| 摘要 |
<p>The present invention relates to a terraced ground excavating method using a heavy weight which can support the outside of each excavated layer when the ground is excavated by layers in a terraced form to prevent inflow of earth and sand and a method for constructing an underground water treatment facility which is formed by laying porous members on a ground layer excavated in the terraced ground excavating method. The terraced ground excavating method using the heavy weight according to the present invention comprises: an excavated layer forming step (S10) of forming an excavated layer (12) by excavating the ground (10); an excavated layer supporting step (S20) of installing a heavy weight (20) on the outside of the excavated layer (12); and a repeating step (S30) of repeating the excavated layer forming step (S10) and the excavated layer supporting step (S20) relative to the inside ground in which the heavy weight (20) is installed in a case that the ground (10) must be excavated further and ending work in a case that the ground (10) is not excavated further. Moreover, the method for constructing an underground water treatment facility according to the present invention comprises: a ground excavating step (S100) carried out by the terraced ground excavating method using the heavy weight according to the present invention; and a porous member laying step (S300) of laying porous members on an excavated layer.</p> |
