兴仁围豹滑坡形成条件及诱发机制探讨

在亚热带暖温湿润季风气候区,以兴仁围豹滑坡为研究对象,探讨含软弱夹层的顺层滑坡的形成条件及诱发机制。通过实地调查滑坡所在地区的自然地理、气候水文、地形地貌、工程地质、地质构造等有直接影响的环境条件,运用理论综合分析探讨围豹滑坡诱发机制,结果表明:围豹滑坡形成原因为特定的环境条件及人类活动,雨水入渗软化滑动面及静水压力相互作用诱发滑坡。

望谟平洞滑坡发育特征及稳定性分析

以望谟平洞滑坡为研究对象,分析土质滑坡发育特征及稳定性。通过对气候水文、地形地貌、地层岩性及地质构造等地理环境条件的收集整理,分析滑坡平面形态、变形、滑体构成、滑带及滑床等发育特征。采用定性和定量对滑坡稳定性进行分析:定性分析认为斜坡不会沿岩层层面以及节理面产生滑动;采用极限平衡法定量计算滑坡稳定性系数,得知在自然工况滑坡处于基本稳定,在暴雨及地震工况滑坡处于欠稳定~不稳定状态,可知暴雨对斜坡稳定性影响较大。

贵州省盘州比中滑坡形成机制和稳定性分析

以盘州比中滑坡为研究对象,研究滑坡的地质背景条件及基本特征,对其形成机制和稳定性进行分析。通过对滑坡地形地貌、岩土组合、降雨条件及人为活动等影响因素进行分析,结果表明:后缘土体蠕滑推挤中下部土体,形成推移-挤压破坏模式;在定性评价的基础上采取定量计算滑坡的稳定性系数进行分析。滑坡在自然工况稳定状态为基本稳定~稳定,暴雨工况为欠稳定状态,对滑坡影响较大的是降雨作用,降雨是滑坡形成主要诱因。

Decoration of disclinations by solidification-induced band texture and focal-conic texture for a low-molar-mass liquid crystal

Two decoration techniques, solidification-induced band texture decoration and focal-conic texture decoration, have been established to exhibit the director field of disclinations in a low-molar-mass methacrylate liquid crystal. The disclinations with strength s=1/2 and s=±1 are observed by the two decoration methods. For the solidification-induced band texture decoration, the molecular orientation is perpendicular to the direction of the band. While for focal-conic texture decoration, it has been proved by the results of IR dichroism that the direction of the director is parallel to the direction of the focal-conic. Therefore, the sketch map of the molecular director filed can be mapped according to the morphological pattern of the solidification-induced band texture or focal-conic texture.