Method for contructing check dam or fire prevention dam using gear-type block

Abstract

A method for constructing a check dam or a fire prevention dam using a gear-type block comprises depositing a bottom mat for protecting weak ground or a mat for containing water on a prepared river bed of a river or a valley; piling a plurality of gear-type blocks such that adjacent blocks are connected together using connecting rings provided at the lateral parts of the block, and lower and upper blocks are engaged with each other by means of projections and grooves formed at the upper and lower parts of the block; and forming a block mattress on said bottom mat at upper and lower streams of the lower end of said dam structure by horizontal engagement of blocks.

Description

TECHNICAL FIELD [0001] The present invention relates generally to a method for constructing a check dam or a fire prevention dam, and more particularly to a method for constructing a check dam using a gear-type block capable of storing soil and stones and discharging water through a space between blocks to prevent a flood disaster due to rising of a river route and a water level caused by incoming and accumulation of the soil and stones from a branch river to a main river, and a method for constructing a fire prevention dam using a gear-type block capable of providing an artificial water containing facility at a remote place to supply fire prevention water for early prompt suppression of a forest fire when it occurs, and also capable of providing a spawning and inhabitation ground for animals and plants at the waterside to contribute to the preservation of an ecosystem. BACKGROUND ART [0002] Generally, a river sill is a concrete beam with a gravity section. Such a sill is mainly con...

AI Technical Summary

Benefits of technology

[0006] It is an object of the present invention to provide a method for constructing a check dam using a gear-type block capable of storing soil and stones and discharging water through a space between blocks since the check dam is constructed using the gear-type block of a prominence and depression structure to prevent a flood disaster due to rising of a river route and a water level caused by incoming and accumulation of the soil and stones from a branch river to a main river.

[0007] It is still another object of the present invention to provide a method for constructing a fire prevention dam using a gear-type block capable of providing an artificial water containing facility at a remote place to supply fire prevention water for early prompt suppression of a forest fire when it occurs, and also capable of providing a spawning and inhabitation ground for animals and plants at the waterside normal times to contribute to the preservation of an ecosystem.

[0013] Furthermore, said dam structure is constructed in the form of a pyramid such that a middle part of the structure is arranged at the level lower than either side part of the structure adjacent to either bank of the valley, which prevents any collapse due to pressure of enormous amount of water by letting a portion of the water out over the lower middle part if the volume of water kept in store is increased suddenly due to a localized torrential downpour.

Problems solved by technology

In the course of the field placing of the concrete, however, water pollution grows worse, and inhabitation environment for river fishes is destroyed.

In addition, erosion occurs severely at the lower end of the sill after the construction of the sill has been completed.

Especially, the sill may be damaged due to a flood, which requires repair or reconstruction of the sill.

Nevertheless, consideration regarding the provision of a spawning and inhabitation ground for river fishes and vegetation environment for plants at the waterside is insufficient, which does not endow the river with vital force.

Furthermore, if hydraulic properties of the river structural part, such as a sill, a check dam, or the like, and the ground connection part is not considered in case of the bank protection facility, soil and sand become washed away from the ground connection part by a flood, which leads to collapse of the banks.

This is because sand or pebbles at the riverbed adjacent to the fixed concrete structure have a very low degree of a water current tolerance, resulting in that the sand or pebbles are washed away or eroded.

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