[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：À®bqrkG÷Õsbbs.3c3t.comu®’Iá:;1æ
荷载百分表读数             贯入百分表读数À®bqrkG÷Õsbbs.3c3t.comu®’Iá:;1æ
         0                               30     À®bqrkG÷Õsbbs.3c3t.comu®’Iá:;1æ
         0                               50À®bqrkG÷Õsbbs.3c3t.comu®’Iá:;1æ
         0                               100À®bqrkG÷Õsbbs.3c3t.comu®’Iá:;1æ
         1                               150À®bqrkG÷Õsbbs.3c3t.comu®’Iá:;1æ
         1                                200À®bqrkG÷Õsbbs.3c3t.comu®’Iá:;1æ
         1                                250À®bqrkG÷Õsbbs.3c3t.comu®’Iá:;1æ
         2                                300À®bqrkG÷Õsbbs.3c3t.comu®’Iá:;1æ
         3                                350À®bqrkG÷Õsbbs.3c3t.comu®’Iá:;1æ
         4                                400À®bqrkG÷Õsbbs.3c3t.comu®’Iá:;1æ
         6                                450À®bqrkG÷Õsbbs.3c3t.comu®’Iá:;1æ
         8                                 500À®bqrkG÷Õsbbs.3c3t.comu®’Iá:;1æ
        10                                 550À®bqrkG÷Õsbbs.3c3t.comu®’Iá:;1æ
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À®bqrkG÷Õsbbs.3c3t.comu®’Iá:;1æ