CAJ | 학술논문

利用GDS先进固结试验系统对萧山软土进行了常规分级加载固结与渗透试验、分级加载流变固结与渗透试验、压缩—回弹—再压缩流变固结与渗透试验,绘制了沉降曲线、孔压消散曲线以及孔隙比和渗透系数的变化曲线,通过回归分析得到了萧山软土的压缩指数、回弹指数、渗透指数、次固结系数.试验结果表明:萧山软土具有明显的流变特性,对于正常固结萧山软土,土样底部超静孔压消散大约在加载后5h左右完成,而超固结土孔压消散速度比正常固结土快,应力历史和超固结比对次固结系数有显著的影响.
이용GDS선진고결시험계통대소산연토진행료상규분급가재고결여삼투시험、분급가재류변고결여삼투시험、압축—회탄—재압축류변고결여삼투시험,회제료침강곡선、공압소산곡선이급공극비화삼투계수적변화곡선,통과회귀분석득도료소산연토적압축지수、회탄지수、삼투지수、차고결계수.시험결과표명:소산연토구유명현적류변특성,대우정상고결소산연토,토양저부초정공압소산대약재가재후5h좌우완성,이초고결토공압소산속도비정상고결토쾌,응력역사화초고결비대차고결계수유현저적영향.
Several sets of 1-D consolidation and permeability tests considering stress history and rheological characteristic of soft soils were conducted by using GDS Advanced Consolidation Test System. A lot of curves have been presented, such as curves of settlement, pore water pressure, void ratio and coefficient of permeability,and some parameters of soft soils were derived by using curve fitting method. It is proved that rheological characteristic of Xiao-shan soft soils is remarkable. The time for pore water pressure dissi?pating completely is about 5 hours for normal consolidated soils, and the pore water pressure dissipating speed of overconsolidated soils is faster than normal consolidated soils. Stress history and OCR have obvi?ous effects on the coefficient of secondary consolidation.