【摘要】 河北平原是地裂缝地质灾害较发育的地区。通过河北平原地裂缝地质灾害时空分布规律研究,对河北平原地裂缝形成的主要因素及成因机制进行了研究。河北平原地裂缝主要分布在山前冲洪积扇裙区,发育在全新世地层中。地裂缝地质灾害平面形态上可分为直线型、雁列型、锯齿型、折线型和弯曲形。地裂缝地质灾害空间分布上有方向性、群集性和系统性。河北平原地裂缝分布范围呈逐渐扩大的趋势;分布区域从时间上呈逐渐由南向北扩展之势。河北平原从时间上地裂缝发育条数和发育长度随时间各有不同特点。导致河北平原地裂缝发生的主要因素有地震构造、地下水超采和地面塌陷。更多还原

【Abstract】 Earth fissures are a serious geological hazard in Hebei Plain.This paper presents their temporal and spatial variations.The majority of earth fissures occur in alluvial-proluvial apron zone.Earth fissures express themselves at land surface as straight line,crenata,polygonal line and forniciform.The spatial distribution of ground fissures can be characterized as directional,cluster and systematic.Length and intensity of earth fissures also vary with time.The primary causes for earth fissuring includes earthquake activities,groundwater overdraft and ground collapse.更多还原