动力排水固结法在大面积深厚淤泥软基加固处理中的应用

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摘要结合广州南沙泰山石化成品油库区大面积深厚淤泥软土地基加固处理工程，探讨动力排水固结法处理高含水率、大孔隙比淤泥地基的基本原理、设计参数和施工工艺。对不同区域的孔隙水压力、土压力、分层沉降进行监测，利用标准贯入试验、十字板剪切试验、静力触探试验和载荷试验等原位测试手段对施工过程和加固效果进行检测。根据现场试验数据，分析动荷载作用下淤泥质土的孔隙水压力、土压力和土体沉降的发展规律。测试结果表明：土压力变化、土体沉降与孔隙水压力的变化具有很好的相关性，随着孔隙水压力的消散，土的抗剪强度不断提高，工后沉降大大降低，土体达到超固结状态。研究表明，“动静结合，先轻后重，逐级加能，少击多遍，逐层加固”的施工工艺，结合空间网状排水体系(由水平排水体+竖向塑料排水板+土体微裂隙排水系统组成)，对处理大面积深厚淤泥质软土地基加固效果明显，土体的物理力学性能大大改善，各项指标均能达到或超过设计要求，该法在地基处理工程中具有良好的应用前景。

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	刘勇健
	李彰明
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关键词 ：土力学, 动力排水固结法, 软土地基处理, 监测与检测, 施工工艺, 孔隙水压力

Abstract：Based on silt ground treatment project of Taishan petrifaction storage area of Nansha，Guangzhou，the basic principle，design parameters and construction technology of dynamic drainage consolidation method(DDCM) for improving the mud ground with high water content and large void ratio are discussed. By using field test methods，the pore water pressure，the soil pressure and the layered settlement are measured；the standard penetration test，vane shear test，static cone penetration test and the load experiment have been used to monitor and test the construction process and consolidation effect. According to the experimental data，the laws of pore water pressure，soil pressure and settlement of soft soils under dynamic loading are analyzed. The test results show the correlation among the variation in vertical settlement，soil pressure and excess pore water pressure is significant. With the dissipation of pore water pressure，the shear strength of soil improves and the post-construction settlement reduces，and the soils reach over-consolidated state. The research results reveal that it is obvious to treatment the large area of deep and thick silt foundation with the new construction technology of “static-dynamic combination，the tamping is light first and then becomes larger with energy adds gradually，fewer time and more cycles，consolidation by layer”；combining mesh drainage system which is composed of the horizontal drainage body，the plastic vertical drainage board and micro-fracture system of soils，the physico-mechanical properties are improved obviously，and physico-mechanical properties are better than expected. DDCM has extensive perspectives for soft ground improvement engineering.

Key words： soil mechanics dynamic drainage consolidation method(DDCM) soft ground treatment monitoring and testing construction technology pore water pressure

引用本文:

刘勇健，李彰明，张丽娟. 动力排水固结法在大面积深厚淤泥软基加固处理中的应用[J]. 岩石力学与工程学报, 2010, 29(S2): 4000-4007.
LIU Yongjian，LI Zhangming，ZHANG Lijuan. APPLICATION OF DYNAMIC DRAINAGE CONSOLIDATION METHOD TO REINFORCEMENT AND TREATMENT OF DEEP AND THICK SILT FOUNDATION OF LARGE AREA. , 2010, 29(S2): 4000-4007.

链接本文:

https://rockmech.whrsm.ac.cn/CN/Y2010/V29/IS2/4000

[1] 李彰明. 软土地基加固理论、设计与施工[M]. 北京：中国电力出版社，2006.(LI Zhangming. Reinforcement theory，design and construction of soft soil[M]. Beijing：China Electric Power Press，2006.(in Chinese))

[2] 郑颖人，李学志，冯遗兴. 软黏土地基的强夯机制及其工艺研究[J]. 岩石力学与工程学报，1998，17(5)：571–580.(ZHENG Yingren，LI Xuezhi，FENG Yixing. Study of the DCM mechanism and engineering techniques of soft clay foundation[J]. Chinese Journal of Rock Mechanics and Engineering，1998，17(5)：571–580.(in Chinese))

[3] 雷学文，白世伟，孟庆山. 动力排水固结法的加固机制及工艺特征[J]. 岩土力学，2004，25(4)：637–640.(LEI Xuewen，BAI Shiwei，MENG Qingshan. Mechanism and technology characteristics of dynamic consolidation by drainage[J]. Rock and Soil Mechanics，2004，25(4)：637–640.(in Chinese))

[4] 孟庆山，汪稔，王吉利. 动力排水固结法处理软土地基孔压和变形问题研究[J]. 岩石力学与工程学报，2003，22(10)：1 738–1 741. (MENG Qingshan，WANG Ren，WANG Jili. Study of pore water pressure and deformation of soft clay compacted with dynamic consolidation by drainage[J]. Chinese Journal of Rock Mechanics and Engineering，2003，22(10)：1 738–1 741.(in Chinese))

