JP2016098609A - Inflow sediment processing method in dam storage lake - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inflow sediment processing method in a dam storage lake in order to rationally remove sediment that flowed into and accumulated in the dam storage lake.SOLUTION: A inflow sediment processing method in a dam storage lake comprises following processes: raising a peripheral wall of a floating boat with buoyance for storing sediment dug out of a lake bed depending on an increase in the stored sediment; raising the peripheral wall by connecting and assembling blocks in stages whenever an inside of the peripheral wall is filled with the sediment; raising the peripheral wall to a required height depending on a set water level and filling the inside of the peripheral wall with the sediment; flattening the sediment surface by land elevation; and constructing a lake facility on the flattened surface.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a method for treating inflow sediment in a reservoir of a dam intended to rationally exclude sediment deposited in the reservoir having a dam.

  Recently, according to a public survey, it was confirmed that sediment from the river was deposited in the reservoir of the dam, preventing the dam from securing a substantial amount of water. And by increasing such deposits, the design service life set for dam lake construction will be significantly shortened.

In order to avoid such problems, conventionally, it is customary to take measures such as digging up and lifting the sediment at the bottom of the lake and loading it in a dump etc. and moving it to the required sediment collection point. It was.

  The conventional means described above not only requires enormous expenses and time for transporting earth and sand, but also causes problems such as a large amount of earth and sand gathering in the earth and sand collection site and being treated. It will cause pollution problems such as traffic congestion, exhaust gas scattering based on traffic, and unexpected earth and sand scattering during transportation.

  The present invention is intended to provide a novel “method for treating inflow sediment in a reservoir of a dam” that solves such problems.

  According to the present invention, the floating ship main body having buoyancy for accommodating the earth and sand excavated from the bottom of the lake, and the peripheral wall having buoyancy for connecting to the floating ship main body are sequentially raised according to the increase of the earth and sand to be received. The raising of the peripheral wall is carried out step by step every time the earth and sand are full, the height is raised according to the set water level based on the level of the dam lake, and the inside of the earth is filled with earth and sand. In this situation, the surface of the dam is flattened by depositing the surface, and a facility on the lake is constructed on the flattened upper surface.

  The present invention provides the dam according to claim 1, wherein the formation of the entire wall including the floating ship body or the formation of the peripheral wall portion based on the stepwise connection assembly is performed based on the combination connection of the single blocks. The processing method of the inflow sediment in a reservoir is made into the embodiment.

The present invention is based on the use of the structure as described in claim 1 and is used to treat the earth and sand excavated from the dam lake on the surface of the dam lake, that is, to form the floating island for constructing the facility on the lake. In order to use it as a material, it will be treated on site without moving the excavated earth and sand.
Therefore, when this is moved to a trash dump, etc., it will cause pollution problems such as traffic jams, exhaust gas scattering based on the traffic of dump trucks, and even unforeseen landslides during transportation. There is nothing. And since the excavated earth and sand at the site is used as a material for constructing the facilities on the lake, the construction is inexpensive and quick.

  According to the present invention, as described in claim 2, the entire formation including the floating ship body or the formation of the peripheral wall portion based on the stepwise connection assembly is performed based on the combination connection of the single blocks. Therefore, it is possible to improve the speed and simplicity of construction and the simplicity of work.

1 is a schematic diagram illustrating an embodiment of the present invention. 1 is an explanatory schematic diagram illustrating one embodiment of the present invention. It is a schematic diagram for explanation when a float is provided outside. 4 is an explanatory schematic diagram showing another embodiment of the present invention. 1 is a schematic diagram illustrating a floating island formed according to the present invention.

The present invention provides a buoyant ship body having buoyancy for accommodating earth and sand excavated from the bottom of a lake, and a peripheral wall having buoyancy for connecting to the float ship body in accordance with an increase in the amount of earth and sand to be accommodated. Raising is done step by step every time the earth and sand are full, and the height is raised according to the set water level based on the water level of the dam lake, and the inside is filled with earth and sand. In this case, the surface is flattened by embankment, and a facility on the lake is constructed on the flattened upper surface.

