埋地复合材料泵站井受力分析研究

STUDY ON THE FORCE ANALYSIS OF THE BURIED COMPOSITE PUMPING WELL

介绍了一种采用玻璃纤维增强塑料(也称玻璃钢)结构替代混凝土、砖砌结构的新型复合材料泵站井。在理论分析的基础上,对直径为3 m的玻璃钢泵站井进行了强度、刚度及稳定性的有限元分析。结果表明:埋地玻璃钢泵站井环向应力理论分析与有限元分析结果基本吻合,可作为井壁厚度设计的依据;轴向应力理论分析没有考虑加强筋的影响,理论分析与有限元分析误差较大,但其值较小,可不作为井壁厚度设计的控制因素;最小稳定安全系数与加强筋的截面有关,增大加强筋的高度可有效提高泵站井的整体稳定性。

This paper introduces a new type of composite pumping station wells,which uses glass fiber reinforced plastic（ also called glass steel structure） instead of pumping station with concrete,brick masonry structure.Based on the theoretical analysis,the strength,stiffness and stability of the glass fiber reinforced plastic pump well with 3 meters diameter are analyzed by finite element method. The results show the hoop stress of the buried FRP pumping station analyzed by finite element software fits with the theoretical analysis nicely,which can be used as a basis for thickness design of the wall. The axial stress analysis by finite element software results in big difference from the theoretical analysis for the latter didn＇t consider the influence of rib reinforcement. While the value is relatively small,thus it is not considered as the controlling factor for thickness design of the wall. The minimum safety factor of stability is related to the section of rib reinforcement,and enlarging the height of rib reinforcement can improve the global stability of the pumping station effectively.