A flexible protection system that promotes siltation and land reclamation in a near-natural way

Abstract

The present invention discloses a flexible protection system for near-natural siltation and land reclamation. The flexible protection system for near-natural siltation and land reclamation includes a directional opening and closing brush fence, a seabed surface covering net, and a sand-blocking and sand-dredging integrated one-way sand barrier arranged parallel to the coastline; the seabed surface covering net is arranged on the seaward side of the directional opening and closing brush fence, the directional opening and closing brush fence is distributed in the intertidal zone, the sand-blocking and sand-dredging integrated one-way sand barrier is distributed above the highest tide line, and the seabed surface covering net is laid close to the seabed surface and is in a semi-floating state in the seawater. The directional opening and closing brush fence provided in the embodiment of the present invention has a simple structure and is easy to use. The flexible protection system formed by combining it with the sand-blocking and sand-dredging integrated one-way sand barrier and the seabed surface covering net can achieve one-way interception of sand in both seawater and on land, and can promote the sedimentation process of sand on the land side, thereby achieving the near-natural and flexible purpose of promoting siltation and land reclamation.

Description

Technical Field

[0001] The invention belongs to the technical field of coastal ecological environment management, and specifically relates to a flexible protection system for near-natural siltation and land reclamation. Background Art

[0002] Among marine disasters, coastal erosion, which has a global trend, has attracted widespread attention. Coastal erosion refers to the destructive process of coastal retreat caused by the lack of coastal sand supply and coastal sand loss under the action of ocean dynamics. Therefore, it is very necessary to develop methods for promoting siltation and land reclamation suitable for sandy coasts and islands.

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

[0004] First, seawalls are a traditional method of coastal protection. They are built in areas with higher beaches and are used to separate coastal land and sea areas. They are generally parallel to the coastline. Although they play a great role in fixing the coast and preventing moisture and waves, they are generally not used for beach protection and are not suitable as a long-term wave protection method, unless they are used as an auxiliary or emergency measure under other engineering measures. Therefore, this type of engineering structure is generally only suitable for coasts with small waves or silted coasts to prevent abnormal sea subsidence;

[0005] Second, spur dikes and spur dike groups are coastal structures that are nearly perpendicular to the coastline. Their function is to intercept the silt transported from the upstream coast to form a wide beach and protect the coast. Spur dikes have a relatively mature application on muddy coasts and can be used in muddy coastal areas. Spur dikes and spur dike groups rely on intercepted silt to achieve the purpose of protecting the coast. Therefore, for rivers with decreasing sediment transport volume year by year, such as the Yellow River, it is not conducive for spur dikes to intercept a large amount of silt to form a beach. Therefore, this protection method has shortcomings, especially for sandy coasts;

[0006] Third, offshore breakwaters are breakwaters built in the sea area at a certain distance from the coastline and roughly parallel to the coastline. They are called offshore breakwaters, or offshore breakwaters for short. Their function is similar to that of groins, and they can cause siltation on the upstream side of the offshore breakwater. Large stones or various concrete blocks can be used as protective surfaces. However, the opening of the offshore breakwater is small, and pollution is easy to accumulate in the bay and difficult to discharge. Therefore, when choosing an offshore breakwater as a coastal protection project, environmental pollution issues should be considered;

[0007] Fourth, artificial river beach sand replenishment, collecting suitable sand from the sea or land to replenish the eroded beach is the most natural countermeasure to solve coastal erosion. Beach sand replenishment has been proven to be an economical and effective measure, and its impact on downstream beaches is less than other protective facilities. Since the sand artificially filled on the beach will still be washed away under various marine environmental conditions, especially the action of waves, the beach must be replenished every few years.

[0008] Although there are many forms of coastal protection projects, they all have their own shortcomings. From the above analysis, we can see that, first of all, except for the fourth artificial river beach sand replenishment measure, the other measures are set up in the sea water, which does not protect the beaches above the high tide line, and the sand will still be carried into the sea water by wind erosion; secondly, various dams have played a role in reducing waves and silt deposited on the shore, but at the same time a large amount of sea sand is still washed back into the sea. Both sides of the dam play a role in blocking silt, reducing the supply of silt on shore and the siltation effect; in addition, all kinds of dams are rigid structures, and generally only one is set up. The waves passing through the dam still have great energy and will still erode the coast. Moreover, 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 flexible protection system for near-natural siltation and land reclamation to overcome the shortcomings of the prior art.

[0010] To achieve the aforementioned object of the invention, the technical solution adopted by the embodiment of the present invention includes:

[0011] An embodiment of the present invention provides a flexible protection system for near-natural siltation and land formation, comprising a directional opening and closing brush fence arranged in multiple lanes parallel to the coastline, a seabed surface covering net and an integrated one-way sand barrier for sand blocking and sand dredging; the seabed surface covering net is arranged on the seaward side of the directional opening and closing brush fence, the directional opening and closing brush fence and the seabed surface covering net are distributed in the intertidal zone, the integrated one-way sand barrier for sand blocking and sand dredging is distributed above the highest tide line, and the seabed surface covering net is laid close to the seabed surface and is semi-floating in the sea water.

