JPS6121235A - Method of dredging and collecting soil through utilization of freezing - Google Patents

Abstract

PURPOSE:To perform simple dredging without a fear of environment being polluted, by a method wherein soil, planned to be dredged, is frozen to cut it in the shape of a block, and a lifting member, previously buried in the block, is lifted up with the aid of a crane for dredging. CONSTITUTION:A support material 1 for carrying frozen soil is inserted into soil under a sea bottom intended to be dredged or excavated, and a freezing device is set in the soil. In which case, a heat insulating material for preventing heat dissipation is laid between soil and bedrock 2. Frozen soil 3, produced by freezing the soil by the freezing device, is cut to blocks with a given size by means of a cutting device, such as cutters, laser, electromagnetic waves. The blockform frozen soil 3 is carried to a tug boat by means of the support material for carrying frozed soil with the aid of a crane 4. This enables simplification of carriage of dredged soil.

Description

[Detailed description of the invention] The present invention relates to a dredging and soil extraction method.

Conventionally, when dredging target soil or collecting soil, work was carried out using pump dredging or grab dredging. Pollution often occurred over a wide area, causing environmental problems and fishery compensation problems.

The present invention was proposed to solve these problems, and involves inserting frozen soil transport source supports into the target soil, setting a freezing device, and freezing the target soil with the freezing device. This method relates to a dredging and earth extraction method using freezing, which is characterized in that frozen soil is created by cutting the frozen soil into blocks, and then the block-shaped frozen soil is transported through the frozen soil transport source support material. It is something.

In the present invention, as described above, frozen soil transport source supports are inserted into the soil to be dredged and collected, and a freezing device is set, and the target soil is frozen by the freezing device to form large lumps of frozen soil. The purpose is to prevent the target soil from dispersing into the water.

In the present invention, the frozen soil thus formed in a large lump is cut into blocks that can be carried out, and the block-shaped frozen soil is carried out to the required location using the carrying out supports that are integrated with the frozen soil. It is something.

Since the target soil is in a frozen state at the time of cutting and carrying out, no water pollution occurs during cutting and carrying out. In addition, the target soil is cut into frozen blocks and transported, making dredging and collection work of the target soil easy, and also makes it easier to transport dredged and collected soil, thereby reducing environmental pollution. The present invention has many advantages, including the fact that there is no risk of causing problems such as fishery pollution, and the present invention can also be applied to the transportation and disposal of food waste, excavation of land areas, and replacement with improved soil. It is possible.

The present invention will be described below with reference to the illustrated embodiments.

As shown in FIG. 1, a frozen soil transport material (1) is inserted into the target dredged soil on the seabed, and a freezing device (not shown) is set.

At this time, a heat insulating layer (
(not shown) to prevent heat dissipation during cutting, lifting, and transportation of frozen dredged soil, which will be described later.

Next, the target dredged soil is frozen by the freezing device to create frozen soil (3).

Next, the frozen soil (3) is cut into blocks of the required size using a cutter or a cutting device using a heat beam such as a laser beam, radiation, high-pressure water jet, electromagnetic waves, or the like.

Next, the frozen soil transport support material (1) inserted in advance as described above is lifted by a floating crane boat (4) or a lifting device (5) such as a land-based crane truck, and cut into the required size. The dredged frozen soil (3) in the form of blocks is carried out and transported to the disposal site by a crane boat (4), or the frozen soil (3) is transported to the disposal site by transport equipment such as a carrier boat, tugboat, barge, or truck. Transport up to.

In addition, while the frozen soil (3) is being transported to the disposal site,
As a general rule, it should be frozen and thawed naturally at the disposal site, or if necessary, thawed using thawing equipment. Possible methods for lifting frozen soil include natural thawing, forced thawing, and transportation and disposal while thawing.

As described above, the illustrated embodiment is a frozen soil transport material that is made by freezing the target dredged soil, cutting it into a shape, inserting it into the target dredging soil in advance, and integrating it with the frozen soil (3). (1
-1, the soil to be dredged can be easily transported, and since the soil to be dredged is frozen at the time of cutting and transport, there is no risk of contamination of the water. .

In the example shown in Fig. 2, the frozen soil supporting material (1)
is horizontally inserted into the soil to be dredged in multiple stages, and after freezing the target soil and creating frozen soil (3), it is cut as shown in the dotted line, and cut into blocks through the struts (1). Frozen soil (3
) is transported to the disposal site, Sake, by a tugboat (6).

Figures 3 and 4 show the case where the present invention is applied to dredging of river canals, waterways, etc., in which frozen soil transport source supports (1) are placed at predetermined intervals in the longitudinal direction of the river, etc. in the soil to be dredged. At the same time, a freezing device (not shown) is set, and a heat insulating layer is constructed between the soil to be dredged and the ground (2) in the same manner as in the above embodiment, and then the freezing device Freeze the soil to create frozen soil (3), cut it in the longitudinal direction as shown by the dotted line, and create the block-shaped frozen soil (3).
A) (aB This also applies to the excavation of areas and the transportation and disposal of garbage, etc.

Although the present invention has been described above with reference to embodiments, the present invention is, of course, not limited to such embodiments, and can be modified in various ways without departing from the spirit of the present invention. .

[Brief explanation of drawings]

FIG. 1 is a vertical cross-sectional view showing the implementation status of one embodiment of the dredging and earth and sand extraction method using freezing according to the present invention, and FIG. 2 is a vertical cross-sectional view showing the implementation status of another example of the present invention. FIG. 3 and FIG. 4 are a longitudinal cross-sectional view and a longitudinal cross-sectional side view, respectively, showing the state of implementation of still another embodiment of the present invention. (1)...Frozen soil transport material, (3)...Frozen soil, (
4)...Cran boat, (6)...Tugboat, (7)...
Crane truck agent Patent attorney Shigeru Okamoto 3 people outside of Bungai No. 10 No. 30

Claims (1)

[Claims] Insert frozen soil transport source supports into the target soil and set a freezing device, freeze the target soil using the freezing device to create frozen soil, then cut the frozen soil into blocks, and then A dredging and earth extraction method utilizing freezing, characterized in that frozen soil is transported through the frozen soil transporting support material.