Suspension funnel-shaped sea sand trapping cage net and coastal erosion protection system

Abstract

The present invention discloses a floating funnel-shaped sea sand trapping cage net and a coastal erosion prevention system. The coastal erosion prevention system includes a giant kelp planting area, a floating funnel-shaped sea sand trapping cage net, a brush column, a hanging plate type one-way sand barrier, and an n-shaped floating storage sand barrier arranged in sequence from the ocean direction towards the land direction. The giant kelp planting area, the floating funnel-shaped sea sand trapping cage net, the brush column, the hanging plate type one-way sand barrier, and the n-shaped floating storage sand barrier are respectively parallel to the coastline and arranged in multiple rows. The coastal erosion prevention system provided by the present invention includes five measures with respective functions, and the distribution areas range from the nearshore seabed to the land beach, and they complement each other. It can make the onshore supply of water and sand and wind-blown sand deposits greater than the offshore loss, promote the siltation of the seabed and the beach, continuously increase the elevation of the seabed surface and the beach, weaken the wave energy, and effectively inhibit the occurrence of coastal erosion.

Description

Technical Field

[0001] The present invention belongs to the technical field of coastal erosion control, and particularly relates to a suspended funnel-shaped sea sand trapping cage net and a coastal erosion protection system. Background Art

[0002] Among marine disasters, coastal erosion with a global trend has generally attracted people's attention. Coastal erosion refers to the destructive process in which the coast retreats due to less sand supply along the coast than sand loss under the action of marine dynamics. This causes environmental hazards such as beach erosion, reduction of island and land areas, flooding of coastal lowlands, seawater intrusion, and destruction of nearshore buildings and facilities. Therefore, it is very necessary to develop methods to promote siltation of sandy coasts and islands and prevent coastal erosion.

[0003] In order to mitigate the harm caused by coastal erosion, the current method is to change the migration pattern of nearshore sediment through engineering measures in local coastal sections to make the sediment accumulate. The main protection projects are as follows:

[0004] First, sea dikes. Sea dikes are traditional coastal protection methods for humans. They are built in higher areas of the beach and are buildings used to demarcate the coastal land area and the sea area, and generally run parallel to the coastline. Although it has played a great role in fixing the coast and preventing tides and waves. But it generally cannot be used for beach protection, and it is not suitable as a long-term wave protection method, unless it is used as an auxiliary or emergency measure under other engineering measures. Therefore, this engineering structure is generally only applicable to coasts with small waves or silting coasts to prevent abnormal sea subsidence.

[0005] Second, groins and groin fields. Groins and groin fields are coastal buildings almost perpendicular to the coastline. Their function is to intercept the sediment transported from the upstream of the coast and form a wide beach to protect the coast. Groins have a relatively mature application in muddy coasts and can be used in muddy coast areas. Groins and groin fields achieve the purpose of protecting the coast by intercepting sediment. Therefore, for rivers with decreasing sediment transport volume year by year, such as the Yellow River, it is not conducive to groins intercepting a large amount of sediment to form a beach. Therefore, this protection method has deficiencies, especially for sandy coasts.

[0006] Third, offshore breakwaters. A breakwater built roughly parallel to the shoreline at a certain distance offshore is called an offshore breakwater, abbreviated as an offshore dyke. Its function is similar to that of a groin and can cause siltation of the shore beach on the upstream side of the offshore dyke. Large boulders or various concrete blocks can be used as the facing. However, the opening of the offshore dyke is small, and pollution is easy to accumulate in the bay and difficult to discharge. Therefore, when choosing an offshore dyke as a coastal protection project, environmental pollution problems should be considered.

[0007] Fourthly, artificial beach sand replenishment, which involves collecting suitable sand from the sea or land and replenishing it to the eroded shore beach, is the most natural countermeasure to address coastal erosion. Beach sand replenishment has proven to be an economical and effective measure, and its impact on the downstream shore beach is also smaller than that of other protective facilities. Since the sand artificially filled onto the beach will still be washed away under various marine environmental conditions, especially on sandy islands under the action of ocean waves, it is necessary to replenish the beach with sand every few years.

[0008] Although there are various forms of coastal protection projects, each has its own deficiencies. From the above comprehensive analysis, we can see that, firstly, except for the fourth measure of artificial beach sand replenishment, the remaining measures are all set in seawater and do not play a protective role in the beach above the high tide line, and sand grains will still be eroded by the wind and carried into the seawater; secondly, various dams have played the role of reducing waves and depositing sediment towards the shore, but at the same time, a large amount of sea sand is still washed back into the sea, and both sides of the dam play a role in blocking sediment, weakening the supply of sediment towards the shore and the deposition effect; in addition, various dams are rigid structures, generally only one is set, and the waves passing through the dam still have a large amount of energy and will still erode the coast, and the dam is costly and has a long construction period. Summary of the Invention

[0009] The main purpose of the present invention is to provide a suspended funnel-shaped sea sand trapping cage net and a coastal erosion protection system to overcome the deficiencies existing in the prior art.

[0010] To achieve the aforementioned invention purpose, the technical solutions adopted in the embodiments of the present invention include:

[0011] The embodiments of the present invention provide a suspended funnel-shaped sea sand trapping cage net, which includes more than one baffle and a trapping cage net. The baffle is arranged on the seaward side close to the trapping cage net through a fixing mechanism; the trapping cage net includes a connecting net, a funnel, and a connecting rope. The connecting rope is arranged on the connecting net, and the connecting rope is at least used to reinforce the connecting net. The connecting rope divides the connecting net into multiple connecting net units at equal intervals, and funnels are respectively arranged on each connecting net unit; the baffle includes a sand transporting and blocking plate and a base, and the sand transporting and blocking plate is connected and fixed to the base through a support column.

[0012] Further, the suspended funnel-shaped sea sand trapping cage net is arranged in the intertidal zone.

[0013] Further, the fixing mechanism includes a first connecting ring arranged at the top of the sand transporting and blocking plate, a plurality of second connecting rings arranged on the seaward side surface of the connecting net, and a connecting rod passing through the first connecting ring and the second connecting ring.

[0014] Further, small holes are opened at the edge of the funnel, and the funnel is tied and fixed to the connecting net through the small holes.

[0015] Further, a column is also provided at the intersection of the connecting ropes, and the suspended funnel-shaped sea sand trapping cage net is fixed on the seabed surface through the column.

[0016] Further, the sand transporting and blocking plate has a smooth streamline structure.

[0017] Further, the support column and the sand transporting and blocking plate are integrally formed by reinforced concrete casting, and the support column is arranged in the middle of the sand transporting and blocking plate and on the shoreward side of the sand transporting and blocking plate.

