ASSEMBLY-TYPE CONCRETE UNDERLYING BLOCK HAVING TRAPEZOID SHAPE

摘要

PURPOSE: An assembly-typed concrete underlying block is provided to prevent the subsidence by maintaining a certain angle between a direction of a force with a self-weight by the assembly-type concrete underlying block and a direction of the block to be moved at a regular interval when a lengthwise unequal subsidence is generated. CONSTITUTION: An assembly-type concrete underlying block is formed in a hexahedron formed a space therein and is opened both sides facing each other lengthwise. The assembling-typed concrete underlying block comprises a first underlying block(10a) formed a wide upper part, a narrow lower part of a wall(13) of a connecting portion(14), a second underlying block(10b) forming the narrow upper part and the wide lower part of the wall(13) of the connecting portion(14). The inclined connecting portion(14) of the second underlying block(10b) disperses a lengthwise shear force applied to each concrete underlying block crosswise. The force applied crosswise prevents the subsidence of the assembly-type concrete underlying block by facing to the force applied lengthwise because the assembly-type concrete underlying block is connected by continuously closing.