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通过在 HX- 1 0 0多功能三轴仪上的动三轴试验及在 Drnevich L ong- Tor型共振柱仪上的竖向激振试验 ,研究了水泥土的动本构关系 ,指出水泥土的动应力应变骨干曲线可以用双曲线模型来描述 ,并且对水泥土的阻尼特性进行了探讨 .其次 ,探讨了水泥土材料的初始动弹性模量和水泥掺合比、围压的相互关系 .最后 ,利用 L oma地震记录 ,结合一维剪切梁模型 ,对水泥搅拌桩加固软土地基前后场地放大效应进行对比分析 ,得到的一些结论有助于搅拌桩复合地基的抗震实践
The dynamic constitutive relationship of cemented soil was studied by dynamic triaxial test on HX-1 0 0 triaxial apparatus and vertical excitation test on Drnevich L ong-Tor resonant column apparatus. It was pointed out that cemented soil The dynamic stress-strain diaphram curve can be described by hyperbolic model and the damping characteristics of cement-soil are discussed.Secondly, the initial dynamic elastic modulus of cement-soil material and the relationship between cement mixing ratio and confining pressure are discussed. Finally, using the L oma seismic record and the one-dimensional shear beam model, the magnifying effect of the site before and after the cement-soil mixing pile is strengthened is compared and analyzed. Some conclusions obtained are helpful to the seismic behavior of the composite foundation