沉入式大圆筒有关理论问题的探讨

Investigation on Theoretical Issues of Buried Large-diameter Cylinder

通过试验研究及理论分析 ,从受力机理对沉入式大圆筒作了定义 :对沉入式大圆筒的试验方法提出了新途径 ;阐明了筒内土体的抗倾机理及抗倾模式 ;提出了描述筒内、外土体压力的特征参数 ;地基抗倾折减系数的力学概念 ;筒的沉入深度与筒底持力层土性的关系及提高沉入式大圆筒稳定性措施等有关理论 。

Based on experimental and theoretical analyses,the concept of buried large-diameter cylinder is defined in terms of its loading mechanism.A new way of conducting buried large-diameter cylinder experiments is introduced.The anti-inclination mechanism and mode of the inside soil of cylinder are explained.Furthermore,several other issues are also discussed,such as characteristic parameters for describing the inner and outer pressure of the cylinder,mechanic concept of the antiinclination reduction factor of the foundation,the relation between the buried depth and characteristics of soil at the bottom sustaining-layer,and the mechanism to increase the stability of buried largediameter cylinder.These investigations will provide the direction for further research.