86results about "Land reclamation" patented technology

A leaching and desalinating system for sandy soil in estuarine land reclaimed by sand blowing before planting greenery is provided. The leaching and desalinating system comprises a water pump and pipe assembly, a freshwater storage tank and a main diverting and draining channel. The water pump and pipe assembly lifts freshwater from a river to the freshwater storage tank through a water delivery pipe, multiple infiltration parts in which greenery is planted are provided on the waterside slope, the infiltration parts are connected to each other via multiple drainage infiltration channels. The present disclosure can quickly desalinate the sandy soil in land reclaimed by sand blowing at a low cost, improve the physicochemical properties of the soil, and provide a basic guarantee for the subsequent greenery planting on the sandy soil in land reclaimed by sand blowing.

The invention discloses a drag suction dredger rainbow blowing adjustable nozzle assembly and a bow spraying device and method, and belongs to the technical field of bow spraying. A rainbow blowing adjustable nozzle assembly of a trailing suction dredger comprises a nozzle part and a ball joint part used for connecting the nozzle part and a bow spraying pipeline on the dredger, and the ball joint part comprises a lower supporting frame, a lower supporting frame, a lower supporting frame, an upper supporting frame and a lower supporting frame, and one end of the lower supporting frame is connected with the bow spraying pipeline through a first flange; the upper supporting frame is fixedly connected to one side of the lower supporting frame, and a spherical groove is defined by the upper supporting frame and the lower supporting frame; the movable ball pipe comprises a reducer pipe and a ball body which are fixedly connected, the ball body is movably connected into the spherical groove, and the end, away from the ball body, of the reducer pipe is connected with the nozzle part through a second flange; by dynamically adjusting the spraying range of the nozzles, the slurry drop point can be flexibly changed, the effective operation range is remarkably expanded, drop point distribution is accurately controlled, the unevenness of the surface of a hydraulic reclamation area is effectively avoided, the flatness quality requirement is met, frequent ship displacement needed by drop point adjustment is reduced, and the construction efficiency is greatly improved.

The invention relates to an automatic dredging control method based on target parameters of a trailing suction dredger, which comprises the following steps of: setting target parameters of dredging and loading operation to be controlled under a dredging and loading working condition, and constructing a dredger according to a construction path planned by a system; the system jointly controls dredging operation equipment such as a steering engine, a propeller, a rake arm winch, an active rake head, a wave compensator, a high-pressure flushing pump and an underwater / cabin mud pump to achieve dredging and driving integrated dredging and cabin loading operation, and in the dredging and cabin loading process, the controlled equipment is always kept to stably operate at a set target parameter value. Therefore, efficient automatic dredging operation of the trailing suction hopper dredger is achieved. According to the method, the target parameters of the dredging and loading operation are set, the controlled equipment is always kept to stably operate at the set target parameter values in the dredging and loading process, and efficient automatic dredging operation of the trailing suction hopper dredger is achieved.

The invention relates to an automatic dredging control method for economic yield of a trailing suction dredger, which comprises the following steps of: under a dredging loading working condition, acquiring the ratio of concentration and flow velocity to oil consumption of a loading pipeline according to historical data of concentration and flow velocity and oil consumption of the loading pipeline in construction; the concentration and flow rate target values of the loading pipeline with the most economic benefits under the working condition are determined in a mode of taking the maximum ratio, and the ship navigational speed, the rake head angle, the rake head cutting depth, the wave compensator pressure, the high-pressure flushing pressure and the dredge pump rotating speed are automatically controlled according to the target values; and meanwhile, the steering engine and the propeller are jointly controlled to realize automatic dredging and loading operation of the dredger according to a planned path, so that the dredging yield is stabilized near the economic yield, and the efficient automatic dredging and loading operation of the trailing suction dredger with the best economic benefit is realized. According to the method, it can be guaranteed that the optimal ratio of economic output to cost input can be obtained in automatic dredging and loading operation conducted under the economic output, and therefore economic benefits are greatly improved.

