南水北调东线睢宁二站主站身结构内力分析

Structure inner force analysis of main station for Suining pump station Ⅱ on East Route of South-to-North Water Transfer Project

睢宁二站是南水北调东线第五级泵站，是以调水为主，兼有农业灌溉、航运、排涝和防洪等综合性能的大型泵站，是沿线建筑物中地震烈度最高、扬程最高、基坑最深、单块底板面积较大的泵站。简述了主站身的总体布置、结构计算单元划分，着重阐述了根据结构力学计算理论，通过二维拟静力法采用远盛软件“弹性地基上框架结构”模型进行受力计算，在多个工况下对内力进行包络，并与三维动力分析法进行对比分析。该泵站计算方法对类似工程具有一定的参考价值。

Suining pump station Ⅱ is the fifth stage lift water cascade station along the Eastern Route of South-North Water Transfers. The project is a comprehensive hydropower project,making water diversion as its main purpose and combining flood drainage and shipping together. It is the pump station with highest earthquake intensity, highest lift, most deep foundation pit, larger block of single floor area along the buildings. This paper describes the general layout design and calculation-unit division, and mainly illustrates calculational method of the force acting on the frame structures on elastic foundations model which are applied on Yuansheng software according to structure mechanics and pseudo-static method. The paper analyses internal force envelope in multi-operating conditions and three dimensional dynamic comparative result. The analysis can be a reference to the structural reinforced design in the similar type of large-scale block-based pumping stations.