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砾质土分布很广,在水利工程,大型厂矿的建设中常遇到这种土类。由于土样其颗粒大小对试样尺寸有一定要求,一般常规室内土工仪器都不适合对这种土进行试验研究。本试验的目的是采用自行设计、加工的大型三轴剪力仪(图1),对具有一定代表性的安庆砾质土的应力～应变关系以及影响抗剪强度的主要因素进行试验研究,从而希望对砾质土的基本力学性质有一个较清楚的认识。
The gravelly soil is widely distributed and often encountered in the construction of water conservancy projects, large-scale factories and mines. Because the size of the soil sample has certain requirements on the size of the sample, general conventional indoor geotechnical instruments are not suitable for the experimental study of this kind of soil. The purpose of this experiment is to use a large-scale triaxial shear instrument designed and processed by ourselves (Figure 1) to conduct a pilot study on the stress-strain relationship and the main factors affecting the shear strength of the Anqing gravelly soil. It is hoped that there will be a clearer understanding of the basic mechanical properties of gravelly soils.