[0012] Furthermore, the directional opening and closing brush fence includes a plurality of upright support rods, a plurality of filamentary interception net brushes and a plurality of net brush support rods; wherein, a filamentary interception net brush is fixed on each support rod, and the filamentary interception net brush includes a plurality of wire bundles distributed along the length direction of the support rod, and the two ends of each wire bundle extend to the two sides of the support rod, and any two adjacent filamentary interception net brushes are arranged in parallel and partially overlapped, and an upright net brush support rod is also provided at the overlap of any two adjacent filamentary interception net brushes and on the seaward side; when waves in the shoreward direction hit the directional opening and closing brush fence, the two ends of each of the wire bundles are bent toward the coast direction, so that any two adjacent filamentary interception net brushes are separated from each other, thereby allowing solids carried by the waves to pass through the directional opening and closing brush fence, and when waves in the seaward direction hit the directional opening and closing brush fence, the two ends of each wire bundle are blocked by the corresponding net brush support rods, so that any two adjacent filamentary interception net brushes remain in an overlapping state, thereby blocking solids carried by the waves from passing through the directional opening and closing brush fence.

[0013] Furthermore, the sand-blocking and sand-dredging integrated one-way sand barrier comprises a plurality of columns arranged at intervals, the lower portion of each column is fixedly connected to the base, and a plurality of hooks are connected to both sides of each column, the plurality of hooks are arranged at intervals along the length direction of the column, and a plurality of hanging plates and at least one blocking cross bar are distributed between two adjacent columns, the hanging plates are arranged in a horizontal direction, and the two ends of the upper edge are respectively connected to a column through at least one hook, and the lower edge of the hanging plate is placed vertically on the shore side, and any two adjacent hanging plates are arranged in parallel. The blocking cross bar is arranged and partially overlapped, and the blocking cross bar is arranged on the seaward side of the lower edge of the bottommost hanging plate; when the wind toward the shore sweeps the sand-blocking and sand-dredging integrated one-way sand barrier, any two adjacent hanging plates are separated from each other, so that the sand carried by the wind is transported toward the land through the sand-blocking and sand-dredging integrated one-way sand barrier; and when the wind toward the sea sweeps the sand-blocking and sand-dredging integrated one-way sand barrier, any two adjacent hanging plates are kept in an overlapping state, so as to prevent the sand carried by the wind from passing through the sand-blocking and sand-dredging integrated one-way sand barrier.

[0014] Furthermore, the seabed surface covering net comprises a horizontally laid nylon net, and the nylon net is fixed to the seabed surface by a plurality of fixing rods.

[0015] Compared with the prior art, the directional opening and closing brush fence provided in the embodiment of the present invention has a simple structure and is easy to use. The flexible protection system formed by cooperating with the integrated one-way sand barrier for sand blocking and sand dredging and the seabed surface covering net can achieve one-way interception of sand both in seawater and on land, and can promote the siltation process of sand on the land side, thereby achieving the purpose of promoting siltation and creating land in a near-natural and flexible manner. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a schematic diagram of the assembly process of a directional opening and closing brush fence in one embodiment of the present invention;

[0018] Figure 2 It is a front view of a directional opening and closing brush-shaped fence in a closed state in one embodiment of the present invention;

[0019] Figure 3 It is a front view of a directional opening and closing brush-shaped fence in an open state in one embodiment of the present invention;

[0020] Figure 4 It is a side view of a directional opening and closing brush-shaped fence in a closed state in one embodiment of the present invention;

[0021] Figure 5 is a side view of a directional opening and closing brush-shaped fence in an open state in one embodiment of the present invention;

[0022] Figure 6 It is a schematic diagram of the assembly process of a sand-blocking and sand-draining integrated one-way sand barrier in one embodiment of the present invention;

[0023] Figure 7 It is a front view of a sand-blocking and sand-draining integrated one-way sand barrier in a closed state in one embodiment of the present invention;

[0024] Figure 8 This is a front view of a sand-blocking and sand-draining integrated one-way sand barrier in an open state in one embodiment of the present invention;

[0025] Fig. 9 It is a structural schematic diagram of a seabed surface covering net in one embodiment of the present invention.

[0026] Fig.10 It is a schematic structural diagram of a flexible protection system for near-natural siltation and land reclamation in one embodiment of the present invention.

[0027] Explanation of the reference numerals: 1-support rod, 2-filamentary intercepting net brush, 3-net brush supporting rod, 4-connecting rod, 5-column, 51-base, 52-hook, 6-hanging plate, 61-hanging plate body, 62-reinforcement cross bar, 7-blocking cross bar, 8-HDPE nylon ribbon, 9-braided reinforcement ribs, 10-seabed surface, 11-highest tide level line, 12-angle of inclination toward the shore, 13-directional opening and closing brush fence, 14-seabed covering net, 15-one-way sand barrier for sand blocking and sand dredging, 16-coastal erosion protection area. DETAILED DESCRIPTION

[0028] The present invention will be more fully understood through the following detailed description, which should be read in conjunction with the accompanying drawings. Detailed embodiments of the present invention are disclosed herein; however, it should be understood that the disclosed embodiments are only exemplary of the present invention, which can be embodied in various forms. Therefore, the specific functional details disclosed herein should not be interpreted as limiting, but only as the basis of the claims and as a representative basis for teaching those skilled in the art to adopt the present invention in different ways in virtually any appropriate detailed embodiment.

