JP2662626B2 - Landfill method - Google Patents

Description

The present invention relates to a landfill method in a water area such as a waterfront.

"Prior art and its problems" Generally, it is desirable to construct various structures on the waterfront such as the seafront because of good location conditions. However, most of such waterfronts are in landfills. Therefore, the soft layer is thick, and there is a possibility that harmful settlement or destruction may occur on structures, pavements, and the like installed on the soft layer.

For this reason, in the past, pre-filling was performed in advance at the site where the landfill was to be constructed, and after increasing the bearing capacity of the foundation ground due to consolidation, the embankment was removed, and then the structure was built on it ( So-called loading method). However, such a construction method requires a soil cost for loading, a laying work cost, a disposal cost of remaining soil for removal, and the like, and a long consolidation period (about two to three months).
Therefore, the construction cost tends to be high.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a landfill method capable of performing consolidation in a short period of time and at low cost when a landfill is created in a water area.

[Means for Solving the Problems] In the landfill method according to the present invention, when constructing a landfill in a water area, landfill earth and sand are packed in advance in a bag having a number of flexible bodies in a compacted state. Landfill is performed by stacking bags at the landfill site.

[Effect] According to the landfill method of the present invention, by filling landfill soil into a large number of bags in advance in a compacted state, the time required for compaction of the landfill can be greatly reduced.

"Embodiment" The drawings show an embodiment applied to a water area such as a waterfront of the present invention, and a landfill method according to the present invention will be described below in the order of steps.

(1) Preparation of bag body First, landfill 2 for landfill 1 is packed into a large number of flexible bag bodies 3..., And their mouths are closed. The landfill 2 is compressed, dehydrated, and coagulated to increase its density by uniformly applying pressure by a pressure means. The landfill soil 2 may be, for example, dredged sand or sediment collected from a mountain. Further, the bag body 3 is made of, for example, a cloth that can withstand the compaction operation of the stored landfill soil 2.
A material such as vinyl chloride or rubber may be used.

(2) Landfill Creation When a large number of bags 3 containing the compacted soil (landfill soil 2) are prepared in this way, for example, on the ground 7 around the landfill site 6 in the water area 5 such as a waterfront. Water stop wall 8
And drains the seawater inside to the outside water area 5. The water stop wall 8 may be a steel sheet pile or an existing caisson, or may be a concrete embankment that also serves as a seawall. Then, the bags 3 are loaded on a carrier and transported to the landfill site 6 by the sea, and the bags 3 are lowered into the water stop wall 8 and are laid in close contact with the bottom surface and are sequentially stacked upward.

After the landfill 1 has been almost completed in this way, the landfill 1 is completed by spreading the upper surface of the landfill 1 and disposing of the remaining soil.

As a means for transporting the bags 3, there is also a belt conveyor system extending from the land where the bags 3 are temporarily placed to the landfill site 6, and any of them is selected and is optional depending on the situation.

According to this embodiment, the following excellent effects can be obtained.

Since the landfill 2 is packed in the bags 3 in advance and these are compacted by the pressurizing means, the time required for compacting the landfill 1 is greatly reduced as compared with the conventional compacting method using embankment. And the consolidation efficiency of the landfill 2 filled in the bag 3 can be improved.

Since the bag body 3 is flexible, a large number of bag bodies 3 can be placed in the landfill site 6 in close contact with each other without gaps, and since the bag body 3 is in a good sitting state, the ground of the landfill 1 is grounded. Can be kept in a very stable state. Therefore, the consolidation effect of the entire landfill 1 can be further enhanced, and the ground of the landfill 1 can be made stronger together with the above-mentioned effect.

Since soil for consolidation is not required as in the case of embankment loading, the cost of soil for consolidation can be reduced, and pre- and post-processes of consolidation are not required. Costs can be significantly reduced.

In this embodiment, the water-blocking wall 8 is constructed on the ground 7 of the water area 5 and the bags 3 are sequentially stacked from the bottom inside the water-blocking wall 8. Alternatively, the bags 3 may be stacked in the upper half thereof. In this case, the landfill cost can be reduced while securing stable ground.

[Effect of the Invention] As described above, according to the landfill method of the present invention,
When constructing a landfill in the water area, landfill soil was previously packed into a large number of flexible bags in a compacted state, and these numerous bags were stacked on the landfill site for landfill. Therefore, the period required for consolidation of the landfill can be significantly reduced, and the consolidation effect can be further enhanced.

In addition, since there is no need for the cost of the soil for the loading, the cost of laying the floor, the cost of disposing of the remaining soil, and the like, the consolidation cost of the landfill can be significantly reduced in addition to the effects described above.

[Brief description of the drawings]

The drawings are explanatory diagrams of a landfill method showing an example in which the present invention is applied to a water area such as a waterfront. 1 ... landfill, 2 ... landfill, 3 ... bag, 6 ... landfill site.

Claims (1)

(57) [Claims] When a landfill is created in a body of water, landfill earth and sand are packed in advance into a large number of flexible bags in a compacted state, and the large number of bags are stacked on a landfill site to be landfilled. Landfill method characterized by performing.