That depends on soil type.
^P~%^?( &'N{v@Oi) If for real prohject, do not guess, you should use the result from test. This is very fundmental parameter for soil.
PNd]Xmv) 4!d&Zc>C4 If you just input some number for prastice, you can pick number from your Geotechnical book.
[ 此贴被mano在2007-09-02 16:58重新编辑 ]