黄土体工程地质的研究体系及若干问题探讨

Research on Systematic Frame and Some Problems of Engineering Geology of Loess Mass

针对黄土的结构性、水敏性和裂隙性等特殊性质,建立了适合黄土体特征及特性的黄土体工程地质研究体系研究对象、理论基础、内容、路线和方法,指出其研究对象是黄土体。黄土体结构面及其相关问题是黄土体工程地质研究的薄弱环节。探讨了黄土体结构面的分类和分级、黄土体结构类型、洞室围岩类别和黄土体的水敏性等问题,并根据结构面的规模、活动特征及其对工程的危害程度,将黄土体结构面分为6级。依据黄土的沉积特点、结构面的特征和工程黄土体的范围将黄土体结构分为均质结构、层状结构、柱状结构、块裂结构和碎裂结构。认为加强和突出黄土体工程地质研究,有助于正确认识黄土体工程地质特征和解决相关的工程地质问题。

Based on the special properties of loess, such as structure, water sensitivity and fissure, the systematic frame of engineering geological research on loess mass is established, including its research object, basic theory, contents, route and methods. It is pointed out that the research object is loess mass and the characteristics of structural planes and their associated engineering geological problems are studied little in engineering geological research on loess mass. Some problems, such as sort and grade of structural planes, structural types, surrounding rock classification and water sensitivity of loess mass, are also discussed. According to the scale and activity of structural planes in loess mass and their effect on the stability of engineering, loess mass structural planes are classified into 6 grades. And loess mass structures are divided into four types as homogeneous, stratified, columnar, blocky and cloddy pulverescent structures based on the sedimentation characteristics of loess, features of structural planes and range of engineering loess mass. To emphasize and strengthen research on those problems will be helpful to know the characteristics and solve the engineering geological problems of loess mass.