双排钢板桩围堰受力与计算方法研究

Study on Stress and Calculation Method of Double-row Steel Sheet Pile Cofferdam

双排钢板桩围堰具有占地面积小、施打及拆除方便、对河道水质影响小等优点,在挡水高度不太高的情况下相对于传统土石围堰具有明显的优势,在全国各地水利项目施工导截流期间得到了广泛的使用。但由于仅作为临时结构,常常根据经验进行设计,对于该种结构的内力计算也缺乏研究。若要得到准确的结构内力,需用有限元法进行分析,无法满足广大设计人员的现实需求。在对该种结构型式受力分析的基础上,利用传统土压力理论及m法推算出双排钢板桩围堰的计算等式,并通过与有限元计算方法的比较验证计算结果。

The double-row steel sheet pile cofferdam has the advantages of small floor area, convenient construction and demolition, and little impact on river water quality. It has obvious advantages over the traditional earth rock cofferdam when the water retaining height is not too high. It has been widely used during the diversion and interception of water conservancy projects all over the country. However, because it is only a temporary structure, it is often designed according to experience, and there is a lack of research on the internal force calculation of this kind of structure. In order to obtain the accurate internal force of the structure, the finite element method needs to be used for analysis, which cannot meet the practical needs of the majority of designers. On the basis of the stress analysis of this type of structure, the calculation equation of double-row steel sheet pile cofferdam is calculated by using the traditional earth pressure theory and m method, and the calculation results are verified by comparing with the finite element calculation method.