文档介绍：管袋充填细颗粒土料高效固结排水试验研究
摘要:充泥管袋筑堤的施工速度主要受制于管袋充填后的排水固结效率,后者与所充填土料的级配有关,土颗粒粒径越小排水固结效率越低。我国东南沿海地区广泛分布的小粒径充进管袋后淤堵严重,传统的管袋充填施工工艺已经不再适用。通过室内试验对比,发现细颗粒含量较高的土料充填后会在管袋表层形成软弱泥层,难以固结;而在管袋表层开设排泥口后可以有效排除管袋表层的细颗粒泥浆,提高了排水的效率。通过吊袋沉淀试验发现,不同级配的土料沉淀后粒径较大的土颗粒大部分于吊袋底部,粒径较小的细颗位于吊袋表层;管袋表层开设排水口不会造成粗颗粒土料的损失。
关键词:充泥管袋;高效固结排水;放水排泥
中图分类号:TV41 文献标志码:A 文章编号:16721683(2015)05090104
Experimental study of efficient consolidation drainage for tubes filling with soil material of fine particles
CHANG Guangpin1,WU Xiaonan2,SHU Yiming1,LIU Yunfeng1,GU Ke1
( Conservancy and Hydropower Engineering,Hohai University,Nanjing 210098,China;
Total Transportation Construction Contracting Ltd.,Shanghai 200136,China)
Abstract:The construction speed of embankment with mudfilled tubes is constrained by the consolidation drainage efficiency after the filling of tubes,which is related to the gradation of the filling soil soil particle size results in smaller consolidation drainage the southeastern coastal area of China,there are a lot of soil material with small grain size,which can cause serious clogging when they are filled into the tubes,and therefore the traditional construction scheme of tube filling is no longer study of laboratory tests showed that filling the tubes with the soil material of high content of finegrained particles can form a