| 摘要 |
A floor is supported above an area of expansive soil by foam blocks defining an elongated channel along a top surface of the foam block. A plurality of supports attached to a bottom surface of each foam block positions the bottom surface of the foam block a predetermined distance above the soil and on a level substantially equal to the level of a flat surface defined by opposing foundation walls. The foam blocks are aligned between the opposing foundation walls and the elongated channels are filled with concrete to form concrete joists extending between the flat surfaces of the opposing foundation walls. The floor is installed on top of the concrete joists and the foam blocks while a void is effectively maintained between the concrete joists and the expansive soil. The supports may be made from a crushable foam material to increase the effective size of the void. Additionally, the supports are detachable from the bottom surface of the foam blocks to further increase the effective size of the void between the concrete joists and the soil. The channels are preferably trapezoidal in shape to prevent downward movement of the foam blocks relative to the concrete joists.
|