[0018] Further, fixing bolts and extension rods matching the fixing bolts are respectively provided at the bottoms of the sand transporting and blocking plate and the support column; the base is formed by connecting several blocks along the coastline direction, and adjacent two blocks are connected into one body through dovetail mortise and tenon mounting columns and mounting grooves, and each block top has a recessed mounting hole matching the bottom end of the extension rod.

[0019] The embodiment of the present invention also provides a coastal erosion protection system, including a giant kelp planting area, the suspended funnel-shaped sea sand trapping cage net, brush columns, hanging plate type one-way sand blocking barriers and N-shaped suspended storage sand fixing barriers arranged in sequence from the ocean direction to the land direction, and the giant kelp planting area, the suspended funnel-shaped sea sand trapping cage net, the brush columns, the hanging plate type one-way sand blocking barriers and the N-shaped suspended storage sand fixing barriers are respectively parallel to the coastline and arranged in multiple rows.

[0020] Further, the giant kelp planting area is distributed with culture ropes vertically arranged in the water area at a depth of 5-20 m below the lowest tide level line, and the culture ropes are used for planting giant kelp.

[0021] Further, the brush columns are arranged in a zigzag or wavy shape in multiple rows along the coast parallel direction in the intertidal zone.

[0022] Further, two adjacent brush columns are closely adjacent to each other, and the distance between each row is 1-3 m.

[0023] Further, the brush column includes a support column and filamentous brushes fixed on the support column, and the filamentous brushes include a plurality of filaments densely distributed along the length direction of the support column, and both ends of each filament extend to both sides of the support column.

[0024] Further, the hanging plate type one-way sand blocking barrier is arranged on the beach above the highest tide level line.

[0025] Further, the hanging plate type unidirectional sand barrier includes a plurality of columns arranged at intervals. The lower part of each column is fixedly connected to a base, and a plurality of hooks are further connected to both sides of each column. The plurality of hooks are arranged at intervals along the length direction of the column. A plurality of hanging plates and at least one blocking cross bar are also distributed between two adjacent columns. The hanging plates are arranged horizontally, and both ends of the upper edge are respectively connected to a column through at least one hook. At the same time, the lower edge of the hanging plate hangs vertically on the landward side. Any two adjacent hanging plates are arranged in parallel and partially overlap. The blocking cross bar is arranged on the seaward side of the lower edge of the bottommost hanging plate. When the wind blows from the landward side to sweep the hanging plate type unidirectional sand barrier, any two adjacent hanging plates are separated from each other, so that the sand grains carried by the wind are transported towards the land through the hanging plate type unidirectional sand barrier. When the wind blows from the seaward side to sweep the hanging plate type unidirectional sand barrier, any two adjacent hanging plates remain in an overlapping state, so as to block the sand grains carried by the wind from passing through the hanging plate type unidirectional sand barrier.

[0026] Further, the n-shaped suspended storage type sand fixation barrier is perpendicularly arranged on the beach above the highest tide level line along the main wind direction.

[0027] Further, the n-shaped suspended storage type sand fixation barrier includes a wire loop winding type three-dimensional net and a plurality of extendable columns movably connected to the wire loop winding type three-dimensional net. The wire loop winding type three-dimensional net is laid horizontally, and the two side edges naturally hang down, so as to form a structure with an n-shaped lateral cross section.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] (1) For the suspended funnel-shaped sea sand trapping cage net of the present invention, the baffle can prevent the sea waves from directly impacting the seabed frontally. The sediment passes through the surface of the baffle and falls into the seabed at the bottom of the funnel along with the water flow and waves. The trapping cage net is only open towards the land, forming a semi-closed sand collection space. The combination of the two constitutes a suspended funnel-shaped sea sand trapping cage net, which can collect the sediment transported towards the land and the sediment that retreats into the sea along with the tide. When the sand collection space is filled with sand, the overall lifting of the cage net and the baffle can be realized by raising the height of the fixed point between the lifting connecting rope and the column and installing an extension rod under the fixing bolt, so as to achieve the sustainable utilization of the device.

[0030] (2) In the coastal erosion protection system of the present invention, in seawater, giant kelps can reduce the energy of ocean currents and waves in the deep water area, and the trapping cages and nets can reduce the waves near the lowest tide level line, promoting the deposition of sediment in the cages and nets. The brush columns are mainly in the intertidal surf zone, weakening the waves and filtering and depositing sand particles; on the beach above the high tide line, the hanging plate type one-way sand barrier and the n-shaped suspended storage type sand fixation barrier respectively play the roles of unidirectionally blocking the wind-sand flow and long-term fixation of drifting sand. The five measures with different functions are arranged in multiple rows parallel to the coastline according to the beach topography and are combined with each other to form a coastal erosion protection system. From the nearshore seabed to the land beach, the onshore supply of water-sediment and wind-sand sediments is greater than the offshore loss, promoting the siltation of the seabed and the beach, continuously increasing the seabed surface and beach elevation, weakening the wave energy, and inhibiting the occurrence of coastal erosion; especially for sandy shorelines and islands, it is an effective measure for comprehensive management of nearshore water-sediment and wind-sand.

[0031] (3) In the coastal erosion protection system of the present invention, the giant kelp plants swing with the waves and ocean currents, forming a spectacular underwater forest, which can effectively slow down the impact of the waves on the coastline and is a natural breakwater; it can provide good habitats and foraging places for natural and cultured aquatic organisms near the shore, promoting the proliferation of marine biological resources and the sustainable development of the ecosystem.

[0032] (4) In the coastal erosion protection system of the present invention, the brush columns arranged densely in a zigzag or wavy shape can effectively slow down the impact and erosion of the waves in the surf zone on the coastline through the flexible blocking and filtering process of the brushes, filter and deposit particulate matter and prevent it from moving back into the sea, fixing it in the intertidal zone and playing the role of preventing scouring and accumulating the surface elevation of the surf zone; in addition, by manually lifting each independently arranged brush column, long-term treatment of the erosion in the surf zone can be achieved.

[0033] (5) In the coastal erosion protection system of the present invention, the hanging plate type one-way sand barrier has a simple structure and is convenient for construction and maintenance. Its one-way valve design enables sand transportation only towards the shore and not towards the sea. When the bottom baffle on the shore side of the sand barrier is buried, under the action of the onshore wind, the hanging plate is in an open state, and the sand grains on the accumulated side will be wind-eroded. Therefore, the risk of the sand barrier being buried itself is relatively low, and it has the characteristics of sand accumulation, reciprocating cycle of erosion and blowing, self-cleaning and long service life; under the action of multiple coastal wind directions, the sand grains move in a reciprocating cycle, and sand may accumulate on both sides of the bottom hanging plate of the sand barrier. When the sand surface rises to 2 / 3 of the height of the sand barrier, the buried bottom hanging plate can be dug out and hung on the hook at the upper end of the column, or a new hanging plate can be directly hung; therefore, the present invention can also achieve the purpose of reusing the hanging plate and the column, conveniently increasing the height of the sand barrier, extending the service life of the project, saving costs, and achieving the purpose of continuous surface elevation and siltation and land reclamation.

