JPS62194325A - Deep water-depth type hull caisson - Google Patents

Abstract

PURPOSE:To reduce the cost of construction work as well as to shorten the period of construction by a method in which the bow and stern parts of scrapped ship are cut off, and parallel tanks are cut out and stacked in two stages to form a hull caisson. CONSTITUTION:The bow and stern parts of a superlarge-size scrapped tanker are cut off, and a lower hull caisson 1 is cut out. Furthermore, in the same way for the other scrapped ship, the parallel portion of the hull is cut out and cut-opened bilaterally to obtain an upper hull caisson 2 of two-fold length. Both the caissons 1 and 2 are stacked in two stages to build up a great water- depth hull caisson. The caisson so formed is placed on an asphalt mat 5, filling soil 6 is charged through a hole 7 into the hull for stabilizing a levee, and the back side is embedded with soil 8 to construct a levee at deep depth 9. A parapet 10 is provided on the upper part for preventing overflow of waves and occurrence of corrosion. By two-stage stacking of both the caissons 1 and 2, the levee can be constructed at deep depths of 40-50m.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention is applicable to deep-water seawalls, breakwaters, breakwaters, partition plates, mooring quays, buoyancy tanks, storage tanks, etc. (hereinafter collectively referred to as levee bodies). related to hull caissons used in

[Conventional technology]

Conventionally, concrete caissons, steel cells, steel sheet piles, etc. have been used for embankment bodies such as seawalls, but the maximum water depth for concrete caissons is approximately 25 m due to the equipment capacity of the construction yard. Steel cells and steel sheet piles have long spans from the ground to the top, so there are concerns such as the generation of "1-no-rami" at intermediate heights due to earth pressure and residual water pressure. At deeper locations, mounds were constructed on the seabed and concrete caissons were placed on top of the mounds, and the maximum water depth of these mounds was 15 to 20 meters.

[Problem that the invention seeks to solve]

Therefore, conventional embankments not only have their own limitations on water depth, but also have the disadvantage that constructing embankments for deep water requires enormous costs and construction time to construct mounds.

The present invention was proposed in view of the above circumstances, and is a deep water type that can significantly reduce mound construction, reduce overall construction cost and construction period, and improve the accuracy of the normal line of the levee body. Provide hull caissons.

[Means for solving problems]

To this end, the deep-water type hull caisson of the present invention is characterized by cutting off the bow and tail parts of an abandoned ship to cut out parallel tank parts, which are then stacked in two stages.

[For production]

With this configuration, when constructing a dam body for deep water,
Reduction of mound construction costs and construction period.

By shortening the time, it is possible to achieve a significant overall cost reduction.
Moreover, it is possible to effectively utilize abandoned ships.

〔Example〕

An embodiment in which the present invention is applied to a decommissioned caisson of a super large tanker will be described with reference to FIG.

A small-scale mound 4 is provided for the purpose of providing a flat surface on the seabed ground 3, and if necessary, the mound 4 can be omitted by digging the seabed ground 3 into a flat surface. Set up asphalt mat 5 to raise it.

Cut off the bow and stern of an abandoned ultra-large tanker and cut out the lower hull caisson 1.Furthermore, cut out the parallel hull section of another abandoned ship in the same way, and cut it open left and right to create a double-length upper hull caisson 2.
They are cut out and stacked in two layers to create a hull caisson for deep water use.

This hull caisson was placed on top of the asphalt Myl Build an embankment at depth 9. Furthermore, a rose pet 10 is provided at the top,
It prevents waves from overtopping and also serves as an anti-corrosion measure.

(By stacking the lower hull caisson 1 and the upper hull caisson 2 cut out from a super large tanker,
A deep water embankment with a depth of 50 m is constructed, and compared to conventional construction methods, the cost of mound volume, on-site submersion work, joint joint work, etc. can be significantly reduced, and a long embankment body can be sunk at once. This also prevents mounds from being washed away by tidal waves.

〔Effect of the invention〕

In short, according to the present invention, by cutting off the bow and stern parts of a scrapped ship, cutting out parallel tank parts, and stacking them in two stages, it is possible to reduce the mound construction cost and construction period in constructing an embankment body for deep water.

By shortening the time, it is possible to achieve a significant overall cost reduction.
Moreover, the present invention is extremely useful industrially because it is possible to make effective use of abandoned ships.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view showing one embodiment of the hull caisson of the present invention. 1... Lower hull caisson, 2... Upper hull caisson, 3... Seabed ground, 4... Mound. Sub-Agent Patent Attorney Masa Tsukamoto Figure 1

Claims (1)

[Claims] A deep-water hull caisson characterized by cutting off the bow and stern parts of a scrapped ship to cut out parallel tank parts and stacking them in two stages.