That depends on soil type.
i!a.6Gq k Xg&}n7 If for real prohject, do not guess, you should use the result from test. This is very fundmental parameter for soil.
s;ivoGe} -`8pahI 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 ]