JPH059576B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a light caisson reclamation method used when constructing a reclaimed seawall or an artificial beach.

"Prior art and its problems" When constructing a reclaimed sea wall, for example, a caisson is sunk in water, the bottom of the caisson reaches the foundation, and then the land side of the caisson is reclaimed. The bottoms of rivers and other rivers are covered with soft ground, and the foundations are located quite deep, making it difficult to construct caissons.
Since the caisson sinks a lot, there was a problem in that even when the water bottom was shallow, a large caisson with a deep bottom was required.

This invention was made in view of the above circumstances, and aims to easily construct a reclaimed seawall by fixing a caisson on soft ground at the bottom of the water.

"Means for Solving the Problems" The light caisson reclamation method of the present invention, when constructing a reclaimed seawall or an artificial beach, submerges a light caisson with its interior centered in water and places it on soft ground. The lower part of this light caisson is fixed to the deep part of the soft ground with an anchor, a tail is provided on the land side of the light caisson, and the tail is buried by filling in the land side of the light caisson. This is to fix the land-side side of the light caisson.

"Function" In the light caisson reclamation method of the present invention, the caisson is lightweight by using a light caisson with a hollow interior. The light caisson is fixed to the ground and resists the lifting force applied to the light caisson, and the tail provided on the side of the light caisson resists the earth pressure due to the buried soil, so the light caisson is stable on soft ground. Fixed.

"Embodiment" An embodiment of the present invention will be described below with reference to FIG.

The light caisson reclamation method of this embodiment is carried out to create a reclaimed revetment on a riverbank, etc., and a plurality of light caissons 1 are submerged in water in a line along the riverbank. A caisson 1 is placed on the soft ground 2, and the lower part of the light caisson 1 is fixed to the deep part 4 of the soft ground 2 using the anchor 3, and a tail 5 is attached to the land side side of the light caisson 1. established,
Furthermore, the land side of the light caisson 1 is buried, and the tail 5 is buried in the buried soil 6, thereby fixing the land side side of the light caisson 1.

The light caisson 1 is made of an artificial material such as reinforced concrete, and is formed in the shape of a box with a hollow interior.The light caisson 1 sinks in water and further sinks when placed on soft ground 2. It is constructed to have a specific gravity (approximately 1.1) that does not overwhelm. The green part around the light caisson 1 has a plurality of anchors 3 for fixing the light caisson 1 to the deep part of the soft ground 2.
...is provided. The anchor 3 is made of a wire rope or a steel bar, which is provided vertically through the light caisson 1, and its upper end is fixed to the upper end of the light caisson 1, and its lower end is fixed to the upper end of the light caisson 1. The lower end portion extends downward and is located in the deep layer 4 of the soft ground 2, and a fixing member 7 is provided at the lower end portion located in the deep layer 4, and this fixing member 7 absorbs the lifting force applied to the light caisson 1. Resisting that light caisson 1
is fixed to the deep layer 4.

Furthermore, the ground on which the caissons are placed is particularly soft.
If there is a risk of subsidence even if the light caisson 1 is used, as shown in FIG. The light caisson 1 is placed on top of the light caisson 1, and then the anchor 3 is fixed to the support base 9, and then the light caisson 1 is fixed by pulling the anchor 3 and applying tension.
It is desirable to fix it to the support base 9.

In addition, as shown in FIG. 1, on the land side side of the light caisson 1, there is a
A plurality of tails 5 are provided for fixing to the buried soil. This tail 5 is made of an elongated steel plate, and one end of the tail 5 is fixed to the land-side side of the light caisson 1 with both sides facing upward and downward.

In addition, in this example, the case of constructing a reclaimed seawall was explained, but according to the light caisson reclamation method of the present invention, on river banks, coasts, etc.
Various structures other than reclaimed seawalls can be constructed. For example, if you stop stacking light caissons below the water's surface, you can create an artificial beach.

Furthermore, this light caisson reclamation method can also be applied to constructing a breakwater, as shown in Figure 3. In this case, both sides of the light caisson 1 will be submerged in the sea, so the tail will no longer be necessary, but as shown in FIG. It is desirable to allow the seawater on both sides of the caisson 1 to move relative to each other. If you do this,
Since the water pressure applied to the light caisson 1 from the side can be alleviated, the light caisson 1 can always be stably supported on the soft ground 2, which is particularly effective when the water is deep. .
Further, when a plurality of the above-mentioned through holes 10 are provided, it is more effective if the size of each through hole 10 is sequentially increased as the water depth becomes deeper, as shown in FIG.

"Effects of the invention" According to the light caisson reclamation method of this invention,
When constructing a reclaimed seawall or an artificial beach, etc., a hollow light caisson is submerged in water and placed on soft ground, and the lower part of this light caisson is fixed to the deep part of the soft ground with an anchor. , a tail is provided on the land side of the light caisson, and the land side of the light caisson is buried, and the tail is embedded in the buried soil to fix the land side of the light caisson. The caisson can be stably fixed on soft ground at the bottom of the sea, etc.
This makes it possible to easily construct reclaimed seawalls, artificial beaches, etc. at low cost.

[Brief explanation of the drawing]

Figures 1 to 4 are diagrams showing one embodiment of the present invention, in which Figure 1 is a schematic configuration diagram of a reclaimed seawall constructed using light caissons, and Figure 2 is a diagram of another reclaimed seawall. Figures 3 and 4 are schematic diagrams of the breakwater. 1...Light caisson, 2...Soft ground, 3...
...Anchor, 4...Deep part, 5...Tail, 6...
... Filled soil, 7... Fixed member.

Claims (1)

[Claims] 1. When constructing a reclaimed sea wall or an artificial beach, etc., a hollow light caisson is submerged in water and placed on soft ground, and the lower part of this light caisson is fixed to the deep part of the soft ground with an anchor. In addition, a tail is provided on the land-side side of the light caisson, and the land-side side of the light caisson is further buried in reclaimed soil to fix the land-side side of the light caisson. Light caisson reclamation method.