岩土工程学报2023，Vol.45Issue(z2)：37-41,5.DOI:10.11779/CJGE2023S20039
复杂荷载作用下饱和钙质砂孔压特性及损耗能试验研究
Experimental study on characteristics of pore water pressure and dissipated energy of saturated calcareous sand under complex loading conditions
摘要
Abstract
Calcareous sand,the special soil,is the main material for the filling of islands and reefs in the South China Sea,which is biogenic sediments and skeletal remains of marine organisms.It is of great importance to study its dynamic characteristics.By a series of undrained cyclic triaxial tests on the calcareous sand,the characteristics of pore water pressure are investigated.Besides,the energy method is used to establish the relation between the pore water pressure and the dissipated energy.The results show that the ultimate residual pore pressure ratio of the saturated calcareous sand increases first and then decreases with the change of consolidation stress ratio.The accumulated dissipated energy during cyclic loading is related to the initial static shear stress ratio and relative density of the sample,and has few influences on the cyclic stress ratio.The dissipated energy of the saturated calcareous sand under different test conditions can be predicted by the energy model.The research provides theoretical basis and technical support for the stability analysis of calcareous sand foundations.关键词
钙质砂/孔压特性/损耗能/初始静剪应力/相对密实度Key words
calcareous sand/characteristic of pore water pressure/dissipated energy/initial static shear stress/relative density分类
土木建筑引用本文复制引用
李宝建,王哲,吕国儿,潘坤,杨仲轩,龚晓南..复杂荷载作用下饱和钙质砂孔压特性及损耗能试验研究[J].岩土工程学报,2023,45(z2):37-41,5.基金项目
浙江省博士后科研择优资助项目(ZJ2022012) （ZJ2022012）
国家自然科学基金项目(52178362) （52178362）
浙江省自然科学基金项目(LY23E080009) （LY23E080009）
