<；P>；PROBLEM TO BE SOLVED: To provide a method for supplying earth and sand in reducing the consumption of cement and without affecting the environment. <；P>；SOLUTION: The method includes a holding process wherein earth and sand D is held in a holding part 2 of a hardened body A for supplying earth and sand, an installing process wherein the hardened body for supplying earth and sand holding the earth and sand D by the holding process is installed at the waterfront of a river or the sea or below the water surface thereof, a decaying process wherein a spontaneous decay-type hardened body provided for the hardened body for supplying earth and sand installed by the installing process decays until it becomes earth and sand shape by the water of the river or the sea, and an immersing process wherein the spontaneous decay-type hardened body of earth and sand shape having decayed by the decaying process immerses in the river or the sea along with the earth and sand D. <；P>；COPYRIGHT: (C)2010,JPO&INPIT
