动力排水固结法加固吹填黏性土的模型试验研究

王珊珊; 李丽慧; 胡瑞林; 刘凯; 魏欣

动力排水固结法加固吹填黏性土的模型试验研究

1.
中国科学院工程地质力学重点实验室中国科学院地质与地球物理研究所北京 100029;
2.
建设综合勘察研究设计院有限公司北京 100007;
3.
北京市水文地质工程地质大队北京 100195

基金项目:

本成果受中国地质调查局项目(编号:1212010814005)和中国科学院知识创新方向性项目(KZCX2-YW-113)资助

详细信息

作者简介:
王珊珊,主要从事软黏土岩土工程方面的研究.Email: shiminali@163.com

中图分类号: P642.13
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出版历程
- 收稿日期: 2010-03-01
- 修回日期: 2010-04-24
- 刊出日期: 2010-12-25

RESEARCH ON INDOOR EXPERIMENTAL MODEL FOR DYNAMIC CONSOLIDATION OF DREDGED CLAY

1.
Key Laboratory of Engineering Geomechanics,IGGCAS,Beijing 100029;
2.
China Institute of Geotechnical Investigation and Surveying,Beijing 100007;
3.
Hydrogeology and Engineering Geology Team of Beijing,Beijing 100195

摘要

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。
- 动力固结 /
- 吹填土 /
- 排水系统 /
- 孔隙水压力
Abstract: 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.
- Dynamic consolidation /
- Soft clay /
- Draining system /
- Pore water pressure

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参考文献(1)

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