0009 6000 7500 PAD FOOTING & GROUND BEAM PLAN Circular Column Stump Ground Beam Pad footing GROUND LEVEL 099 FOOTING SCHEDULE TYPE BxLxH F3 1500 x 1500 x 650 B or L COLUMN TYPICAL FOOTING DETAIL 150MM WIDTHX 350MM THK GROUND BEAM 250MM DIAMETER CIRCULAR COLUMN STUMP PAD FOOTING TYPE F3 50MM THK LEAN CONC.

Prove the following mathematical relationship with the drawing if necessary

An excavation is rapidly made on site as depicted in the Figure below. The soil wedge above the critical slip surface is divided into thirteen slices. Based on the ordinary method of slices, calculate the ratio (R/S) between the Resisting Force (R) and the Driving Force (S) for slice #3, shortly after the excavation is completed. (Acceptable tolerance = 4%). The geometry of slice #3 and the soil properties are provided in the tables below. The height of water at the middle of the slice is hw = 3.0 m. Note that the total weight of the slice is equal to the weight of the saturated soil below the water table plus the weight of the moist soil above the water table. Hint: the weight of slice #3 is 495 kN