| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a retaining wall formation in which, even when concrete is installed only at one side of a rear side and a front side of the retaining wall formation, concrete can exist also at the other side of the rear side and the front side of the retaining wall formation. <P>SOLUTION: A retaining wall formation comprises a wall part. The wall part including both principal surfaces of a front face and a rear face is installed to rise from an installation surface, thereafter, unhardened concrete is installed on the installation surface, and a lower portion of the wall part is covered with unhardened concrete. By hardening the concrete, the hardened concrete is abutted and fixed to the front face and the rear face of the lower portion, thereby forming a retaining wall inside of a tunnel. A lower edge or a lower surface of the wall part includes an adjacent portion forming a lowest end of the wall part confronted to a reference surface which is a virtual plane, along a direction in which the wall part is continued, and a separate part formed to be notched upward in such a manner that the adjacent part exists at one side or both sides. <P>COPYRIGHT: (C)2013,JPO&INPIT |
