沉入式大圆筒外壁静止土压力计算方法的研究  

Research on the Computing Method of Static Outer Earth Pressure of Buried Large-diameter Cylinder

作　　者：竺存宏[1] 

机构地区：[1]天津市五洋交通工程科技开发有限公司,天津300456

出　　处：《港工技术》2003年第4期20-23,共4页Port Engineering Technology

基　　金："九五"国家重点科技项目 (攻关 )计划 ( 96-4 15 -0 1-0 2 )

摘　　要：通过理论分析指出了筒外壁曲面对土压力分布的影响 ,在土压力计算中引入形状系数的概念 ,并提出了圆筒的形状系数与筒径关系的经验计算式。指出了边筒的存在影响圆筒外壁土压力分布的机理为筒与筒连接部位凹入部分土体形成的土拱 ,土拱影响的范围与筒外径大小有关。Based on theoreetical analyses,the influence of outer surface of the cylinder on the earth pressure distribution is disculssed.A shape factor is introduced in computing earth pressure and the empirical formula concerned with relationship between the shape factor and the cylinder diameter is also provided.It is further pointed out that the mechanism of lateral cylinder affects the outer earth pressure of the large cylinder through the soil arch formed at the concave between the two cylinders.The extent of the influence of this arch is related to the outer diameter of the cylinder.In addition,new methods are provided for calculating circular and axial earth pressures on the outer wall of the cylinder.

关 键 词：沉入式圆筒 静止土压力 土压力分布 土压力计算 形状系数 土拱 

分 类 号：TU333[建筑科学—结构工程] TU432