39 results about "Coastal erosion" patented technology

The present invention relates to a porous underwater breakwater for preventing shore erosion and forming a fishing ground, and to a method for producing environmentally-friendly blocks for the underwater breakwater, wherein the underwater breakwater is formed by the environmentally-friendly blocks made of a mixture of effective micro-organisms (EM) and red clay such that valleys and ridges are formed on a seabed of a sea area, to thereby purify water and to prevent red tide outbreaks, and thus achieving early marine afforestation, and wherein the wave energy of swelling waves is absorbed, dispersed, and diffracted at a base layer, an intermediate layer, and a top layer of the breakwater to decrease the wave energy and to thereby significantly decrease a gap between wave heights and restore an eroded area by means of beach nourishment. According to the porous underwater breakwater for preventing shore erosion and forming a fishing ground and the method for producing environmentally-friendly blocks for the underwater breakwater, an energy-absorbing unit formed by stacking multiple blocks on the seabed of the sea area absorbs, disperses, and diffracts the wave energy to effectively decrease the wave energy, and fish can migrate through the pores, the sizes of which correspond to the length of pore-maintaining protrusions formed at each block and communicating spaces, thereby providing a fish habitat and spawning ground. Further, the effective micro-organisms and red clay mixed with concrete mortar neutralize the toxicity of the concrete, purify water, and prevent red tide outbreaks.

In accordance with the present invention, a portable wave-swash & coastal-wind energy harvester, placed on a sea coast in swash zone captures energy contained in coastal waves and in coastal-wind through the utilization of wave turbines, wind turbines, and wave floats. Wave-float levers carrying wave floats and wave turbines, swing and maintain lower halves of wave turbines below water always. A gear system with one-way clutches transmits torque to an alternator to generate electricity. Flywheels maintain steady rotation of alternator shaft. A buoyancy chamber at the bottom produces reduction of weight of the unit when buoyancy chamber is emptied of water, and thereby enhances maneuverability of unit in water. Stabilization tanks at the top when filled with water provide extra weight and stability of the unit in its operating location. Units linked together in an energy farm combine their energy while forming a seawall-like barrier offering protection against coastal erosion.

The present invention relates to submergible modular breakwaters for lowering the kinetic energy of water waves. In particular, the present invention is directed toward a physical embodiment that, when in its floating position, will provide resistance to the movement of water waves in the direction of the waves for a large range of wave periods. The invention is a submergible modular breakwater that can be kept underwater on the sea or lake floor as not to provide any barrier to navigation until it is needed to lower the kinetic energy of waves, when it is quickly raised afloat to provide protection, especially for coastal erosion control during storms or rough waters. Once the lowering of the kinetic energy of water waves is not longer needed, the modular breakwater can be quickly sunk to the sea or lake floor in order to remove any barrier to navigation.

The invention provides a movable type permeable spur structure capable of preventing coast erosion. The movable type permeable spur structure capable of preventing coast erosion comprises a coast, open occasions and anchorage devices. A plurality rows of open occasions are installed on one side of the coast at intervals and in a staggered mode, and the adjacent open occasions are connected through anchorage devices; the center of each open occasion is in a hollow shape, an opening is formed in the upper end of each open occasion, connecting rings are symmetrically installed on the two sides of each open occasion, a water inlet hole is formed in each open occasion, a trapezoidal bottom mat is installed at the bottom of each open occasion, and trapezoidal bottom mats are arranged on the foundation of the coast; the anchorage devices are installed on the two sides of the open occasions and connected with the open occasions through a plurality of anchor chains so as to be fixed to the foundation of the coast. According to the movable type permeable spur structure capable of preventing coast erosion and a construction method, the effect of coast erosion prevention can be achieved, and the movable type permeable spur structure can be conveniently dismounted after the protection requirement is met; the permeable structure of a spur can reduce damage of waves and tides to the spur, so that the project amount is relatively reduced, and construction efficiency is improved; and in addition, construction materials of the dismounted spur can be recycled, and waste of construction materials is avoided.

A reinforced concrete triangular pyramid block for preventing the coast or the shore from being eroded by wave energy. The block has a regular triangular pyramid shape, is made of reinforced concrete, and includes supporting globes 10 and 10' placed at vertices of the triangular pyramid block; supporting rods 20 and 20' connecting the supporting globes 10 and 10' to each other, thereby forming the triangular pyramid shape; a central globe 30 located in the center of the block; and reinforcing rods 40 and 40' connecting middle portions of the supporting rods 20 and 20' to the central globe 30.

