黄土地区某土坝裂缝形成机理探讨  

Study on Cracks Formation Mechanism of Earth Dam in Loess Area

作　　者：李德群[1] 李琛[2] 董承山[1] LI Dequn;LI Chen;DONG Chengshan(China Water Resources Beifang Investigation, Design and Research Co., Ltd., Tianjin 300222, China;Tianjin University, Tianjin 300072, China)

机构地区：[1]中水北方勘测设计研究有限责任公司,天津300222 [2]天津大学,天津300072

出　　处：《人民黄河》2018年第5期129-132,共4页Yellow River

摘　　要：针对黄土地区某水库蓄水后坝体出现的裂缝、塌陷等工程问题,在实测裂缝发生、发展过程基础上,通过对坝体填筑质量评价、坝基地形地貌影响、湿陷性黄土处理效果的分析认为,坝体填筑质量欠佳造成的压缩变形和不均匀变形,是引发裂缝产生的内在条件;坝基沟壑回填处理不良、原有黄土湿陷变形消除不彻底且随着蓄水过程变形不断发展的湿陷机理,是坝体产生裂缝最主要和最直接的原因。Regarding the engineering problems such as cracking and collapsing in dam body after impoundment of a reservoir in loess area,on the basis of measured process during occurrence and developing of cracks,according to the study results of evaluation on backfilling quality,geomorphic influence of dam foundation and treatment effect of collapsible loess,it was concluded that the intrinsic factor triggering cracking was compressive and inhomogeneous deformation caused by low backfilling quality of dam body,while the uppermost and the most direct reasons which caused the cracking in dam body were the poor backfilling quality of gullies on dam foundation,inadequacy of collapsible deformation elimination in loess,combining with the hydro-compaction mechanism with continuous deformation and development along with reservoir impoundment.

关 键 词：土坝 裂缝 黄土 湿陷性 变形 

分 类 号：TV641.2[水利工程—水利水电工程] TU444[建筑科学—岩土工程]