复杂不连续层间剪切带三维可视化及模型分析  

3D Visual Reconstruction and Model Analysis of Complex Shear Zone Between the Layers

作　　者：程超杰[1] 项伟[1] 王菁莪[2] 黄伟[1] 李岚星 

机构地区：[1]中国地质大学(武汉)工程学院,武汉430074 [2]中国地质大学(武汉)教育部长江三峡地质灾害研究中心,武汉430074

出　　处：《地质科技情报》2016年第6期18-23,共6页Geological Science and Technology Information

基　　金：国家自然科学基金项目(41272308;41502280)

摘　　要：层间剪切带由于沉积环境、构造运动和水岩物理化学作用导致其空间分布形态复杂且不连续,在大坝工程建设中对坝基的安全稳定有重要的影响。传统研究剪切带主要通过地质剖面图、平面图附以定性描述展开,对剪切带空间整体特征描述不够清晰准确。分析了剪切带成因及形态特征,以勘察资料为基础,确定模型核心数据及控制点,以人机交互方式建立虚拟钻孔并确定边界,通过DSI离散光滑插值拟合法重构剪切带三维空间模型,并依据剪切带成因对模型做出合理性评价;最后通过一个应用实例所建立的剪切带空间模型分析,证实了该方法构建复杂不连续层间剪切带的可行性。Due to the sedimentary environment, tectonic movement and water-rock interaction, the inter- layer shear zone form a complex and discontinuous spatial distribution which has a great influence on the stability and safety of the darn. Traditional research mainly based on geological profiles and engineering geological plans with qualitative descriptions cannot describe the form of shear zone clearly and accurately. In this paper, a new method of 3D visual model reconstruction of shear zone is proposed using 5 core steps, control points determination, virtual drilling establishing, boundary analysis, interpolation and evaluation of reasonableness. This method can make 3D reconstruction of the shear zone more intelligently as a result of reduction of human intervention combined with the evaluation of geological cause of formation. Its application to the construction of 3D geological modeling in a dam project shows that it is an effective method to construct 3D model of shear zone.

关 键 词：剪切带 三维地质模型重构 DSI插值 虚拟钻孔 TIN 

分 类 号：P554[天文地球—构造地质学]