山东菏泽冲积平原地区粉土湿陷成因探讨

Cause of ground subsidence in Heze plain areas

影响黄河下游冲积平原地面塌陷的原因很多,属于次生黄土的粉土、砂土等在菏泽地区地表广泛分布,次生黄土湿陷作用是诱发地面塌陷主要原因。造成粉土湿陷的原因可以归纳为内因和外因两种原因。内因与本身的物质成分有关,如:颗粒组成、矿物成分、化学成分等;外因主要是水分和压力作用。黄河冲击平原各种微地貌的存在增加了发生湿陷的可能性。

Yellow River flood plain of lower reachers ground subsidence affecting many reasons, are secondary loess silt, sand and other surface areas are widely distributed in Heze, secondary loess collapsibility main role is to induce ground collapse. Causing silt collapsible reasons can be summarized as internal and external causes two reasons. Internal and their material composition, such as： particle composition, mineral composition, chemical composition, etc. ; external factors are mainly water and pressure. The Yellow River alluvial plain of various micro landform in the presence of increased the likelihood of occurrence of collapsibility.