JPS62233338A - Method for laying of slip inhibitor for caisson - Google Patents

Abstract

PURPOSE:To reduce the cost of construction work as well as shorten the period of construction by a method in which a slip inhibitor is hung down into sea by a crane, a floating caisson is introduced onto the slip inhibitor, and the slip inhibitor is fixed to the bottom of the caisson being floated. CONSTITUTION:A slip inhibitor 2 mounted on a base ship 1 is hung down by an offshore crane 3 into sea, and a caisson 4 is introduced onto the inhibitor 2. A float 7 on the tip of a reinforcing core wire 5 is pulled up and fixed to a fixing metal 8 on the top of the caisson 4. Also, the other core wire 5 is altogether hung down by the crane 3 through a beam 6, the slip inhibitor 2 is tensed and set to the bottom of the caisson 4, and the wire 5 is fixed to the metal 8. The caisson 4 having the inhibitor 2 set to its bottom is filled with ballast and landed on the seabed foundation.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for laying anti-slip material on a caisson that is sunk onto the foundation of a breakwater, seawall, etc.

[Conventional technology]

When constructing a breakwater, partitioned seawall, etc. by sinking a caisson onto an embankment foundation set on the seabed, there is a gap between the embankment foundation surface and the bottom of the caisson to increase the sliding resistance on the foundation surface. Conventionally, anti-slip material was installed on the surface of the embankment foundation using a diameter cutter before the caisson was sunk. Due to poor transparency, the water pressure increases, making it difficult for divers to perform construction work.Due to the decrease in brightness, it is difficult to install anti-slip materials in designated positions, and construction costs increase.

This is inconvenient as it prolongs the construction period.

[Problem that the invention seeks to solve]

The present invention was proposed in view of these circumstances, and
To provide a method for laying anti-slip material for caissons, which allows easy and accurate laying and installation regardless of the water depth, and which is effective in reducing construction costs and shortening the construction period as the water depth increases. purpose.

[Means for solving problems]

To this end, the present invention involves suspending an anti-slip material interposed between the embankment foundation and the caisson sunk thereon into the sea using a crane, introducing a floating caisson onto the anti-slip material, and floating the caisson. It is characterized by installing and fixing an anti-slip material to the bottom of the caisson.

[For production]

With the above-mentioned configuration, it is possible to easily and accurately install the number of layers regardless of the depth of the water, and the method of installing anti-slip material for caissons is effective in reducing construction costs and shortening the construction period as the water depth increases. can be obtained.

〔Example〕

An embodiment of the present invention will be described with reference to the drawings.

Figures 1 to 4 sequentially show the steps of the first embodiment. Figure 1 is a perspective view of the floating caisson and the anti-slip material on the barge, and Figure 2 is a perspective view of the floating caisson and the barge. FIG. 3 is a side view showing the lowered anti-slip material, FIG. 3 is a side view showing the anti-slip material attached to the floating caisson, and FIG. 4 is a side view showing the caisson in a sunken state.

Figures 5 to 8 sequentially show the steps of the second embodiment.
Figure 5 is a perspective view similar to Figure 1, Figure 6 is a side view similar to Figure 2, Figure 7 is a side view similar to Figure 3, and Figure 8 is a side view similar to Figure 4. It is a diagram.

First, the first embodiment will be explained with reference to Figs.
In FIG. 1, the anti-slip material 2 mounted on the barge 1 is
Concrete or steel caisson 4 floating at sea
In order to install it on the bottom of the ship, it will be lifted up by a marine crane 3. The anti-slip member 2 has reinforcing core wires 5 installed at both ends, one end is suspended by a marine crane 3 via a balance 6, and a floating body 7 is attached to the other end.

Next, in FIG. 2, the anti-slip member 2 is lowered from the barge 1 by a marine crane 3, and a caisson 4 is introduced into the position where it hangs into the sea.

Furthermore, in FIG. 3, the floating body 7 at the tip of one of the reinforcing core wires 5 is pulled up from the top end of the caisson 4 and secured to the fixed hardware 8.

At this time, the dialer 9 confirms whether the anti-slip material 2 is placed on the bottom surface of the caisson 4.

