钱塘江排桩式丁坝在涌潮作用下的受力分析

Analysis of the Internal Force of the Pile-Groin under the Tide in Qiantangjiang River

排桩式丁坝是一种新型的水工结构,利用弹性地基梁法和自编的有限元程序计算分析了涌潮作用下的钱塘江排桩式丁坝的内力,研究分析了排桩式丁坝在涌潮作用下的受力机理。前排桩和后排桩的受荷模型不同、刚度不同,导致其桩身内力不同。理论计算和现场测试结果的对比表明,可参考基坑围护工程中的排桩设计理论指导钱塘江排桩式丁坝的设计,并建议采用假定条件较少的有限元法计算分析,使结果更加科学合理,符合实际情况。

The pile-groin is a new type hydro-structure. Based on the result of elastic foundation beam method and FEM method, the mechanics of the piles in the groin is studied. The differences of the loading model and stiffness between the front piles and the back piles are the reasons for the differences of the bending moment between the front and back piles. In the engineering, the theory used in the analysis of foundation ditch exterior-protected double piles can be referenced for the design of the pile-groin, and the FEM method is suggested to apply., which requires less assumed conditions.