[0029] One aspect of an embodiment of the present invention provides a flexible protection system for near-natural siltation and land formation, comprising a directional opening and closing brush fence arranged in multiple lanes parallel to the coastline, a seabed surface covering net and an integrated one-way sand barrier for sand blocking and sand dredging; the seabed surface covering net is arranged on the seaward side of the directional opening and closing brush fence, the directional opening and closing brush fence and the seabed surface covering net are distributed in the intertidal zone, the integrated one-way sand barrier for sand blocking and sand dredging is distributed above the highest tide line, and the seabed surface covering net is laid close to the seabed surface and is semi-floating in the sea water.

[0030] In some preferred embodiments, the directional opening and closing brush fence includes a plurality of upright support poles, a plurality of filamentary interception net brushes and a plurality of net brush support poles; wherein, a filamentary interception net brush is fixed on each support pole, and the filamentary interception net brush includes a plurality of wire bundles distributed along the length direction of the support pole, and the two ends of each wire bundle extend to the two sides of the support pole, and any two adjacent filamentary interception net brushes are arranged in parallel and partially overlapped, and an upright net brush support pole is also provided at the overlap of any two adjacent filamentary interception net brushes and on the seaward side. When the waves in the shoreward direction hit the directional opening and closing brush fence, the two ends of each wire bundle are bent toward the coast, so that any two adjacent wire-like intercepting net brushes are separated from each other, thereby allowing the solids carried by the waves to pass through the directional opening and closing brush fence, and when the waves in the seaward direction hit the directional opening and closing brush fence, the two ends of each wire bundle are blocked by the corresponding net brush rods, so that any two adjacent wire-like intercepting net brushes remain in an overlapping state, thereby preventing the solids carried by the waves from passing through the directional opening and closing brush fence.

[0031] In some preferred embodiments, the directional retractable brush fence is distributed in a strip area located in the intertidal zone and 20m-100m away from the highest tide line.

[0032] In some preferred embodiments, the directional opening and closing brush fence is tilted toward the coast as a whole and the tilt angle is 70-80°.

[0033] In some preferred embodiments, 2 to 4 directional opening and closing brush fences are arranged in the intertidal zone.

[0034] In some preferred embodiments, the lower portion of the support rod is buried in the mudflat, and the top portion is bent toward the coast and forms an inclination angle of 70-80° with the seabed surface.

[0035] In some preferred embodiments, the support rod has a length of 1.5m-3.0m, a diameter of 30mm-40mm, and a height exposed from the tidal flat of 0.8m-2.3m.

[0036] In some preferred embodiments, the height of each support pole exposed from the mudflat gradually decreases along the direction from the sea to the coast.

[0037] In some preferred embodiments, the support rods include galvanized steel pipes.

[0038] In some preferred embodiments, the filament bundle is composed of a plurality of HDPE filaments, wherein the diameter of the HDPE filaments is 1-2 mm and the length is 20-30 cm.

[0039] In some preferred embodiments, the wire bundle has a diameter of 10-20 mm and a length of 20-30 cm.

[0040] In some preferred embodiments, the distance between adjacent wire bundles on the same support rod is 10-20 mm.

[0041] In some preferred embodiments, the length of each wire bundle extending from both ends to both sides of the support rod is 10-15 cm.

[0042] In some preferred embodiments, the length of the overlapping portion of any two adjacent filamentary intercepting mesh brushes is 4-6 cm.

[0043] In some preferred embodiments, the wire bundle includes a plurality of thin wires radially passing through the support rod, and the plurality of thin wires are fixed on the support rod by cement slurry poured into the inner cavity of the support rod.

[0044] In some preferred embodiments, the lower part of the net brush rod is buried in the mudflat, and the top is bent toward the coast and forms an inclination angle of 70-80° with the seabed surface.

[0045] In some preferred embodiments, the length of the net brush supporting rod is 1.5m-3.0m, the diameter is 20mm-30mm, and the height exposed to the tidal flat is 0.8m-2.3m.

[0046] In some preferred embodiments, the height of each net brush exposed from the mudflat gradually decreases along the direction from the sea to the coast.

[0047] In some preferred embodiments, the mesh brush support rod comprises a galvanized steel pipe.

[0048] In some preferred embodiments, the plurality of support rods and the plurality of net brush supporting rods are further interconnected via a plurality of connecting rods to form a whole.

[0049] The directional opening and closing brush-like fence provided in the embodiment of the present invention has a unique one-way opening and closing design, so that the waves heading towards the shore will cause the opening and closing mouth to open, and sand and other sediments will enter the shore side of the fence through the opening and closing mouth along with the water flow and waves. When the waves retreat to the ocean, the opening and closing mouth will automatically close. At this time, the one-way filamentary interception mesh brush of the fence allows seawater to pass through, but will block the sand on the shore side of the fence and will not be carried into the ocean. Therefore, this process is a flexible process that can be opened and closed at any time with the surge of the waves, thereby promoting the accumulation of sand on the seabed.

[0050] The directional opening and closing brush fence provided in the embodiment of the present invention can make the silt come continuously from the seabed surface around the coast and islands, so there is no need for artificial sand replenishment, saving the cost of transportation and filling materials; wherein, the one-way filamentary interception mesh brush is made of filamentary high-strength polyethylene (HDPE) material, which is resistant to seawater corrosion and has the advantage of flexible wave breaking; the wire bundle of the mesh brush passes through the supporting steel pipe, and then cement slurry is poured into the steel pipe, so that multiple wire bundles are glued and fixed to the support rod to form a whole, and the reinforced concrete structure formed has the advantage of high strength.