The invention discloses a construction method for curing sludge while blowing sludge, which comprises the following steps of: filling sludge with two layers of film bags to form a fence for blocking sludge on the outer surface layer, and pumping floating water on the upper layer by using a sludge pump; sludge solidification is directly carried out on the reinforced area in an in-situ solidification mode, the hydraulic reclamation area is propelled from one side of the levee, and the next construction working face is fished out; curing in the cured area for 7 days, and moving the sludge curing equipment to the cured area after the strength is reached; a film bag is arranged at the solidification boundary to flush and fill the flow-state solidified soil, and sludge solidification equipment is adopted for assisting sinking to the bottom elevation + 0.22 m; carrying out in-situ solidification on the dredger-filled sludge soil in the rest area; after the in-situ curing area reaches the strength, sludge ex-situ curing construction is conducted in a layered mode, and the curing thickness of each layer is 0.8 m; and the flow-state solidified soil is constructed layer by layer in sequence to + 6.20 m. The construction process of in-situ curing and heterotopic curing is adopted, an effective construction channel and an effective construction platform are formed, and a guarantee is provided for the on-site production progress.

The invention discloses a hydraulic reclamation rapid land formation construction method, and belongs to the technical field of hydraulic reclamation. A hydraulic reclamation rapid land formation construction method comprises the following steps that S1, the pipeline connecting frequency is reduced, and pipeline connection is optimized; s2, upheaval pipe heads control the hydraulic reclamation elevation; s3, a proper sandy soil material is selected to dynamically blow-fill the blow-filling pug so as to accelerate consolidation; s4, a smooth drainage channel is constructed, and mud-water separation is accelerated; s5, the top of the hydraulic reclamation pug is dynamically leveled; under the condition that the elevation of the cofferdam is insufficient, the land which is nearly one meter higher than the elevation of the cofferdam can be dredger-filled, the dredger-filling construction progress can be improved conveniently, and the dredger-filling construction efficiency is guaranteed.

The application discloses a kind of mobile underwater layered hydraulic fill construction indoor simulation test method, comprising: step (1) by input module design key test parameters;Step (2) by input module setting water depth, speed and wave conditions;Step (3) by management module mixes uniform mud;Step (4) by management module starts first layer mobile hydraulic fill;Step (5) by management module completes first layer mobile hydraulic fill;Step (6) by management module repeats step (4)-(5);Step (7) by measuring system measures hydraulic fill test characteristic parameter;Step (8) clears up water tank test area silt. Various key construction parameters are adjusted, and multi-layer repeated mobile construction simulation technology is realized, which provides an effective means for in-depth study of high-precision layered hydraulic fill technology, improvement of construction efficiency and management quality.

The invention discloses a water pumping and sand discharging pipeline system for a sand hopper and a construction technology of the water pumping and sand discharging pipeline system and belongs to the technical field of pipeline systems. A water pumping and sand discharging pipeline system for a sand hopper comprises a sand hopper body fixedly arranged on a ship deck through a fixing rod, and further comprises a pumping and sand discharging part, the pumping and sand discharging part comprises a first deck pump and a second deck pump which are arranged on the ship deck, the first deck pump is connected with a first discharging pipe, and the second deck pump is connected with a second discharging pipe; the pumping water pumping part comprises an underwater pump and a submersible pump which are arranged in the ship bridge frame; and a pumping and draining pipeline assembly. By refitting an existing cutter suction dredger and integrating the pumping and draining pipeline assembly and the cross-shaped connecting pipeline, flexible switching of the first deck pump, the second deck pump and the underwater pump among three modes of double-pump parallel connection, double-pump series connection and three-pump series connection is achieved, the operation production efficiency is improved, the production cost is reduced, and the service life of the cutter suction dredger is prolonged. And the device is suitable for an environment-friendly construction scene of short-row-pitch large-yield or long-row-pitch accurate conveying.

We propose a ground material using crushed clay tiles that can reduce turbidity when used underwater, and a method for reclamating seabeds using this ground material. [Solution] This is a ground material made by mixing crushed clay tiles and sand. The fine-grained content of the crushed clay tiles, including silt and clay, is 20% or less, the maximum particle size is 30 mm or less, and the 50% particle size is 10 mm or less. The maximum particle size of the sand is 2.0 mm, and the mixing ratio of sand to dry weight is in the range of 20% to 60%. When filling the bottom of a body of water with this ground material, it is moistened by soaking it in water before being placed in the water.

