Artificial islands create structures

Abstract

Because there is no established method for processing and effectively utilizing the mud generated during the extraction of rare earth resources, this invention provides an artificial island construction structure that balances reducing environmental impact with resource recycling. [Solution] After rare earth extraction, mud is recovered and solidified by compression, drying, and the addition of a hardening agent, etc., and solidified soil 2 is used to stack solidified soil blocks 4 with an uneven shape having recesses and protrusions on the top, bottom, left, and right sides to form a revetment rock wall. Inside this wall, the remaining rare earth soil after extraction is used to fill in and create an artificial island. This structure allows for the gradual expansion of the artificial island while effectively utilizing the mud and reducing the environmental burden.

Description

Technical Field

[0001] This invention relates to an artificial island construction structure using a technology for recovering and solidifying mud generated after rare earth collection, and particularly relates to a technology for constructing a rock wall for a shore protection and for the step-by-step expansion of an artificial island.

Background Art

[0002] Conventionally, the mud generated after rare earth resource collection has often been discarded as unused, and the environmental load has been a problem. Also, a method for constructing a stable shore protection structure at low cost in artificial island construction has been demanded.

Summary of the Invention

Problems to be Solved by the Invention

[0003] A method for treating and effectively utilizing the mud generated with the collection of rare earth resources has not been established, and there is a demand for providing an artificial island construction technology that achieves both reduction of environmental load and resource recycling.

Means for Solving the Problems

[0004] The mud after rare earth collection is recovered, and solidified residual soil obtained by solidification such as compression, drying, and addition of a solidifying agent is used to stack solidified residual soil blocks with a concavo-convex shape (having concave and convex parts vertically and horizontally) to form a rock wall for shore protection, and the residual soil after rare earth collection is filled inside it to construct an artificial island, thereby achieving effective utilization of the mud and reduction of environmental load while having a structure for step-by-step expansion of the artificial island.

Brief Description of the Drawings

[0005] □ Fig. 1: Plan view of the artificial island construction structure. The outer periphery is surrounded by a rock wall for shore protection ▲1▼, and the inside is filled with residual soil (solidified residual soil) ▲2▼ after rare earth collection to form an artificial island. □ Figure 2: Cross-sectional view of the artificial island construction structure. ▲1▼ The revetment rock wall is constructed by stacking ▲4▼ solidified excavated soil blocks, each having an uneven shape, and ▲2▼ excavated soil (solidified excavated soil) remaining after rare earth extraction is filled inside. Additionally, a ▲3▼ reservoir for temporarily storing seawater may be provided in part of the revetment rock wall. □ Figure 3: An example of the shape of the solidified soil block that constitutes the revetment rock wall. The concave and convex parts suppress displacement and collapse during stacking. Detailed explanation of the invention

[0006] This invention relates to a technology for creating artificial islands using mud generated after the extraction of rare earth resources and solidified from that mud. In particular, it relates to the construction of revetment walls using solidified soil and the gradual expansion of artificial islands. Figure 1 is a plan view of the artificial island construction structure according to the present invention. The artificial island consists of a revetment rock wall formed on its outer perimeter (1) and surplus soil (solidified surplus soil) after rare earth extraction, which is filled inside the revetment rock wall (2). The revetment rock wall is made by continuously arranging layers of solidified surplus soil and surrounds the outer perimeter of the artificial island. The surplus soil (solidified surplus soil) after rare earth extraction is solidified surplus soil that has been filled into the shallow waters inside the revetment rock wall and forms the main body of the artificial island. Figure 2 is a cross-sectional view of the artificial island construction structure. The outer perimeter ▲1▼ revetment rock wall is constructed by stacking ▲4▼ solidified excavated soil blocks that have an uneven surface. ▲4▼ Solidified excavated soil blocks are made by recovering mud after rare earth extraction and solidifying it through methods such as compression, drying, and the addition of a hardening agent. This gives them a stable shape and prevents displacement and collapse when stacking them. ▲2▼ excavated soil (solidified excavated soil) after rare earth extraction is filled inside the rock wall to form the ground of the artificial island. Furthermore, in the artificial island construction structure according to this invention, a configuration may be adopted in which a ▲3▼ reservoir is provided in a part of the revetment rock wall to temporarily store seawater. ▲3▼The reservoir serves an auxiliary function to facilitate the sedimentation and separation of rare earth-containing sediment, drainage regulation, and smooth coordination between the collection process and the construction process. Figure 3 shows an example of the shape of a solidified soil block. To enhance stability when stacked, the block surface is provided with recesses and protrusions. This allows adjacent blocks to interlock, which helps to suppress lateral displacement and collapse. This invention makes effective use of mud generated during the extraction of rare earth resources, thereby reducing environmental impact and promoting resource recycling, while also allowing for the gradual expansion of the artificial island. In the future, plants can be planted on the constructed artificial island, giving it the function of an oxygen supply source. Furthermore, in this artificial island construction structure, the internal area enclosed by the revetment rock wall can be used as a storage area for temporarily storing muddy material containing rare earth elements. A configuration can be adopted in which muddy material is accumulated in the storage area, seawater is drained from the area, and rare earth components are separated and extracted from the resulting muddy material. The muddy material obtained as residue after extraction can be solidified by compression, drying, or the addition of a solidifying agent, and then reused as the aforementioned landfill material. Thus, this structure allows for the integrated process of recovering rare earth resources and constructing artificial islands, offering advantages in terms of resource recycling and reducing environmental impact. As described above, this invention encompasses a technology for recovering and solidifying rare earth-element mud and a method for constructing artificial island structures, and possesses new technological effects that are industrially useful and environmentally friendly.

Claims

1. It is an artificial island construction structure, ▲1▼ A revetment rock wall surrounding the outer perimeter of the artificial island, made from muddy material containing sludge after rare earth extraction, and ▲2▼ revetment rock wall filled inside the revetment rock wall with reclaimed soil (solidified soil) after rare earth extraction. Equipped with, The aforementioned revetment rock wall is composed of solidified excavated soil blocks having irregularities arranged in layers, and is characterized in that displacement and collapse during layering are suppressed.

2. In the artificial island construction structure (as described in claim 1), An artificial island construction structure characterized by being configured to allow for the gradual expansion of an artificial island by sequentially reclaiming multiple artificial island construction areas and stacking solidified soil blocks to construct a revetment rock wall around the perimeter.

3. In the artificial island construction structure (as described in claim 1 or 2), An artificial island construction structure characterized by having a configuration in which plants are planted on the upper surface of the constructed artificial island.

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