[0034] (6) The coastal erosion protection system of the present invention, in which the design of the N-shaped suspended tiled structure enables the sand-dust flow to smoothly enter the interior of the huge storage space inverted in the N-shape, and then the wind force is reduced by the swaying of the drooping edge, and the energy of the upper airflow is isolated and reduced through the sand barrier, and the energy of the airflow carrying sand at the bottom is exhausted under the action of the sand barrier and the ground friction, and the sedimentation effect of sand grains is significantly increased; the main material of the sand barrier itself has the three-dimensional structure characteristics of overall dense porosity, which is different from the sand barriers of the punching, mesh or plate gap types. When the sand-dust flow impacts any part of the sand barrier, dense irregular turbulent flows will be generated inside the wire loops, greatly consuming the speed and energy of the airflow, so sand grains are prone to sedimentation and fixation, and the wind resistance and sand accumulation efficiency are higher; in addition, the three-dimensional net of the sand barrier does not contact the sand surface, and the lifting operation can be easily carried out. For example, by lifting the three-dimensional net, lifting the original support columns, and sleeving new support columns, the sand barrier and the sand surface can always maintain a distance of 20-50 cm, avoiding the three-dimensional net of the sand barrier from contacting the sand surface, increasing the sand accumulation amount, extending the service life, and realizing continuous utilization; the lifting amplitude, that is, the corresponding sand accumulation thickness, can reach several meters to dozens of meters, which is much larger than the sand accumulation thickness of 10-30 cm of the traditional grid-shaped sand fixation barrier. Coupled with the layout width of 10-40 m, the sand accumulation amount far exceeds that of the traditional grid-shaped sand fixation barrier, and the service life is long; at the same time, the three-dimensional net used in the sand barrier has a large number of pores. Even if the sand barrier is buried by sand-dust, through lifting and shaking, the sand grains can flow out from the gaps, so it can be continuously lifted to achieve continuous utilization, or recycled after moving to another position. Description of the Drawings

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments recorded in the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0036] Figure 1 It is a schematic structural diagram of a suspended funnel-shaped sea sand trapping cage net in an embodiment of the present application.

[0037] Figure 2 is Figure 1 The connection structure schematic diagram of the support column of the baffle plate and the sand transportation and sand blocking plate in it.

[0038] Figure 3 is Figure 1 The side view of the base protruding mounting column of the baffle plate in it.

[0039] Figure 4 is Figure 1 The side view of the base sunken mounting groove of the baffle plate in it.

[0040] Figure 5 isFigure 1 Schematic diagram of the structure of the middle trapping cage net.

[0041] Figure 6 It is a schematic diagram of the structure of the coastal erosion protection system in an embodiment of the present application.

[0042] Figure 7 It is Figure 6 Schematic diagram of the structure of the middle brush column.

[0043] Figure 8 It is Figure 6 Top view of the middle brush column.

[0044] Figure 9 It is Figure 6 Schematic diagram of a layout structure of the middle brush column.

[0045] Figure 10 It is Figure 6 Another schematic diagram of the layout structure of the middle brush column.

[0046] Figure 11 It is Figure 6 Schematic diagram of the assembly process of the hanging plate type one-way sand barrier.

[0047] Figure 12 It is Figure 6 Front view of the hanging plate type one-way sand barrier in the closed state.

[0048] Figure 13 It is Figure 6 Front view of the hanging plate type one-way sand barrier in the open state.

[0049] Figure 14 It is Figure 6 Schematic diagram of the structure of the n-shaped suspended storage sand barrier.

[0050] Figure 15 It is Figure 14 The circular rubber sheet of the extendable column and the fixed wire loop winding type three-dimensional net in it.

[0051] Description of the reference numerals: 1. Hopper; 2. Connecting net; 3. Column; 4. Sand transportation and sand blocking plate; 41. First fixing bolt; 411. First extension rod; 42. Second fixing bolt; 412. Second extension rod; 5. Support column; 6. Base; 61. Dovetail mortise installation column; 62. Installation groove; 7. Seabed surface; 8. Highest tide level line; 9. Connecting rope; 101. First connecting ring; 102. Second connecting ring; 11. Connecting rod; 12. Brush column; 121. Support column; 122. Filamentous brush; 123. Fiber bundle; 13. Giant kelp; 131. Block; 132. Cultivation rope; 14. Hanging plate type one-way sand blocking barrier; 141. Column; 142. Hook; 143. Reinforcing cross bar; 144. Base; 146. Hanging plate body; 147. Blocking cross bar; 15. N-shaped suspended storage type sand fixation barrier; 151. Wire loop winding type three-dimensional net; 152. Extendable support column; 153. Circular rubber sheet; 154. Sagging part; 155. Main body part; 156. Ground; 16. Beach. Detailed implementation manners

[0052] The present invention will be more fully understood from the following detailed implementation manners, which should be read in conjunction with the accompanying drawings. Specific embodiments of the present invention are disclosed herein; however, it should be understood that the disclosed embodiments are merely exemplary of the present invention, and the present invention can be embodied in various forms. Therefore, the specific functional details disclosed herein should not be construed as limiting, but merely as a basis for the claims and as a representative basis for teaching those skilled in the art to employ the present invention in any appropriate detailed embodiment in different ways.

[0053] One aspect of an embodiment of the present invention provides a suspended funnel-shaped sea sand trapping cage net, including more than one baffle and a trapping cage net. The baffle is arranged on the seaward side close to the trapping cage net through a fixing mechanism; the trapping cage net includes a connecting net, a hopper and a connecting rope. The connecting rope is arranged on the connecting net, and the connecting rope is at least used to reinforce the connecting net. The connecting rope divides the connecting net into a plurality of connecting net units at equal intervals, and hoppers are respectively arranged on each connecting net unit; the baffle includes a sand transportation and sand blocking plate and a base, and the sand transportation and sand blocking plate is connected and fixed to the base through a support column.

[0054] In some preferred embodiments, the suspended funnel-shaped sea sand trapping cage net is arranged in an intertidal zone and in a strip-shaped area 20m - 100m away from the highest tide level line.

[0055] In some preferred embodiments, the fixing mechanism includes a first connecting ring arranged at the top of the sand transportation and sand blocking plate, a plurality of second connecting rings arranged on the seaward side surface of the connecting net, and a connecting rod passing through the first connecting ring and the second connecting ring.

[0056] In some preferred embodiments, small holes are provided at the edge of the funnel, and the funnel is tied and fixed to the connecting net through the small holes.

