JP2010242348A - Bank bleach preventing method by stabilizing block for raising bank - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for preventing the occurrence of water channels and capable of raising a bank even in a region where soil can not be acquired. <P>SOLUTION: The bank bleach preventing method comprises a block for raising the bank along its upper part and bags filled with water absorptive polymer particles and arranged between the block and a placement surface of the bank. The block comprises protrusion parts and fixing parts for fixation to the bank. The bags filled with water absorptive polymers are inserted between the fixing parts and the placement surface of the bank. By eliminating the unevenness of the placement surface of the bank through the expansion of the water absorptive polymers, the occurrence of water channels between the surface of the bank and the block during the flooding is prevented, and the block for raising banks is stabilized in the bank bleach preventing method. The water absorptive polymers are arranged between the block and the bank, in which water channel could occur, for preventing the occurrence of water channels to eliminate gaps through the expansion of water absorption by the polymers. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

The present invention belongs to a technique for raising a dike during a flood.

In order to prevent the flooding of rivers, lakes, etc. in the event of flooding, it has been practiced since ancient times to pile up sandbags filled with sand and other fillers in heavy bags such as hemp bags to raise the embankment and prevent breakage. JP-A-2002-69964 and JP-A-2001-81752 propose a method in which a bag filled with a water-absorbing polymer is prepared, and its volume weight is increased by absorbing water and used as a sandbag. Japanese Patent Application Laid-Open No. 2006-283505 and Japanese Patent Application Laid-Open No. 2002-30669 propose a method in which a large number of open and closed frames are arranged in the front-rear and left-right directions and filled with sandbags or soil to be used for raising the bank.
Both methods require the presence of soil, making it impossible to obtain the amount of soil needed in an emergency where there is a risk of rupture in an urbanized area.
For this reason, the present inventors have proposed a method in which blocks are stacked on a dike in Japanese Patent Application No. 2008-281272 as a method capable of raising a dike even in a place where it is difficult to obtain soil. In the present invention, it is required to prevent water from being generated on the installation surface of blocks and dikes.

JP2002-69964 JP2001-81752 JP 2006-283505 A JP2002-30669

This invention exists in the proposal of the water supply generation | occurrence | production prevention method by the method which can raise the embankment of the embankment also in the area where soil cannot be obtained.

The present invention comprises a block for raising along the embankment and a bag containing water-absorbing polymer particles arranged between the block and the embankment installation surface, and the block is fixed to the protruding portion and the embankment. The water-absorbing polymer bag is inserted between the fixed part and the embankment installation surface, and the water-absorbing polymer expands to eliminate unevenness of the embankment installation surface. This is an embankment breakage prevention method that stabilizes the embankment block by preventing the occurrence of waterworks.
In order to prevent the occurrence of water supply, a water-absorbing polymer was placed between the block where the water supply was generated and the embankment, and the gap was eliminated by the expansion of the polymer due to water absorption.

In the present invention, when a block is installed on a dike, a water-absorbing polymer is disposed on the dike surface and the ground contact portion of the block. Since it disappears, the formation of water supply can be prevented.

These are the conceptual diagrams of the embankment raised by the block of this invention. These are the conceptual diagrams which show another example of the embankment raised by the block of this invention. These are the conceptual diagrams which show the state of the ground-contact surface between a dike and a block when not arrange | positioning a water absorbing polymer.

Hereinafter, the first invention will be described in more detail with reference to the drawings.
FIG. 1 is a conceptual diagram of an embankment raised by arranging blocks of the present invention on the embankment.
As shown in the figure, the block is composed of a projecting portion for raising the levee and a wing portion protruding from the bottom of the block as a fixing portion for grounding and fixing to the levee. It is arranged along the dike while being fixed to the dike surface with bolts at the wings.
Between the ground contact surface of the wing part and the embankment, water-absorbing polymer particles are placed in a bag, a net or the like.

FIG. 2 is a conceptual diagram showing another embodiment of the present invention. A pile for fixing the block in advance is provided in the dike, and the block is fixed to the pile through the wing portion of the block. Others are the same as the example shown in FIG.

FIG. 3 is a conceptual diagram showing a grounding state of a block and a dike surface when a water-absorbing polymer is not used. As shown in the figure, the ground contact surface between the block and the embankment is actually bumpy and uneven. During floods, water enters through the gaps caused by the unevenness, which triggers the formation of waterworks.
Once the water supply is formed, the water flows through this water supply, so the water supply gradually becomes larger and the lower surface of the block is swept away, leading to the collapse of the block and the breakage of the dike. Since the water-absorbing polymer absorbs moisture and expands, the water supply is blocked, and even when the lower surface of the block is swollen, it is prevented from expanding to that portion and increasing the water supply.

The block and the water-absorbing polymer can be stored in the required location, but it is preferable to store near the place where there is no time for the levee breach in the past to be fully repaired. The block is not limited to that shown in the figure, but may be a plate-like material, and the material can be appropriately selected from concrete, iron plate, FRP, etc. It is preferable to keep it. As the water-absorbing polymer, for example, an acrylic polymer can be used.

The present invention can be used in the same manner as a conventional sandbag at a place where a bank breaks or is likely to break.

1 Block 11 Wing 2 Absorbent Polymer 3 Dike 31 Pile 32 Bolt 33 Packing

Claims (1)

It consists of a block for raising along the embankment and a bag containing water-absorbing polymer particles arranged between the block and the embankment, and the block consists of a projecting part and a fixed part fixed to the embankment, The bag containing the water-absorbing polymer is inserted between the fixed part and the surface of the embankment, and the water-absorbing polymer expands to eliminate unevenness of the surface of the embankment, thereby generating water between the embankment surface and the block during flooding. An embankment breakage prevention method that stabilizes the embankment raising block by preventing the embankment.

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