CAJ | 학술논문

应用空间滑动面原理改进了 Lade-Duncan 弹塑性模型的屈服准则及破坏准则，建立了基于非关联流动法则的改进 Lade-Duncan 弹塑性模型，模型参数可通过常规三轴试验获取。利用潍坊中南部平原地区某深基坑持力层的粉土 UU 三轴试验结果，验证了改进 Lade-Duncan 模型对粉土试样的适应性。改进模型较 Lade-Duncan 弹塑性模型能够更好地反映持力层粉土的( R1- R3)~ E1关系，以及应力路径的相关性与剪胀等特性。改进弹塑性模型可为该地区高层及超高层建筑粉土地基变形计算创造有利条件。
응용공간활동면원리개진료 Lade-Duncan 탄소성모형적굴복준칙급파배준칙，건립료기우비관련류동법칙적개진 Lade-Duncan 탄소성모형，모형삼수가통과상규삼축시험획취。이용유방중남부평원지구모심기갱지력층적분토 UU 삼축시험결과，험증료개진 Lade-Duncan 모형대분토시양적괄응성。개진모형교 Lade-Duncan 탄소성모형능구경호지반영지력층분토적( R1- R3)~ E1관계，이급응력로경적상관성여전창등특성。개진탄소성모형가위해지구고층급초고층건축분토지기변형계산창조유리조건。
The theory of spatial mobilized plane was used to improve the yield criterion and failure criterion of Lade-Duncan elas-toplastic model, and then the modified Lade-Duncan model was established based on the non-associated flow rule. Model parame-ters can be determined by the traditional triaxial test. The adaptability to the modified Lade-Duncan model for silt w as verified based on the triaxial UU test results of the silt samples collect ed in the deep foundation pit of the south-cent ral plain area in Weifang. The modified model can better reflect the relationship bet ween ( R1- R3 ) and E1 of support ing layer of silt, and t he rela-tivity and shear dilatancy properties of stress paths. The modified model can provide reference for the calculation of silt founda-tion deformation of the high-rise buildings and ultra-tall buildings.