[0057] In some preferred embodiments, columns are further provided at the intersections of the connecting ropes, and the suspended funnel-shaped sea sand trapping cage net is fixed to the seabed surface through the columns.

[0058] In some preferred embodiments, the width of the trapping cage net in the direction perpendicular to the shoreline is 5 - 10 m.

[0059] In some preferred embodiments, the connecting net is made of HDPE net with a porosity of 10 - 20%.

[0060] In some preferred embodiments, the funnel is made of HDPE plates by hot melt pressing and film making.

[0061] In some preferred embodiments, the upper diameter of each funnel is 15 - 25 cm, the lower diameter is 3 - 5 cm, and the height is 15 - 20 cm.

[0062] In some preferred embodiments, the diameter of the column is 3 - 6 cm, and the height is 1.5 - 2 m, so that the trapping cage net floats 50 - 100 cm above the seabed surface.

[0063] In some preferred embodiments, the sand transporting and blocking plate has a smooth streamline structure.

[0064] In some preferred embodiments, the pillar and the sand transporting and blocking plate are an integrally formed structure by reinforced concrete casting, and the pillar is arranged in the middle of the sand transporting and blocking plate and on the shoreward side of the sand transporting and blocking plate.

[0065] In some preferred embodiments, fixing bolts and extension rods matched with the fixing bolts are respectively provided at the bottoms of the sand transporting and blocking plate and the pillar; the base is formed by connecting several blocks along the shoreline direction, and adjacent two blocks are connected into one body through dovetail mortise and tenon installation columns and installation grooves, and each block top has a concave installation hole matched with the bottom end of the extension rod.

[0066] In some preferred embodiments, the width of the sand transporting and blocking plate in the direction perpendicular to the shoreline is 1.5 - 2.5 m, the thickness is 5 - 10 cm, and the height is 50 - 100 cm.

[0067] The suspended funnel-shaped sea sand trapping cage net provided by the embodiment of the present invention, wherein the baffle can prevent the sea waves from directly impacting the seabed frontally, and the sediment passes through the surface of the baffle and falls onto the seabed surface at the bottom of the funnel along with the water flow and waves; the trapping cage net is only open towards the shore, forming a semi-closed sand collection space. The combined suspended funnel-shaped sea sand trapping cage net can collect the sediment transported towards the shore and the sediment that retreats into the sea along with the ebb tide; when the sand collection space is full of sand, the overall lifting of the cage net and the baffle can be realized by raising the height of the fixed point between the connecting rope and the upright column and installing an extension rod under the fixing bolt, so as to achieve the sustainable utilization of the device.

[0068] Another aspect of the embodiment of the present invention provides a coastal erosion protection system, which includes a giant kelp planting area, the above-mentioned suspended funnel-shaped sea sand trapping cage net, a brush column, a hanging plate type one-way sand barrier and an n-shaped suspended storage type sand fixation barrier arranged in sequence from the ocean direction towards the land direction. The giant kelp planting area, the suspended funnel-shaped sea sand trapping cage net, the brush column, the hanging plate type one-way sand barrier and the n-shaped suspended storage type sand fixation barrier are respectively parallel to the coastline and arranged in multiple rows.

[0069] In some preferred embodiments, the giant kelp planting area is distributed with cultivation ropes vertically arranged in the water area at a depth of 5-20 m below the lowest tide level line, and the cultivation ropes are used for planting giant kelp; preferably, every 2 m long cultivation rope clips 15-20 artificially cultivated giant kelp seedlings with a length of 15 cm; preferably, the diameter of the cultivation rope is 3-4 cm and the length is 5-20 m, and the bottom of the cultivation rope is fixed on the building blocks buried in the seabed.

[0070] In some preferred embodiments, the brush columns are arranged in multiple zigzag or wavy rows along the coastal parallel direction in the intertidal zone.

[0071] In some preferred embodiments, two adjacent brush columns are closely adjacent to each other, and the distance between each row is 1-3 m.

[0072] In some preferred embodiments, the brush column includes a support column and filamentous brushes fixed on the support column. The filamentous brushes include a plurality of filament bundles densely distributed along the length direction of the support column, and both ends of each filament bundle extend to both sides of the support column.

[0073] In some preferred embodiments, the diameter of the filamentous brush is 25-50 cm and the length is 60-100 cm.

[0074] In some preferred embodiments, the length of both ends of each filament bundle extending to both sides of the support column is 10-20 cm.

[0075] In some preferred embodiments, the filament bundle is composed of multiple nylon filaments, the diameter of the nylon filament is 0.5-1 mm, and the diameter of the filament bundle is 3-5 mm.

[0076] In some preferred embodiments, the diameter of the support column is 5 - 10 cm, the length is 1.3 - 1.7 m, and the depth buried in the seabed at the bottom is 70 cm.

[0077] In some preferred embodiments, the support column may include a solid cylinder made of PVC material, but is not limited thereto.

[0078] In some preferred embodiments, the hanging plate type unidirectional sand barrier is arranged on the beach above the highest high tide line.

[0079] In some preferred embodiments, the hanging plate type unidirectional sand barrier includes a plurality of upright columns arranged at intervals. The lower part of each upright column is fixedly connected to a base, and a plurality of hooks are also connected to both sides of each upright column. The plurality of hooks are arranged at intervals along the length direction of the upright column. A plurality of hanging plates and at least one blocking cross bar are also distributed between two adjacent upright columns. The hanging plates are arranged horizontally, and the two ends of the upper edge are respectively connected to an upright column through at least one hook. At the same time, the lower edge of the hanging plate hangs down on the landward side. Any two adjacent hanging plates are arranged in parallel and partially overlap. The blocking cross bar is arranged on the seaward side of the lower edge of the bottommost hanging plate; when the wind blows from the landward side to sweep the hanging plate type unidirectional sand barrier, any two adjacent hanging plates are separated from each other, so that the sand grains carried by the wind are transported towards the land through the hanging plate type unidirectional sand barrier; and when the wind blows from the seaward side to sweep the hanging plate type unidirectional sand barrier, any two adjacent hanging plates remain in an overlapping state, so as to block the sand grains carried by the wind from passing through the hanging plate type unidirectional sand barrier.

[0080] In some preferred embodiments, there are multiple hanging plate type unidirectional sand barriers, and the distance between two adjacent hanging plate type unidirectional sand barriers is 10 m - 50 m.

[0081] In some preferred embodiments, the height of the upright column is 1.3 m - 3 m, and the cross section is 15 cm × 15 cm.

[0082] In some preferred embodiments, the height of the base is 0.7 m - 1 m, and the cross section is 30 cm × 30 cm.

[0083] In some preferred embodiments, the distance between two adjacent upper and lower hooks is 15 cm - 20 cm.

