STRUCTURE OF VERTICAL SHAFT AND ITS CONSTRUCTION METHOD

PURPOSE:To form a vertical shaft with a batholith of a large area, a small thickness, and a small size, by forming a side wall and a batholith in the ground, fixing the upper ends of anchor members to the batholith, and fixing the lower ends of the anchore members to the ground. CONSTITUTION:The ground is excavated while filling a stabilizing liquid to form a groove hole in the ground, reinforcements are applied to the groove hole, and a concrete is placed to form a side wall 12. Then, plural holes passing through a pillar form ground 19 partitioned by the side wall 12 and extending to the lower ground 18 are formed, and anchor members 16 are inserted to the holes. Then, in the parts of the anchor members 16 expect the upper ends 16a, a fixing material 32 such as a concrete is poured in. And the ground is excavated until the upper ends 16a are exposed from the holes while filling a stabilizing liquid. Furthermore, a concrete is placed on the bottom surface of the excavated holes, the upper ends 16a are buried with the concrete to form the batholith 14, and a vertical shaft is formed.