[1]刘忠玉..无粘性土中管涌的临界水头梯度研究[J].郑州大学学报(工学版),2003,24(04):67-71.[doi:10.3969/j.issn.1671-6833.2003.04.016]
　LIU Zhongyu..Study on critical head gradient of pipe surge in cohesive soil[J].Journal of Zhengzhou University (Engineering Science),2003,24(04):67-71.[doi:10.3969/j.issn.1671-6833.2003.04.016]

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无粘性土中管涌的临界水头梯度研究()

分享到：

《郑州大学学报(工学版)》[ISSN:1671-6833/CN:41-1339/T]

卷:

24

期数:

2003年04期

页码:

67-71

栏目:

出版日期:

1900-01-01

文章信息/Info

Title:

Study on critical head gradient of pipe surge in cohesive soil

作者:

刘忠玉.

郑州大学土木工程学院,河南,郑州,450002

Author(s):

LIU Zhongyu.

关键词:

无粘性土;  管涌;  临界水头梯度;  颗粒级配

Keywords:

No cohesive soil;  Pipe surge;  critical head gradient;  Granule grading

DOI:

10.3969/j.issn.1671-6833.2003.04.016

文献标志码:

A

摘要:

将管涌型无粘性土中的颗粒分为骨架颗粒、阻塞颗粒和可动颗粒三组,在分析骨架孔隙中可动颗粒受力的基础上,将总压力降分为骨架孔隙壁引起的压力降、骨架孔隙中静止颗粒引起的压力降及正在运动的颗粒引起的压力降三部分,从而得到了可动颗粒起动的临界水头梯度公式.对管涌试验的校验证实了该公式的有效性.计算结果表明:当有细颗粒流失后,级配不连续的管涌型土比级配连续的管涌型土更易发展成管涌破坏.同时还证实:随着可动颗粒的流失,管涌破坏可以转化为流土破坏.

Abstract:

The particles in the pipe surge type non-cohesive soil were divided into three groups: skeleton particles, blocking particles and movable particles, and on the basis of analyzing the force of movable particles in the skeleton pores, the total pressure drop was divided into three parts: the pressure drop caused by the skeleton pore wall, the pressure drop caused by the static particles in the skeleton pores and the pressure drop caused by the moving particles, so as to obtain the critical head gradient formula for the starting of movable particles. The verification of the pipe surge test confirms the effectiveness of the formula. The calculation results show that when fine particles are lost, the discontinuous pipe surge soil is more likely to develop into pipe surge failure than the continuous pipe surge soil. At the same time, it is also confirmed that with the loss of movable particles, pipe surge failure can be transformed into flow soil failure.

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