A Cantilever retaining wall is required to support a cut near a residential area. A preliminary geometry of the wall is

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A Cantilever Retaining Wall Is Required To Support A Cut Near A Residential Area A Preliminary Geometry Of The Wall Is 1 (166.09 KiB) Viewed 38 times

A Cantilever retaining wall is required to support a cut near a residential area. A preliminary geometry of the wall is shown in Figure Q2. A masonry wall 1.2 m high will sit on the top of the wall, centered. The masonry wall load (including construction loading) is 9 kN/m and the uniform loading from the homesite is 10 kPa. The backfilled soll having a unit weight of 19 kN/m² and Internal friction angle of 30° (Soll 1). Soll 2 which is in front of the wall with embedded depth of 1.25 m has a unit weight of 17.5 kN/m² and internal friction angle of 28 (Soil 1). a) Based on your judgement in the soil phase diagram and point of rotation of moment, evaluate the retaining wall stability against overturning, sliding, and bearing pressure. Take the minimum factor of safety (FOS) as 2.0 for overturning, 1.5 for sliding and 3.0 for bearing pressure by taking account the passive pressure force and ignore the friction Assume ground water table well below the base of the wall. (CO2, PO2, C4) [16 Marks] b) During rainy season, the ground water table rise to ground surface. Re-evaluate the stability of the wall (y = 9.81 kN/m³). Compare your result obtained in (1) and discuss your finding. (CO2, PO2, C4) [12 Marks] c) Based on the finding in (1) and (ii), propos a suitable wall geometry to satisfy both condition if the given geometry is unsatisfactóly. (CO3, PO2, C5) [12 Marks] 0.5 m 1.2m 1.25 m Soil 2 Original Soil .y = 17.5 kN/m³ Yaz = 19.0 kN/m² = 289 UN Soil 1 Backfill Soil y = 19.0 kN/m³ You 21.0 kN/m² Ⓒ = 30⁰ 4.25 m 0.75 m