CN213427800U

CN213427800U - Engineering device for repairing near-shore broken coral reef

Info

Publication number: CN213427800U
Application number: CN202022032881.9U
Authority: CN
Inventors: 李秀保; 穆大伟; 王爱民; 李艳; 夏景全; 刘相波; 王丰国; 丁峰
Original assignee: Hainan University
Current assignee: Hainan University
Priority date: 2020-09-15
Filing date: 2020-09-15
Publication date: 2021-06-15
Anticipated expiration: 2030-09-15

Abstract

The invention discloses an engineering device for repairing a broken coral reef near shore. The concrete frame comprises a cuboid concrete frame body, wherein a grid plate is fixedly connected to the upper surface of the frame body, the height of the frame body is 0.6-1m, and the aperture of meshes of the grid plate is 4-8 cm. The utility model is suitable for a restore nearly bank water 4-10m depth of water, the flat, broken coral reef in bottom. The utility model controls the height of the concrete frame (cement reef) from the bottom to be 0.6-1m, which can obviously reduce the negative effect of the resuspension sediment on the coral and improve the growth rate of the coral and the larva attachment efficiency; the cement reef hollow structure can promote water body exchange, provide more oxygen for the coral, promote the growth of the coral, and provide habitat for fishes and large invertebrates; some fishes can maintain the health state of the broken branches of the planted corals and also improve the survival rate of the planted corals. The pore diameter needs to be controlled to be 4-8cm, so that the competitive attachment growth of the macroalgae can be effectively controlled.

Description

Engineering device for repairing near-shore broken coral reef

Technical Field

The utility model belongs to coral restoration field, concretely relates to restore engineering device of broken coral reef of nearly bank.

Background

The coral reef ecosystem has very important ecological functions and economic values. Abundant coral reefs are distributed in south China sea, and severe reef disc crushing is caused in partial areas due to the influence of typhoons and destructive fishery activities (such as fish frying, giant clam shellfish digging, coral and the like). The natural recovery of the broken coral reef is very slow, and a manual repair mode needs to be adopted.

The prior art has some artificial devices for repairing coral reefs, such as:

CN201610013044.7, a method and a device for improving the growth speed of hermatypic coral, which discloses that a main body frame and an active metal grid are arranged near a hermatypic coral growth sea area, and the active metal grid is covered on the main body frame; the active metal is aluminum-magnesium alloy, wherein the content of magnesium is 2-5%; the main body frame is made of stainless steel; the active metal is used for generating electrochemical corrosion in the seawater to release electrons, so that the concentration of carbonate ions in the seawater in the area is increased, and the growth of the hermatypic coral is accelerated. The aperture of the mesh of the aluminum magnesium alloy mesh is less than 10 cm. The method comprises the following steps: the coral culture method belongs to the field of coral culture, the reef body is poor in stability and is influenced by the growth of competitive seaweed, and the survival rate of transplanted corals is reduced; the patent does not mention the aggregation effect on attachment and attraction of coral larvae to fish, large invertebrates.

Disclosure of Invention

The utility model aims at providing a can effectively reduce the influence of the regional resuspension deposit of nearly bank to coral growth, avoid large-scale marine alga competitive growth to arouse the coral dead very easily to play the engineering device of the broken coral reef of nearly bank of restoration of gathering the fish effect.

The utility model discloses a carry out through following technical scheme:

the utility model discloses an engineering device of restoration nearly bank broken coral reef, including the concrete frame of rectangular bodily form, at the last fixed surface of frame and be connected with the waffle slab, the frame height be 0.6-1m, the mesh aperture of waffle slab be 4-8 cm.

Preferably, the grid plate is a grid plate made of Fiber Reinforced Plastic (FRP), and the FRP is resistant to seawater corrosion and can bear the pressure of coral. Further preferably, lines in the middle of the grid plate are cylindrical, so that the attachment of sediments on the surface of the FRP grid plate can be effectively reduced, and the attachment density of natural coral larvae is increased.

The cuboid concrete frame is preferably 2m long, 1.5m wide, 0.6-1m high and 2.5-3.5T heavy, is hollow I-shaped, and has a reinforcing steel bar frame inside to ensure the stability of the underwater structure and resist the invasion of typhoon.

