上海软土小应变刚度的高精度试验研究

Study on High-precision Experiment of Small Strain Rigidity of Soft Soil in Shanghai

通过对土体小应变研究这一热点问题进行了简要的概述,指出土体小应变特性对岩土工程的重要性。通过高精度的三轴试验装置,完整地测试了上海软粘土在典型应力路径条件下的土体小应变刚度曲线,表明上海软土具有明显的小应变特性。其研究意义在于为上海等软土地区城市地铁基坑、隧道工程和桩基工程的变形分析参数的进一步合理选取提供了一定依据。

The article briefly describes the study on the small strain of soil,and points out the importance of small strain characteristic of soil on the geotechnical engineering.The high-precision three-triaxial test apparatus is used to completely test the small strain rigidity curve of soft clay in Shanghai under the condition of typical stress path,and shows that the soft soil of Shanghai has the obvious characteristic of small strain.The study signification is at providing certain basis for further reasonably selecting the deformation analysis parameters of urban subway pit,tunnel engineering and pile foundation engineering of the soft soil regions in Shanghai and etc.