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)

[1] 林宗元主编. 岩土工程治理手册
[S].沈阳: 辽宁科技出版社, 1991, 392～415.
Lin Zongyuan.Geotechnical Prosessing Manual.Shenyang: Liaoning Science and Technology Publishing House, 1991, 392～415.

[2] 曾国熙等. 地基处理手册
[S].北京:中国建筑出版社, 1992, 214～260.
Zeng Guoxi, et al. Foundation Prosessing Manual.Beijing: China Architecture & Building Press, 1992, 214～260.

[3] 胡瑞林. 软黏土动力排水固结机理研究综述
[J].工程地质学报, 2006, 14 (1): 45～51.
Hu Ruilin.On the mechanism of dynamic consolidation with drainage of soft clay and its applications. Journal of Engineering Geology, 2006, 14 (01): 45～51.

[4] 周红波, 卢剑华,蒋建军.动力排水固结法加固浦东机场促淤地基试验研究
[J].岩土力学, 2005, 26 (11): 1779～1784.
Zhou Hongbo,Lu Jianhua,Jiang Jianjun. Test study on reclained land of Pudong Airport improved with dynamic and drain consolidation method.Rock and Soil Mechanics, 2005, 26 (11): 1779～1784.

[5] 李彰明. 软土地基加固的理论、设计与施工
[M].北京:中国电力出版社, 2006.
Li Zhangming.Theory,Design and Construct of Soft Soil Improvement.Beijing:China Electric Power Press, 2006.

[6] 冯遗兴, 郭始光,冯康曾.动力排水固结法加固某工程软土地基
[J].工程力学,1996,(增刊): 456～459.
Feng Yixing,Guo Shiguang,Feng Kangzeng,The method of dynamic drainage consolidation applied for soft soil foundation project.Engineering mechnics,1996,(s1): 456～459.

[7] 郑颖人, 陆新,李学志,冯遗兴.强夯加固软黏土地基的理论与工艺研究
[J].岩土工程学报, 2000, 22 (1): 18～22.
Zheng Yingren,Lu Xin,Li xuezhi,Feng Yixing.Research on theory and technology of improving soft clay with DCM.Chinese Journal of Geotechnical Engineering, 2000, 22 (1): 18～22.

[8] 孟庆山. 淤泥质黏土在冲击荷载下固结机理研究及应用
[J].岩石力学与工程学报, 2003, 22 (10): 1762～1762.
Meng Qingshan.Research on mechanism of silty soft clay under imact loading and its application.Chinese Journal of Geotechnical Engineering, 2003, 22 (10): 1762～1762.

[9] 白冰, 刘祖德.冲击荷载作用下饱和软黏土孔压增长与消散规律岩土力学
[J]. 1998, 19 (2): 33～38.
Bai Bing,Liu Zude.Growth and dissipation of pore water pressure in saturated soft clay under impact loading.Rock and Soil Mechanics, 1998, 19 (2): 33～38.

[10] 曾庆军, 周波,龚晓南.冲击荷载下饱和黏土孔压特性初探
[J].岩土力学.2001, 22 (4): 427～431.
Zeng Qingjun,Zhou Bo,Gong Xiaonan.The properties of porewater in saturated clay soils under impact load.Roke and Soil Mechanics.2001, 22 (4): 427～431.

[11] 薛茹. 动力排水固结法加固机理及土体固结的微结构研究 ,北京:中国矿业大学(北京), 2004.
Xue Ru,Research on Reinforced Mechanics of Dynamic Consolidation with Pre-compression and Micro-struture of Soil Consolidation.Beijing: China University of Mining and Technology(Beijing), 2004.

[12] 李丽慧, 王珊珊,魏欣等.动力排水固结模型试验装置的研制
[J].工程地质学报.2009, 17 (4): 570～575.
Li Lihui,Wang Shanshan,Wei Xin,et al. Development of experimental equipment of dynamical consolidation by drainage.Journal of Engineering Geology.2009, 17 (4): 570～575.

[13] 李怀奇. 动力排水固结法处理软土地基的数值模拟 .北京:中国矿业大学(北京), 2004.
Li Huaiqi.The Numerical Simulation of Soft Foundation Improved by Dynamic Drainage Consolidation.Beijing: China University of Mining and Technology(Beijing), 2004.

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