Answer Happy

Q4 A reinforced cantilevered wall as shown in Figure Q4 is proposed to hold back a 4 m high sandy soil bank. The surface of the soil behind the proposed wall is level. Given the following data, (a) (b) Characteristic strength of concrete, fe Characteristic strength of steel reinforcement, f Unit weight of reinforced concrete Concrete cover Safe bearing pressure, q Concrete cover Bar diameter Cohesion, c Friction with concrete coefficient, u Moment Permanent action due to wall and soil Permanent action due to soil active pressure Variable action due to wall and soil Variable action due to surcharge active pressure Vertical load, Vi Permanent action Variable action Horizontal load, He Permanent action Variable action *** Design the main reinforcement in the wall and base 30 MPa 500 MPa 25 kN/m³ 50 mm 300 kN/m² 45 mm 16 mm 0 0.45 531 kNm 133 kNm 43 kNm 38 kNm 278 kN 20 KN 76 KN 14 KN Analysis the stability of the overturning, sliding and settlement I (10 marks) (15 marks)
4200 700 400 700 1 400 -250 2100 FIGURE Q4 All units in mm 2.7kN/m² 29.16 kN/m² 31.32 kN/m² Active soil pressure