The invention discloses a grid cage against coastal erosion and a construction method of the grid cage. The grid cage comprises geogrids, the bottom ends of the geogrids are fixed in seabed soil, geotextiles are arranged in the geogrids, and the geogrids are connected through geotechnical ties. The construction method comprises the following steps that (a) geological exploration is carried out, and a grid cage arrangement route is determined; (b) the geotextile are bound on the inner sides of the geogrids to form a single geogrid cage; (c) a valve cage shoe is fixed on the inner edge of a gridcage sleeve mould and pressed into the seabed soil; (d) the grid cage is vertically lifted, positioned and pressed into the grid cage sleeve mould, and is pulled out after being arranged; (e) adjacent grid cages on the lowest water level line are bound; and (f) the steps (c)-(e) are repeated till the coast line to be protected is fully covered. The grid cage is low in engineering cost, good in corrosion resistance and aging resistance and fast and convenient to construct, and the flexible grid cage can be suitable for arbitrary buckling coast lines and has strong engineering adaptability.

The invention discloses a novel flexible coast protection structure and a construction method of the novel flexible coast protection structure. The structure comprises a mattress tying beam and a wave dissipating platform, wherein the mattress tying beam and the wave dissipating platform are close to the designed water level; the wave dissipating platform is connected with the bottom and the top of a bank slope through a slope and a wave wall respectively; a pebble cushion layer and composite geotextiles are sequentially laid on the lower surface of the slope and the lower surface of the wave dissipating platform. Composite geotextiles and a gravel cushion layer are sequentially laid on the upper surface of the slope and the upper surface of the bottom of the bank slope. A concrete hinged mattress is laid on the gravel cushion layer. The top end of the hinged mattress is connected to the mattress tying beam. The method comprises the steps of prefabrication of concrete ballast block bodies, construction of the mattress tying beam and a bank protection structure above the mattress tying beam, splicing of the concrete hinged mattress, mattress sinking construction and the like. Compared with the existing coast protection technology, the novel flexible coast protection structure has the advantages that the integrity is good, the anti-erosion capability and the coastal erosion deformation adaptability are high, materials are easy to obtain, construction is easy, and maintenance management is convenient; the problem that a traditional rigid seawall bank protector is prone to collapse and damage on the condition of coastal washout deformation can be effectively solved, and a new approach is provided for coast protection.

The invention provides an assembled concrete stepped cross-block coastal anti-erosion structure, which belongs to the field of coastal protection. In the transverse direction, the finger-joining teeth and finger-joining grooves of the lower step plate of the concrete stepped cross block are connected to each other, and a one-way transverse hole is formed at the bottom; Fittingly connected, a unidirectional vertical through hole is formed at the top; the vertical and horizontal connection of the concrete stepped cross blocks forms a staggered and connected sand accumulation hole whose horizontal projection is a rectangle. The effects and advantages of the invention are that the flow of sand from the coast to the sea is suppressed, and the sand that flows with the near-shore current is captured, thereby alleviating the erosion of the coast and helping to protect the coastal beaches; the technical design is reasonable and the operation is convenient; the use of industrial It can effectively reduce the amount of engineering and improve the construction efficiency, and the building materials after demolition can be recycled to avoid the waste of building materials.

The invention discloses an automatic identification method and device for coastal erosion and deposition based on shoreline data, belonging to the field of marine monitoring. The present invention first obtains the coastline vector data of two time phases, and performs topological inspection on the coastline vector data respectively to ensure that the coastline has two endpoints and does not overlap; secondly, based on the coastline vector data of the two time phases, according to a specific spatial analysis method , to automatically obtain the "gap area", and at the same time automatically assign two attributes of "siltation" and "erosion" according to certain rules, and perform consistency check and accuracy evaluation, and finally obtain the distribution range and area of ​​deposition and erosion. The invention can automatically extract erosion and deposition areas, reduce misjudgment, misjudgment, and missed judgment caused by human interpretation, improve detection speed, and can quickly and accurately obtain dynamic changes in coastal intertidal zone information.