沙堆休止角与含水量关系探究

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英文篇名：A MODIFICATION THEORY FOR THE EXISTING THEORY OF WATER CONTENT AND ANGLE OF REPOSE 作者：王涵斌 ; 史鼎元 ; 王文玲 英文作者：WANG Hanbin;SHI Dingyuan;WANG Wenling;School of aeronautical science and engineering,Beihang University;Shen yuan honors college,Beihang University;School of physics,Beihang University; 关键词：休止角 ; 生成装置 ; 测量装置 ; 修正系数 英文关键词：angle of repose;;generating device;;measuring equipment;;correction factor 中文刊名：GKWL 英文刊名：Physics and Engineering 机构：北京航空航天大学航空科学与工程学院;北京航空航天大学高等理工学院;北京航空航天大学物理科学与核能工程学院; 出版日期：2019-02-15 出版单位：物理与工程 年：2019 期：v.29;No.189 基金：北京航空航天大学2017年校级重点教改项目(教师讲授与同伴教学有机结合的大学物理改革探索);; 北京航空航天大学2019—2022年教育教学改革培育项目(新工科背景下大学物理课程TPE模型教学改革与实践);; 教育部高校指导委员会2017年全国高等学校教学研究项目(DWJZW201706hb) 语种：中文; 页：GKWL201901016 页数：7 CN：01 ISSN：11-4483/O3 分类号：105-110+121

摘要

沙堆休止角是表征沙堆稳定性的重要力学特征,其主要影响因素是沙堆的含水量。准确把握两者之间的关系对探索土壤结构稳定性和泥石流滑坡的风险有重要意义。但由于颗粒物质形成沙堆过程的复杂性,以及人们测量手段的不精密,理论分析中的不确定因素多,人们目前还没有给出明确的沙堆休止角与含水量的函数关系。本文通过设计稳定的休止角的生成装置和非接触式的测定方法,获得了一系列相对可靠的实验数据,并初步构造出沙堆含水量与休止角的函数关系,从微观结构上对函数曲线对应的物理过程给出了合理的解释,丰富了人们对沙堆含水量与休止角关系的实验测量方法和理论认识。
        The repose angle of sandpile is an important mechanical characteristic for characterizing the stability of sandpile.It is of great significance to studying the relationship between soil structure stability and debris flow/landslide risks.Up to now,the exact presentation of the relation between repose angle and water content has not been identified.Due to the imprecise experimental devices and measurement methods,there are many uncertainties inherent in the current theory.This paper is based on the accurate and reliable experimental data captured by the device designed for generating and measuring repose angle.Using experimental data obtained this way,we construct the correction coefficient(a function varying with water content)to solve the problems facing the existing theories,that is,calculation is impossible due to the existence of uncertain variables.As a result,the functional relationship between water content and repose angle is established,and the microstructure explanation on the physical process corresponding to the function curve is made.

引文

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