新型锚块在预应力闸墩设计中的研究与应用

Study on New Anchor Block in the Design of Pre-stressed Pier

蒲石河抽水蓄能电站下水库泄洪排沙闸工作闸门单墩承受最大推力为34 000 kN,推力较大,预应力闸墩采用空腔式新型锚块可以有效降低吨锚比,改善结构应力条件,节省工程量。应用ANSYS有限元分析程序对预应力闸墩进行数字仿真模拟,确定锚块及空腔尺寸、锚束位置及吨位,并通过物理力学模型试验,对重要部位进行应力检测,验证数学模型结果的可靠性。

The single pier of flood discharging and sand gate in the lower reservoir of Pushihe Pmnped-storage Power Station will bear a maximum thrust of 34 000 kN. The pre-stressed pier adopts a new hollow anchor block which can effectively reduce the ratio of anchor beam capacity to thrust, improve the structural stress and reduce the constructing quantity. The numerical simulation for pre-stressed pier is conducted by using ANSYS to determine the sizes of anchor block and cavity, and the anchor beam position and capacity. The physical model testes are also conducted to examine the stress of important positions and to verify the reliability of mathematical model results.