摘要
苏锡常平原自1989年以来,已有18处发生地裂缝,其中横林、长泾、无锡西郊等6处先后进行了地裂缝勘查工作。本文在苏锡常地区已有的水文地质、工程地质资料和地裂缝灾害勘查成果的基础上,分析了基岩面起伏、地面沉降、土层结构等因素对地裂缝的复合作用及影响方式,对苏锡常地区地裂缝灾害的成因及形成过程进行了较为全面的总结。苏锡常地区的地裂缝主要是地面不均匀沉降的结果,基岩面起伏变化较大为地裂缝孕育了内因条件,超量开采地下水是诱发地裂缝的直接原因,30m以浅的土层条件则影响了地裂缝发育程度。
Since 1989,eighteen earth fissures have been discovered in the area, investigation of earth fissures have been made early or later at six sites such as Henglin\,Changjing and Wuxi area. In this paper,based on the data of engineering geology and hydrogeology, together with the investigating results of earth fissures in the Suzhou\|Wuxi\|Changzhou area,the compound function and influence method of such factors as undulation of the basement rocks, land subsidence and soil texture are analyzed, and the formation mechanism and forming process of the earth fissures in the Suzhou\|Wuxi\|Changzhou area summarized fully.The earth fissure hazards in the Suzhou\|Wuxi\|Changzhou area are principally caused by differential land subsidence.Significant undulation of the basement rocks gestates intrinsic conditions for earth fissures.Excessive ground water withdrawal becomes the direct reason for inducing earth fissures.The texture conditions of soil shallower than thirty meters have an influence on the extent of earth fissures.
出处
《水文地质工程地质》
CAS
CSCD
2003年第1期67-72,共6页
Hydrogeology & Engineering Geology
