INTEGRAL ABUTMENT BRIDGE WITHOUT SOIL-STRUCTURE INTERACTION

摘要

The invention relates to an abutment integrated bridge having an abutment for preventing a soil-structure interaction and thermal extension and contraction using a hollow wall body and a steel column. According to the present invention, the abutment is made up by a double wall body structure of the outer wall body and the inner wall body to bear rear soil pressure, wherein a steel column is vertically installed at the gap between the inner and the outer wall body to support the upper structure. Therefore, the steel column absorbs the displacement caused by the thermal expansion and contraction of the upper structure without transmitting the displacement to the outer wall body to prevent loosening of soil in the rear side of the outer wall body bearing the rear soil pressure, thereby effectively preventing damage to a joint slab. According to the abutment integrated bridge of the present invention, the abutment (1) includes: a base unit (10); an outer wall body (11) installed vertically at the upper surface of the base unit (10) as an integral body and bearing rear soil pressure by coming in contact with soil (200); an inner wall body (12) installed vertically at the upper surface of the base unit (10) spaced apart in a longitudinal direction from the outer wall body (11) to face the outer wall body (11); and a steel column (13) installed vertically at the gap between the outer wall body (11) and the inner wall body (12) and coupled with the upper structure (2) to bear upper a surface load from the upper structure (2).