The present application relates to a kind of ecological island building fill unit, fill unit middle is provided with through hole, fill unit includes shell surface layer, middle structural layer and internal filling layer;Shell surface layer is made of neutral material, to ensure that the sea bottom water quality and related environmental indicators where fill unit is after sinking to bottom are not affected;Structural layer uses high-performance corrosion-resistant material, for bearing the water head pressure after fill unit sinking to bottom, unit stacking transmission pressure and mutual collision force, the whole outside of structural layer is covered by shell surface layer, and internal full-closed cavity is formed;Filling layer uses the full-closed cavity surrounded by structural layer, and fills crushed construction waste.The present application has the advantages of simple structure, large specific weight, easy production and transportation, etc.

This invention relates to the field of engineering foundation construction, specifically disclosing a method for removing fine particles from dredged sandy soil foundations. The method includes a pipeline, an upper rod, a suction pipe, and a cone. The upper rod contains a high-pressure water pipe, a high-pressure air pipe, and a suction pipe, all connected to the pipeline. The suction pipe, from the outside in, consists of an outer shell, a filter screen, and a suction chamber. The outer shell has several suction holes and several high-pressure air jet holes, connected to the high-pressure air pipe, and the suction chamber is connected to the suction pipe. The cone's tip has a high-pressure water jet hole connected to the high-pressure water pipe. Several vibrating rods are fixedly installed within the upper rod and suction pipe. This invention's fine particle removal equipment penetrates deep into the soil layer and removes fine particles through suction and filtration. It has a simple structure, is easy to implement, has low construction costs, and is convenient to operate. It can effectively remove fine particles from dredged sandy soil foundations, greatly reducing the difficulty of dredged sandy soil foundation treatment construction.

The present invention relates to a construction method for a multi-stage prefabricated ecological drainage system in a reclamation area, comprising the following steps: fabricating a base and annular precast blocks, and installing pre-embedded threaded sleeves and lifting rings within the base and annular precast blocks; installing the base and drainage pipes at a lower elevation in the reclamation area, and backfilling and compacting the soil; stacking the annular precast blocks layer by layer on the base and fixing them with connecting bolts, and wrapping the annular precast blocks with geotextile; selecting appropriate-sized primary, secondary, and tertiary filter baskets to assemble a multi-stage filter basket filtration system, and suspending the multi-stage filter baskets on the top annular precast block, and fitting vertical filter cylinders around the annular precast blocks; conveying slurry to the reclamation area to begin reclamation operations; promptly cleaning the silt and sand within the multi-stage filter baskets and adding annular precast blocks during reclamation; after reclamation is completed, lifting the annular precast blocks and base layer by layer from the sedimentary soil layer; and backfilling the pits left by the base and annular precast blocks in the sedimentary soil layer by layer with backfill soil.

Dewatering systems and methods for use in response to emergencies and disasters. The system includes an autonomous vehicle including or transporting a dewatering device. In response to information about a water-related disaster at a specific location, the system will instruct the vehicle to travel to the location, enter a building, and initiate a series of dewatering cycles in the interior space of the building. The vehicle can navigate from room to room and determine whether fluid content levels exceed a specified threshold. In response, the vehicle can direct its dewatering operation to these specific zones.

The invention belongs to the technical field of water conservancy construction equipment, and particularly discloses a green and environment-friendly hydraulic reclamation intelligent construction relay pump station and a device thereof, the intelligent construction relay pump station comprises a pump body used for conveying slurry, and the pump body is connected with a feeding pipe and a discharging pipe. Rock blocks in slurry are intercepted through the multiple stages of baffle plates, the situation that a pump body pipeline is blocked by the rock blocks and components such as a pump body impeller and a pump shell are abraded is avoided, equipment faults and maintenance cost are reduced, and the continuity of hydraulic reclamation operation is guaranteed; by combining the design of an anti-leakage pipeline, slurry recovery and the like, zero-pollution transfer of the slurry, carbon reduction, efficiency improvement and strict control of secondary pollution are realized; meanwhile, block stone interception and passing modes are adjusted in a self-adaptive mode according to the slurry flow speed, the slurry conveying efficiency is guaranteed while the block stone collecting efficiency is improved, a remote control system is additionally arranged, the system is matched with channel dredging, sea reclamation, lake and reservoir desilting and other scenes, the slurry conveying distance is prolonged, and the dual requirements of environmental protection and intelligent construction are met.