The other reinforcing core wire 5 is lifted all at once by a marine crane 6 via a balance 6, the anti-slip material 2 is tensioned, and the reinforcing core wire 5 is placed on the bottom surface of the caisson 4. Similarly, the other reinforcing core wire 5 is also secured to the fixed hardware 8.

Finally, in FIG. 4, the caisson 4 with the anti-slip material 2 laid on the bottom is injected with ballast 10 and is brought to the bottom on the embankment foundation 11 on the seabed.

Next, the second embodiment will be explained with reference to FIGS. 5 to 8.
In FIG. 5, the anti-slip material 2 mounted on the barge 1 is
In order to lay it on the bottom of the caisson 4 floating on the ocean, it is lifted up by two marine cranes 3. A reinforcing core wire 5 is provided at both ends of the anti-slip material 2.

Next, as shown in Figure 6, place the anti-slip material 2 on the barge 1.
It is hoisted up by the marine crane 3 of the ship, and the caisson 4 is introduced into the submerged state.

Furthermore, in FIG. 7, the reinforcing core wires 5 at both ends are lifted up together by two marine cranes 3 via a balance 6, the anti-slip material 2 is tensioned, and the reinforcing core wires 5 are placed on the bottom surface of the caisson 4.

At this time, the dialer 9 confirms whether the anti-slip material 2 is placed on the bottom surface of the caisson 4.

Reinforcing core wire 5' on both ends! i? It is secured to the fixed hardware 8 at the top of the caisson 4.

Finally, in FIG. 8, the caisson 4, with the anti-slip material 2 laid on the bottom, is injected with ballast 10 and is brought to the bottom on the embankment foundation 11 on the seabed.

As explained in the above two embodiments, in the method of the present invention, the anti-slip material 2 is laid and fixed on the bottom surface of the caisson 4 in a floating state by the operation of the marine crane 3, and the material is injected with pallast and the embankment body Since the cable is laid down on the foundation 11, the only work required is to check the placement of the anti-slip material on the bottom of the caisson, and therefore the laying work can be carried out easily and accurately regardless of the depth of the water.

[Effects of the Invention] In short, according to the present invention, the anti-slip material installed between the embankment foundation and the caisson sunk thereon is suspended in the sea by a crane, and the anti-slip material is suspended above the anti-slip material. By introducing a caisson and laying and fixing anti-slip material to the bottom of the floating caisson, it is possible to easily and accurately install a small number of cables regardless of the water depth, reducing construction costs and construction time as the water depth increases. The present invention is industrially extremely useful because it provides a method for laying anti-slip material for a caisson that can achieve the effect of shortening the length of time.

[Brief explanation of drawings]

1 to 4 sequentially show the steps of the first embodiment of the method for installing anti-skid material for a caisson according to the present invention. FIG. 1 is a perspective view showing a floating caisson and anti-slip material on a barge; Figure 2 is a side view showing the floating caisson and the anti-slip material taken down from the barge, Figure 3 is a side view showing the floating caisson with the anti-slip material attached, and Figure 4 is the caisson sunk. FIG. Figures 5 to 8 sequentially show the steps of the second embodiment.
Figure 5 is a perspective view similar to Figure 1, Figure 6 is a side view similar to Figure 2, Figure 7 is a side view similar to Figure 6, and Figure 8 is a side view similar to Figure 4. It is a diagram. 1... Barge, 2... Anti-slip material, 3... Maritime crane, 4... Caisson, 5... Core wire for reinforcement, 6...
・Balance, 7... Floating body, 8... Fixed hardware, 9...
Diaper, 10... Ballast water, 11... Embankment foundation. Sub-Agent Patent Attorney Masa Tsukamoto Box 1 Figure 3 Figure 5 Figure 6 Figure 7

Claims (1)

[Claims] An anti-slip material installed between the embankment foundation and a caisson sunk thereon is suspended into the sea by a crane, and a floating caisson is introduced onto the anti-slip material to float it. A method for installing an anti-slip material for a caisson, which comprises installing and fixing the anti-slip material to the bottom of the caisson.