[0084] In some preferred embodiments, the hook may include a reinforcing steel ring hook, but is not limited thereto.

[0085] In some preferred embodiments, the upright column may include a concrete upright column, but is not limited thereto.

[0086] In some preferred embodiments, the hanging plate includes a hanging plate body and a reinforcing cross bar disposed at the top of the hanging plate body, and the ends of the reinforcing cross bar extend beyond both ends of the hanging plate body for hanging on a hook.

[0087] In some preferred embodiments, the reinforcing cross bar and the hanging plate body are adhesively bonded together in a wrapped manner by a hot melting method.

[0088] In some preferred embodiments, the width of the hanging plate body is 15 cm - 20 cm, and the thickness is 2 mm - 3 mm.

[0089] In some preferred embodiments, the diameter of the reinforcing cross bar is 1 - 2 cm, and the distance from the end of the reinforcing cross bar to the corresponding end of the hanging plate body is 1.5 cm.

[0090] In some preferred embodiments, the width of the overlapping part of any two adjacent hanging plates is 2 cm - 4 cm.

[0091] In some preferred embodiments, the hanging plate body may include a polyethylene plate, but is not limited thereto.

[0092] In some preferred embodiments, the reinforcing cross bar may include a steel bar, but is not limited thereto.

[0093] In some preferred embodiments, the diameter of the blocking cross bar is 1 - 2 cm.

[0094] In some preferred embodiments, the blocking cross bar may include a steel bar, but is not limited thereto.

[0095] In some preferred embodiments, for the island shoreline, the hanging plate type one-way sand barrier is arranged in a surrounding multi-channel manner.

[0096] In some preferred embodiments, the n-shaped suspended storage type sand fixation barrier is arranged perpendicular to the main wind direction on the beach above the highest tide level line.

[0097] In some preferred embodiments, the n-shaped suspended storage type sand fixation barrier includes a wire coil wound three-dimensional net and a plurality of extendable columns movably connected to the wire coil wound three-dimensional net, and the wire coil wound three-dimensional net is laid horizontally and the two side edge parts naturally droop, thereby forming a structure with an n-shaped lateral cross section.

[0098] In some preferred embodiments, the distance between the main body part of the wire coil wound three-dimensional net and the ground is 20 - 50 cm, and the distance between the lower edge of the drooping part and the ground is 10 - 20 cm.

[0099] In some preferred embodiments, two circular rubber sheets are sleeved on each extendable column, and the wire loop-wound three-dimensional net is fixed between the two circular rubber sheets. The circular rubber sheets have a thickness of 1-2 cm, an inner diameter of 2-3 cm, and an outer diameter of 5-10 cm.

[0100] In some preferred embodiments, multiple n-shaped suspended storage sand fixation barriers are arranged, and the distance between two adjacent n-shaped suspended storage sand fixation barriers is 10-40 m.

[0101] In some preferred embodiments, when the top of the sand accumulation surface is close to the bottom surface of the main body of the wire loop-wound three-dimensional net, the height of the wire loop-wound three-dimensional net connected to the extendable column is increased, or the height of the extendable column is increased, or another extendable column is connected to the top end of the extendable column, so as to lift the n-shaped suspended storage sand fixation barrier.

[0102] In the coastal erosion prevention system provided by the embodiments of the present invention, in seawater, giant algae can reduce the energy of ocean currents and waves in the deep water area, the capture cage net reduces the waves near the lowest tide level line, promotes the deposition of sediment in the cage net, and the brush column mainly weakens the waves, filters and deposits sand particles in the intertidal breaking wave zone; on the beach above the high tide line, the hanging plate type one-way sand blocking barrier and the n-shaped suspended storage sand fixation barrier respectively play the roles of unidirectionally blocking the wind-sand flow and long-term fixing of the flowing sand; the five measures with different functions are arranged in multiple rows parallel to the coastline according to the beach topography, and are combined with each other to form a coastal erosion prevention system, which makes the onshore supply of water-sand and wind-sand sediments greater than the offshore loss from the nearshore seabed to the land beach, promotes the siltation of the seabed and the beach, continuously increases the seabed surface and beach elevation, weakens the wave energy, and inhibits the occurrence of coastal erosion; especially for sandy shorelines, it is an effective measure for comprehensive management of nearshore water-sand and wind-sand.

[0103] Example 1

[0104] Refer to Figures 1 - 5 , the embodiments of the present invention provide a suspended funnel-shaped sea sand capture cage net, which includes more than one baffle and a capture cage net. The baffle is arranged on the seaward side close to the capture cage net through a fixing mechanism; wherein, the capture cage net includes a connecting net 2, a funnel 1 and a connecting rope 9. A connecting rope 9 is arranged on the connecting net 2. The connecting rope 9 is at least used to reinforce the connecting net 2. The connecting rope 9 divides the connecting net 2 into multiple connecting net units at equal intervals, and funnels 1 are respectively arranged on each connecting net unit; the baffle includes a sand transporting and blocking plate 4 and a base 6, and the sand transporting and blocking plate 4 is connected and fixed to the base 6 through a support column 5.

[0105] In the specific implementation process, the suspended funnel-shaped sea sand trapping cage net is arranged in the intertidal zone within a strip area 820 m - 100 m away from the highest tide level line. The fixing mechanism includes a first connecting ring 101 provided at the top of the sand transporting and blocking plate 4, a plurality of second connecting rings 102 provided on the seaward side surface of the connecting net 2, and a connecting rod 11 passing through the first connecting ring 101 and the second connecting ring 102; small holes are opened at the edge of the funnel 1, and the funnel 1 is tied and fixed to the connecting net 2 through the small holes; a column 3 is also provided at the intersection of the connecting ropes 9, and the suspended funnel-shaped sea sand trapping cage net is fixed on the seabed surface 7 through the column 3.

[0106] During the implementation process, the width of the trapping cage net along the direction perpendicular to the shoreline is 5 - 10 m. The connecting net 2 is made of HDPE net with a porosity of 10 - 20%. The funnel 1 is made by hot-melting and pressing HDPE plates. The upper diameter of each funnel is 15 - 25 cm, the lower diameter is 3 - 5 cm, and the height is 15 - 20 cm. The diameter of the column 3 is 3 - 6 cm, and the height is 1.5 - 2 m, so that the trapping cage net floats 50 - 100 cm above the seabed surface; the sand transporting and blocking plate 4 has a smooth streamline structure. The width of the sand transporting and blocking plate 4 along the direction perpendicular to the shoreline is 1.5 - 2.5 m, the thickness is 5 - 10 cm, and the height is 50 - 100 cm; the support column 5 and the sand transporting and blocking plate 4 are integrally formed by reinforced concrete casting, and the support column 5 is arranged in the middle of the sand transporting and blocking plate 4 and on the shoreward side of the sand transporting and blocking plate 4. First fixing bolts 41 and second fixing bolts 42 are respectively provided at the bottoms of the sand transporting and blocking plate 4 and the support column 5, and first extension rods 411 and second extension rods 412 respectively cooperating with the first fixing bolts 41 and the second fixing bolts 42; the base 6 is formed by connecting a plurality of blocks along the shoreline direction. Adjacent two blocks are connected into one body through dovetail mortise mounting columns 61 and mounting grooves 62, and each block top has a recessed mounting hole cooperating with the bottoms of the first fixing bolts 41 and the second fixing bolts 42 (or the first extension rods 411 and the second extension rods 412).