The present invention provides an anti-seepage cofferdam and a construction method thereof, comprising high-pressure rotary jet grouting pile foundations located on the waterfront and waterfront sides and a steel pipe pile foundation located in between; a crushed stone cushion layer and a core stone are sequentially arranged above the high-pressure rotary jet grouting pile foundations; natural soil is provided between the steel pipe piles of the steel pipe pile foundations; a crushed stone cushion layer and backfilled medium-coarse sand are sequentially arranged above the natural soil; two stone cushion layers and a mortar block stone face protection are sequentially arranged above the core stone on the waterfront side, and a bottom protection block stone is also arranged at the front end of the waterfront side; two stone cushion layers, a mixed filter layer, a geotextile filter layer, and bagged sand are sequentially arranged above the core stone on the waterfront side; and a concrete wave retaining wall is further arranged above the two stone cushion layers above the core stone on the waterfront side and near the steel pipe pile foundation. The present invention can enhance the stability of the offshore anti-seepage cofferdam, prevent seawater backflow and infiltration, and facilitate construction.

The invention discloses a dam hydraulic reclamation construction method. The method comprises the steps that a plurality of monitoring points are arranged in a hydraulic reclamation area; performing hydraulic reclamation construction on the hydraulic reclamation area according to the set hydraulic reclamation speed in the previous monitoring period; elevation values are detected at the starting moment and the ending moment of the previous monitoring period at each monitoring point; calculating the settlement amount of each monitoring point in the previous monitoring period; calculating the settling volume of the hydraulic reclamation area in the previous monitoring period; when the settling volume of the hydraulic reclamation area in the previous monitoring period is larger than or equal to a first settling volume threshold value, the next hydraulic reclamation speed is reduced to 70-80% of the previous hydraulic reclamation speed; when the settling volume of the hydraulic reclamation area in the previous monitoring period is smaller than or equal to a second settling volume threshold value, the next hydraulic reclamation speed is increased by 1.1-1.3 times of the previous hydraulic reclamation speed; and repeating the execution. The hydraulic reclamation speed can be adjusted according to the sedimentation condition of the dam hydraulic reclamation area, the hydraulic reclamation effect is improved, and the dam construction quality is improved.

The invention discloses a bow blowing device and a production process thereof, and relates to the technical field of ship bow blowing devices. According to the bow blowing device and the production process thereof, the bow blowing device comprises a seat frame, the bottom of the seat frame is fixedly connected with an outfitting platform, one side of the seat frame is provided with a ventilation device, the bottom of the seat frame is provided with a spherical joint, the interior of the seat frame is fixedly connected with a bow spraying straight pipe, the interior of the seat frame is fixedly connected with a bow spraying bent pipe, and the surface of the bow spraying bent pipe is fixedly connected with a bow spraying nozzle. A bow blowing straight pipe is fixedly connected into the seat frame, one end of the bow blowing straight pipe is fixedly connected with a bow blowing bent pipe, a connector lifting chain is arranged on the seat frame, idler wheels are arranged on the top of the seat frame, a grease pipeline is arranged in the seat frame, and a hydraulic pipeline is arranged in the seat frame. The key components such as the seat, the fitting-out platform and the spherical joint are all connected through high-strength welding and flanges, the maintenance convenience is optimized through the integrated design of the ventilation device, the grease pipeline and the hydraulic pipeline, and the downtime is shortened.

This invention discloses a double bow spraying device for a trailing suction hopper dredger, belonging to the field of dredging technology. The double bow spraying device for a trailing suction hopper dredger includes a bow, on which an mounting plate is fixedly installed. The mounting plate is equipped with two sets of angle adjustment mechanisms, each connected to a spraying mechanism. Each angle adjustment mechanism includes a horizontal adjustment component for driving the spraying mechanism to rotate horizontally and a vertical adjustment component for driving the spraying mechanism to rotate vertically. The horizontal and vertical adjustment components are connected. An automatic pressurization component is provided on the spraying mechanism. This invention can automatically adjust the bow spraying range of the dredger, increasing the operational spraying range, reducing the workload of the crew, and greatly improving the quality and efficiency of bow spraying and dumping of dredged material by the trailing suction hopper dredger.