[0051] In some preferred embodiments, the sand-blocking and sand-draining integrated one-way sand barrier includes a plurality of columns arranged at intervals, the lower portion of each column is fixedly connected to the base, and a plurality of hooks are connected to both sides of each column, the plurality of hooks are arranged at intervals along the length direction of the column, and a plurality of hanging plates and at least one blocking cross bar are distributed between two adjacent columns, the hanging plates are arranged in a horizontal direction, and the two ends of the upper edge are respectively connected to a column through at least one hook, and at the same time, the lower edge of the hanging plate is placed vertically on the shore side, and any two adjacent hanging plates are not connected. The blocking cross bar is arranged in a row and partially overlaps, and the blocking cross bar is arranged on the seaward side of the lower edge of the lowest hanging plate; when the wind toward the shore blows the sand-blocking and sand-dredging integrated one-way sand barrier, any two adjacent hanging plates are separated from each other, so that the sand carried by the wind is transported toward the land through the sand-blocking and sand-dredging integrated one-way sand barrier; and when the wind toward the sea blows the sand-blocking and sand-dredging integrated one-way sand barrier, any two adjacent hanging plates are kept in an overlapping state, so as to prevent the sand carried by the wind from passing through the sand-blocking and sand-dredging integrated one-way sand barrier.

[0052] In some preferred embodiments, the sand-blocking and sand-draining integrated one-way sand barriers are multiple, and the distance between two adjacent sand-blocking and sand-draining integrated one-way sand barriers is 10m-50m.

[0053] In some preferred embodiments, the height of the column is 1.3m-3m, and the cross-section is 15cm×15cm.

[0054] In some preferred embodiments, the base has a height of 0.7m-1m and a cross-section of 30cm×30cm.

[0055] In some preferred embodiments, the distance between two upper and lower adjacent hooks is 15 cm-20 cm.

[0056] In some preferred embodiments, the hook comprises a steel bar ring hook.

[0057] In some preferred embodiments, the columns include concrete columns.

[0058] In some preferred embodiments, the hanging plate includes a hanging plate body and a reinforcing cross bar arranged on the top of the hanging plate body, and ends of the reinforcing cross bar extend out of both ends of the hanging plate body for hanging on the hook.

[0059] In some preferred embodiments, the reinforcing cross bar and the hanging plate body are wrapped and bonded together by a hot-melt method.

[0060] In some preferred embodiments, the width of the hanging plate body is 15cm-20cm, and the thickness is 2mm-3mm.

[0061] In some preferred embodiments, the diameter of the reinforcing cross bar is 1-2 cm, and the distance between the end of the reinforcing cross bar and the corresponding end of the hanging plate body is 1.5 cm.

[0062] In some preferred embodiments, the width of the overlapping portion of any two adjacent hanging boards is 2 cm-4 cm.

[0063] In some preferred embodiments, the cladding body comprises a polyethylene sheet.

[0064] In some preferred embodiments, the reinforcing crossbar comprises steel bars.

[0065] In some preferred embodiments, the diameter of the blocking crossbar is 1-2 cm.

[0066] In some preferred embodiments, the blocking crossbar comprises steel bars.

[0067] In some preferred embodiments, for the island coastline, the integrated one-way sand barrier for sand blocking and sand dredging is an enclosing multi-channel arrangement.

[0068] The sand-blocking and sand-dredging integrated one-way sand barrier provided by the embodiment of the present invention has a simple structure and is easy to construct and maintain. Its one-way valve design can only transport sand to the shore but not to 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 on the accumulated side will be eroded by the wind. Therefore, the risk of the sand barrier itself being buried is low, and it has the characteristics of sand accumulation, erosion reciprocating cycle, self-cleaning and long service life; under the action of multiple wind directions on the coast, the sand particles reciprocate and circulate, and sand may accumulate on both sides of the bottom hanging plate of the sand barrier. When the sand surface is raised to 2 / 3 of the height of the sand barrier, the buried hanging plate at the bottom 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 hanging plates and columns, conveniently raising the height of the sand barrier, and extending the service life of the project, while saving costs, achieving the purpose of continuous surface lifting and promoting siltation and land reclamation.

[0069] In some preferred embodiments, the seabed surface covering net comprises a horizontally laid nylon net, and the nylon net is fixed to the seabed surface by a plurality of fixing rods.

[0070] In some preferred embodiments, the distance between adjacent fixed brazing rods is 50-100 cm.

[0071] In some preferred embodiments, the nylon mesh includes a plurality of braided reinforcing ribs arranged vertically in parallel, and a plurality of HDPE nylon ribbons are distributed between two adjacent braided reinforcing ribs, wherein the width of the HDPE nylon ribbon is 2-3 cm and the thickness is 1-1.5 mm.

[0072] In some preferred embodiments, the nylon net has a length of 10-50 m and a width of 5-10 m.

[0073] In some preferred embodiments, the braided reinforcement rib has a width of 3 mm and a thickness of 2 mm.

[0074] In some preferred embodiments, the distance between the seabed covering net and the seabed surface is 10-20 cm.

[0075] The flexible protection system provided by the embodiment of the present invention, a flexible protection system formed by the cooperation of a directional opening and closing brush fence, an integrated one-way sand barrier for sand blocking and sand dredging, and a seabed covering net, realizes one-way interception of sand in seawater and on land, promotes the siltation process of sand on the land side, thereby achieving the purpose of promoting siltation and land creation in a near-natural and flexible manner; wherein, the seabed covering net enables the directional opening and closing brush fence to intercept sand and gravel on the shore side, and under the transmission and scouring of waves, the sand and gravel naturally fall into the seabed under the covering net, thereby playing a role in flexibly reducing wave energy on the bed surface, covering and protecting sand and gravel on the bed surface, and accumulating bed surface elevation.

