摘要
为确保打入式预制桩的成桩质量和提高打桩效率,运用一维应力波传播理论,分析了锤-桩-土系统相互作用机理,建立了动力打桩简化模型.系统分析了各因素(锤重,落高,桩垫刚度、厚度,桩帽重量)对冲击力、持续时间、贯入度的影响.根据沉桩曲线,应用波动方程法对打桩系统各部分进行优化配置.工程实例研究表明,模拟结果与工程实际相吻合.
In order to guarantee the quality of driven pile and increase the efficiency of pile driving, one dimensional stress wave theory is adopted to analye the interaction mechanism of the system of hammer-pile-soil and establish the simplified model of dynamic pile driving, and analytical solution of penetration is presented in the thesis. It can quantitatively analyze affection of impact force, force duration time and penetration by some parameters including weight and drop height of the hammer mass, stiffness and thickness of cushion, and weight of cap cushion. According to curves of driving pile, the wave equation method is used to select optimum pile driving hammers and components of pile driving system. The Case studies indicate that estimated values are well consistent with measured one, which proves that the method is precise and effective. This method can provide valuable reference for optimum design and construction of pile foundation.
出处
《广东工业大学学报》
CAS
2007年第4期83-88,共6页
Journal of Guangdong University of Technology
基金
广东省重点学科建设基金资助项目
关键词
波动理论
桩基工程
打桩系统
stress wave theory
pile foundation
pile driving system