The utility model relates to the technical field of water conservancy projects, and discloses a transportation vehicle-trapping-prevention device in the water conservancy project sea filling and road paving process, which comprises a supporting plate, and is paved on two sides of a muddy road section through the supporting plate, and ground gripping teeth on the outer wall of the supporting plate can be used for improving the ground gripping property of a road surface and tires of a transportation vehicle, so that an anti-skid effect is achieved; inserting rods are fixed in inserting holes in the upper portions of the bearing plates through connecting and fixing plates, so that the two bearing plates are fixed, stability after installation is improved, and tires are prevented from slipping and being trapped when a vehicle passes by, first connecting blocks and second connecting blocks are fixedly installed on the outer walls of the bearing plates, the second folding rods are extended through first folding rods and middle shafts, and therefore the stability of the vehicle is improved. When the supporting device is installed on the ground, the supporting performance and stability of the supporting device and the road surface are improved, the contact area of the supporting device and the road surface is increased, the stress area is increased, sinking is avoided, and therefore the two sets of supporting plates can be stored conveniently.

A mobile underwater layered filling construction indoor simulation intelligent test system includes a control system and a measurement system. By integrating multiple specialized subsystems, it can fully simulate underwater mobile filling construction methods in open waters. This mobile underwater layered filling construction indoor simulation intelligent test system can adjust the construction environment's impacts, such as wind, waves, currents, and water depth, as well as key construction parameters such as the filling device's movement speed, distance from the bottom, slurry flow rate, slurry concentration, and sediment type. This system implements multi-layer, repetitive mobile construction simulation technology, providing an effective means for in-depth research on high-precision layered filling technology and improving construction efficiency and management quality.

The present invention discloses a self-repairing high-strength and high-durability geotextile filling bag and a preparation method thereof, comprising a filling bag body, a sewing line and a filling cuff; the filling bag body is made of a self-repairing high-strength and high-durability geotextile sewn by sewing line; the self-repairing high-strength and high-durability geotextile comprises a first geotextile or a second geotextile, the first geotextile is used for filling when the soil body is fine-grained soil and needs to be blown on site, and the second geotextile is used for filling when the soil body is coarse sand and needs to be blown on site or filled with dry sand in the factory; the fine Granular soil refers to soil with a particle size of ≤0.075mm, and coarse sand refers to soil with a particle size of 0.075-2mm. The first geotextile consists of a filtration functional layer and a high-strength wear-resistant layer arranged from bottom to top. After sewing them into a filling bag, the filtration functional layer is located on the inner side of the filling bag. The second geotextile consists of a warp-knitted high-strength geotextile, a spacer yarn layer and a warp-knitted high-strength geotextile arranged from bottom to top. After sewing them into a filling bag, the warp-knitted high-strength geotextile is located on the inner side of the filling bag.

This invention provides a landfill material that can be used even when there is a time lag between mixing and dispensing it into water. [Solution] The method for manufacturing landfill material involves mixing soil, a stabilizer, and a setting retarder to produce landfill material in a non-slurry state. The method includes the step of adding a separation inhibitor to the mixed material obtained by the step of mixing soil, a stabilizer, and a setting retarder, in order to prevent the separation of the stabilizer and the soil, and the amount of setting retarder mixed is controlled based on the water content of the soil.

This invention belongs to the field of land reclamation technology, specifically relating to a land reclamation system and method based on a high-water-content material-slurry composite. The system includes an integrated movable platform, a sand extraction system, a water supply system, a slurry preparation system, a slurry mixing system, a slurry delivery pipeline system, and a dredging operation system. The integrated movable platform has a sand extraction system and a water supply system at one end, a slurry mixing system at the other end, and a slurry preparation system in the middle. The water supply system is connected to the input end of the slurry preparation system, and the output end of the slurry mixing system is connected to the dredging operation system. All dredging operations are conducted via pipelines, resulting in a simple and convenient construction process. In this invention, the hardened high-water-content material only requires a few days of curing to achieve a strength far exceeding that of ordinary soft soil. Therefore, the land reclamation operation cycle is significantly reduced, solving the problems of low efficiency and high construction costs associated with existing dredging and reclamation foundation treatment technologies.

The present application provides a water displacement storage yard construction method, comprising: construction of a water-stop enclosure; enclosure and drainage construction: after the water-stop enclosure is closed, water within its enclosure is drained to expose the pit body, thereby forming dry construction conditions; yard construction: under dry construction conditions, yard construction is carried out on the pit body, comprising construction of a lower low-level floor and a higher high-level floor; wherein the low-level floor is lower than the average water level outside the water-stop enclosure; the high-level floor can be used for the movement of stacking and reclaiming equipment, and the stacking and reclaiming equipment can transport materials to or from the silo body; and silo body construction: the silo body is constructed on the low-level floor.

