饱和砂土振冲加固的振动液化机理研究
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摘要
地震剪应力理论对饱和砂土振冲加固的振动压密作用机理进行研究,根据砂土水平剪应变的大小,对振冲加固深度范围内砂土的液化状态来确定最佳振冲间距。在工程实践中,通过在饱和砂土地基现场振冲试验剪应变大小的监测分析,确定最佳振冲间距,与传统孔隙水压力监测等方法确定最佳振冲间距相比,更经济快捷、方便可行。
The vibration compaction mechanism in the vibroflotation reinforcement of the saturated sandy soil based on the earthquake shearing stress theory was studied.Based on the horizontal shearing strain in the soil,the liquefaction of the sandy soil within the vibroflotation reinforcement depth was assessed to determine the best vibroflotation space.In Practice,the detection of the shearing strain in the saturated sandy soil foundation was conducted in the field to determine the best vibroflotation space.This practice was proved more effective and feasible than the traditional pore water pressure detection method in determining the best vibroflotation space.
The vibration compaction mechanism in the vibroflotation reinforcement of the saturated sandy soil based on the earthquake shearing stress theory was studied.Based on the horizontal shearing strain in the soil,the liquefaction of the sandy soil within the vibroflotation reinforcement depth was assessed to determine the best vibroflotation space.In Practice,the detection of the shearing strain in the saturated sandy soil foundation was conducted in the field to determine the best vibroflotation space.This practice was proved more effective and feasible than the traditional pore water pressure detection method in determining the best vibroflotation space.
引文
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[2]袁晓铭,孙锐,孙静,等.常规土类剪切模量比和阻尼比试验研究[J].地震工程与工程振动,2000,20(4).
[3]林晓斌.振冲法在细砂地基处理中的实验研究[D].同济大学硕士论文,2002,(1).
[4]周健,王冠英,贾敏才.无填料振冲法的现状及最新技术进展[J].岩土力学,2008,(1).
[5]程国勇,王建华.应用剪切波速判别饱和砂土振动液化的研究现状[J].西部探矿工程,2003,(12).
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