摘要
黄土地区湿陷性裂缝是一种较为罕见的不良地质现象,其形态、分布及形成机理均与黄土滑坡裂缝有着本质的区别。由于黄土的水敏性、湿陷性等工程特性,引大入秦水利工程周边形成了一定厚度的、非连续的饱和黄土层。饱和黄土层的自重湿陷和软化压缩作用形成了不均匀的沉降,从而在梁峁顶部及半坡处产生错动裂缝。湿陷性裂缝的形成机理研究可以为新建工程设计提供可靠的依据。
Collapsible cracks are a kind of rare unfavorable geological phenomenon in loess areas. The morphology,distribution and formation mechanism of the cracks are essentially different from landslide cracks.Because of engineering properties of loess such as water sensitivity and collapsibility,a certain thickness,noncontiguous saturated loess layer is formed around the Datonghe-Qinwangchuan Diversion Project. Selfsubsidence,softening and compaction of saturated loess layer lead to an uneven settlement,and then cause fracture on the top of the mountain and hillside. The research of collapsible fracture formation mechanism can provide an accurate basis for design of new constructions.
出处
《水文地质工程地质》
CAS
CSCD
北大核心
2014年第4期149-152,共4页
Hydrogeology & Engineering Geology
关键词
黄土
湿陷性裂缝
饱和黄土
形成机理
loess
collapsible cracks
saturated loess
formation mechanism
