| 摘要 |
PROBLEM TO BE SOLVED: To solve the point at issue that the quantity of soil excavated in a cut section is often increased to quantity more than required when the earth- pressure resistance force of a required retaining wall intends to ensure because a conventional trapezoidal gravity-type retaining wall is constructed only in two forms (postures) that each internal and external side face is turned over. SOLUTION: The finally built retaining wall 1 is constituted by staking a plurality of split skeletons 21-25, which are composed of concrete molded forms having each shape vertically divided into the plurality and molded so that each side face (a), (b) opposed in the depth direction are formed at mutually different angles to a base, while the internal side face 13 of the built retaining wall 1 is formed so that the upper-side internal side face 13b is bent to the outside to the lower-side internal side face 13a, using a fixed intermediate height position within a retaining wall height range as a border, thus reducing the quantity of soil excavated for the cut section 4, ensuring the earth-pressure resistance force of the required retaining wall.
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