In order to study the influence of water pressure on incipient velocity of undisturbed clay, we carried out test on the incipient velocity by using a closed rectangular pipe which could provide different water pressures. Results show that incipient frictional velocity of undisturbed clay in the presence of 4.35 m water column height is 2.52-3.06 times that under 0.35 m height. In other words, incipient velocity of undisturbed clay increases with the increasing of water pressure. Besides, water column height, grain gradation and compactness of undisturbed clay are also main factors affecting the incipient frictional velocity.The experimental results can provide reference for further studies on incipient velocity of cohesive undisturbed soil.
Key words
water pressure /
undisturbed clay /
incipient velocity /
gradation of grain /
dry density
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References
[1] 窦国仁.论泥沙起动流速[J]. 水利学报,1960,(4):46-62.
[2]张瑞瑾. 河流动力学[M].北京:中国工业出版社,1960.
[3] 韩其为,何明民. 泥沙起动规律及起动流速[M]. 北京:科学出版社,1999:38-41.
[4] 钱 宁,万兆惠. 泥沙运动力学[M]. 北京:科学出版社,2003.
[5] 洪大林. 粘性原状土冲刷特性研究[D]. 南京:河海大学,2005.
[6] 洪大林,缪国斌,申 霞,等. 黏性原状土起动流速试验研究[J]. 人民长江,2012,43(2):39-42.
[7] 窦国仁. 再论泥沙起动流速[J]. 泥沙研究, 1999,(6):1-9.
[8] 张书农. 河流动力学[M]. 北京:水利电力出版社,1988.
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