SR 170: Periot Lightweight Concrete Fill Retaining Wall (1 Images)
Design of a light-weight concrete fill (LCF) retaining wall for a side hill roadway widening. Railroad tracks were within 20-ft of the toe of the existing slope, with a Southwest Gas Pipeline between the slope and the tracks. Additionally, the subsurface conditions consisted of soft, saturated, clayey soils. Settlements from surcharges needed to be minimized to avoid adversely affecting the pipeline or the railroad. Instead of ground improvement, a decision was made to use LCF with a unit weight of 30 pcf to mitigate adverse settlement.
