摘要
目前,运用激光衍射粒度分析仪检测土壤质地十分普遍,该仪器可用干法、湿法两种方法进行检测。为判别两种方法检测结果的一致性,本文采用干法和湿法分别对耀州区瑶曲镇的14个样品进行检测,每个样品重复测3次取其平均值。结果显示:所有样品干法较湿法检测粘粒(<2μm)含量均偏低,粉粒(2~50μm)含量各有高低,砂粒(50~2000μm)含量均偏高。干法和湿法检测的粒径分布呈极显著相关,决定系数R2为0.869,因此在本项目区内可借助该模型,运用干法检测模拟湿法检测粒径分布范围,并判断机械组成。
At present,it is very common to use laser diffraction particle size analyzer to detect soil texture.The instrument can be tested by dry method and wet method.In order to determine the consistency of the test results by the above two methods,14 samples from Yaoqu town,yaozhou district were tested by dry method and wet method respectively,and each sample was tested three times to take the average value.The results showed that the content of clay(<2μm)was lower,and the content of powder(2~50μm)is high partly and low partly,and the content of sand(50~2000μm)was higher by dry method than wet method.The particle size distribution of dry method and wet method showed extremely significant correlation,and the determination coefficient R2 is 0.869.Therefore,in this project area,dry detection method can be used to simulate wet detection method to test the particle size distribution range and judge the mechanical composition.
作者
魏静
杨珂
董起广
WEI Jing;YANG Ke;DONG Qiguang(Institute of Land Engineering and Technology,Shaanxi Land Engineering Construction Group Co.,Ltd.,Xi’an 710075,China;Key Laboratory of Degraded and Unused Land Consolidation Engineering,the Ministry of Natural Resources,Xi’an 710021,China;Shaanxi Land Consolidation Engineering Technology Research Center,Xi’an 710075,China)
基金
国家重点研发计划项目(2017YFC0504705)
陕西省土地工程建设集团内部科研项目“建筑垃圾再生微粉粒对重黏土物理特性的改良效应研究”(DJNY2019-27)
陕西省土地工程建设集团内部科研项目“泥质页岩风化物对新增耕地稳定性的影响研究”(DJNY2018-19).
关键词
干法
湿法
粒径分布
机械组成
dry method
wet method
particle size distribution
mechanical components
