摘要
为了研究动力排水固结法加固吹填土地基的效果,研发了大比例尺的室内模拟试验装置并开展了试验。重点对夯沉量、土体内孔隙水压力的瞬时和长期变化进行了监测和分析,得到如下结论:夯击产生的能量以波的形式向土体内部传播,由于波的作用造成土体拉伸形成裂隙,这些裂隙成为初期的排水通道;孔隙水压力的动态变化具有明显的脉动特性,夯击瞬间出现负增长,然后再累积增长;不同深度土体的孔隙水压力增幅不一样;土体表面铺设的砂垫层不仅可以用做排水,还可以作为静力荷载,有助于土体的排水固结。
This paper studies the reinforcement of soft clay by dynamic consolidation with drainage.It develops a large-scale indoor simulation equipment and conducts some tests.It is focused on the monitoring and analyzing for settlement of tamping points as well as instantaneous and long-term variations of pore water pressure.The findings are that the wave generated by tamping spreads inward the soil and it can form stretcher fissures.The fissures become the first drainage channel.The variation of pore water pressure has fluctuations.At the tamping time it appears negative growth.Then it accumulates upward.The increasing range of pore water pressure is relevant with depth.The sand bedding can be used for drainage as well as static load for consolidation.
出处
《工程地质学报》
CSCD
北大核心
2010年第6期906-912,共7页
Journal of Engineering Geology
基金
中国地质调查局项目(编号:1212010814005)
中国科学院知识创新方向性项目(KZCX2-YW-113)资助
关键词
动力固结
吹填土
排水系统
孔隙水压力
Dynamic consolidation
Soft clay
Draining system
Pore water pressure
