动力固结法加固饱和土地基的适用条件研究

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摘要根据现场典型实测资料，研究动力固结法处理饱和土地基的土性适用条件、地层的排水条件和施工工艺参数等。分析不同地层条件下，强夯荷载作用引起的孔隙水压力的增长和消散规律、单点夯击能量、夯击次数以及遍与遍之间的间隙时间、强夯加固的影响范围等。研究结果表明，不同地层条件下的排水要求是不同的，而所应采取的强夯参数和能达到的地基承载力也有很大差异；在地层一定深度范围内，冲击荷载引起的孔隙水压力往往高于相应点处的自重应力并形成较多的裂隙通道，因此加速孔隙水压力的消散过程；对于透水性差的土层，应采取必要的排水措施和小能量强夯荷载，而对于透水性较好的土层则可采取较大的能量。

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	江荣丰

关键词 ：土力学, 动力固结法, 饱和土, 地基处理, 工艺参数

Abstract：According to some typical field tests，the validity of soil properties and drainage condition for saturated soft soil foundation by dynamic consolidation method are studied. The treatment techniques of the method are discussed，which include the development and dissipation of pore water pressure，single point tamping energy，compacting number，the time between tamping and the next tamping，and the affecting scopes，etc. The result shows that the drainage conditions，for various saturated soils，are different from each other. In practical engineering，design parameters and the bearing capacity of reinforced grounds are determined by soil properties. In a certain depth of soil layer，the pore water pressure induced by impact loading is usually higher than its self-weight stress and then produces many fissure channels，which accelerates the drainage process. For the ground soil with low permeability，drainage measurement and small dynamic loading are should be adopted，but for the ground soil with higher permeability，a greater dynamic loading should be adopted.

Key words： soil mechanics dynamic consolidation method saturated soil foundation treatment process parameters

引用本文:

江荣丰. 动力固结法加固饱和土地基的适用条件研究[J]. 岩石力学与工程学报, 2012, 31(S1): 3196-3202.
Jiang Rongfeng . APPLICABLE CONDITIONS OF DYNAMIC CONSOLIDATION METHOD IN SATURATED SOIL FOUNDATION. , 2012, 31(S1): 3196-3202.

链接本文:

https://rockmech.whrsm.ac.cn/CN/Y2012/V31/IS1/3196

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