院报 ›› 2017, Vol. 34 ›› Issue (4): 5-8.DOI: 10.11988/ckyyb.20160124

• 江湖泥沙与治理 • 上一篇    下一篇

水压力对黏性原状土起动流速影响的试验研究

范力阳1,陈国平1,马洪蛟1,李庆银2   

  1. 1.河海大学 港口海岸与近海工程学院,南京 210098;
    2.黄河水利委员会 山东水文水资源局,济南 250100
  • 收稿日期:2016-02-17 出版日期:2017-04-01 发布日期:2017-04-10
  • 作者简介:范力阳(1991-),男,湖南常德人,硕士研究生,主要从事河口海岸水动力与泥沙运动研究,(电话)13776628420(电子信箱)fly_hhu@163.com。

Influence of Water Pressure on Incipient Velocityof Cohesive Undisturbed Soil

FAN Li-yang1, CHEN Guo-ping1, MA Hong-jiao1, LI Qing-yin2   

  1. 1.College of Harbor, Costal and Offshore Engineering, Hohai University, Nanjing 210098, China;
    2.Shandong Hydrology and Water Resources Bureau, Yellow River Conservancy Commission,Jinan 250100, China
  • Received:2016-02-17 Online:2017-04-01 Published:2017-04-10

摘要: 为探究水压力对黏性原状土起动的影响,在一套能模拟不同大小的水压力的封闭管道试验系统中进行了黏性原状土起动试验。结果表明当水柱高度从35 cm提高到435 cm时,黏性原状土的起动摩阻流速是0.35 m水柱高度下流速的2.52~3.06倍;黏性原状土的起动流速随着水压力的增大而增大;水柱高度、原状土的粒径级配以及原状土的密实度是起动摩阻流速的主要影响因素。该试验成果可为黏性原状土起动流速的进一步研究提供参考。

关键词: 水压力, 黏性原状土, 起动流速, 粒径级配, 干密度

Abstract: 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

中图分类号: 

Baidu
map