大型扭剪仪在粗粒材料研究中的应用

Application of Large Scale Torsional Shear Apparatus on Coarse Aggregate Research

粗粒材料工程性质研究一般通过三轴试验进行。当粗粒材料用以筑坝时，用空心圆筒试样以扭剪方式测求其力学参数，尤其是动变形参数更符合实际坝体的应力状态。本文结合笔者在日本进修期间参加大型扭剪试验的体会，首先介绍日本建设省土木研究所研制的大型多用途扭剪仪及其试验方法；然后利用近年来的部分试验成果对粗粒材料的变形特性的主要影响因素作了简要分析。

The engieering properties of coarse a8gregate are usually obtained by triaxial apparatus.Using torsional shear test in hollow cylinder sample to get mechanical parameters,especially danamic de formation parameters is rather conformable to the real stress conditions of a dam. In this paper the large scale manifold torsional shear apparatus and its test method made by the Civil Engineering Re-search Institute,the ministy of construction of Japan,are first presented,associated to the writer's ex-perience in studying in Japan. Besides, using parts of the test results in recent years,the anthor analyzes the main factors effecting the dynamic deformation properties of coarse aggregate.