中文摘要：

天然沉积土体一般都具有结构性和初始各向异性.在复杂的应力路径的作用下,天然结构性土体的强度与变形一般与重塑土不同.由于结构性、初始各向异性和复杂的应力路径的共同影响,往往使极限状态设计如何确定天然土体渐进破损的强度及参数变得复杂而困难.给出了关于各向异性的天然结构性土体渐进破损的归一化不排水抗剪强度的解析表达式,并研究了天然结构性土体渐进破损的归一化不排水抗剪强度与各向异性和应力路径等因素的相关性.

英文摘要：

Natural soils usually exhibit initial structure and anisotropy. The strength and deformation of natural soils normally differ from those of the remoulded soils under complex stress path. The mutual effects of the structure, initial anisotropy and complex stress path make it complicated and difficult to determine the progressive destructive strength and parameters of natural soils. The analytical solution to the progressive destructive normalized undrained strength of anisotropic natural soils is derived. The dependency of the progressive destructive normalized undrained strength of natural soils on the initial anisotropy, progressive destruction ratio and stress path is investigated.