岩土介质动静力学参数与介质物理组构参数之间的关系

岩土体是地质历史的产物,有着特定的物质组分和结构构造,从而表现出复杂的工程力学性质。为研究岩土介质动、静力学参数与岩土介质物理组构参数三者的关系,文章结合工程岩土体勘察评价,对岩土介质进行了一系列物理力学测试和波动测试,取得了一定量的测试数据。分析中特别关注了岩土介质的弹性波速与介质密度之间的关系。研究发现,岩样和土样波速与密度测试值在波速-密度参数空间中展现出了几种相对性:整体有序与局部混沌的相对性、分布域位置和结构的确定与域内参数随机分布的相对性、在某一分布域内整体样本无序与各类子样本有序的相对性。把握这几种相对性对于岩土介质的理论研究和工程应用都十分有意义。

RELATIONSHIP BETWEEN STATIC AND DYNAMIC PARAMETERS AND PHYSICAL CONSTITUTIVE PARAMETERS FOR ROCK AND SOIL MEDIA

As a product of geological history, rock and soil media process their special compositions and fabric structures so that their engineering behavior is very complicated. In order to study the relationships between the static parameters and the dynamic parameters, and physical fabric parameters, a series of physical and mechanical tests, as well as elastic wave tests were carried out in combination with engineering estimation of rock and soil media. Analysis of test data revealed that there are several kinds of relativity pertaining to the relationship between the elastic wave velocities and the densities of rock and soil media, i. e. , the relativity between sequence on the whole and chaos in part, the certainty in the position and structure of a local distribution realm and the random distribution in the realm; disorder on the whole in a local distribution realm and the sequence of a certain subordinate member in the realm.