[5] 白冰，刘祖德. 动静结合排水固结法处理软基若干问题研究[J]. 四川建筑科学研究，2006，26(1)：39–42.(BAI Bing，LIU Zude. Some problems on the method of combining static and dynamic loading[J]. Building Science Research of Sichuan，2006，26(1)：39–42.(in Chinese))

[6] 张俊，杨志银. 动力排水固结法加固软基的若干问题[J]. 岩石力学与工程学报，2004，23(增1)：4 573–4 575.(ZHANG Jun，YANG Zhiyin. Several issues in improvement of foundation of soft soils with dynamic drainage consolidation method[J]. Chinese Journal of Rock Mechanics and Engineering，2004，23(Supp. 1)：4 573–4 575.(in Chinese))

[7] 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)：1 779–1 784.(ZHOU Hongbo，LU Jianhua，JIANG Jianjun. Test Study of reclaimed land of Pudong Airport improved with dynamic and drain consolidation method[J]. Rock and Soil Mechanics，2005，26(11)：1 779–1 784.(in Chinese))

[8] 董伟，闫澍旺，冯守中，等. 采用强夯置换墩加固湿地中高速公路路基的研究[J]. 岩石力学与工程学报，2009，28(增1)：2 966– 2 972.(DONG Wei，YAN Shuwang，FENG Shouzhong，et al. Study of dynamic paction replacement for reinforcing freeway roadbed in wetlands[J]. Chinese Journal of Rock Mechanics and Engineering，2009，28(Supp. 1)：2 966–2 972.(in Chinese))

[9] 贾敏才，王磊，周健. 砂性土宏细观强夯加固机制的试验研究[J]. 岩石力学与工程学报，2009，28(增1)：3 282–3 290.(JIA Mincai，WANG Lei，ZHOU Jian. Experimental research on micro- meso consolidation mechanism of sandy soil with dynamic compaction[J]. Chinese Journal of Rock Mechanics and Engineering，2009，28(Supp. 1)：3 282–3 290.(in Chinese))

[10] 刘吉福. 排水固结法砂垫层厚度需求[J]. 岩土工程学报，2008，30(3)：366–371.(LIU Jifu. Requirements of thickness of sand mats for consolidation method[J]. Chinese Journal of Geotechnical Engineering，2008，30(3)：366–371.(in Chinese))

[11] 王安明，李小根，李彰明，等. 软土动力排水固结的室内模型试验研究[J]. 岩土力学，2009，30(6)：1 643–1 648.(WANG Anming，LI Xiaogen，LI Zhangming，et al. Indoor model test of dynamic drainage consolidation method of soft soil[J]. Rock and Soil Mechanics，2009，30(6)：1 643–1 648.(in Chinese))

[12] 李彰明林军华. 静动力排水固结法处理淤泥软基振动试验研究[J]. 岩土力学，2008，29(9)：2 378–2 382.(LI Zhangming，LIN Junhua. In-situ tests and analyses on vibration influences during mud ground improvement with static-dynamic drainage consolidation[J]. 2008，29(9)：2 378–2 382.(in Chinese))

[13] 李彰明. 广州南沙泰山石化仓储区成品油库区淤泥软基处理工程设计总说明[R]. 广州：广东工业大学建筑设计研究院，2005.(LI Zhangming. The silt ground treatment engineering design general description of Taishan petrifaction storage area of Guangzhou Nansha[R]. Guangzhou：Architectural Design and Research Institute，Guangdong University of Technology，2005.(in Chinese))

[14] 李彰明. 广州南沙泰山石化仓储区淤泥软基处理工程成品油库区监测终期报告[R]. 广州：广东工业大学岩土工程技术开发中心，2006.(LI Zhangming. The silt ground treatment engineering final monitoring report of Taishan petrifaction storage area of Guangzhou Nansha[R]. Guangzhou：Technique Center of Geotechnical Engineering，Guangdong University of Technology，2006.(in Chinese))

[15] 刘勇健. 饱和软土地基的静动力排水固结处理技术与微观机制研究[博士学位论文][D]. 广州：中国科学院广州地球化学研究所，2009.(LIU Yongjian. Research on technique of static-dynamic drainage consolidation method to treatment saturated soft clay and its microstructure analysis[Ph. D. Thesis][D]. Guangzhou：Guangzhou Institute of Geochemistry，Chinese Academy of Sciences，2009.(in Chinese))

[16] MENARD L，BROISE Y. Theoretical and practical aspects of dynamic consolidation[J]. Geotechnique，1975，25(1)：3–18.