Analysis of Slope Stability & Design of Retaining Structure & Foundation for Multi-story Building2011-2012Graduation Project Seminar

Analysis of Slope StabilityDesign of Retaining StructureDesign of Foundation for Multi-Story Building

AL-Iskan road at AL-Junaid district.

Surveying Plan

Longitudinal Cross Section for the site

Slope stability is the slope of the soil that make it stable.

There are several method to analysis slope stability:Infinite Slope.Logarithmic Spiral.Spencer.Morgenstern & Price.

The project is dealing with slope of the soil by using GeoStudio software.This software is based on Morgenstern & Price method.It gives you a simple analysis for slope stability and critical slip for the soil.

Model: Mohr-CoulombUnit Weight: 20 kN/mCohesion: zero kPaPhi: 20 Bedrock

Critical slip at radius = .782

Grouting and Injection.Injection of pile.Cement grout.Vegetation.Retaining Structure.

These methods increase the resistance and shear strength of the soil.

Retaining Wall.Boulders Wall.

Retaining structure are designed using prokon and Geo5 software.

Soil propertiesBearing capacity = 250 KN/m=20, fc=28 MPa, Fy=420 MPa, gsoil =20 KN/m2Surcharge = 15 KN/m2

Safety factor against overall sliding = Fr/Fh = 1.519 Safety factor against overturning = Mr /Mo = 5.072Over turning(manually)= 3

Safety factor against sliding = 1.5Safety factor against overturning = 2.5

(Seismic Design )

Properties of bouldersUnit weight=25KN/mAngle of internal friction=30Cohesion=0

Using AllPile software to design pile foundation.design for two diameter (60, 80) cm and 3lengths (10, 12, 15) m.Soil properties:C=40KN/m , Phi=15 , Unit weight=18KN/m

Columns (80*20)Service Load=2158KN

D(cm)L(m)# of PilesAllowable Capacity(KN)601062530.63601263117.01601542623.56801042400.4801232204.76801532861.91

Columns (185*20)Service Load = 655 KN

D(cm)L(m)# of PilesAllowable Capacity(KN)60102843.5460122103960151655.89

801021200.280121734.9280151953.97

Design pile footing for column (20*80 cm).Diameter= 80 cm fc=400 kg/cm =32 MPa L=12 m #of piles = 4 pilesAllowable capacity=2940 KN pult. =2836 KN pserv. =2157 KN

Fu=2836/4=709 KN

H=600mm

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