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1.1*1 Bearing pressureV.4Appendix 4.13.1 - P»1 ,(Ifovember, 1983) -DESIGN OP ABUTMENTS AND PILED IDUHDAOJIONSThe distribution of pressure on an abutment baseas shown in Figure 4*13*2 is given byf . £ + M t " A± Zwheref » bearing pressureA » area of basem d X 1 for unit lengthZ m section modulus» d £ /6 for unit length¥ m total vertical loade M eccentricity of W fromcentre line of baseTo avoid uplift e should be limited to d/6.1.2 SlidingThe following relation should be satisfied forthe ultimate limit state for the situation shown inFigure 4*13«3wherejiM > 3H/2\i m coefficient of friction t with values betweenconcrete andclay of 0.2sand of 0*4gravel of 0.4H m sum of horizontal design loadsW m sum of vertical design loadsA partial load factor of 1 should be applied to the nominalloads to obtain the design loada

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