JPS59126812A - Construction of marine structure - Google Patents

Abstract

PURPOSE:To construct a light-weight marine structure suitable for the inhibitation of fish and shellfish by packing rocks or concrete into a frame formed by alternately stacking precast concrete slabs in projected parallels. CONSTITUTION:Precast concrete slabs 1 and 2 are stacked alternately and assembled in projected parallels and fixed to each other by fitting parts 3, e.g., bolts, etc. The frame assembly is charged into sea, and rocks 4 are put into the frame composed of the concrete slabs 1 and 2. Instead of the rocks 4, concrete may be packed into the frame to form a concrete levee. Afterwards, the upper floor portion may be made of concrete.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for constructing underwater structures, for example for constructing banks and nest zones for fish and shellfish.

Conventionally, in order to construct an underwater structure such as a concrete embankment, it was necessary to transport or tow a large block of concrete, and since the surface of this concrete construction machine is smooth and flat, it is not suitable for the habitat of fish and shellfish. The country is not suitable for

This invention improves the drawbacks of the conventional concrete embankment.

The present invention will now be explained based on the drawings. Figures 3 and 4 show underwater structures constructed by the method of the present invention, and are side views of a bank and a fish nest, respectively. be. When constructing these underwater structures, first, as shown in Fig. 1, plate-shaped precast concrete members 1 and 2 are assembled by stacking them alternately in a grid pattern, and members 1 and 2 are fastened together using fastening members 3 such as bolts. Then, put this into the sea, and then put rocks 4 into the frame made up of members 1 and 2 as shown in Figure 2, and arrange them on the embankment structure or sandy coastline as shown in Figure 3. A fish nest area is constructed as shown in Figure 4.

It is also possible to make a concrete machine by filling concrete into the frame where rocks are placed, and as shown in Fig. 3, after putting rocks into the frame, the upper floor part can be made into a concrete structure 5. You can also do it.

According to the above-described energization method of the present invention, only the framework is transported, so the weight is extremely small, and therefore the equipment can be small. In addition, this structure has a large number of shelf spaces formed by members 1 and 2 around it, and therefore has a remarkable effect on the inhabitation and growth of living things. Furthermore, since there are gaps between the rocks placed in the frame, seawater constantly flows back, which helps prevent pollution in the bay and is also suitable for fish and shellfish to live in.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of the concrete framework used in the method of the present invention, Fig. 2 is a plan view showing the state in which rocks are put into this framework, and Figs. 3 and 4 respectively show the embankment and It is a side view of a fish nest zone. 1.2... Concrete members 3... Fastening members 4... Rocks 5... Concrete structure of embankment Figure 1 Figure 2

Claims (1)

[Claims] A method of constructing an underwater structure characterized by stacking plate-shaped precast concrete members alternately in a cross-shaped structure, and filling a frame made up of the concrete members with rock or concrete.