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在制定限制或防止路基表面部分过温的措施时,重要的是要知道使其过温的一些原因。但是,要确定水分进入路基的主要来源,关键的问题在于进行专门试验。因此,莫斯科公路学院为了研究水从路面渗透的可能,曾采用了放射性同位素的方法。全苏公路研究院列宁格勒分院,为了研究路基土壤含水量状态,采用了放射同位素法——中子温度计和γ射线密度计。这里值得注意的是,利用这些方法在土壤的同一个点(一般沿路基深度20厘米)上进行任何次测量,实际上没有任何差别,这就是放射性同位素观测土壤含水分状态的优点。此方法切实可行,而测量的结果很可靠。
When developing measures to limit or prevent over-temperature on the subgrade surface, it is important to know some of the causes for overheating. However, to determine the main source of moisture into the embankment, the key issue is to conduct a specialized experiment. Therefore, in order to study the possibility of infiltration of water from the road, the Moscow Institute of Highway adopted the radioisotope method. All-Su Road Research Institute Leningrad branch, in order to study subgrade soil moisture status, the use of radioisotope method - neutron thermometer and gamma ray density meter. It is worth noting here that there is virtually no difference between these measurements at the same point in the soil (usually 20 cm along the subgrade), which is the advantage of the radioisotope in observing the state of soil moisture. This method is feasible, and the measurement results are reliable.