线性加荷情况下非饱和土层一维固结特性分析

基于Fredlund非饱和土一维固结理论, 得到了线弹性和黏弹性两种地基在线性加荷情况下, 顶面透水透气、底面不透水不透气的单层非饱和土一维固结超孔隙水压力、超孔隙气压力和沉降的半解析解. 通过典型算例, 分析了不同水、气渗透系数比以及不同土层深度下超孔隙水压力、超孔隙气压力和固结度随时间的变化规律，并对线弹性和黏弹性两种地基的计算结果进行了比较分析. 得到的结论对于非饱和土固结特性的研究及线性加荷下的固结工程具有一定的参考价值.

Analysis of one-dimensional consolidation characteristics in unsaturated soil under line loads

Semi-analytical solutions of excess pore-air pressure, excess pore-water pressure and degree of consolidation are obtained based on the Fredlund’s one-dimensional consolidation theory for unsaturated soil. The research object is a layer of unsaturated soil whose top surface is penetrable, and the bottom surface impenetrable to water and air. With a typical example, rules of excess pore-air pressure, excess pore-water pressure and degree of consolidation changing with time in different soil depth and ratio of permeability coefficient of air and water are analyzed. The linear elastic and viscoelastic situations are calculated, analyzed and compared. The conclusions are useful in the research of unsaturated soil consolidation characteristics and practical engineering problems about consolidation under line loads.