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最近,我们先后两次组织工人和技术员,对我区一九六四年至一九七三年修建的渣油路面基层,进行了一些初步调查工作。调查的方法:是一般性地测定回弹弯沉值与重点挖坑检验相结合。选择挖坑点是侧重在水文条件不良的三类潮湿地段,前后共挖坑二十七个。其中,石灰土补强基层的十个,其余都是级配碎(砾)石基层的。调查线路计十条线段,全长三百多公里,这些线路的行车量是每昼夜三百以下车次和三百至二千车次的不等。现将调查情况,列述如下:
Recently, we organized workers and technicians two times in succession to conduct some preliminary investigations into the grassroots level of the residue road construction constructed in 1964-1973 in our district. Method of investigation: the general determination of rebound deflection values and key pit test combined. The selection of pit excavation sites focused on three types of wet areas with poor hydrological conditions, and a total of 27 pit excavations were made before and after. Among them, the limestone reinforcement of the grass-roots ten, the rest are grading broken (gravel) stone base. The investigation line is composed of 10 lines with a total length of over 300 kilometers. The traffic volume of these lines is less than 300 trips per day and 300 trips and less than 300 trips per day. The investigation is as follows: