摘要
在河床上填筑土质围堰,由于淤泥土地基的压缩性高、变形大、渗透性低、固结变形持续时间长,所以地基的稳定性成为工程设计面临的主要问题。通过秦淮河船闸扩容改造工程围堰施工的工程实践,分析利用堰体自重挤淤的效果,并通过ABAQUS软件进行数值模拟。对比围堰检测的结果,发现对于淤泥层厚度不大的区域利用水中填筑围堰的自重进行挤淤可以达到很好的效果,从而提高围堰的整体稳定性。
Because of the high compressibility ,low permeability and long duration of the consolidation deformation of silt dam foundation ,the stability of the dam foundation becomes the main problem in engineering design when filling the soil cofferdam on river bed .Here ,the effect of squeezing-silt by using the dam weight is analyzed combined with the engi-neering examples for the cofferdam construction of Qinhuai River ’s lock expansion and renovation project ,and the numer-ical simulation is made by using the ABAQUS software .It is found that taking the use of filled soil cofferdam weight in the water could achieve good squeezing-silt results in the area where the silt layer thickness is small compared with the test results of the cofferdam ,thereby the overall stability of the cofferdam could be improved .
出处
《水利与建筑工程学报》
2014年第1期100-104,共5页
Journal of Water Resources and Architectural Engineering
关键词
挤淤
数值模拟
围堰
squeezing-silt
numerical simulation
cofferdam
