摘要
将一维应力波理论运用于预制桩受力分析及施工成桩中。通过建立锤击模型和应变分析,来获得预制桩应力传导规律;并结合工程实例分析了基于高应变波动的预制桩应力传导特性,引入摩擦阻抗,提出在高应变状态下,分析摩擦阻抗对于预制桩的描述至关重要;在应力波传导上,分析了透射波和反射波共存的受力状态为预制桩真实受力工况,并结合理论描述了外力作用下的上行波和下行波两种波形对锤击沉桩速度和摩擦阻抗均有影响,其作用不可忽略。本文的研究对于工程施工与设计环节均有参考价值,同时可为高应变分析提供理论思路。
The one-dimensional stress wave theory is applied to the force analysis and construction of precast piles.Through the establishment of hammering model and strain analysis,the law of stress transmission of prefabricated piles is obtained;combined with engineering examples,the stress transmission characteristics of prefabricated piles based on high strain fluctuations are analyzed,and friction impedance is introduced.The description of the pile is very important;in terms of stress wave conduction,the stress state in which the transmitted wave and the reflected wave coexist is analyzed as the real stress condition of the prefabricated pile,and the upward wave and the downward wave under the action of external force are described in combination with the theory.The waveform has an influence on the hammering speed and frictional resistance,and its effect cannot be ignored.The research in this paper has reference value for engineering construction and design,and can also provide theoretical ideas for high-strain analysis.
作者
夏永豪
杨开放
孙春辉
杨荣
王杰
Xia Yonghao;Yang Kaifang;Sun Chunhui;Yang Rong;Wang Jie(Powerchina Roadbridge Group Co.,Ltd.,Beijing 100048,China)
出处
《科学技术创新》
2022年第20期78-81,共4页
Scientific and Technological Innovation
关键词
高应变
波动理论
预制桩
应力传导
High strain
Wave theory
Prefabricated pile
Stress transmission