[0076] The flexible protection system provided by the embodiment of the present invention also has the beneficial effects of automatically filtering seawater, intercepting marine garbage and cleaning marine pollution.

[0077] The technical solution provided by the above embodiments of the present invention utilizes the principle of a one-way valve, which can make the supply of sandy and gravel sediments on seawater and land to the shore greater than the loss to the sea. It has a near-natural and flexible function of promoting siltation and land formation, and is of great practical significance for preventing coastal erosion.

[0078] The following will describe the technical solutions in the embodiments of the present invention in detail in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0079] Example

[0080] This embodiment first provides a flexible protection system for near-natural siltation and land reclamation, such as Fig.10 As shown, it includes directional opening and closing brush fences 13, seabed surface covering nets 14 and sand blocking and sand dredging integrated one-way sand barriers 15 arranged in parallel to the coastline; the seabed surface covering nets 14 are arranged on the seaward side of the directional opening and closing brush fences 13, the directional opening and closing brush fences 13 and the seabed surface covering nets 14 are distributed in the intertidal zone, the sand blocking and sand dredging integrated one-way sand barriers 15 are distributed above the highest tide line 11, and the seabed surface covering nets 14 are laid close to the seabed surface 10 and are in a semi-floating state in the seawater. The structure and layout method thereof will be described in detail below.

[0081] See also Figure 1-Figure 5In this embodiment, the directional opening and closing brush fence includes a plurality of upper curved metal support rods 1, a filamentary intercepting net brush 2 fixed on the support rods, a net brush supporting rod 3, and a connecting rod 4 for connecting the support rods and the net brush supporting rod. The directional opening and closing brush fence can be arranged in a strip area 20m-100m away from the highest tide line in the intertidal zone. Moreover, in the strip area, 2-4 directional opening and closing brush fences can be arranged in an inclined manner, in a straight line, and parallel to the coastline. The inclination angle of each fence to the coast is 70-80° to reduce the impact of waves in the shoreward direction. See Figure 1 As shown, the filamentary intercepting mesh brush 2 can be first fixedly connected to the metal support rod 1, and then connected to the mesh brush supporting rod 3, the connecting rod 4, etc., so as to form the directional opening and closing brush-like fence.

[0082] Each support rod 1 can be made of galvanized steel pipe, with a height of 1.5m-3.0m, a diameter of 30mm-40mm, a depth of more than 0.7m buried in the beach, and a height of 0.8m-2.3m exposed from the beach. Figure 2 The height of each support rod 1 exposed from the beach gradually decreases. The top of each support rod 1 is bent to a certain extent, and the bending direction is toward the coast when it is set, and has an inclination angle of 70-80° with the seabed surface.

[0083] Among them, each filamentary interception mesh brush 2 may include multiple wire bundles, and each wire bundle may be composed of multiple HDPE filaments. Each wire bundle can be passed through the support rod 1, and then cement slurry or other adhesives are poured into the support rod 1 to fix the wire bundle on the support rod. The diameter of each HDPE filament is 1-2mm and the length is 20-30cm. The diameter of each wire bundle is 10-20mm and the length is 20-30cm. The spacing between adjacent wire bundles on the same support rod 1 is 10-20mm. In addition, the length of each wire bundle extending on the left and right sides of the support rod is equal, and the length of each side is 10-15cm. Multiple filamentary interception mesh brushes 2 are arranged side by side, wherein an opening and closing mouth is formed between two adjacent filamentary interception mesh brushes 2, and the length of the overlapping area between two adjacent filamentary interception mesh brushes 2 is 4-6cm.

[0084] Among them, each mesh brush support rod 3 is arranged on the seaward side of the filamentary interception mesh brush 2, in the middle position of two adjacent support rods 1 (that is, the central position of the overlapping area between two adjacent filamentary interception mesh brushes 2). When the waves heading toward the shore hit the filamentary interception mesh brush 2, the two ends of the filamentary interception mesh brush 2 bend toward the coast, and the two adjacent filamentary interception mesh brushes 2 separate from each other, so that the aforementioned opening and closing opening opens naturally, allowing the solids carried by the waves to pass through the filamentary interception mesh brush 2. When the waves heading toward the sea hit the filamentary interception mesh brush 2, the two adjacent filamentary interception mesh brushes 2 remain in an overlapping state due to the obstruction of the mesh brush support rod 3, so that the aforementioned opening and closing opening closes automatically, blocking the solids carried by the waves from rushing into the sea, thereby realizing the one-way passage function of opening toward the shore and closing toward the sea.

[0085] Each net brush supporting rod 3 can be made of a galvanized steel pipe, with a height of 1.5m-3.0m, a diameter of 20mm-30mm, a depth of 0.7m or more buried in the beach, and a height of 0.8m-2.3m exposed from the beach. From the sea to the shore, the height of each net brush supporting rod 3 exposed from the beach gradually decreases. The top of each net brush supporting rod 3 has a certain curvature, and when set, the curvature direction is toward the coast, and has an inclination angle of 70-80° with the seabed surface 10.

