【摘要】 为了研究天津滨海地区吹填土地基在加固过程中的抗剪强度特性,通过GDS三轴试验系统对吹填重塑土进行不同固结度下的室内不排水剪切试验。试验结果表明,内摩擦角随固结度增加呈非线性增长规律,黏聚力则无明显增长。以国内外重塑土的三轴试验数据为依据,对内摩擦角进行归一化处理得出了固结后期内摩擦角增长预测公式。此外,对固结体应变与土体抗剪强度的关系进行分析得出合适的堆载施加方式。最后,将规范法预测的抗剪强度增长值与计算值进行对比,指出本文内摩擦角预测公式的合理性。更多还原

【Abstract】 To study the characteristic of shear strength during consolidation, the undrained test of remolded soil that made of dredger fill from Tianjin coastal area had been done by using GDS stress path triaxial testing system. The test result shows that the growth rates of internal friction angles not a constant. The growth of cohesion is not significant. According to the triaxial test data of remoulded soil from domestic and overseas, we normalized the value of internal friction angle, and summarized the internal friction angle growth formula. In addition, the relationship between shear strength and consolidation volume strain was also studied to obtain the appropriate application method of surcharge. The predicted shear strength of the standard method is compared with the calculated value, and the rationality of the friction angle prediction formula is pointed out.更多还原