Tiêu đề HPGE 9 Solutions.pdf ✅

09 Geotechnical Engineering: Lateral Earth Pressure Solutions SITUATION 1. A retaining wall 5.8 m high supports soil that has the following properties: Unit weight = 17.3 kN/m3 Angle of internal friction = 26 ̊ Cohesion = 14.5 kPa ▣ 1. Calculate the normal pressure acting at the back of the wall assuming no tensile crack occurs in the soil. [SOLUTION] Compute for the active earth pressure coefficient. ka = 1 − sinφ 1 + sinφ ka = 1 − sin 26° 1 + sin 26° ka = 0.39 Compute for the normal force P = 1 2 kaγH 2 − 2√kacH P = 1 2 (0.39) (17.3 kN m3 ) (5.8 m) 2 − 2√0.39(14.5 kPa)(5.8 m) P = 8.52 kN ▣ 2. Find the location of the tensile crack measured from the surface of horizontal backfill. [SOLUTION] z0 = 2c γ√ka z0 = 2(14.5 kPa) (17.3 kN m3 ) √0.39 z0 = 2.68 m ▣ 3. Determine the pressure acting on the wall if tensile crack occurs in the soil.