堆石料剪切模量取值试验研究

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英文篇名：Experimental Study of Determination of Maximum Shear Modulus of Rockfill 中文刊名：人民黄河 英文刊名：Yellow River 作者：丁树云 ; 毕庆涛 英文作者：DING Shu-yun ; BI Qing-tao(North China University of Water Resources and Electric Power ; Zhengzhou 450011 ; China) 中文关键词：堆石料 ; 剪切模量 ; 孔隙比 ; 平均有效正应力 英文关键词：rockfill materials ; shear modules ; void ratio ; effective mean normal stress 出版日期：2012-08-10 机构：华北水利水电学院; 年：2012 期：08 出版单位：人民黄河

摘要

利用大型三轴试验,研究了堆石料的等效剪切模量与孔隙比和平均有效正应力的关系。结果表明:根据Hardin公式求得的初始弹性模量均值反算得到的堆石料最大剪切模量与原试验数据相比误差较大,对平均有效正应力函数进行适当改进后,采用线性关系来表示平均有效正应力,反算得到的最大剪切模量与原试验值相比误差在6%之内,比原方法精确度有所提高。
Based on a large-scale triaxial test,it investigated the relation between the equivalent shear modulus and the void radio and the effective mean normal stress.These can reach a conclusion that the back-calculate maximum shear modulus based on the average initial elastic modulus which come from Hardin equation,have a greater error compared with the test results.And then,after improving effective mean normal stress function,expressing effective normal stress with linear relation the error of equivalent maximum shear modules Gmax gained by back-calculation is less than 6% comparing with experimental data.The estimation accuracy can be improved.

引文

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