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earth pressure & slide resistance for the DSM gravity type wall

earth pressure & slide resistance for the DSM gravity type wall

earth pressure & slide resistance for the DSM gravity type wall

(OP)
I am involved in the design of a ground improvement behind a quay wall using the deep soil mixing DSM), which is also called Deep Mixing Method (DMM) in Japan. The DSM block behind the quay wall would  reduce the earth pressure on the wall. The DSM block is to be founded on stiff to very stiff clay with N> 19, and will have a height of about 20m. Behind the block the clay is very soft to soft becoming firm to stiff with depth. That clay is going to be surcharged by 13m of sand fill, half of which is for land reclamation, and the other half for surcharging.  I have the following querries: 1- Given the initial high excess pore water pressure in the clay at the begining of surcharging(du=200 kPa), would the total stress analysis be suitable to assess the earth pressure on this DSM block, despite the initial high pore water pressures in the clay? if not, what else to use and what are the references/publications that support these other choices? 2- Are there design manuals/ design guides, or even previous case histories that recommend the anti slide soil adhesion on the DSM block bottom? I would be very grateful if you could send me replies to these queries or information about useful publications that address them.   

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