[0086] Each connecting rod 4 serves to connect each supporting rod 1 and the net brush supporting rod 3 to form a whole. Each connecting rod 4, the supporting rod 1 and the net brush supporting rod 3 can be connected together by a connecting mechanism such as a cross pipe clamp, but is not limited to this.

[0087] See also Figure 6-Figure 8 In this embodiment, the integrated one-way sand barrier for blocking and dredging sand includes a plurality of columns 5 arranged at intervals, the lower part of each column 5 is fixedly connected to the base 51, and a plurality of hooks 52 are connected to both sides of each column 5, and the plurality of hooks 52 are arranged at intervals along the length direction of the column 5, and a plurality of hanging plates 6 and at least one blocking cross bar 7 are distributed between two adjacent columns 5, the hanging plates 6 are arranged in the horizontal direction, and the two ends of the upper edge are respectively connected to a column 5 through at least one hook 52, and the lower edge of the hanging plates 6 is vertically placed on the shore side, and any two adjacent hanging plates 6 are arranged in parallel and partially overlap, and the blocking cross bar 7 is arranged at the most The seaward side of the lower edge of the bottom hanging plate 6; when the wind toward the shore blows the sand-blocking and sand-dredging integrated one-way sand barrier, any two adjacent hanging plates 6 are separated from each other, so that the sand carried by the wind is transported toward the land through the sand-blocking and sand-dredging integrated one-way sand barrier; and when the wind toward the sea blows the sand-blocking and sand-dredging integrated one-way sand barrier, any two adjacent hanging plates 6 are kept in an overlapping state, so as to prevent the sand carried by the wind from passing through the sand-blocking and sand-dredging integrated one-way sand barrier; the sand-blocking and sand-dredging integrated one-way sand barrier is multi-channel, and the distance between two adjacent sand-blocking and sand-dredging integrated one-way sand barriers is 10m-50m.

[0088] Among them, the height of the column 5 is 1.3m-3m, and the cross-section is 15cm×15cm; the height of the base 51 is 0.7m-1m, and the cross-section is 30cm×30cm; the distance between two adjacent hooks 52 is 15cm-20cm; the hanging plate 6 includes a polyethylene hanging plate body 61 and a reinforcing cross bar 62 arranged on the top of the hanging plate body 61, and the ends of the reinforcing cross bar 62 extend out of the two ends of the hanging plate body 61 for hanging on the hook 52; the reinforcing cross bar 62 and the hanging plate body 61 are wrapped and bonded together by a hot melt method; the width of the hanging plate body 61 is 15cm-20cm, and the thickness is 2mm-3mm; the diameter of the reinforcing cross bar 62 is 1-2cm, and the distance between the end of the reinforcing cross bar 62 and the corresponding end of the hanging plate body 61 is 1.5cm; the width of the overlapping part of any two adjacent hanging plates 6 is 2cm-4cm; the diameter of the blocking cross bar 7 is 1-2cm, and the blocking cross bar 7 includes steel bars.

[0089] For island coastlines, one-way sand barriers that block and dredge sand are set up in an enclosing multi-lane manner.

[0090] In this embodiment, refer to Fig. 9 The seabed surface covering net can be made of nylon net, which includes multiple parallel and upright braided reinforcement ribs 9, and multiple HDPE nylon ribbons 8 are distributed between two adjacent braided reinforcement ribs 9, the width of the HDPE nylon ribbon 8 is 2-3cm, and the thickness is 1-1.5mm; the length of the nylon net is 10-50m, and the width is 5-10m; the width of the braided reinforcement ribs 9 is 3mm, and the thickness is 2mm; the distance between the seabed surface covering net and the seabed surface is 10-20cm.

[0091] The method for deploying the flexible protection system according to the embodiment of the present invention includes:

[0092] Multiple directional retractable brush fences 13 are deployed in the intertidal zone and parallel to the shoreline;

[0093] An integrated one-way sand barrier 15 for sand blocking and sand drainage is arranged above the highest tide line 11 and parallel to the coastline (first use a drilling machine to drill holes in the ground with a hole diameter of 30 cm and a depth of 0.7-1 m, bury the columns 5, and the spacing between the columns 5 is 2.04 m, and then hang the two ends of the hanging plates 6 on the hooks 52 of the columns 5; when setting, the lower edge of the hanging plates 6 is placed vertically on the shore side, and any two adjacent hanging plates 6 are arranged in parallel and partially overlapped, and the blocking cross bar 7 is arranged on the lowest hook 52 of the column 5 to block the bottom hanging plate 6).

[0094] At low tide, a plurality of strip-shaped seabed surface covering nets 14 are laid in the intertidal zone on the seaward side of the directional opening and closing brush fence 13 by means of fixed brazing to form a flexible protection system.

[0095] The present embodiment forms a flexible protection system by combining a directional opening and closing brush fence with an integrated one-way sand barrier for sand blocking and sand dredging and a seabed net, wherein the directional opening and closing brush fence and the integrated one-way sand barrier for sand blocking and sand dredging are both flexible structures, both adopt the principle of one-way valves, and are arranged in parallel with the coast in multiple lanes; the directional opening and closing brush fence is arranged in the sea water of the intertidal zone, and under the action of waves, sand is transported to the shore in one direction; the hanging plate-type one-way sand barrier for sand blocking and sand dredging is arranged on the land beach, and under the action of wind, sand is transported to the shore in one direction; the protection system formed by the combination of the two can It can transport sea sand, shells, coral debris in sea water and on land to the shore, while preventing them from returning to the sea, so that the supply of sediment to the shore is greater than the loss to the sea, reducing coastal erosion; the flexible seabed covering net ensures that larger granular debris (sand, gravel, coral, shells, etc.) on the seabed can fall to the seabed at the bottom of the net and be protected by the net from being carried back to the sea by the tide. The three are combined with a certain layout method to achieve one-way interception of sand in sea water and on land, promote the siltation process of sand on the land side, and thus achieve the purpose of promoting siltation and land creation in a near-natural and flexible manner.

