摘要
针对工程建设中日益彰显的软土地基病害,结合研究中的不足与实际工程需要,运用压实法制作了8组不同干密度试样,研究不同初始孔隙比重塑饱和膨润土的压缩性状。试验结果表明:膨润土e-lgσv'压缩曲线呈现类似天然沉积土的倒"S"形压缩曲线,存在天然沉积土般的结构性及固结屈服压力。由于膨润土的固有特性以及孔径分布等的影响,不同孔隙比的压缩曲线存在明显差异,初始孔隙比大的压缩曲线位于初始孔隙比小的压缩曲线上方。根据Burland的固有压缩理论,可以对重塑饱和膨润土进行良好归一化。
As the increasingly apparent disease in the engineering construction in soft soil foundation,and insufficient study,8 groups of different dry density samples were prepared by compaction method for the project improvement. The compression properties of different initial void ratios were studied to remold saturated bentonite.It is found that bentonite compression curve shapes like an＂S＂which exists in natural sedimentary soil structural yield pressure and consolidation. Due to the intrinsic characteristics of bentonite and the influence of pore size distribution,there are obvious differences with different ratios in the compression curves. The compression curve of big initial void ratio is located above the small initial void ratio. According to the inherent Burland compression theory,it is good to reshape the saturation of bentonite normalization.
出处
《桂林理工大学学报》
CAS
北大核心
2015年第4期850-854,共5页
Journal of Guilin University of Technology
基金
广西自然科学基金创新研究团队项目(2012GXNSFGA060001)
广西自然科学基金重大项目(2012GXNSFEA053002)
广西自然科学基金项目(2014GXNSFBA118236)
广西研究生教育创新计划项目(YCSZ2015159)
关键词
膨润土
孔隙比
压缩性
结构性
归一化
bentonite
void ratio
compressibility
constitutive property
normalization
