论文部分内容阅读
连云港地区软土与其他软土地区软土相比具有高含盐特性,且以Cl-、SO42-和Mg2+为主,若采用水泥土搅拌桩法对其进行加固,土中的易溶盐会对桩身质量产生较大的影响。通过立方体抗压强度试验和电子显微镜(SEM)研究高含盐量对水泥土强度影响的内在机理。结果表明:Mg2+、Cl-、SO42-都对水泥土强度具有不同程度的负面作用。其中Cl-对三个龄期的强度都有影响;Mg2+从中期开始发挥作用;SO42-则对水泥土长期强度影响较大。
Compared with the soft soil in other soft soil areas, the soft soil in the Lianyungang area is characterized by high salt content, and is mainly composed of Cl-, SO42- and Mg2 +. If it is reinforced by the cement-soil mixing pile method, the soluble salt in the soil The quality of the pile has a greater impact. The intrinsic mechanism of the effect of high salinity on the strength of cemented soil was studied by cubic compressive strength test and electron microscope (SEM). The results show that: Mg2 +, Cl-, SO42- all have different degrees of negative impact on the strength of cement soil. Among them, Cl- affected the strength of the three age groups; Mg2 + played a role from the middle stage; SO42- influenced the long-term strength of cement soil significantly.