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Volume 34 Issue 4
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LIU Song-yu, HAN Wen-jun, ZHANG Ding-wen, DU Guang-yin. Field pilot tests on combined method of vacuum preloading and pneumatic fracturing for soft ground improvement[J]. Chinese Journal of Geotechnical Engineering, 2012, 34(4): 591-599.
Citation: LIU Song-yu, HAN Wen-jun, ZHANG Ding-wen, DU Guang-yin. Field pilot tests on combined method of vacuum preloading and pneumatic fracturing for soft ground improvement[J]. Chinese Journal of Geotechnical Engineering, 2012, 34(4): 591-599.
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Field pilot tests on combined method of vacuum preloading and pneumatic fracturing for soft ground improvement

  • Institute of Geotechnical Engineering, Southeast University, Nanjing 210096, China

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  • Published Date: April 19, 2012
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    • Abstract
  • To overcome the shortcomings of the traditional vacuum preloading method, a new technique is proposed to combine the vacuum preloading with the pneumatic fracturing. This study presents the concept, mechanism, construction procedures and field validation of this new combined method. Field pilot tests were conducted to compare the performances of the proposed new method and the traditional vacuum preloading method in a construction section of Jiangdu-Haian highway. The vacuum degrees, pore water pressures, surface settlements, deep horizontal displacements and groundwater levels were monitored during the field tests. The effectiveness of soft ground improvement is demonstrated by the comparison of CPTU tests and soil property tests before and after ground treatment. The test results show the improvement effects of the proposed method are better than those of the traditional vacuum preloading method by enhancing the vacuum transfer efficiency into the deep soil layers. The proposed method raises the effective treatment depth of the vacuum preloading method and reduces the preloading time of the vacuum loading. The combined method of vacuum preloading and pneumatic fracturing can be widely used in the improvement practice of soft ground.
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    • References (21)
  • [1]
    KJELLMAN W. Consolidation of clayey soils by atmospheric pressure[C]// Proceedings of a Conference on Soil Stabilization, Massachusetts Institute of Technology. Boston, 1952: 258 – 263.
    [2]
    娄 炎 . 真空排水预压法加固软土技术 [M]. 北京 : 人民交通出版社 , 2002. (LOU Yan. Technique of vacuum drainage preloading[M]. Beijing: China Communications Press, 2002. (in Chinese))
    [3]
    闫澍旺 , 侯晋芳 , 程栋栋 . 真空预压有效加固深度的探讨 [J]. 水利学报 , 2007, 38 (7): 774 – 778. (YAN Shu-wang, HOU Jin-fang, CHENG Dong-dong. Effective depth of vacuum preloading for reinforcing soft soil[J]. Journal of Hydraulic Engineering, 2007, 38 (7): 774 – 778. (in Chinese))
    [4]
    朱 超 , 张季超 , 刘 晨 . 真空预压处理广州南沙区软基的加固深度探讨 [J]. 岩土工程学报 , 2010, 32 ( 增刊 2): 421 – 425. (ZHU Chao, ZHANG Ji-chao, LIU Chen. Soft foundation treatment effective reinforced depth by vacuum preloading method[J]. Chinese Journal of Geotechnical Engineering, 2010, 32 (S2): 421 – 425. (in Chinese))
    [5]
    LEONG E C, SOEMITRO R A A, RAHARDJO H. Soil improvement by surcharge and vacuum preloadings[J]. Géotechnique , 2000, 50 (5): 601 – 605.
    [6]
    刘汉龙 , 李 豪 , 彭 劼 , 等 . 真空—堆载联合预压加固软基室内试验研究 [J]. 岩土工程学报 , 2004, 26 (1): 145 – 149. (LIU Han-long, LI Hao, PENG Jie, et al. Laboratory test on vacuum preloading combined with surcharge[J]. Chinese Journal of Geotechnical Engineering, 2004, 26 (1): 145 – 149. (in Chinese))
    [7]
    CHAI J C, HAYASHI S, CARTER J P. Vacuum consolidation and its combination with embankment loading[J]. Canadian Geotechnical Journal, 2006, 43 (10): 985 – 996.