[0096] The various aspects, embodiments, features and examples of the present invention should be considered as illustrative in all aspects and are not intended to limit the present invention, the scope of the present invention is defined only by the claims. Other embodiments, modifications and uses will be apparent to those skilled in the art without departing from the spirit and scope of the claimed invention.

[0097] The use of headings and sections in this disclosure is not meant to limit the disclosure; each section may apply to any aspect, embodiment, or feature of the disclosure.

[0098] Throughout this disclosure, where a composition is described as having, containing, or comprising particular components, or where a process is described as having, containing, or comprising particular process steps, it is contemplated that the compositions taught by the present invention also consist essentially of or consist of the recited components, and that the processes taught by the present invention also consist essentially of or consist of the recited process steps.

[0099] Unless specifically stated otherwise, use of the terms "include," "includes," "including," "have," "has," or "having" should generally be construed as open ended and non-limiting.

[0100] It should be understood that the order of the various steps or the order in which a particular action is performed is not very important, as long as the teachings of the present invention remain operable. In addition, two or more steps or actions may be performed simultaneously.

[0101] In addition, the inventors of this case also referred to the aforementioned embodiments and conducted experiments with other raw materials, process operations, and process conditions described in this specification, and obtained relatively ideal results.

[0102] Although the present invention has been described with reference to illustrative embodiments, it will be appreciated by those skilled in the art that various other changes, omissions and / or additions may be made without departing from the spirit and scope of the present invention and that the elements of the embodiments may be replaced by substantial equivalents. In addition, many modifications may be made without departing from the scope of the present invention to adapt specific circumstances or materials to the teachings of the present invention. Therefore, it is not intended herein to limit the present invention to the disclosed specific embodiments for performing the present invention, but it is intended that the present invention will include all embodiments 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 rather uses the terms first, second, etc. to distinguish one element from another.

Claims

1. A flexible protection system for near-natural siltation and land reclamation, characterized in that: It includes directional opening and closing brush fences, seabed surface covering nets and integrated sand blocking and sand dredging one-way sand barriers arranged in parallel to the coastline; the seabed surface covering net is arranged on the seaward side of the directional opening and closing brush fence, the directional opening and closing brush fence and the seabed surface covering net are distributed in the intertidal zone, the integrated sand blocking and sand dredging one-way sand barriers are distributed above the highest tide line, and the seabed surface covering net is laid close to the seabed surface and is in a semi-floating state in the seawater; The directional opening and closing brush fence comprises a plurality of upright support rods (1), a plurality of filamentary interception net brushes (2) and a plurality of net brush support rods (3); wherein each support rod (1) is fixed with a filamentary interception net brush (2), the filamentary interception net brush (2) comprising a plurality of wire bundles distributed along the length direction of the support rod (1), the two ends of each wire bundle extending to the two sides of the support rod (1), any two adjacent filamentary interception net brushes (2) being arranged in parallel and partially overlapping, and an upright filamentary interception net brush (2) being arranged at the adjacent position of the any two adjacent filamentary interception net brushes (2) and on the side facing the sea. A net brush support rod (3); when a wave in a shoreward direction strikes the directional opening and closing brush fence, the two ends of each wire bundle bend toward the coast, so that any two adjacent wire-shaped intercepting net brushes (2) are separated from each other, thereby allowing solids carried by the waves to pass through the directional opening and closing brush fence; and when a wave in a seaward direction strikes the directional opening and closing brush fence, the two ends of each wire bundle are blocked by the corresponding net brush support rod (3), so that any two adjacent wire-shaped intercepting net brushes (2) remain in an overlapping state, thereby preventing solids carried by the waves from passing through the directional opening and closing brush fence; The sand-blocking and sand-draining integrated one-way sand barrier comprises a plurality of columns (5) arranged at intervals, the lower part of each column (5) being fixedly connected to a base (51), and a plurality of hooks (52) being connected to both sides of each column (5), the plurality of hooks (52) being arranged at intervals along the length direction of the column (5), and a plurality of hanging plates (6) and at least one blocking cross bar (7) being distributed between two adjacent columns (5), the hanging plates (6) being arranged in a horizontal direction and the two ends of the upper edge being connected to a column (5) via at least one hook (52), and the lower edge of the hanging plates (6) being vertically placed on the shore side. , any two adjacent hanging plates (6) are arranged in parallel and partially overlap, and the blocking cross bar (7) is arranged on the seaward side of the lower edge of the bottom hanging plate (6); when the wind toward the shore blows the sand-blocking and sand-draining integrated one-way sand barrier, any two adjacent hanging plates (6) are separated from each other, so that the sand carried by the wind is transported toward the land through the sand-blocking and sand-draining integrated one-way sand barrier; and when the wind toward the sea blows the sand-blocking and sand-draining integrated one-way sand barrier, any two adjacent hanging plates (6) are kept in an overlapping state, so that the sand carried by the wind is blocked from passing through the sand-blocking and sand-draining integrated one-way sand barrier; The seabed surface covering net comprises a horizontally laid nylon net, the nylon net is fixed on the seabed surface by a plurality of fixing rods, and the distance between the seabed surface covering net and the seabed surface is 10-20 cm.

