CAJ | 학술논문

借鉴结晶矿物学/粉体力学与工程中的配位数概念,基于Smith试验公式、Fisher经验公式和Young-Laplace公式,建立含水量、干密度或孔隙比等非饱和土的宏观状态量与两土颗粒之间水环体积、饱和角等微观状态变量之间的对应关系,从理论上推导并给出基质吸力的定量计算公式.计算结果表明:非饱和土基质吸力随含水量的增大而单调减小,二者表现为非线性关系;基质吸力与干密度或孔隙比表现为良好的线性关系,但在低含水量段,基质吸力随干密度的增大而增加的趋势明显,而在高含水量段,基质吸力则基本保持不变.计算结果与已有的试验结果吻合较好.
차감결정광물학/분체역학여공정중적배위수개념,기우Smith시험공식、Fisher경험공식화Young-Laplace공식,건립함수량、간밀도혹공극비등비포화토적굉관상태량여량토과립지간수배체적、포화각등미관상태변량지간적대응관계,종이론상추도병급출기질흡력적정량계산공식.계산결과표명:비포화토기질흡력수함수량적증대이단조감소,이자표현위비선성관계;기질흡력여간밀도혹공극비표현위량호적선성관계,단재저함수량단,기질흡력수간밀도적증대이증가적추세명현,이재고함수량단,기질흡력칙기본보지불변.계산결과여이유적시험결과문합교호.
Referring to the concept of coordination number in crystallography and mineralogical science and powder material science and engineering,based on the formulas of Smith,Fisher and Young-Laplace,the corresponding relationship between macro variables such as water content,dry density,void ratio and micro variables such as saturation angle,volume between two soil particles,the quantitative calculation formula of matric suction is deduced. Calculation results show that:(1) Matric suction of unsaturated soil decreases with the increasing water content nonlinearly. (2) There is a linear correlation between matric suction and dry density,as well as void ratio. Matric suction increases with the increasing dry density at low water content while keeps no changes at high water content. The calculation result matches existing experimental results.