岩土力学
巖土力學
암토역학
ROCK AND SOIL MECHANICS
2009年
11期
3337-3341
,共5页
非饱和膨胀土%干密度%基质吸力%渗透系数%含水率
非飽和膨脹土%榦密度%基質吸力%滲透繫數%含水率
비포화팽창토%간밀도%기질흡력%삼투계수%함수솔
unsaturated expansive soil%dry density%matric suction%permeability coefficient%water content
研究了非饱和膨胀土的两个水分迁移参数--水体积变化系数m_2~w和渗透系数k_w,得出非饱和膨胀土的水分迁移参数m_2~w和kw并非恒值,是基质吸力的函数,而基质吸力与含水率密切相关.因此,其参数大小随含水率变化而变化.此外,还明显受到干密度的影响,随干密度的不同而变化.取得了考虑干密度和含水率的水体积变化系数m_2~w、渗透系数k_w和基质吸力之间的非线性关系,为进一步研究非饱和膨胀土地基水分场变化提供基础资料.
研究瞭非飽和膨脹土的兩箇水分遷移參數--水體積變化繫數m_2~w和滲透繫數k_w,得齣非飽和膨脹土的水分遷移參數m_2~w和kw併非恆值,是基質吸力的函數,而基質吸力與含水率密切相關.因此,其參數大小隨含水率變化而變化.此外,還明顯受到榦密度的影響,隨榦密度的不同而變化.取得瞭攷慮榦密度和含水率的水體積變化繫數m_2~w、滲透繫數k_w和基質吸力之間的非線性關繫,為進一步研究非飽和膨脹土地基水分場變化提供基礎資料.
연구료비포화팽창토적량개수분천이삼수--수체적변화계수m_2~w화삼투계수k_w,득출비포화팽창토적수분천이삼수m_2~w화kw병비항치,시기질흡력적함수,이기질흡력여함수솔밀절상관.인차,기삼수대소수함수솔변화이변화.차외,환명현수도간밀도적영향,수간밀도적불동이변화.취득료고필간밀도화함수솔적수체적변화계수m_2~w、삼투계수k_w화기질흡력지간적비선성관계,위진일보연구비포화팽창토지기수분장변화제공기출자료.
Based on considering the influences of dry density and water content, the calculation of two parameters, water volume change m_2~w and permeability coefficient k_w, about moisture migration of unsaturated expansive soil is studied. It is shown that the m_2~w and k_w are not constants but functions of matric suction that is closely connected with water content. So the parameters change with the change of water content. In addition, they are influenced by dry density clearly and change with the change of it. Furthermore, it is shown that the relationship between k_w, m_2~w and matric suction is nonlinear by taking the soil density and water content into account. The results provide the fundamental data for further research on water sub-field change in unsaturated expansive soil ground.