[0107] Embodiment 2

[0108] Refer to Figure 6 As shown in, the embodiment of the present invention provides a coastal erosion protection system, including a giant kelp planting area, a suspended funnel-shaped sea sand trapping cage net, a brush column 12, a hanging plate type one-way sand blocking barrier 14, and an n-shaped suspended storage type sand fixation barrier 15 arranged in sequence from the ocean direction to the land direction. The giant kelp planting area, the suspended funnel-shaped sea sand trapping cage net, the brush column 12, the hanging plate type one-way sand blocking barrier 14, and the n-shaped suspended storage type sand fixation barrier 15 are respectively parallel to the coastline and arranged in multiple rows.

[0109] During the specific implementation process, in the kelp cultivation area, there are cultivation ropes 132 vertically arranged in the water area at a depth of 5-20 m below the lowest tide level. The cultivation ropes 132 are used for cultivating kelp 13. Preferably, every 2 m long cultivation rope 132 clips 15-20 artificially cultivated 15 cm long kelp seedlings; the diameter of the cultivation rope 132 is 3-4 cm, and the length is 5-20 m. And the bottom of the cultivation rope 132 is fixed on the building block 131 buried in the seabed.

[0110] Refer to Figures 9 - 10 , the brush columns 12 are arranged in a zigzag or wavy pattern in multiple rows along the coastal parallel direction in the intertidal zone. Two adjacent brush columns 12 are closely adjacent to each other, and the distance between each row is 1-3 m. Refer to Figure 7 and Figure 8 , the brush column 12 includes a support column 121 and a filamentous brush 122 fixed on the support column 121. The filamentous brush 122 includes a plurality of filament bundles 123 densely distributed along the length direction of the support column 121. Both ends of each filament bundle 123 extend to both sides of the support column 121. The diameter of the filamentous brush 122 is 25-50 cm, and the length is 60-100 cm. The length of both ends of each filament bundle 123 extending to both sides of the support column 121 is 10-20 cm. The filament bundle 123 is composed of multiple nylon filaments. The diameter of the nylon filament is 0.5-1 mm, the diameter of the filament bundle 123 is 3-5 mm, the diameter of the support column 121 is 5-10 cm, the length is 1.3-1.7 m, and the depth of the bottom buried in the seabed is 70 cm. During the implementation process, the support column 121 is a solid cylinder made of PVC material.

[0111] Refer to Figures 11 - 13 , the hanging plate type one-way sand barrier 14 is arranged on the beach 16 above the highest tide level 8. The hanging plate type one-way sand barrier 14 includes a plurality of upright columns 141 arranged at intervals. The lower part of each upright column 141 is fixedly connected to the base 144, and a plurality of hooks 142 are also connected to both sides of each upright column 144. The plurality of hooks 142 are arranged at intervals along the length direction of the upright column 144. A plurality of hanging plates and at least one blocking cross bar 147 are also distributed between two adjacent upright columns 144. The hanging plates are arranged horizontally, and both ends of the upper edge are respectively connected to an upright column 144 through at least one hook 142. At the same time, the lower edge of the hanging plate hangs down on the landward side. Any two adjacent hanging plates are arranged in parallel and partially overlap. The blocking cross bar 147 is arranged on the seaward side of the lower edge of the bottommost hanging plate; when the onshore wind blows the hanging plate type one-way sand barrier, it makes any two adjacent hanging plates separate from each other, so that the sand grains carried by the wind are transported towards the land through the hanging plate type one-way sand barrier 14; and when the seaward wind blows the hanging plate type one-way sand barrier 14, it makes any two adjacent hanging plates keep overlapping, so as to block the sand grains carried by the wind from passing through the hanging plate type one-way sand barrier 14.

[0112] There are multiple hanging plate type one-way sand barriers 14, and the distance between two adjacent hanging plate type one-way sand barriers 14 is 10 m - 50 m. The height of the column 141 is 1.3 m - 3 m, and its cross-section is 15 cm × 15 cm. The height of the base 144 is 0.7 m - 1 m, and its cross-section is 30 cm × 30 cm. The distance between two adjacent upper and lower hooks 142 is 15 cm - 20 cm. The hook 142 is a reinforcing bar circular ring hook. The column 141 is a concrete column. The hanging plate includes a hanging plate body 146 and a reinforcing cross bar 143 arranged at the top of the hanging plate body 146, and the ends of the reinforcing cross bar 143 extend beyond both ends of the hanging plate body 146 for hanging on the hook 142. During specific implementation, the reinforcing cross bar 143 and the hanging plate body 146 are adhesively bonded together in a wrapped manner by a hot melting method.

[0113] In the embodiment, the width of the hanging plate body 146 is 15 cm - 20 cm, the thickness is 2 mm - 3 mm, the diameter of the reinforcing cross bar 143 is 1 - 2 cm, and the distance from the end of the reinforcing cross bar 143 to the corresponding end of the hanging plate body 146 is 1.5 cm. The width of the overlapping part between any two adjacent hanging plates is 2 cm - 4 cm. The hanging plate body 146 is made of a polyethylene plate, the reinforcing cross bar 143 is made of reinforcing bar, the diameter of the blocking cross bar 147 is 1 - 2 cm, and the blocking cross bar 147 is made of reinforcing bar. For the island shoreline, the hanging plate type one-way sand barriers 14 are arranged in a surrounding multiple - row pattern.

[0114] Refer to Figure 14 , the n - shaped suspended storage type sand fixation barrier 15 is perpendicularly arranged on the beach 16 above the highest high - tide line 8 along the main wind direction. The n - shaped suspended storage type sand fixation barrier 15 includes a wire - loop - wound three - dimensional net 151 and a plurality of extendable columns 152 movably connected to the wire - loop - wound three - dimensional net 151. The wire - loop - wound three - dimensional net 151 is laid horizontally and the two side edges naturally droop, thus forming a structure with an n - shaped lateral cross - section. The distance between the main body part 155 of the wire - loop - wound three - dimensional net 151 and the ground 156 is 20 - 50 cm, and the distance between the lower edge of the drooping part 154 and the ground 156 is 10 - 20 cm. Two circular rubber sheets 153 are sleeved on each extendable column 152. As Figure 15 shown, the wire - loop - wound three - dimensional net 151 is fixed between the two circular rubber sheets 153, and the thickness of the circular rubber sheet 153 is 1 - 2 cm, the inner diameter is 2 - 3 cm, and the outer diameter is 5 - 10 cm.

