2020 Volume 76 Issue 3 Pages 320-330
Product extension of the precast L-type retaining wall is short and the products are not rigidly connected. So it receives lateral pressures directly from wheel loads each time vehicle passes. The lateral pressures increase as traveling position of vehicle approaches the wall. In addition, as the retaining wall height decreases, the ratio of lateral pressures due to wheel loads to the total earth pressures increase. In this study, loading was repeatedly performed on the backfill material packed in a box made of lightweight section steel, and the lateral pressures acting on the wall of the box were measured. The measured lateral pressures were represented by an approximate equation obtained by multiplying the Boussinesq equation by a coefficient. The shear force and bending moment acting on the stem of the precast L-type retaining wall were calculated by using the approximate equation. As a result, it was found that the bending moment acting on the stem under repeated loading due to the vehicle is bigger than a uniform load of 10 kN/m2 in some case.
