二级坝泵站主厂房混凝土整体结构设计

为了解决深埋于地下的大型泵站主厂房采用分缝结构存在的侧向稳定和缝内止水渗漏问题,南水北调东线一期工程二级坝泵站主厂房结构采用了不分缝的整体结构。对分缝方案和整体结构方案进行了有限元分析计算,并对整体结构方案进行了底板温度应力分析计算,计算结果表明:整体结构方案具有受力合理、应力水平低、结构沉降均匀且较小、侧向稳定能自身平衡、工程投资较省等优点。二级坝泵站主厂房主体结构完工后经历了两个完整冬季,底板未发现可见混凝土裂缝,其他部位未见有害贯穿性裂缝。

Overall structural design of concrete for power house of Erjiba Pumping Station

To solve the problem of lateral stability and sealing leakage of the power house of deep,buried,large pumping stations with a parting structure,the power house of the Erjiba Pumping Station of the Eastern Route Project of South-to-North Water Diversion adopts the overall structure without the parting structure.The schemes of the parting structure and overall structure were analyzed and calculated by means of the finite element method.The temperature stress on the bottom plate for the latter scheme was analyzed.The calculated results show that the scheme of the overall structure has advantages such as a rational force,a low stress level,uniform and small settlement,lateral stability and self-balance,and economical project investment.The power house of the Erjiba Pumping Station has undergone two compete winters after the completion of the main structure,and neither visible concrete cracks on the bottom plate nor harmful penetrated cracks on other locations have been found.