上海地区软粘土的卸荷—再加荷变形特性

上海地区软粘土的卸荷—再加荷变形特性 English Version

摘要: 计算深基础开挖回弹及再加荷时的沉降在设计中是一个有待于探讨研究的重要课题,本文着重分析了上海软粘土在卸荷—再加荷时的变形特性,提出了估算回弹及全补偿沉降的计算式,并探讨了三轴试验条件下土样的卸荷—再加荷变形特性,建立了相应的应力-应变模型。
- 再加荷 /
- 变形特性 /
- 软粘土 /
- 上海地区 /
- 不排水抗剪强度 /
- 再压缩 /
- 回弹应变 /
- 全补偿 /
- 上覆压力 /
- 深基础
Abstract: The settlement of deep foundation due to the excavation and reloading is an important subject in engineering design, which is worthy to be investigated. In the present paper, the major efforts have been made to study the deformation characteris- tics of soft clay subjected to unloading and reloading in Shanghai. Calculation method is proposed for evaluating the rebound and the compensated settlement displacements of the clay. The examination of the deformation characteristics of the clay under unloading and reloading Is performed on the basis of triaxial shear test, and the correspanding stress-strain models are also developed.