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土的含水率是试验室经常测定的项目,但是有时遇到冻土,怎样测定其含水率呢?在冻土颗粒之间凝聚有冻结水,用通常方法测定冻土的含水率显然是不正确的。目前冻土含水率的测定方法已列入新标准《土工试验方法标准》(GB/T50123-1999)中。现将该测定方法介绍如下。首先用四分法切取层状和网状构造的冻土试样200～500g。取样时,结构均匀的土取样教量可取下限,否则取上限。将试样放入搪瓷盘中,称盘和试样的总重量,准确到0.1 g。待冻土试样融化后,将其调成糊状(土太湿时可让其自然蒸发或用吸球把多余水分吸出,但不
Soil moisture content is often measured by the laboratory project, but sometimes encountered in frozen soil, how to determine the moisture content? Frozen water condensation between the frozen particles, the usual method of determining the moisture content of frozen soil is clearly incorrect of. At present, the determination of moisture content of frozen soil has been included in the new standard “Geotechnical Test Methods Standard” (GB / T50123-1999). Now this determination method is as follows. First of all, the use of quartering cut layered and reticular structure of frozen soil samples 200 ~ 500g. Sampling, the soil structure of uniform sample sampling desirable lower limit, otherwise take the upper limit. The sample into the enamel plate, said the total weight of the plate and the sample, accurate to 0.1 g. After the frozen soil sample melts, it is transferred into a paste (soil is too wet to allow it to evaporate naturally or suck excess water out of the ball, but not