Week 4 Challenge

Aim - For the bridge to be designed for the following data, the abutṁent wall is 5ṁ length and the cross section is shown in figure. The Backfill soil is 7ṁ height. The Ground level is at 3ṁ above top of foundation level. Assuṁe water table at GL. Calculate the Earthpressure acting on the abutṁent wall and apply on the staadpro.

Total Weight of RCC structure -

1) Raft Weight as per design - 10*1*5*2.5 = 125 Kn/m2

2) Abutment wall weight as per design data - 5*7.5*0.15*2.5 = 14.06 Kn/m2

Total Dead load of structure - 125+14.06 = 129.06 Kn/m2

Calculate Earth Pressure as per given Data

3) Pressure at Original ground level = 0.35* (19-10)*3 = coefficent of submerged soil * unit wt of submerged soil * ht = 9.45 kn/m2

4) Pressure at Backfilled soil = 0.5*(19-10)*7 = 31.5 kn/m2

Calculate Soil Load on Foundation

5) Soil load on Foundation at OGL = 9*3 = 27 kn/m2

6) Backfilled soil load on Foundation = 9*7 = 63 Kn/m2

Uplift Pressure as per Given Data

7) Uplift Pressure on Foundation = 10*3 = 30Kn/m2

Create Model in Stadd Pro as per given data

Assigning properties to the structure

3D modeling Diagram as Given Below

Loading Given to the structure of retaining wall

Earth Pressure

Soil loading on Foundation

Run Analysis of given Programme

Result as given Below

Displacement result

Plate stress Result