适于岩体结构三维建模的非连续地层界面整体重构  

Integrative reconstruction method of non-continuous stratum surface suitable for 3D rock-mass structure modeling

作　　者：徐能雄[1] 田红[1] 于沭[1] 

机构地区：[1]中国地质大学工程技术学院,北京100083

出　　处：《岩土工程学报》2007年第9期1361-1366,共6页Chinese Journal of Geotechnical Engineering

基　　金：国家自然科学基金资助项目(40602037)

摘　　要：在岩体结构三维建模中,利用分区块方法重构被复杂断层系统切割的非连续地层界面时,插值与裁剪计算量巨大、过程烦琐,且无法反映断层两侧地层的相关性。针对该问题,提出了一种非连续地层界面整体重构方法。首先在不考虑断层影响的条件下进行整体插值形成初始地层界面,并根据断层信息形成断层面;然后求出所有断层面与初始地层界面的交线,并以这些交线作为约束,重新进行剖分与插值形成原始地层界面;再利用局部迭代求交计算实际断层交线;最后通过比较法确定断层影响范围,利用离散光滑插值方法(DSI)进行局部调值,实现非连续地层界面的整体重构。In 3D rock-mass structure modeling, when reconstructing non-continuous stratum surface was cut by complex fault system, complexity and difficulty were unavoidable in application of the partition method. In order to solve this problem, integrative reconstruction of non-continuous stratum surface was proposed. In this method, firstly, a primary stratum surface was formed without considering faults through continuous interpolation, and surfaces of faults were also built. Secondly, the intersecting lines between all faults and the primary stratum surface were found, and regarding these intersecting lines as control, the initial stratum surface was rebuilt through re-mesh and re-interpolation. Then, by using the iterative arithmetic of intersection, the true intersecting lines between faults and stratum surface were found. Finally, after determining the affected region of faults, the coordinates of nodes on affected region of the initial stratum surface were adjusted using discrete smooth interpolation （DSI）, and the final stratum surface was reconstructed.

关 键 词：岩体结构 三维建模 断层 非连续 地层界面 整体重构 离散光滑插值 

分 类 号：TU45[建筑科学—岩土工程]