2.2 Bearing capacity for footings on layered soils When the top layer is very soft with a small d /B ratio, consideration should be given to placing the footing deeper onto the stiff clay or to using some kind of soil improvement method. Model tests indicate that when the top layer is very soft it tends to squeeze out from beneath the base and when it is stiff it tends to punch into the lower softer layer [Meyerhf and Brown(1967)]. If quit >4c+q the soil may squeeze from beneath the footing (the "lower-bound"solution). It is suggested for -c soils to obtain modified pand c value as follows:①④ If the top layer is soft you should check for any squeezing using Eq.(a) 2.2 Bearing capacity for footings on layered soils ▪ When the top layer is very soft with a small d1 /B ratio, consideration should be given to placing the footing deeper onto the stiff clay or to using some kind of soil improvement method. ▪ Model tests indicate that when the top layer is very soft it tends to squeeze out from beneath the base and when it is stiff it tends to punch into the lower softer layer [Meyerhf and Brown (1967) ]. ▪ If qult >4c1+q the soil may squeeze from beneath the footing (the “lower-bound” solution). ▪ It is suggested for φ-c soils to obtain modified φand c value as follows: ①～④ ▪ If the top layer is soft you should check for any squeezing using Eq. (a)