摘要
以连云港30万吨级航道建设工程为依托,针对黏粒含量对充填泥袋沉积和排水特性的影响,开展了泥水混合物沉积试验和充填泥袋的排水试验。试验结果表明:1泥水混合物的沉积过程大致可以分为两个阶段,即快速下沉阶段和平稳下沉阶段,快速下沉阶段持续时间较短,平稳下沉阶段持续时间很长,该阶段土体逐渐自重固结;2充填淤泥的黏粒含量越小,沉淀速率越大,沉淀持续时间越长;3充填泥袋的排水率随时间的延长而增大,随着黏粒含量的增加而减小;4从工程安全角度考虑,充填材料的黏粒含量不应大于18%。
Based on the three hundred thousand tons waterway engineering in Lianyungang Harbour, sedimentation test of clay and water mixture and drainage test of mud-filled bag are carried out to study the influences of clay content on the sedimentation and drainage behavior of soil-filled geotextile bag. The results show that:the sedimentation process could be divided into rapid sedimentation stage and steady sedimentation stage approximately, and the rapid subsidence stage has a shorter duration, the later stage has a longer duration, in which the soil consolidates gradually;the smaller the clay content is, the larger the sedimentation rate is and sedimentation duration is longer;the drainage rate of soil-filled bag increases with time and decreases with the incre-ment of clay content;taking account of the engineering safety, the clay content of filled soil should be controlled under 18%.
出处
《人民长江》
北大核心
2014年第19期51-54,共4页
Yangtze River
基金
国家自然科学基金项目(51179106)
国家高技术研究发展计划863项目(2012AA112509)
江苏省交通科学支撑计划项目(BE2011718)
关键词
黏粒含量
沉积
排水
土工织物
充填泥袋
clay content
sedimentation
drainage
geotextile
soil-filled geotextile bag