A Physical Model for Sloping Capillary Barriers
A Physical Model for Sloping Capillary Barriers
复制标题
倾斜毛细管屏障的物理模型
DOI：
10.1520/gtj11431
复制
发表时间：
2004
影响因子：
1.6
通讯作者：
D. Fredlund
中科院分区：
文献类型：
--
作者：
D. Tami;H. Rahardjo;E. Leong;D. Fredlund
建立了一个物理毛细屏障模型，用于研究毛细屏障用于边坡加固的机理和效果。在一个专门设计的装置内建立了一个倾斜的两层毛细屏障模型，该模型由相对较粗的土层上的相对细小的土层组成。通过降雨模拟器模拟了代表热带气候条件的不同强度和持续时间的降雨。实验中使用了各种仪器，包括孔压测量的张力计、水分测量的时间域反射仪(TDR)、磁流量计和水平衡测量的电子秤。由不同类型仪器获得的结果是一致的。实验结果表明，毛管屏障在高降雨率影响下的性能主要取决于毛管屏障中相对较细的土壤的蓄水能力。
A physical capillary barrier model has been developed to study the mechanism and the effectiveness of a capillary barrier for slope stabilization purposes. A sloping two-layer capillary barrier model consisting of a relatively fine soil layer over a relatively coarse soil layer was constructed inside a specially designed apparatus. Simulated rainfalls of different intensities and durations representative of tropical climatic conditions were applied through a rainfall simulator. Various instruments consisting of tensiometers for pore-water pressure measurement, time domain reflectometry (TDR) for water content measurement, magnetic flow meter and electronic weight balances for water balance measurements were used in the experiment. The results obtained from various types of instrumentation were in good agreement. The experimental results show that the performance of the capillary barrier under the influence of a high precipitation rate is primarily governed by the storage capacity of the relatively fine soil of the capillary barrier.