初始含水量和水泥掺入比对水泥土抗剪强度的影响研究  

Study on the Influence of Initial Water Content and Cement Mixing Ratio on the Shear Strength of Cement-soil

作　　者：李苗 李文照 毛昱 范善智 Li Miao;Li Wenzhao;Mao Yu;Fan Shanzhi(Gansu Provincial Transportation Research Institute Group Co.,Ltd.,Lanzhou,China)

机构地区：[1]甘肃省交通科学研究院集团有限公司,甘肃兰州

出　　处：《科学技术创新》2024年第14期171-174,共4页Scientific and Technological Innovation

摘　　要：粉喷桩在加固湿陷性黄土地基工程中得到了广泛应用。为更好地掌握桩体的力学参数,本文基于室内直剪试验分析了初始含水量和水泥掺入比对固化土抗剪强度的影响。结果表明,固化土的抗剪强度随着初始含水量的增加呈现出先增加后降低的趋势,随着水泥掺入比的增加则呈现出逐渐增加的趋势。本文的室内试验结果对于粉喷桩原位加固湿陷性黄土地基具有重要的指导作用。The dry jet mixing pile has been widely used for strengthening collapsible loess foundation in many engineering projects.In order to better master the mechanical parameters of pile body,the influence of initial water content and cement mixing ratio on the shear strength of cement-soil were analyzed based on the direct shear test in the laboratory.The investigations indicated that the shear strength of cement-soil increased with the increase of initial water content when initial water content was less than the optimal water content for soil,then decreased when initial water content was higher than the optimal water content for soil;the shear strength of cement-soil increased with the increase of cement mixing ratio.The laboratory results in this study provide important guideline for in-situ ground improvement by dry jet mixing pile in collapsible loess regions.

关 键 词：黄土地基 地基处理 粉喷桩 含水量 水泥掺入比 

分 类 号：TU43[建筑科学—岩土工程]