The utility model is suitable for a restore nearly bank water 4-10m depth of water, the flat, broken coral reef in bottom. The utility model controls the height of the concrete frame (cement reef) from the bottom to be 0.6-1m, which can obviously reduce the negative effect of the resuspension sediment on the coral and improve the growth rate of the coral and the larva attachment efficiency; the cement reef hollow structure can promote water body exchange, provide more oxygen for the coral, promote the growth of the coral, and provide habitat for fishes and large invertebrates; some fishes can maintain the health state of the broken branches of the planted corals and also improve the survival rate of the planted corals. The pore diameter needs to be controlled to be 4-8cm, so that the competitive attachment growth of the macroalgae can be effectively controlled.

When in use, the coral is transplanted and fixed on the FRP grid plate by using the binding belt, and the redundant binding belt is cut off; selecting 3 kinds of coral, such as branch-shaped (cornu Cervi coral), leaf-shaped (Rosa Corallium Thunb) and block-shaped (coral of Arisaema and Arisaema), alternately mixing and fixing the coral, maintaining the spacing of 30-50cm, and selecting coral with multiple growth forms to maintain the diversity of coral and achieve a balance between growth rate and environmental tolerance.

Description of the drawings:

FIG. 1 is a schematic structural view of an engineering apparatus for repairing a near-shore broken coral reef, in which 1, a rectangular parallelepiped concrete frame; 2. and (4) a grid plate.

The specific implementation mode is as follows:

the following examples are further illustrative of the present invention and are not intended to be limiting thereof. The following examples are given without specifying the particular experimental conditions and methods, and the technical means employed are generally conventional means well known to those skilled in the art.

Example 1:

the engineering device (cement reef) of the broken coral reef of repairing nearly bank of this embodiment, including cuboid shaped's concrete frame 1, at the last fixed surface of frame be connected with grid plate 2 (if bind with the nylon rope), the mesh aperture of grid plate be 5 cm. The grid plate is made of Fiber Reinforced Plastic (FRP). The lines in the middle of the grid plate are cylindrical. The cuboid concrete frame is 2m long, 1.5m wide, 0.8m high, 3.1T heavy, hollow I-shaped, and has reinforcing steel bar frame inside to ensure the stability of underwater structure and resist typhoon invasion. The cement reef bottom-separating height is controlled to be 0.8m, so that the negative influence of re-suspended sediments on the coral can be obviously reduced, and the growth rate and the larva attachment efficiency of the coral are improved; the cement reef hollow structure can promote water body exchange, provide more oxygen for the coral, promote the growth of the coral, and provide habitat for fishes and large invertebrates; part of the coral reef functional fishes can maintain the health state of the broken branches of the planted corals and improve the survival rate of the planted corals.

In 8 months in 2019, 20 engineering devices (cement reefs) for repairing the offshore fractured coral reefs of the embodiment are thrown in an ocean ranching area of a tree-branch continental region in a water depth of 5-6m, the bottom of the area is flat and fractured, 3 types of 5 kinds of corals are selected during transplantation, the corals are alternately and mixedly fixed and are kept at intervals of 40cm, the selection of corals in various growth forms is beneficial to maintaining the diversity of the corals, and the balance is achieved in the aspects of growth speed and environmental tolerance. The growth rates of the small leaf coral, the hyacinth coral, the anthurium coronarium, the truncated rose coral and the orange yellow porifera are 206.5%, 174.6%, 200.3%, 35.7% and 58.2% respectively within 12 months and 3 months of 2019. The coral larva supplement amount is 1.64/m within 9 months in 6 months in 2020²。

Claims

1. The engineering device for repairing the near-shore broken coral reef is characterized by comprising a cuboid-shaped concrete frame, wherein a grid plate is fixedly connected to the upper surface of the frame, the height of the frame is 0.6-1m, and the aperture of meshes of the grid plate is 4-8 cm.

2. An engineering device for repairing a near-shore broken coral reef according to claim 1 wherein said grid plate is a fiber reinforced composite grid plate.

3. The apparatus of claim 2, wherein the lines of the grid plate are cylindrical.

4. The engineering device for repairing a near-shore fractured coral reef of claim 1, wherein the cuboid-shaped concrete frame has a length of 2m, a width of 1.5m, a height of 0.6-1m, a weight of 2.5-3.5T, a hollow i-shape, and a reinforcing steel bar frame inside.