%0 Journal Article
%T 土石混合料力学特性的试验研究<br>Experimental study of the behavior of soil-gravel mixtures
%A 王腾
%A 胡岱松
%A 张嘎
%J 清华大学学报（自然科学版）
%D 2018
%R 10.16511/j.cnki.qhdxxb.2018.22.018
%X 土石混合料的强度与变形特性对于灾害防治及工程安全具有重要意义。该文以理想铝棒材料模拟砾石，对土石混合料进行了系列化的平面应变试验。试验结果表明：土石混合料的强度和变形特性与含石量及砾石的形状密切相关，含石量增加以及砾石磨圆度变差都会增加混合料的峰值强度和剪胀特性。试验过程中观测了砾石运动情况，结果表明：砾石主要通过提供转动阻力来阻碍剪切带的形成与发展，从而提高土石混合料的峰值强度。<br>Abstract：The strength and deformation characteristics of the soil-gravel mixtures must be studied for disaster prevention and to improve safety. Serialized plain strain tests are conducted on various soil-gravel mixtures with aluminum bars used to simulate the gravel. The tests show that the gravel content and gravel shape significantly affect the strength and deformation of the soil-gravel mixtures. The peak strength and dilatancy characteristics increase as the gravel content increases and the gravel becomes more psephitic. Measurements of the gravel movement show that the gravel impedes the formation and development of the shear band by providing a rolling resistance which increases the peak strength.
%K 土石混合料
%K 平面应变试验
%K 强度
%K 剪胀
%K &lt
%K br&gt
%K soil-gravel mixtures
%K plain strain test
%K strength
%K dilation
%U http://jst.tsinghuajournals.com/CN/Y2018/V58/I5/456