    [8]
    金小荣 , 俞建霖 , 龚晓南 , 等 . 含承压水软基真空联合堆载预压加固试验研究 [J]. 岩土工程学报 , 2007, 29 (5): 789 – 794. (JIN Xiao-rong, YU Jian-lin, GONG Xiao-nan, et al. Field tests on soft soil with confined underground water by vacuum-surcharge preloading[J]. Chinese Journal of Geotechnical Engineering, 2007, 29 (5): 789 – 794. (in Chinese))
    [9]
    谢弘帅 , 宰金璋 , 刘庆华 . 真空井点降水堆载联合加固软土路基机理 [J]. 岩土工程学报 , 2003, 25 (1): 119 – 121. (XIE Hong-shuai, ZAI Jin-zhang, LIU Qing-hua. Mechanism of improving soft clay ground by the combined-method of vacuum dewatering and preloading[J]. Chinese Jounal of Geotechnical Engineering, 2003, 25 (1): 119 – 121. (in Chinese))
    [10]
    房营光 , 徐 敏 , 朱忠伟 . 碱渣土的真空 - 电渗联合排水固结特性试验研究 [J]. 华南理工大学学报 ( 自然科学版 ), 2006, 34 (11): 70 – 75. (FANG Ying-guang, XU Min, ZHU Zhong-wei. Experimental investigation into draining consolidation behavior of soda residue soil under vacuum preloading-electro-osmosis[J]. Journal of South China University of Technology (Natural Science Edition), 2006, 34 (11): 70 – 75. (in Chinese))
    [11]
    CHANG Dave Ta-The, LOU Xiao-ming, XU Si-long, et al. Innovative soft soil stabilization using simultaneous high-vacuum dewatering and dynamic compaction[J]. Journal of the Transportation Research Board, 2010(2186 ) : 138 – 146.
    [12]
    VENKATRAMAN S N, SCHURING J R, BOLAND T M, et al. Application of pneumatic fracturing to enhance in situ bioremediation[J]. Journal of Soil Contamination, 1998, 7 (2): 143 – 162.
    [13]
    LARSSON S, DAHLSTROM M, NILSSON B. Uniformity of lime-cement columns for deep mixing: a fie1d study[J]. Ground Improvement, 2005, 9 (1): 1 – 15.
    [14]
    JOHANSSON A W. Observation of pore pressure and soil movements during lime column installation[C]// Dry Mix Method for Deep Soil Stabilition. Stockholm, 1999: 252 – 258.
    [15]
    VRIEND C, KORT J C M, COLMORGEN E. Soil improvement at the Botlek Railway Tunnel Project Rotterdam[J]. Soft Ground Technology, ASCE, 2000, GSP(112): 472 – 483.
    [16]
    吴燕开 . 排水粉喷桩（ 2D 工法）加固软土地基原理与应用研究 [D]. 南京 : 东南大学 , 2005. (WU Yan-kai, Research of the mechanism and application reinforced soft soil by drain and dry jet mixing[D]. Nanjing: Southeast University, 2005. (in Chinese))
    [17]
    SHEN S L, MIURA N, KOGA H. Interaction mechanism between deep mixing column and surrounding clay during installation[J]. Canadian Geotechnical Journal, 2003, 40 (2): 293 – 307.
    [18]
    刘松玉 , 杜广印 , 洪振舜 , 等 . 排水粉喷桩加固软土地基（ 2D 工法）的试验研究 [J]. 岩土工程学报 , 2005, 27 (8): 869 – 875. (LIU Song-yu, DU Guang-yin, HONG Zhen-shun, et al. On combined method of dry mixing with vertical drain and its practice in soft ground improvement[J]. Chinese Journal of Geotechnical Engineering, 2005, 27 (8): 869 – 875. (in Chinese))
    [19]
    章定文 . 气压劈裂理论与排水粉喷桩复合地基设计理论研究 [D]. 南京 : 东南大学 , 2007. (ZHANG Ding-wen. Pnematic fracturing theory and design principles of a combined DJM and PVD method[D]. Nanjing: Southeast University, 2007. (in Chinese))
    [20]
    刘松玉 , 洪振舜 , 章定文 . 气压劈裂真空法预压法加固软土地基操作方法 [P]. 中国专利 : ZL 2005 1 0038644.0 ， 2007-10-3. (LIU Song-yu, HONG Zhen-shun, ZHANG Ding-wen. A combined pneumatic fracturing and vacuum preloading method for soft ground improvement[P]. Chinese Patent: ZL 2005 1 0038644.0, 2007-10-3. (in Chinese))
    [21]
    章定文 , 刘松玉 , 顾沉颖 , 等 . 土体气压劈裂的室内模型试验 [J]. 岩土工程学报 , 2009, 31 (12): 1925 – 1929. (ZHANG Ding-wen; LIU Song-yu, GU Chen-ying, et al. Model tests on pneumatic fracturing in soils[J]. Chinese Journal of Geotechnical Engineering, 2009, 31 (12): 1925 – 1929. (in Chinese))
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