结构改进法在悬臂长深调压井中结构分析研究

Application of Improved Method of Structural Mechanics in Long Cantilever Deep Surge Shaft Structure Analysis

针对调压井结构向体型巨大化、地质条件多样化、受力条件复杂化发展的方向,通过建立变形协调方程、对传统结构力学改进形成结构改进法,并与有限元法、传统结构力学法计算结果进行对比,研究表明结构改进法计算结果与传统结构力学、有限元法计算的调压井内力分布规律基本一致,且结构改进法更易于手工计算、方便快捷,结果误差在5%以内,可满足结构设计需要,从总体分析可知结构改进法切实可行。对于下部埋置于岩土中、上部悬臂的调压井结构进行分析研究,给出了相应的计算改进思路,可为以后此种体型的设计提供新的计算方法。

The development of the surge shaft structure has to accommodate with huge volumes, complex geological conditions, and complicated stress conditions. Through the establishment of the de- formation coordination equation, and the improvement of the traditional structural mechanics, a structure improvement method was proposed and the calculation result was compared with the finite element method and the traditional method of structural mechanics. The results showed that the surge shaft and the inter- nal force distribution results from the structure improved method, the finite element and the traditional structure were consistent; in addition, the fast and convenient structure improvement method was more suitable for manual calculations. The calculation error was within 5%, which satisfied the structure de- sign need. The overall analysis showed that the structure improved method was feasible. For surge shafts when the lower part of the structure was embedded, the upper cantilever was analyzed, and the corre- sponding calculation improvement ideas were provided for future designs.