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超软地基真空预压浅层加固现场试验研究

关云飞, 唐彤芝, 陈海军, 李小梅

关云飞, 唐彤芝, 陈海军, 李小梅. 超软地基真空预压浅层加固现场试验研究[J]. 岩土工程学报, 2011, 33(zk1): 97-101.
引用本文: 关云飞, 唐彤芝, 陈海军, 李小梅. 超软地基真空预压浅层加固现场试验研究[J]. 岩土工程学报, 2011, 33(zk1): 97-101.
GUAN Yun-fei, TANG Tong-zhi, CHEN Hai-jun, LI Xiao-mei. Field tests on shallow treatment of super-soft ground by vaccum preloading method[J]. Chinese Journal of Geotechnical Engineering, 2011, 33(zk1): 97-101.
Citation: GUAN Yun-fei, TANG Tong-zhi, CHEN Hai-jun, LI Xiao-mei. Field tests on shallow treatment of super-soft ground by vaccum preloading method[J]. Chinese Journal of Geotechnical Engineering, 2011, 33(zk1): 97-101.

超软地基真空预压浅层加固现场试验研究  English Version

基金项目: 金项目(BK2009052);南京水利科学研究院青年基金项目(Y310006)
详细信息
    作者简介:

    关云飞 (1978 – ) ,男,江苏如皋人,博士,主要从事岩土力学特性、软土固结与地基处理等方面的研究工作。

  • 中图分类号: TU471.8

Field tests on shallow treatment of super-soft ground by vaccum preloading method

  • 摘要: 超软地基浅层加固的技术难题是如何使极高含水率且没有承载能力的稀泥尽快排水固结。在传统真空预压技术的基础上,提出采用无砂垫层真空预压法对新近吹填的超软淤泥地基进行浅层加固,并在温州民科基地进行现场试验,研究真空压力传递、地表沉降和孔隙水压力消散规律,对比加固前后土体物理力学指标和地基承载力,试验结果表明吹填层加固效果明显,满足后续工程施工的承载要求。提出适合超软地基浅层加固的土体强度增长和地基承载力实用计算方法,利用该方法对大面积处理区的加固效果进行了预测。
    Abstract: The key technical problem of shallow treatment of super-soft ground is how to make the mud drainage consolidation as soon as possible, which has high water content and little bearing capacity. The traditional vacuum preloading process which is used for strengthening general soft ground is improved. A new vacuum preloading construction method without sand cushion, which fits reinforcement of the shallow foundation of fresh hydraulic fill mud, is proposed, and it is studied by field tests in Wenzhou Private Economic Development Zone. The transmission of vacuum pressure, surface settlement and pore pressure dissipation are studied. By comparing the physical and mechanical indicators as well as bearing capacity between reinforced foundation and fresh hydraulic fill mud, the results show that the consolidation effect of hydraulic fill layer is evident which meets the load requirements of the follow-up construction. A practical calculation method for increasing soil strength and bearing capacity, which fits the shallow treatment of super-soft ground, is proposed. It is successfully used to predict the reinforcing effects of large processing area.
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出版历程
  • 收稿日期:  2011-04-28
  • 发布日期:  2011-11-30

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