JPH0336367B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method of manufacturing a caisson used for a seawall or a breakwater, etc., which allows the caisson to be manufactured on the water near its installation site.

[Prior art]

Conventionally, caissons used as gravity type seawalls or breakwaters have been manufactured in onshore caisson yards, dry docks, and the like. A caisson manufactured in an onshore caisson yard is hoisted by a hoist and launched into the water; if it is manufactured in a dry dock, it is launched into the water by injecting water into the dock, and is towed by a tugboat. It is usually moved to an installation location or temporary storage location.

In these cases, there was a problem in that the size of the caisson to be manufactured depended on the capacity of the hoist and the scale of the dry dock.

[Purpose of the invention]

Therefore, the present invention was made to solve the above-mentioned conventional problems, and its purpose is to provide a construction method that allows large caissons to be formed on the water, regardless of the capacity of the hoist or the scale of the dock. This is what I did.

[Structure of the invention]

That is, the method for manufacturing a caisson of the present invention involves floating one or many connected barges capable of pouring water onto the water surface, attaching a bottom formwork to the barge, and pouring concrete for the caisson bottom slab. After curing, concrete pouring and curing of the caisson wall are carried out while assembling the buoyant wall formwork in stages, and then the caisson is launched while sequentially pouring water into the barge. configured.

EXAMPLE An example of the procedure for manufacturing a caisson using the method of the present invention will be described below with reference to the drawings. First, as shown in FIG. The barge 1 is floated on the water surface W, and the bottom formwork 2 of the caisson to be formed is attached to the screen board on the upper surface of the barge 1, as shown in FIG.

Next, as shown in FIG. 3, the caisson bottom plate 3A is concreted and cured within the bottom form 2.

Next, as shown in FIG. 4, the first wall formwork 4A is assembled, and the fifth
While assembling the second stage wall formwork 4B and the third stage wall formwork 4c in stages as shown in Figures 6 and 7, pouring concrete for the caisson wall section 3B. and curing will be carried out sequentially.

Here, spaces are formed in these walls 4A, 4B, and 4C to provide buoyancy.

Next, as shown in Figures 7 and 8, the freeboard form 5 for the freeboard section 3C of the caisson is assembled, and concrete is poured and cured. Since it is located at , it does not need to be buoyant or buoyant.

Once the caisson 6 is completed as described above, it is separated and removed individually under water while pouring water into the barge 1 as shown in Fig. 9, and then the wall formworks 4A, 4B, 4C and the freeboard frame 5 are removed. As shown in Figure 10, the caisson 6 is completed, a lid 7 is attached to prevent wind and waves, and it is towed to the installation site.

In the above embodiment, a split type barge 1 in which a number of barges are connected is used, but of course it is also possible to use a single integrated barge 1, and a split type barge 1 is used. By using the barge 1, the size of the barge 1 can be changed freely and its manufacture becomes easy.

〔Effect of the invention〕

Therefore, if the caisson manufacturing method of the present invention is adopted, the ability of the hoist ship during hoisting,
When manufactured in a dry dock, it is not affected by the scale of the dry dock, making it possible to manufacture large-scale caisson, and it can also be manufactured near the installation site, which also has the effect of reducing towing costs. be.

Furthermore, since the wall formwork can be filled with water, even if the buoyancy of the barge is insufficient during the manufacture of the caisson, the buoyancy of the wall formwork can compensate for this buoyancy. be.

[Brief explanation of the drawing]

Figure 1, Figure 2, Figure 3, Figure 4, Figure 5, Figure 6, Figure 7, Figure 8, and Figure 9 are examples of the steps for manufacturing a caisson using the construction method of the present invention. FIG. 10 is a side sectional view showing an example, and FIG. 10 is a side view showing the caisson completed as described above. 1... Barge, 2... Bottom formwork, 3A... Caisson bottom plate, 3B... Caisson wall, 4A, 4B, 4C
... Wall formwork, 6... Caisson, W... Water surface.

Claims (1)

[Claims] 1. Floating one barge or a number of barges connected to each other capable of pouring water and water on the water surface, assembling the bottom formwork on the barge, and after pouring concrete and curing the caisson bottom slab, a buoyant barge is constructed. A method for producing a caisson, which comprises sequentially assembling the part formwork in stages, sequentially placing and curing concrete on the wall of the caisson, and then launching the caisson while sequentially pouring water into the barge.