摘要
通过土颗粒成拱结构的模拟试验和细粒土结构稳定性反滤试验,对土颗粒成拱结构的稳定情况及满足保土条件下滤层孔径的上限进行分析,对反滤系统的极限保土状态进行了研究。玻璃球和不同级配砾石在不同开孔形状、大小及开孔数量的滤层上进行的系列模拟试验以及粉土的反滤试验研究表明,由于被保护颗粒成拱作用,在相对较大孔径滤层上的土体也能保持较好的结构稳定性。研究结果可为反滤设计中使用较大孔径的土工织物滤层以减少淤堵提供参考依据。
By presenting the simulated arching formation tests and the structure stability tests of fine particle soil, the stability of the soil particle arching formation and the upper limit of the filtration opening in soil retention are analyzed and the state of fully-soil-eroding-away of the soil-geotextile filtration system is studied. The soil particles are represented by glass spheres and different graded gravel with different shape, size and number of the filtration opening. The filtration test of the fine particle soil is presented. The results show that the structure of the soil sample will keep stable enough with bigger filtration pore size because of the arching formation of the retained particles. The results provide references in using bigger pore size geotextile to void clogging in filtration design.
出处
《水力发电学报》
EI
CSCD
北大核心
2006年第4期117-121,共5页
Journal of Hydroelectric Engineering
基金
国家自然科学基金资助项目50479005
中国博士后科学基金2005038041
关键词
建筑材料
结构稳定性
模拟试验
土工织物
反滤
淤堵
保土状态
最大稳定孔径
Architectural material
structure stability
simulating test
geotextiles
filtration
clogging
state of soil-retained
maximal stable opening size