2. The flexible protection system for near-natural siltation and land reclamation according to claim 1 is characterized by: The directional opening and closing brush fence is distributed in a strip area located in the intertidal zone and 20m-100m away from the highest tide line; and / or, the directional opening and closing brush fence is tilted toward the coast as a whole and the inclination angle is 70-80°; and / or, 2-4 directional opening and closing brush fences are arranged in the intertidal zone.

3. The flexible protection system for near-natural siltation and land reclamation according to claim 1 is characterized by: The lower part of the support rod (1) is buried in the mudflat, and the top part is bent toward the coast and forms an inclination angle of 70-80° with the seabed surface; and / or, the length of the support rod (1) is 1.5m-3.0m, the diameter is 30mm-40mm, and the height exposed from the mudflat is 0.8m-2.3m; and / or, along the direction from the sea to the coast, the height of each support rod (1) exposed from the mudflat gradually decreases; and / or, the support rod (1) comprises a galvanized steel pipe; and / or, the wire bundle is composed of a plurality of HDPE filaments, the diameter of the HDPE filaments being 1-2 mm and the length being 20-30 cm; and / or, the diameter of the wire bundle is 10-20 mm and the length being 20-30 cm; and / or, the distance between adjacent wire bundles on the same support rod is 10-20 mm; and / or, the length of each wire bundle extending from both ends to both sides of the support rod (1) is 10-15 cm; and / or, the length of the overlapping portion of any two adjacent filamentary intercepting mesh brushes (2) is 4-6 cm; and / or, the wire bundle comprises a plurality of filaments passing through the support rod (1) in a radial direction, and the plurality of filaments are fixed to the support rod (1) by cement slurry poured into the inner cavity of the support rod (1); And / or, the lower part of the net brush supporting rod (3) is buried in the mudflat, and the top is bent toward the coast and forms an inclination angle of 70-80° with the seabed surface; and / or, the length of the net brush supporting rod (3) is 1.5m-3.0m, the diameter is 20mm-30mm, and the height exposed from the mudflat is 0.8m-2.3m; and / or, along the direction from the sea to the coast, the height of each net brush supporting rod (3) exposed from the mudflat gradually decreases; and / or, the net brush supporting rod (3) includes a galvanized steel pipe.

4. The flexible protection system for near-natural siltation and land reclamation according to claim 1 is characterized by: The plurality of support rods (1) and the plurality of net brush supporting rods (3) are further connected to each other via a plurality of connecting rods (4) to form a whole.

5. The flexible protection system for near-natural siltation and land reclamation according to claim 1 is characterized by: The one-way sand barrier that blocks and dredges sand is multiple, and the distance between two adjacent one-way sand barriers that blocks and dredges sand is 10m-50m.

6. The flexible protection system for near-natural siltation and land reclamation according to claim 5 is characterized by: The height of the column (5) is 1.3m-3m, and the cross-section is 15cm×15cm; and / or, the height of the base (51) is 0.7m-1m, and the cross-section is 30cm×30cm; and / or, the distance between two upper and lower adjacent hooks (52) is 15cm-20cm; and / or, the hook (52) comprises a steel bar ring hook, and / or, the column (5) comprises a concrete column; and / or, the hanging plate (6) comprises a hanging plate body (61) and a reinforcing cross bar (62) arranged on the top of the hanging plate body (61), and the ends of the reinforcing cross bar (62) extend out of the two ends of the hanging plate body (61) for being hung on the hook (52); and / or, the reinforcing cross bar (62) and the hanging plate body (61) are wrapped and bonded together by a hot melt method; and / or, the width of the hanging plate body (61) is 15 cm-20 cm, and the thickness is 2 mm-3 mm; and / or, the diameter of the reinforcing cross bar (62) is 1-2 cm, and the distance between the end of the reinforcing cross bar (62) and the corresponding end of the hanging plate body (61) is 1.5 cm; and / or, the width of the overlapping part of any two adjacent hanging plates (6) is 2 cm-4 cm; and / or, the hanging plate body (61) comprises a polyethylene sheet, and / or, the reinforcing cross bar (62) comprises a steel bar; And / or, the diameter of the blocking cross bar (7) is 1-2 cm, and / or, the blocking cross bar (7) comprises steel bars.

7. The flexible protection system for near-natural siltation and land reclamation according to claim 1 is characterized by: For the island coastline, the integrated one-way sand barrier for sand blocking and sand dredging is an enclosing multi-channel setting.

8. The flexible protection system for near-natural siltation and land reclamation according to claim 1 is characterized by: The spacing between adjacent fixed pins is 50-100 cm; and / or the nylon net comprises a plurality of braided reinforcing ribs (9) arranged in parallel and upright, and a plurality of HDPE nylon ribbons (8) are distributed between two adjacent braided reinforcing ribs (9), wherein the width of the HDPE nylon ribbon (8) is 2-3 cm and the thickness is 1-1.5 mm; and / or the length of the nylon net is 10-50 m and the width is 5-10 m; and / or the width of the braided reinforcing ribs (9) is 3 mm and the thickness is 2 mm.

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