Greenalleycat
Structural
I am assessing the liquefaction susceptibility of several sites based off CPT data. The edge of the site has a drainage swale approximately 2.75m from top to bottom and evenly battered over about 8.2m horizontally (i.e. ~18 degree flat slope). The groundwater table seems to hover around 2.5-3m in my testing on the site, but I have adopted 2m in my analysis as other testing nearby found a shallower watertable. CLiq is giving me moderate vertical settlements of ~35mm - seems reasonable. However, it is predicting lateral displacements of 600mm to 1200mm across my various sites. I have attached my inputs and one of the lateral displacement profiles as a reference.
I find it extremely difficult to believe that there will be over 1.2m of displacement (in some instances). Does anyone have experience with this and can offer some insight as to how to interpret this data? I have done a lot of reading on the topic and it seems widely accepted that lateral stretch is a bit of a guesstimate and that these calculations can have significant error of 2x or more, but that still doesn't really help. Even a 3x error leaves me with estimates of 200mm to 400mm.
I find it extremely difficult to believe that there will be over 1.2m of displacement (in some instances). Does anyone have experience with this and can offer some insight as to how to interpret this data? I have done a lot of reading on the topic and it seems widely accepted that lateral stretch is a bit of a guesstimate and that these calculations can have significant error of 2x or more, but that still doesn't really help. Even a 3x error leaves me with estimates of 200mm to 400mm.