| 摘要 |
<p>PURPOSE:To cope with the enlargement of the spherical tank by embedding PC steel material in a hollow body made of concrete and spreading the sheet metal onto the inner surface of the spherical body of the spherical tank. CONSTITUTION:A spherical body 2 made of the prestressed concrete is installed in place, and a manhole frame 3 is provided in both poles of the spherical body 2 and a rib 4 in its equator. The rib 4 is connected to the manhole frame 3, and the PC steel material 5a embedded in the spherical body 2 in the longitudinal direction is tensioned to anchor its respective ends to the manhole frame 3 and rib 4. A pair of ribs 7 is provided in the longitudinal direction, and the PC material 5b in the latitudinal direction is tensioned to anchor its ends to the ribs 7. A prestress is introduced into the spherical body 2 in this manner. The metal sheet 8 is spread on the inner surface of the spherical body 2 to maintain the airtightness of the tank.</p> |
