泥石流龙头冲击特性模型实验研究

doi:10.3969/j.>ssn.1674-0696.2014.01.19

重庆交通大学学报（自然科学版） ›› 2014, Vol. 33 ›› Issue (1): 85-89.DOI: 10.3969/j.>ssn.1674-0696.2014.01.19

泥石流龙头冲击特性模型实验研究

何晓英，陈洪凯，唐红梅，朱绣竹

重庆交通大学岩土工程研究所，重庆400074

收稿日期:2013-06-09 修回日期:2013-11-15 出版日期:2014-02-15 发布日期:2015-01-22
作者简介:何晓英(1987一)，女，新疆阿勒泰人，博士研究生，主要从事复杂介质方面的研究。E-mail: diewucanxue@ 126. com

Experimental Study on Impacting Characteristics of Debris Flow Heads

He Xiaoying , Chen Hongkai , Tang Hongmei , Zhu Xiuzhu

Institute of Geotechnical Engineering , Chongqing Jiaotong University , Chongqing 400074 , China

Received:2013-06-09 Revised:2013-11-15 Online:2014-02-15 Published:2015-01-22

摘要/Abstract

摘要： 以平川泥石流沟为原型研制泥石流龙头运动与冲击特性实验模型，探索了5 种浆体勃度、5 种罔相比、4 种间相颗粒粒径组合条件下泥石流龙头冲击特性，实施了85 组冲击实验。实验结果表明:随着浆体秸度的增大，泥石流龙头作用越不明显，当秸度达到和超过0.72 Pa . s 时，龙头消失;泥石流龙头作用时间随着浆体教度与固相颗粒固相比的增加而减小，勃度为0 ， 0. 口， 0.37 Pa . s 时，泥石流龙头冲击时间平均值分别为7.4 ， 2.6 ，1. 6 S; 低茹度与低固相比组合条件下，龙头冲击力峰值为冲击全程峰值，随着站度与固相比的增大，龙头冲击力峰值减小，不再是全程峰值。根据实验数据与图像资料将泥石流龙头形态分为高速高强度龙头形态、过渡塑龙头形态及低速低强度形态。

关键词: 泥石流龙头, 冲击力, 模型实验, 浆体结度, 固相比

Abstract: In analyzing the condition of Pingchuan debtis flow , the physical experimental model was established to analyze the impacting characteristics of debris flow heads. 85 groups impacting tests were can'ied out , with the compounding of 5 slurry viscosities , 5 solid phase ratios and 4 grain diameters , to discuss the impacting characteristics of debris flow heads. The results show that the effect of debris flow heads is decrease with the increase of the slurry viscosity ， and when the viscosity is equal or more than O. 72 Pa . s , the debris flow heads disappear.Tle impacting time of debtis flow heads reduces with the increase of slurry viscosity and solid phase ratio , and when the slurry viscosity are 0 ,0. 13 ,and 0.37 Pa' s , the mean impacting time partly be 7.4 , 2. 6 , and 1. 6 s correspondingly. Tle impacting peak value of the debtis flow head is the peak value of the whole impacting value of debris flow when the slurry viscosity and solid phase ratio is low. And when they increase , the peak value of the head is no longer the peak value of the whole process. According to the expetimental and imame data , the configuration of debris flow can be classified into three type including high speed-high intensity heads configuration, transitional type heads configuration, and low speed-low intensity heads configuration.

Key words: debris flow heads, impact force, model test, slurry viscosity, solid phase ratio

中图分类号:

P642.23
0359

何晓英，陈洪凯，唐红梅，朱绣竹. 泥石流龙头冲击特性模型实验研究[J]. 重庆交通大学学报（自然科学版）, 2014, 33(1): 85-89.

He Xiaoying , Chen Hongkai , Tang Hongmei , Zhu Xiuzhu. Experimental Study on Impacting Characteristics of Debris Flow Heads[J]. Journal of Chongqing Jiaotong University(Natural Science), 2014, 33(1): 85-89.

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泥石流龙头冲击特性模型实验研究

Experimental Study on Impacting Characteristics of Debris Flow Heads

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