提高液、塑限试验效率的方法研究

Research on the Method of Liquid-limit and Plastic-limit Test Efficiency

研究目的:液、塑限试验是土工试验中一项非常重要的试验项目。在低含水率高液限黏性土的液、塑限试验过程中,土样浸泡时间较长,试验周期较长。现在需要寻找一种方法,解决上述试验中的问题,来适应当前试验数量越来越多,工期越来越紧的状况。研究方法:在分析黏性土的结构特点和液、塑限试验特点的基础上,提出了一种使用刨削器的改进方法,并对低含水率高液限黏性土进行了大量的对比试验。研究结果:对试验部分所花的时间及试验结果进行统计分析,得出该方法在保证试验数据一致的情况下,大大缩短了土样浸泡时间、调拌时间,缩短了试验周期。研究结论:使用刨削器可以提高低含水率高液限土液、塑限试验的效率,该方法经济实用,同时可以降低试验工作人员的劳动强度。

Research purposes： The liquid -limit ＆ plastic -limit test is a very important item in soil test. In the liquid - limit ＆ plastic - limit test using the soil with lower containing water rate higher liquid - limit, the sample of soil has to marinate longer time. Now we need to find a new method to solve the above questions, to adapt the current test quantities more and more, and the time limit for a project more and more tight condition. Research methods：Analyzed the soil＇s structure characteristic and the liquid -limit ＆ plastic -limit test characteristic, we propose to use chipper to make the improvement. And we also do considerable contrast tests for the soil with lower containing water rate higher liquid -limit. Research results：Through the statistical contrast of the testing steps time and test results, we can see that the above method greatly shortens soil marinated time, mixture time, and then shortens the period of the test to ensure test datum all the same. Research conclusions：Use the chipper, we can improve the efficiency of liquid - limit ＆ plastic - limit test that with lower containing water rate higher liquid - limit soil. And the method is very economic and useful. In the meantime, this method can debase the operators physical force.