To provide an artificial shallow area more suitable for the growth of seagrass and / or seaweed. [Solution] An artificial shallow area according to one aspect of the present invention is an artificial shallow area located underwater, comprising a first submerged breakwater having at least a surface of stone arranged on it, and a substantially horizontal first construction surface connected to the first submerged breakwater, wherein the surface layer of the first construction surface consists of one or more base materials selected from the group consisting of solidified soil, sand, gravel, and stone.

The invention provides a dredger fill foundation reinforcement effect evaluation method and system based on monitoring data inversion, and relates to the technical field of dredger fill foundations, and the method comprises the steps: carrying out the multi-level monitoring deployment of a dredger fill foundation construction area according to a dredger fill foundation reinforcement scheme; according to the dredger fill foundation monitoring grid, construction synchronous monitoring of the dredger fill foundation construction area is executed, and multi-degree-of-freedom foundation performance parameter inversion is carried out; performing multi-index reinforcement effect evaluation on the foundation performance parameter inversion layer according to the reinforcement effect evaluation event set; performing abnormal causal tracing on the reinforcement effect evaluation characteristic layer according to reinforcement operation monitoring data; and a dredger fill foundation reinforcement scheme is fed back and adjusted according to the reinforcement effect evaluation graph model. According to the method and the device, the problem of monitoring disjunction in dredger fill foundation reinforcement effect evaluation in the prior art can be solved, data-driven real-time inversion and multi-dimensional comprehensive evaluation are realized, and the technical effect of establishing a comprehensive evaluation system is achieved.

The dredged soil landfill drainage device of the present application is provided with a foundation pad (30) on the inner side of the dam ground; one or more fixed water collecting wells (40) are established on the foundation pad and collect the external water flow into the interior; water level corresponding drainage materials (50) are arranged around the water collecting well, the bottom of which is fixed on the foundation pad, and the water level corresponding drainage materials have flexibility, including drainage materials (51) leading to the foundation pad, multiple levels of the drainage materials arranged at a certain height from each other, and buoys (52-1, 52-2, 52-3) floating on the water to establish the drainage materials.

The utility model provides a gate box buried pipe type drainage port system which comprises a plurality of gate box buried pipe type drainage structures connected in sequence, each gate box buried pipe type drainage structure comprises a lower box body and an upper box body, the upper end of each lower box body is open, the end face of each lower box body is concavely provided with an annular sliding groove, the upper end and the lower end of each upper box body are open, and the lower end of each upper box body is inserted into the corresponding sliding groove in a sliding mode. The upper box body can move up and down relative to the lower box body, so that the overall height of the upper box body and the lower box body can be adjusted, the gate box can better adapt to different cofferdam water levels, better adaptability is achieved, and the problems that in the prior art, a gate box is fixed in height, and the cofferdam water level adaptability is poor are solved.

The present application provides a water body replacement storage yard, including a water-stop dike and a storage yard; wherein, the storage yard is constructed in the internal space enclosed by the water-stop dike, and is located on a pit formed after the water inside the water-stop dike is drained; the storage yard includes a lower low-level floor and a higher high-level floor; wherein, the low-level floor is lower than the average water level outside the water-stop dike, and a warehouse is constructed on it; the high-level floor can be used for the movement of stacking and reclaiming equipment.

The invention relates to the technical field of port navigation channel engineering, in particular to a dredging hydraulic reclamation construction device for port navigation channel engineering, which comprises a transfer platform, the transfer platform is formed by assembling four movable support plates and a connecting plate, the outer side walls of the movable support plates are fixedly connected with the connecting plate, and the side walls of the connecting plate are fixedly connected with buffer strips; connecting plates are fixed to the inner side wall of the transfer platform through bolts, mounting grooves are formed in the side walls of the connecting plates, cover plates are fixedly connected to the inner walls of the mounting grooves, transfer material collecting barrels are arranged between the adjacent movable supporting plates, the transfer material collecting barrels are fixedly connected with the inner side walls of the cover plates, and the adjacent ends of the four connecting plates are fixedly connected with center connecting columns. Compared with the prior art, silt which cannot be conveyed by a dredger can be collected in a centralized mode, the device can move flexibly, labor division is clear, and when the output amount of a plurality of excavation points is not large, the silt is stored in a centralized mode to be conveyed by a connection ship in a unified mode, so that efficiency is improved.