[公路] CBR 试验一个小问题 [复制链接]

CBR试验中45N如何确定？是否根据测力环Y=AX+B计算，如是的话，那数值很小该如何控制？我做试验时测得数据如下，请版主帮我看一下：I˜sjÔ'ƒŸbbs.3c3t.comð=°Æ],–vª
荷载百分表读数             贯入百分表读数I˜sjÔ'ƒŸbbs.3c3t.comð=°Æ],–vª
         0                               30     I˜sjÔ'ƒŸbbs.3c3t.comð=°Æ],–vª
         0                               50I˜sjÔ'ƒŸbbs.3c3t.comð=°Æ],–vª
         0                               100I˜sjÔ'ƒŸbbs.3c3t.comð=°Æ],–vª
         1                               150I˜sjÔ'ƒŸbbs.3c3t.comð=°Æ],–vª
         1                                200I˜sjÔ'ƒŸbbs.3c3t.comð=°Æ],–vª
         1                                250I˜sjÔ'ƒŸbbs.3c3t.comð=°Æ],–vª
         2                                300I˜sjÔ'ƒŸbbs.3c3t.comð=°Æ],–vª
         3                                350I˜sjÔ'ƒŸbbs.3c3t.comð=°Æ],–vª
         4                                400I˜sjÔ'ƒŸbbs.3c3t.comð=°Æ],–vª
         6                                450I˜sjÔ'ƒŸbbs.3c3t.comð=°Æ],–vª
         8                                 500I˜sjÔ'ƒŸbbs.3c3t.comð=°Æ],–vª
        10                                 550I˜sjÔ'ƒŸbbs.3c3t.comð=°Æ],–vª
该土为粉土质砂                这样的话该土的CBR值很低，不知是什么原因造成的，请版主多多指导，谢谢I˜sjÔ'ƒŸbbs.3c3t.comð=°Æ],–vª