordinates.

[0044] (2) Use a tugboat to move the dredging vessel to the designated construction location and check the preparatory work and various mechanical properties before the dredging vessel.

[0045] (3) Determine the order of anchoring and the location of the anchor piles according to the wind direction and water current conditions to stabilize the ship.

[0046] 5. Install the sand conveying pipe (the sand conveying pipe is a 377mm diameter PVC wear-resistant pipe 4 and a 150mm diameter rubber pipe 7)

[0047] (1) When installing the sand transport pipeline, avoid right-angle bends, minimize the resistance head loss along the pipeline and the local resistance head loss, and reduce the dynamic load.

[0048] (2) The connection interface between the sand delivery pipe and the mold bag 9 should be firm to prevent the sand from being lost during the filling process due to the slipping of the pipe.

[0049] 6. Laying of mold bag 9

[0050] (1) Lay mold bags 9 in the construction area to ensure that the mold bags 9 are closely connected without gaps.

[0051] (2) Use sandbags, anchors or other fixing devices to secure the mold bag 9 to the revetment to prevent it from shifting under the impact of water flow.

[0052] (3) The mold bags 9 are laid one by one in a blowing and filling manner to prevent the mold bags 9 from being scratched during the blowing and filling process or when the pipeline is shifted.

[0053] (4) When blowing and filling the bottom mold bag 9, the height of the tide should be considered, and low tide construction should be arranged as much as possible to improve the filling quality and appearance quality.

[0054] (5) After the mold bag 9 is laid, the positioning is re-measured in time.

[0055] 7. Reef sand filling

[0056] (1) Install a conversion head 6 at the position of the sand blowing pipe of the suction dredger, install a rubber hose at the position of the conversion head 6, start the reamer device, and mix the reef sand on the seabed with water.

[0057] (2) The mixture is pressurized by the centrifugal pump system of the cutter suction vessel and then transported to the mold bag 9 area through the sand transport pipe.

[0058] (3) When the reef sand filling starts, the filling speed should not be too fast to prevent the mold bag 9 from shifting due to excessive filling.

[0059] (4) During the blowing and filling process, 3-5 workers are arranged to step on the mold bag 9 to make it tighter and denser.

[0060] (5) The bag filling degree can be controlled at 80% to prevent the bag from bursting due to overfilling.

[0061] 8. Post-maintenance

[0062] (1) Test and inspect the newly constructed bank protection structure to ensure its stability and safety.

[0063] (2) Carry out necessary reinforcement and repair work as required.

[0064] (3) Damaged areas of the revetment should be restored to their original state in a timely manner to ensure that the impact of construction activities on the surrounding environment is minimized.

[0065] The practical significance of this construction method for construction is as follows:

[0066] 1. Improve the stability of the bank protection: By blowing and filling reef sand with a suction dredger, a solid protective layer can be quickly formed on the shore section that needs protection. The filling of reef sand enhances the anti-scouring ability of the coastline 5, effectively preventing the erosion of the bank by water flow, wind and waves and sea tides, thereby improving the overall stability of the bank protection.

[0067] 2. Enhanced protection effect: The mold bag 9 bank protection material uses a degradable synthetic fiber mold bag 9. This structure not only has good water permeability and integrity, but also can effectively disperse the impact of water flow and reduce direct scouring of the bank. The combination of reef sand and mold bag 9 further enhances the protection effect and extends the service life of the bank protection.

[0068] 3. High construction efficiency: The construction process of the dredger suction boat blowing and filling the reef sand mold bag 9 revetment is relatively simple and can quickly respond to engineering needs. The dredger suction boat can directly suck up the reef sand on the seabed and transport it to the designated location, and then form a protective layer through the mold bag 9 injection technology, which greatly improves the construction efficiency.

[0069] 4. Cost saving: Using local reef sand as filling material reduces the cost of transporting materials. At the same time, compared with traditional hard revetment structures (such as concrete walls), the mold bag 9 revetment technology has lower construction costs and shorter construction periods, thus achieving cost savings.

[0070] 5. Environmental protection and sustainability: The construction process of the reef sand bag 9 revetment by suction dredger has little impact on the environment. As a natural material, reef sand produces less waste during its mining and use. In addition, the bag 9 revetment structure has good water permeability and ecological compatibility, which is conducive to the growth and reproduction of aquatic organisms, promotes the sustainable development of the ecological environment, and conforms to the contemporary concept of "energy saving, consumption reduction, low carbon and environmental protection".

[0071] The key technical points of this construction method are as follows:

[0072] (1) The sand conveying pipe needs to ensure continuity and stability during the sand conveying process to avoid problems such as mud blockage and leakage. The selection, layout and maintenance of the sand conveying pipe are also key, and it needs to have sufficient bearing pressure and wear resistance.

[0073] (2) The mold bag 9 needs to be laid flat to ensure that the mixture of reef sand and water can be evenly injected and consolidated. At the same time, the mold bag 9 must be firmly fixed to prevent displacement or damage under the impact of water flow.

