CAJ | 학술논문

分析地表裂缝和滑面状态在滑坡灾害形成过程中表现出来的基本特征，建立地表裂缝和地质体内部破坏状态之间的联系。简单介绍基于连续介质力学的离散元法，对具体的、典型的滑坡进行数值模拟，发现数值模拟结果中的地表裂缝和材料强度有某种相关性，并且存在一个地表最大破裂数。同时定义滑面贯穿时对应的破裂数为滑面最大破裂数。提出破裂度的概念，分地表破裂度和滑面破裂度，取值为滑坡相应位置当前破裂数与最大破裂数之比。研究发现，地表破裂度与滑面的贯通有明确的对应关系，可以直接描述地质体的危险程度，并基于此提出破裂度分析滑坡危险性的基本方法。地表破裂度与网格的划分数目、形状等参数的相关性不大。说明基于破裂度和CDEM分析方法判别滑坡体的危险度是可行的。
분석지표렬봉화활면상태재활파재해형성과정중표현출래적기본특정，건입지표렬봉화지질체내부파배상태지간적련계。간단개소기우련속개질역학적리산원법，대구체적、전형적활파진행수치모의，발현수치모의결과중적지표렬봉화재료강도유모충상관성，병차존재일개지표최대파렬수。동시정의활면관천시대응적파렬수위활면최대파렬수。제출파렬도적개념，분지표파렬도화활면파렬도，취치위활파상응위치당전파렬수여최대파렬수지비。연구발현，지표파렬도여활면적관통유명학적대응관계，가이직접묘술지질체적위험정도，병기우차제출파렬도분석활파위험성적기본방법。지표파렬도여망격적화분수목、형상등삼수적상관성불대。설명기우파렬도화CDEM분석방법판별활파체적위험도시가행적。
Basic characteristics for development of surface cracks and state of slip surface during landslide disaster is studied,and relationship between surface cracks and internal fracture state is established. Continuum-based discrete element method(CDEM) is briefly introduced. Through simulation of specific and typical landslides with CDEM,relativity of strength and surface cracks is discussed and maximum number of surface cracks is found. Maximum number of slip surface cracks is defined as the number of cracks on slip surface which is already running through. The concept of fracture degree of surface and fracture degree of slip surface are proposed,which are defined as the ratio of current number of cracks to maximum number of cracks on surface and slip surface respectively. Numerical experiments show that there is a specific corresponding relationship between fracture degree of surface and state of slip surface,which could directly describe the risk of a geological body. Result shows that fracture degree does not rely on mesh division when calculation accuracy is guaranteed,which indicates that it is feasible to use this new method based on fracture degree and CDEM to evaluate the risk of a landslide.