影响土样击实试验结果的试验分析  

Analysis on the influence factors in the compaction test

作　　者：王永和[1] 胡萍[1] 卿启湘[1] 

机构地区：[1]中南大学土木建筑学院,湖南长沙410075

出　　处：《铁道科学与工程学报》2006年第6期31-34,共4页Journal of Railway Science and Engineering

基　　金：国家自然科学基金资助项目(50678177);教育部高等学校博士学科点基金资助项目(20030533043)

摘　　要：简述土工试验中土样制备方法对试验结果的影响,分析土样制备过程中含水率随时间和温度的变化规律,为准确控制土样的含水率提供了依据。同时,讨论击实筒余土高度的变化对击实试验结果的影响,并提出击实过程中最后一层土按余土高度为4 mm估算,通过改变相应的击实次数来减小试验误差。此外,基于最小二乘原理和MATLAB软件,对击实试验数据进行拟合曲线处理,与手工计算相比极大地提高了工作效率,减少人为误差。The results for different methods of prepared soils were presented and the rule of the water cotent changed by time and temperature in the process of preparing soils was analysed. Theoretic basis for controlling water content was provided exactly. Meanwhile, a new method was put forward to decrease the manual error by altering the weight of water and hitting times. At last, combining the numerical analysis theory, a new method was presented, and it was used to simulate the compaction data using LMS（the least square method）and display in Matlab software. This method can be used to improve the working efficiency and reduce artificial error.

关 键 词：含水率 单位击实功 最小二乘法 曲线拟合 

分 类 号：TU447[建筑科学—岩土工程]