隆尧地裂缝活动破坏特征及影响宽度分析

Analysis of failure characteristics and influence width of Longyao ground fissure

为准确判断隆尧地裂缝影响范围及致灾程度,基于野外调查结果,结合槽探和物理模拟试验,分析了该地区地裂缝活动带影响宽度。结果表明,隆尧地裂缝全长约35 km,折线状展布,具有正断拉张、西段左旋、东段右旋走滑运动特征。地裂缝灾害发生区与内丘-巨鹿(隆尧南)断裂分布位置基本重合,表明内丘-巨鹿(隆尧南)断裂是隆尧地裂缝的主控断裂。隆尧地裂缝灾害沿地裂缝呈带状分布,地裂缝影响带主变形带为上盘0～15m,下盘0～11m,微变形带为上盘16～46m,下盘12～28m。

In order to accurately determine the extent of the ground fissure and the extent of the hazard of the Longyao ground fissure,the influence width of the ground fissure activity zone in the area was analyzed through the field survey results combined with trenching and physical simulation tests.The results show that the Longyao ground fissure has a total length of about35km and is distributed in a linelike manner.It has the characteristics of normal tensile extension,left-lateral rotation and east-lateral right-lateral strike-slip movement.The distribution of fractures in the ground fissure disaster area and the Neiqiu-Julu(Longyaonan)is basically coincident,indicating that the Neiqi-Julu(Longyaonan)fault is the main fault of the Longyao ground fissure.The cracks in the Longyao ground fissures are distributed along the ground.The main deformation zone of the ground fissure is0~15m on the upper plate and0?11m on the lower plate.The micro-deformation zone is16~46m on the upper plate and12~28m on the lower plate.