Soils subjected to the loading or unloading in geotechnical engineering applications like foundation excavation, embankment, and tunnel construction will reconsolidate under different stress paths. This paper presents an experimental investigation on the effect of stress path on shear strength characteristic of reconstituted Zhenjiang clay. Specimens were isotropically or anisotropically consolidated and sheared without drainage in triaxial shear tests. Test results showed that undrained shear strength (S_u) under various stress paths is markedly influenced by the stress ratio (η), which is defined as the ratio of the deviator stress to the mean effective stress (p′). S_u almost linearly increases with p′ or η at a given η or p′. The value of S_u for specimens consolidated under different stress paths can be predicted as a function of p′ and η, i.e., S_u = (0.13η + 0.37)p′. It is concluded that S_u of specimen under anisotropic consolidation is higher than that under isotropic consolidation at a certain p′. Moreover, specimen anisotropically consolidated to the same p′ at higher η results in an increase in S_u compared with that at lower η. Duncan-Chang model can be employed to characterize the strength behavior of reconstituted clays under various consolidation stress paths. The variation of c or c′ is insignificant under different η, indicating that the effect of η on cohesion is negligible. φ increases linearly with η while φ′ shows an insignificant change.

在岩土工程应用（例如基础开挖，路堤和隧道施工）中承受装卸的土壤将在不同的应力路径下重新固结。本文对应力路径对再生镇江黏土抗剪强度特性的影响进行了实验研究。在三轴剪切试验中，样品被各向同性或各向异性固结并剪切而没有排水。试验结果表明，在不同应力路径下不排水的剪切强度（S _u）受到应力比（η）的显着影响，应力比（η）定义为偏向应力与平均有效应力（p '）之比。S _u随p '或η在给定η或p ' 。的值小号_ü为不同应力路径下固结标本可以被预测为的函数p '和η，即小号_û =（0.13 η + 0.37）p ' 。结论是：在一定的p ′下，各向异性固结下的S _u高于各向同性固结下的S _u。此外，样品在较高的η各向异性地固结到相同的p ′与较低的η相比，S _u增加。邓肯-张模型可以用来表征在各种固结应力路径下再生粘土的强度行为。在不同的η下，c或c '的变化微不足道，表明η对内聚力的影响可以忽略。φ随η线性增加，而φ '则无明显变化。