高水头混合式闸室墙衬砌锚筋的计算方法

针对高水头混合式闸室墙结构设计领域,以柳江红花水利枢纽复线船闸闸室墙为例,结合ADINA有限元模型分析,进行锚筋计算方法的研究。通过分析,锚筋受拉过程轴向变形u与距前趾的垂向距离L_i近似成正比关系,利用u与L_i的关系,通过假定建立锚筋轴向拉力F_i与L_i及锚筋产生的力矩M_i与L_i的公式关系。为满足闸室墙检修工况下抗倾覆稳定性要求,结合锚筋提供的弯矩值Mi反推拉力值Fi,锚筋提供的拉力值均满足设计与使用要求,且越靠近顶排,锚筋发挥作用越大。通过与现有传统锚筋计算方法进行对比,该计算方法相对合理、准确,更加节省工程投资。

Calculation method of lining anchor for high-head mixed chamber wall

According to the current design field of high-head mixed chamber structure,taking the chamber wall of Liujiang Honghua Water Conservancy project as an example,we study the calculation method of anchor bar by combining with the finite element model of ADINA.The axial deformation of the anchor bar during tension is approximately proportional to the distance from the toe through the analysis of the ADINA finite element model,and we establish formula relation among axial tension of anchor bar,moment of anchor bar and the distance from the toe by the relationship between the axial deformation and the distance from the toe.To meet the requirement of stability against overturning in the chamber wall maintenance condition,according to the moment value of anchor bar,we derive the tension value.The tensile value of the anchor bar meets the design and application requirements,and the role of anchor bar becomes greater with the closer of the top row.The calculation method is relatively reasonable,accurate and more economical by comparing with existing methods of traditional anchor reinforcement.