  And, it is an embodiment that the entire formation including the floating ship body or the formation of the peripheral wall portion based on the stepwise connection assembly is performed based on the combination connection of the single blocks. .

  FIG. 1 shows the work process of the present invention, where A is a dam and B is earth and sand flowing into the lake bottom. In the figure, (a) represents a basic floating ship body 1. As shown in FIG. 2, the floating ship body 1 has a function of discharging moisture of earth and sand contained therein by laying a permeable sheet 1 a on the bottom surface and covering the inner surface of the peripheral wall with a protective sheet 1 b. It is in the form of presenting. In addition, since the water | moisture content of the contained earth and sand is given the force which is discharged outside with the earth and sand pressure based on accommodation, the strong discharge | emission is made against the water pressure of a lake. In addition, such a structure is unnecessary when moisture removal is not required, for example, when most of the rocks are used.

  The above-described floating ship body 1 floats on the surface of the lake as shown in FIG. 1 (a), and digs and stores the earth and sand B flowing into the bottom of the lake with a ship hopper or the like. And when this is full, the surrounding wall of the floating ship body 1 is raised as shown in FIG. The raising is performed based on the combined connection of the single blocks 2 as shown in FIG. The block unit 2 uses known blocks such as those disclosed in publicly known techniques, for example, Japanese Patent Laid-Open No. 63-268823 and Japanese Patent Laid-Open No. 10-252108. Detailed description is omitted.

  By the way, the above-mentioned floating ship body 1 as a whole, and when the floating ship body 1 as a whole is formed as a single block as shown in FIG. By placing urethane or the like in the tank, it should have buoyancy, or by attaching the float 3 to the side as shown in FIG. It is constituted as follows.

  Further, the above-described floating ship main body 1 may be configured to be an integrally formed floating ship main body 1a as shown in FIG. 4 except that it is formed as a single block as shown in FIG. Furthermore, as a means for raising the peripheral wall, the frame-like peripheral wall 4 may be gradually stacked as shown in FIG. 4 except that it is based on the combined connection of the single blocks as shown in FIG. In this case, buoyancy is imparted to the frame-shaped peripheral wall 4 itself, or buoyancy is obtained by an external float as described above.

  In the state where the required height is raised as described above, and the inside is filled with earth and sand, the upper surface thereof is flattened with no embankment or the like, and the flattened surface is subjected to fishing grounds or parks, By constructing the necessary facilities on the lake such as an amusement park, a floating island facility as shown in FIG. 5 is formed.

  And when the water level of the dam lake falls, the bottom of the dam facility comes into contact with the bottom of the dam. In this case, spiked feet are provided at the bottom of the dam to prevent it from shifting in the grounded state. Alternatively, it is preferable that the bottom portion of the floating ship body be formed in a flexible form that can be fitted to the bottom of the lake.

  Further, when the water level of the dam lake rises, it will float as shown by the chain line in FIG. And when the water level reaches the dangerous value, the dam is discharged, so it doesn't flow out of the dam lake.

  The present invention takes the steps as described above, and receives the earth and sand excavated from the dam lake on the surface of the dam lake, so that the earth and sand can be used as a material for forming floating islands for constructing the facilities on the lake. Therefore, it is considered as on-site processing without moving the excavated earth and sand.

A dam B earth and sand
1 Ukifune body
1a Monolithic floating body
2 blocks alone
3 Float
4 Frame-shaped peripheral wall

Claims (2)

The buoyant ship main body having buoyancy for accommodating the earth and sand excavated from the bottom of the lake, and the peripheral wall having buoyancy for connecting to the buoy ship main body are sequentially raised according to the increase of the earth and sand to be accommodated, When the soil is full, it is performed step by step, and when it is raised to a height corresponding to the set water level based on the water level of the dam lake, A method for treating inflow sediment in a reservoir lake of a dam, where the surface is flattened by embankment and a lake facility is constructed on the flattened upper surface. 2. The inflow into the reservoir of the dam according to claim 1, wherein the formation of the entire wall including the floating ship body or the formation of the peripheral wall portion based on the stepwise connection assembly is performed based on the combination connection of the single blocks. Sediment disposal method.