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问题的提出:铁道部颁《静力触探使用技术暂行规定》(以下简称《规定》)中,土层分类是用测得的土层平均端阻(?)和摩阻比R_f为座标的分类图将土层划分为三类,即:砂;粘砂土;软土、砂粘土、粘土,而对第三类中的三种土则不做进一步划分。《暂规》颁布后经过四年的使用,笔者认为关于土的分类尚有如下几个问题待进一步研究解决。1.现行土分类图的划分界限缺少数理统计依据,选用触探参数做为土分类的指标应做三个参数和两个参数的比较;
The question is raised: The Ministry of Railways issues the Interim Provisions for the Use of Static Concussion Testing Technology (hereinafter referred to as the “Regulations”). The soil classification classifies the measured average soil resistance (?) and friction ratio R_f as coordinates. The classification map divides the soil layer into three categories, namely: sand; clay sand; soft soil, sand clay, and clay; and the three soils in the third category are not further divided. After the promulgation of the “temporary regulations,” after four years of use, the author believes that there are several issues concerning the classification of soil that need further study and resolution. 1. There is a lack of mathematical statistical basis for the division boundaries of current soil classification maps, and the use of penetration parameters as the soil classification index should be compared with three parameters and two parameters;