[0074] (3) The speed must be evenly controlled during the reef sand suction process to avoid excessive speed causing the mold bag 9 to collapse or uneven consolidation.

[0075] (4) The formulation and implementation of the construction of biodegradable synthetic fiber reef sand mold bag 9 needs to comprehensively consider factors such as geological landforms, hydrology and water quality, climatic conditions, vegetation ecology, etc., and combine technology and management experience to ensure safety, quality, and environmental protection during the construction process. In the actual construction process, the construction plan should be appropriately adjusted and improved according to the specific situation to ensure the smooth progress of the project and achieve the expected results.

[0076] (5) After the construction is completed, the hydrology, water quality and geology around the revetment will be monitored, and the horizontal displacement and settlement of the revetment will be monitored. If any problems are found, they will be repaired and reinforced in a timely manner to ensure the stability and safety of the revetment.

Claims

1. A reef sand bag wave-breaking wall revetment cutter suction filling integrated construction method, comprising a cutter suction filling vessel hull (1), characterized in that: A dredging vessel bow (2) is arranged at the right end of the dredging vessel hull (1), a dredging vessel cutter (3) is installed at the lower end of the dredging vessel bow (2), and the right end of the dredging vessel cutter (3) is tilted downward by about 30-60 degrees; a 377 mm diameter PVC wear-resistant pipe (4) is connected to the left end of the dredging vessel hull (1) via a flange, a conversion head (6) is installed at the left end of the 377 mm diameter PVC wear-resistant pipe (4), and a plurality of arc-shaped scattered rubber pipes (7) are connected to the upper side of the left end of the conversion head (6) via a flange; A reef sand mold bag wave-blocking wall revetment integrated construction method comprises the following steps: a dredging suction boat (1) is driven to the surface of the sea area close to a coastline (5), the dredging suction boat and the coastline (5) are kept at a distance equal to the length of a 377 mm diameter PVC wear-resistant pipe (4), the left end of the 377 mm diameter PVC wear-resistant pipe (4) is close to the edge of the coastline (5), an adapter is placed on the coastline (5), and the adapter connects a 150 mm diameter rubber pipe (7) and a 377 mm diameter rubber pipe (7) to the coastline (5). The PVC wear-resistant pipes (4) are assembled into one body to form a passage. A mold bag (9) is placed on the coastline (5). The mold bag (9) is close to the left side of the adapter and is placed below a plurality of 150 mm diameter rubber pipes (7). The bow (2) of the dredging vessel is horizontally supported by the hull (1) of the dredging vessel and tilted downward at an angle of about 30-60 degrees toward the sea and extends into the dredging vessel cutter (3). The dredging vessel cutter (3) crushes and sucks the reef sand in the sea. The hull (1) of the dredging vessel has a built-in centrifugal pump to transfer the reef sand crushed by the dredging vessel cutter (3) to the inside of the 377 mm diameter PVC wear-resistant pipe (4). The 377 mm diameter PVC wear-resistant pipe (4) is used to carry out the dredging of the dredging vessel. The PVC wear-resistant pipe (4) transports the reef sand to the adapter. The reef sand is transported to different positions on the surface of the mold bag (9) through a plurality of rubber tubes (7) with a diameter of 150 mm inside the adapter. The mold bag (9) shapes the reef sand. The reef sand is concentrated and piled on the mold bag (9) to form a wave-blocking wall for protecting the coastline (5). After every other layer of the mold bag (9) is fully laid on the coastline (5), the number of reef sand piled increases as the number of reef sand piled increases. Each additional layer of reef sand gradually shrinks the circumference of each additional layer of the mold bag (9). The cross-section of the reef sand and the mold bag (9) presents a trapezoidal-shaped revetment retaining wall on the coastline (5).

2. The integrated construction method of reef sand bag wave-breaking wall and bank protection by suction and filling as claimed in claim 1, characterized in that: A mold bag (9) installed at the left end of the conversion head (6) is arranged below the 150 mm diameter rubber tube (7), and a coastline (5) is arranged at the lower side of the left end of the conversion head (6). The mold bag (9) is placed on the coastline (5), and the coastline (5) provides a horizontal placement plane for the mold bag (9).

3. The integrated construction method of reef sand bag wave-breaking wall and bank protection by suction and filling as claimed in claim 2, characterized in that: The upper end of the mold bag (9) is provided with a plurality of sand inlets (8), the plurality of sand inlets (8) are respectively connected to the interior of the adjacent 150 mm diameter rubber tubes (7), the lower ends of the plurality of 150 mm diameter rubber tubes (7) are directly connected to the corresponding plurality of sand inlets (8), the reef sand is uniformly injected into the mold bag (9) along the plurality of 150 mm diameter rubber tubes (7) through the corresponding sand inlets (8), the reef sand fills the mold bag (9), the 150 mm diameter rubber tubes (7) are withdrawn from the sand inlets (8), the sand inlets (8) are closed, the mold bag (9) provides a molding template for the reef sand, and the shape of the reef sand after molding is consistent with the shape of the mold bag (9).

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