[0115] In the specific implementation process, multiple n-shaped suspended storage sand fixation barriers 15 are arranged, and the distance between two adjacent n-shaped suspended storage sand fixation barriers 15 is 10 - 40 m; when the top of the sand accumulation surface approaches the bottom surface of the main body of the wire loop-wound three-dimensional net, the height of the wire loop-wound three-dimensional net 151 connected to the extendable column 152 is increased, or the height of the extendable column 152 is increased, or another extendable column 152 is connected to the top end of the extendable column 152, so as to raise the n-shaped suspended storage sand fixation barrier 15.

[0116] In addition, the inventor of this case also referred to the foregoing embodiments and conducted tests with other raw materials, process operations, and process conditions described in this specification, and all obtained relatively ideal results.

[0117] Although the present invention has been described with reference to the illustrative embodiments, those skilled in the art will understand that various other changes, omissions and / or additions can be made without departing from the spirit and scope of the present invention, and the elements of the embodiments can be replaced with substantial equivalents. In addition, many modifications can be made without departing from the scope of the present invention to adapt a particular situation or material to the teachings of the present invention. Therefore, it is not intended to limit the present invention to the specific embodiments disclosed for carrying out the present invention, but it is intended that the present invention will include all embodiments falling within the scope of the appended claims. In addition, unless specifically stated, any use of the terms first, second, etc. does not indicate any order or importance, but the terms first, second, etc. are used to distinguish one element from another element.

Claims

1. A floating funnel-shaped sea sand trapping cage net, characterized in that, it includes more than one baffle and a trapping cage net. The baffle is arranged on the seaward side close to the trapping cage net through a fixing mechanism. The trapping cage net includes a connecting net, a funnel and connecting ropes. Connecting ropes are arranged on the connecting net. The connecting ropes are at least used to reinforce the connecting net. The connecting ropes divide the connecting net into multiple connecting net units at equal intervals, and funnels are respectively arranged on each connecting net unit. The baffle includes a sand transporting and blocking plate and a base. The sand transporting and blocking plate is connected and fixed to the base through a support column. The sand transporting and blocking plate has a smooth streamline structure. The support column and the sand transporting and blocking plate are an integrally formed structure cast by reinforced concrete. The support column is arranged in the middle of the sand transporting and blocking plate and on the landward side of the sand transporting and blocking plate. Fixing bolts and extension rods matched with the fixing bolts are respectively arranged at the bottoms of the sand transporting and blocking plate and the support column. The base is formed by connecting several blocks along the coastline direction. Adjacent two blocks are connected and formed into a whole through a dovetail mortise installation column and an installation groove. And each block top has a concave installation hole matched with the bottom end of the extension rod.

2. The floating funnel-shaped sea sand trapping cage net according to claim 1, characterized in that: the floating funnel-shaped sea sand trapping cage net is arranged in the intertidal zone and in a strip-shaped area 20m - 100m away from the highest tide level line.

3. The floating funnel-shaped sea sand trapping cage net according to claim 1, characterized in that: the fixing mechanism includes a first connecting ring arranged at the top of the sand transporting and blocking plate, a plurality of second connecting rings arranged on the seaward side surface of the connecting net, and a connecting rod passing through the first connecting ring and the second connecting rings.

4. The floating funnel-shaped sea sand trapping cage net according to claim 1, characterized in that: small holes are opened at the edge of the funnel, and the funnel is tied and fixed to the connecting net through the small holes.

5. The floating funnel-shaped sea sand trapping cage net according to claim 1, characterized in that: upright columns are also arranged at the intersections of the connecting ropes, and the floating funnel-shaped sea sand trapping cage net is fixed on the seabed surface through the upright columns.

6. The floating funnel-shaped sea sand trapping cage net according to claim 2, characterized in that: the width of the trapping cage net along the direction perpendicular to the coastline is 5 - 10m.

7. The floating funnel-shaped sea sand trapping cage net according to claim 2, characterized in that: the connecting net adopts an HDPE net with a porosity of 10 - 20%.

8. The floating funnel-shaped sea sand trapping cage net according to claim 2, characterized in that: the funnel is made of HDPE plates by hot melt pressing and forming.

9. The floating funnel-shaped sea sand trapping cage net according to claim 2, characterized in that: the upper aperture of each funnel is 15 - 25cm, the lower aperture is 3 - 5cm, and the height is 15 - 20cm.

10. The floating funnel-shaped sea sand trapping cage net according to claim 5, characterized in that: the diameter of the upright column is 3 - 6cm, and the height is 1.5 - 2m, so that the trapping cage net floats 50 - 100cm above the seabed surface.

11. The floating funnel-shaped sea sand trapping cage net according to claim 1, characterized in that: The width of the sand transportation and sediment interception board perpendicular to the shoreline direction is 1.5 - 2.5 m, the thickness is 5 - 10 cm, and the height is 50 - 100 cm.

12. A coastal erosion protection system, characterized in that, it includes a giant kelp planting area, a suspended funnel-shaped sea sand trapping cage net as described in any one of claims 1 - 11, a brush column, a hanging plate type one-way sand barrier, and an n-shaped suspended storage sand barrier arranged in sequence from the ocean direction to the land direction. The giant kelp planting area, the suspended funnel-shaped sea sand trapping cage net, the brush column, the hanging plate type one-way sand barrier, and the n-shaped suspended storage sand barrier are respectively parallel to the coastline and arranged in multiple rows.

13. The coastal erosion protection system according to claim 12, characterized in that: The giant kelp planting area is distributed with cultivation ropes vertically arranged in the water area at a depth of 5 - 20 m below the lowest tide level line, and the cultivation ropes are used for planting giant kelp.

14. The coastal erosion protection system according to claim 13, characterized in that: Every 2 m long cultivation rope clips 15 - 20 artificially cultivated giant kelp seedlings with a length of 15 cm.

15. The coastal erosion protection system according to claim 13, characterized in that: The diameter of the cultivation rope is 3 - 4 cm, the length is 5 - 20 m, and the bottom of the cultivation rope is fixed on the blocks buried in the seabed.

16. The coastal erosion protection system according to claim 12, characterized in that: The brush columns are arranged in multiple rows in a zigzag or wavy shape along the coastal parallel direction in the intertidal zone.

17. The coastal erosion protection system according to claim 12, characterized in that: Two adjacent brush columns are closely adjacent to each other, and the spacing between each row is 1 - 3 m.

