Prevention of approach slab settlement by applying non-com paction abutment backfilling method

摘要

PURPOSE: A minimizing method for the settlement of an approach slab using non-tamp bridge backing method is provided to construct easily, to reduce the cost of construction, to secure a bridge user's safety and comfort on a bridge, to extend the life of a bridge and to maintain easily by minimizing the settlement of an approach slab. CONSTITUTION: The minimizing method for the settlement of an approach slab using a non-tamp bridge backing method comprises the steps of: completing an abutment sphere(20) by placing footing concrete(10), then installing a separation shed(53) on the lowermost part of the backing part of the abutment sphere; paving backing materials(52) without tamping at the appointed interval from the abutment sphere; installing a separation shed not to mix a general banking area(56) adjacent to the backing part paved without tamping by the preinstalled non-tamp backing materials, then back-filling to the equal height to the preinstalled non-tamp backing materials; after backing to the target height repeatedly, constructing an abutment part(20) by placing an upper girder; and installing a drainage system(55) to the non-tamp backing section at need.