Abstract: Based on sensitive tests , the author makes the analysis of mathematical statistics among natural unit weight , water content , cohesion and friction angle . The results obvious the relationship of natural unit weight and water displays linear relationship , and go from strength to weak-ness along with adding pressure to the loose earth.C-φ displays distinct didisliner. ω-C-φ of high pressure is physical and mechanics parameters . When the containing water or moisture is from 10% to 13%,the pressure is highest . The increase of the pressure of unsaturated soil is the advance of pressure pammeters in nature . The conclusion in the paper has the important reference value to select the proper pammeters of earth .

Key words: the loose earth;attack times, γ-ω;C-φ;ω-C-φ, regression analysis

摘要： 通过敏感性试验,对土体的天然密度、含水量、粘结力和内摩擦角等物理力学参数进行了统计分析.分析结果显示,土体的γ-φ关系主要呈现线性关系,且随着土体压实度的提高具有相关性弱化的趋势;土体的C-φ关系具有高度的二次非线性关系,压实度越高C、φ值越大;土体的ω-C-φ是物性参数和强度参数之间关系最为密切,在10%—13%之间的最佳含水量时强度参数最高;非饱和土体强度的提高本质上仍然是强度参数提高问题.研究成果对于岩土工程参数的正确取值具有较重要的参考价值.

关键词: 松散土体, 击实次数, γ-φ关系, C-φ关系关系, ω-C-φ关系, 回归分析