碎石长桩与水泥土短桩复合加固液化土的孔压比变化规律探讨  

Study on Pore Pressure Ratio of Liquefiable Sand Soil Reinforced by Long Gravel Pile and Short Soil-Cement Pile

作　　者：刘峰[1] 牛琪瑛[1] 刘建君[1] 

机构地区：[1]太原理工大学建筑与土木工程学院,太原030024

出　　处：《太原理工大学学报》2013年第3期378-380,404,共4页Journal of Taiyuan University of Technology

基　　金：国家自然科学基金资助项目(50578104)

摘　　要：通过碎石长桩与水泥土短桩复合加固液化土振动台试验,研究了未加固和复合加固的模型地基在振动过程中的超静孔隙水压力和孔压比的变化过程,结果表明加固过的地基能够明显抑制深层和中层土体液化的发生,揭示了碎石长桩与水泥土短桩复合对液化土的加固机理,研究成果可为以后在实际工程中的应用提供一些参考依据。By the shaking test of liquefiable soil reinforced by long gravel pile and short soil-cement pile,pore water pressure and pore pressure ratio variation process during vibration were analyzed for unreinfored foundation model and the foundation model reinforced by long gravel pile and short soil-cement pile composite.The reinforced foundation significantly limited the liquefaction of middle and deep soil.The reinforcement mechanism of liquefiable soil by long gravel pile and short soil-cement pile was revealed.The results provide some references for practical project liquefiable sand soil reinforcement in the future.

关 键 词：碎石长桩 水泥土短桩 液化砂土 超静孔隙水压力 孔压比 

分 类 号：TU473.1[建筑科学—结构工程]