18. The coastal erosion protection system according to claim 12, characterized in that: The brush column includes a support column and filamentous brushes fixed on the support column. The filamentous brushes include a plurality of filaments densely distributed along the length direction of the support column, and both ends of each filament extend to both sides of the support column.

19. The coastal erosion protection system according to claim 18, characterized in that: The diameter of the filamentous brush is 25 - 50 cm, and the length is 60 - 100 cm.

20. The coastal erosion protection system according to claim 18, characterized in that: The length of both ends of each filament extending to both sides of the support column is 10 - 20 cm.

21. The coastal erosion protection system according to claim 18, characterized in that: The filament is composed of multiple nylon wires, the diameter of the nylon wire is 0.5 - 1 mm, and the diameter of the filament is 3 - 5 mm.

22. The coastal erosion protection system according to claim 18, characterized in that: The diameter of the support column is 5 - 10 cm, the length is 1.3 - 1.7 m, and the depth of the bottom buried in the seabed is 70 cm.

23. The coastal erosion protection system according to claim 18, characterized in that: The support column is a solid cylinder made of PVC material.

24. The coastal erosion protection system according to claim 12, characterized in that: The hanging plate type one-way sand barrier is arranged on the beach above the highest tide level line.

25. The coastal erosion protection system according to claim 24, characterized in that: The hanging plate type unidirectional sand barrier includes a plurality of upright columns arranged at intervals. The lower part of each upright column is fixedly connected to a base, and a plurality of hooks are further connected to both sides of each upright column. The plurality of hooks are arranged at intervals along the length direction of the upright column. A plurality of hanging plates and at least one blocking cross bar are also distributed between two adjacent upright columns. The hanging plates are arranged horizontally, and both ends of the upper edge are respectively connected to an upright column through at least one hook. At the same time, the lower edge of the hanging plate hangs vertically on the landward side. Any two adjacent hanging plates are arranged in parallel and partially overlap. The blocking cross bar is arranged on the seaward side of the lower edge of the bottommost hanging plate; when the wind blows from the landward side to sweep the hanging plate type unidirectional sand barrier, any two adjacent hanging plates are separated from each other, so that the sand grains carried by the wind are transported towards the land through the hanging plate type unidirectional sand barrier; and when the wind blows from the seaward direction to sweep the hanging plate type unidirectional sand barrier, any two adjacent hanging plates remain in an overlapping state, so as to block the sand grains carried by the wind from passing through the hanging plate type unidirectional sand barrier.

26. The coastal erosion protection system according to claim 12, characterized in that: There are multiple hanging plate type unidirectional sand barriers, and the distance between two adjacent hanging plate type unidirectional sand barriers is 10m - 50m.

27. The coastal erosion protection system according to claim 25, characterized in that: The height of the upright column is 1.3m - 3m, and the cross section is 15cm × 15cm.

28. The coastal erosion protection system according to claim 25, characterized in that: The height of the base is 0.7m - 1m, and the cross section is 30cm × 30cm.

29. The coastal erosion protection system according to claim 25, characterized in that: The distance between two adjacent upper and lower hooks is 15cm - 20cm.

30. The coastal erosion protection system according to claim 25, characterized in that: The hook includes a reinforcing steel ring hook.

31. The coastal erosion protection system according to claim 25, characterized in that: The upright column includes a concrete upright column.

32. The coastal erosion protection system according to claim 25, characterized in that: The hanging plate includes a hanging plate body and a reinforcing cross bar arranged at the top of the hanging plate body. The end of the reinforcing cross bar extends out of both ends of the hanging plate body for hanging on the hook.

33. The coastal erosion protection system according to claim 32, characterized in that: The reinforcing cross bar and the hanging plate body are adhesively bonded together in a wrapped manner by a hot melting method.

34. The coastal erosion protection system according to claim 32, characterized in that: The width of the hanging plate body is 15cm - 20cm, and the thickness is 2mm - 3mm.

35. The coastal erosion protection system according to claim 32, characterized in that: The diameter of the reinforcing cross bar is 1 - 2cm, and the distance between the end of the reinforcing cross bar and the corresponding end of the hanging plate body is 1.5cm.

36. The coastal erosion protection system according to claim 25, characterized in that: The width of the overlapping part of any two adjacent hanging plates is 2cm - 4cm.

37. The coastal erosion protection system according to claim 32, characterized in that: the hanging plate body comprises a polyethylene plate.

38. The coastal erosion protection system according to claim 32, characterized in that: the reinforcing cross bar comprises a steel bar.

39. The coastal erosion protection system according to claim 25, characterized in that: the diameter of the blocking cross bar is 1 - 2 cm.

40. The coastal erosion protection system according to claim 25, characterized in that: the blocking cross bar comprises a steel bar.

41. The coastal erosion protection system according to claim 12, characterized in that: for the island shoreline, the hanging plate type one-way sand barrier is arranged in a surrounding multi-channel manner.

42. The coastal erosion protection system according to claim 12, characterized in that: the n-shaped suspended storage type sand fixation barrier is arranged perpendicular to the main wind direction on the beach above the highest tide level line.

43. The coastal erosion protection system according to claim 42, characterized in that: the n-shaped suspended storage type sand fixation barrier comprises a wire loop winding type three-dimensional net and a plurality of extendable columns movably connected to the wire loop winding type three-dimensional net, wherein the wire loop winding type three-dimensional net is laid horizontally and the two side edge parts naturally droop, thereby forming a structure with an n-shaped lateral cross section.

44. The coastal erosion protection system according to claim 43, characterized in that: the distance between the main body part of the wire loop winding type three-dimensional net and the ground is 20 - 50 cm, and the distance between the lower edge of the drooping part and the ground is 10 - 20 cm.

45. The coastal erosion protection system according to claim 43, characterized in that: each extendable column is sleeved with two circular rubber sheets, the wire loop winding type three-dimensional net is fixed between the two circular rubber sheets, and the thickness of the circular rubber sheet is 1 - 2 cm, the inner diameter is 2 - 3 cm, and the outer diameter is 5 - 10 cm.

46. The coastal erosion protection system according to claim 43, characterized in that: the n-shaped suspended storage type sand fixation barrier is arranged in multiple channels, and the distance between two adjacent n-shaped suspended storage type sand fixation barriers is 10 - 40 m.

47. The coastal erosion protection system according to claim 43, characterized in that: when the top of the sand accumulation surface approaches the bottom surface of the main body part of the wire loop winding type three-dimensional net, the height of the wire loop winding type three-dimensional net connected to the extendable column is lifted, or the height of the extendable column is lifted, or another extendable column is connected to the top end of the extendable column, so as to lift the n-shaped suspended storage type sand fixation barrier.

Images