JPH0440481B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] This invention relates to a breakwater that can be easily assembled and constructed.

[Prior art]

Conventional breakwaters made of precast concrete blocks require large cargo-handling machines to transport, tow, and throw the heavy concrete blocks into the sea. It was not suitable for fish and shellfish to live there.

[Purpose of the invention]

This invention improves the drawbacks of the conventional breakwater made of concrete blocks, and aims to provide a breakwater that can be easily constructed without requiring large cargo handling machines.

[Structure of the invention]

In the present invention, precast concrete members in the form of wide and long vertical and horizontal thin plates with a rectangular cross section are stacked alternately inward from both ends in a grid pattern and inserted into bolt holes drilled in the overlapping parts. A unit crushed body consisting of a plurality of precast concrete members screwed together with long bolts, and a rectangular precast concrete having a bottom surface whose two sides are equal in length to the vertical and horizontal precast concrete members. The unit frame is installed in a long line on the seabed so that the ends of one of the vertical and horizontal precast concrete members are in contact with each other, and each unit frame and the adjacent unit Rocks are placed in a space surrounded by precast concrete members between the crushed blocks, and the precast concrete slabs are placed on the upper precast members of each unit frame with their ends in contact with each other. It is characterized by

〔Example〕

Hereinafter, this invention will be explained based on the drawings. As shown in FIG. Members 1 and 2 are stacked on the inner side alternately in a grid pattern at a height corresponding to the water depth, and the long bolts 3 are inserted into the bolt holes drilled in the overlapping parts.
Screw them together, assemble the unit frame, and put it into the sea.
The vertical and horizontal concrete members 1 or 2 of the unit frame are successively installed in a long row on the seabed so that their ends touch each other. Next, rocks are poured into the space surrounded by the members 1 and 2 of the unit frame and between the adjacent unit frames, and then the vertical and horizontal concrete members 1 are placed in the upper row of each unit frame. , or 2, a rectangular precast concrete slab 5 having a bottom surface whose two sides are equal in length to members 1 and 2 is placed so as to be in contact with it from its ends. A breakwater with a continuous, flat surface is constructed.

As mentioned above, the breakwater of this invention can be constructed by transporting, assembling, and towing small materials such as precast concrete members, rocks, and precast concrete slabs to the construction site, and does not require large cargo handling machines or equipment. The constructed breakwater can be easily constructed by the loads of each unit frame and precast concrete slab, and by the rock in the space surrounded by the concrete members within the unit frame and between adjacent unit frames. Due to this load, the concrete members and rocks on the bottom of the breakwater sink into the seabed and become stable, creating a breakwater with a continuous, flat surface in the longitudinal direction.

In addition, the breakwater has gaps between the rocks placed in the unit framework and the enclosure between the crushed bodies, so seawater constantly flows back and helps prevent pollution inside the breakwater. The space between the space and the rocks serves as a refuge for young fish, which is effective for their habitat and growth, and has the effect of making it suitable for the inhabitation of shellfish.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an example of a unit frame formed by stacking precast concrete members of the present invention in a cross-shaped structure, and FIG. FIG. 3 is a plan view showing a part of the inserted state, and FIG. 3 is a side view thereof. 1, 2... Precast concrete member, 3
...Long bolt, 4...Rock, 5...Precast concrete version.

Claims (1)

[Scope of Claims] 1. Vertical and horizontal precast concrete members in the form of wide and long thin plates with a rectangular cross section are stacked alternately inward from both ends in a parallel grid shape, with bolt holes drilled in the overlapping parts. A unit frame consisting of a plurality of precast concrete members screwed together with long bolts inserted through the rectangular rectangular precast concrete member having a bottom surface with two sides having equal lengths to the vertical and horizontal precast concrete members. The unit frame is installed in a long line on the seabed so that the ends of one of the vertical and horizontal precast concrete members are in contact with each other, and each unit frame is Rocks are placed in a space surrounded by precast concrete members between the unit frames, and the precast concrete slabs are placed on the upper precast members of each unit frame with their ends in contact with each other. A breakwater characterized by: