预制桩打桩过程模拟算法  

Study on simulation and arithmetic of PHC pile

作　　者：李廷[1,2] 徐振华[3] 罗俊[2] 

机构地区：[1]中南大学信息物理工程学院,湖南长沙410083 [2]广东省建筑科学研究院地基基础研究所,广东广州510500 [3]广州仲恺农业技术学院城市建设学院,广东广州510500

出　　处：《公路工程》2010年第5期75-81,共7页Highway Engineering

摘　　要：通过对现有方法的分析与比较,针对目前基桩高应变动力试桩技术中对预制桩沉桩过程模拟及其承载力预测的不足,基于锤—桩—土动力响应理论的相关研究成果,首次采用改进的连续杆件模型与优化的离散质弹模型相结合的方法对柴油锤打桩过程进行模拟试验研究并编制了相应程序软件。不仅可以模拟实际打桩过程中锤、桩、土的相互作用,更重要的是用数值模拟的方法实现一个系统包含两种模型,发挥不同模型的优势,将两种模型进行良性衔接的解决方案。解决了目前纯数值解析算法无法精确模拟实际打桩过程这一难题。A numerical model and its software for analyzing the simulation of driving process with forecast of bearing capacity of PHC pile in high strain dynamic testing which combined the improved continuous pole and optimized scattered mass-spring models.The optimized design method for PHC pile is put forward in this paper.The interaction among pile,soil and hammer during the driving process and rationality for selected pile and driving system are simulated to determine the initial design plan firstly.Then driving and monitoring tested pile are carried through to validate or adjust the parameters of pile,soil and diesel hammer system in the initial design plan.Such design idea of PHC pile is closely link to driving process.That makes the design much more accord with practical mechanical behavior in the pile and soil and breaks through the current design principle with major static analysis.

关 键 词：预制桩 打桩过程模拟 应力波理论 高应变测试 

分 类 号：TU473.11[建筑科学—结构工程]