摘要
分析了刚性单桩桩复合地基的荷载传递机制,针对单桩复合地基中桩、土、垫层相互作用特点,基于荷载传递法,通过简化桩土单元体竖向相对位移分布模式,引入弹塑性荷载传递模型,并考虑桩体的上刺与下刺变形,建立了刚性单桩复合地基沉降计算的基本微分方程,进而提出了一种新的能考虑桩-土-垫层体系共同作用的单桩复合地基沉降计算方法.结合现场单桩复合地基静载荷试验进行对比分析,结果表明,所建立沉降计算方法的计算结果与实测值吻合较好,且该方法计算工作量小,可为工程计算提供一定的参考.
The paper analyzes the load transfer mechanism of rigid single pile composite foundation, considering the characteristics of the interaction among pile, soil and bedding course. According to the assumption and the simplified distribution mode about thevertical displacement of pile-soil element,an elastoplastie load transfer model is introduced. And considering both upward and downward penetration displacements of piles, an basic differential equation of settlement calculation of rigid single pile composite foundation is established based on load transfer method. Then, a new method for calculating the settlement of rigid single pile composite foundation is developed. This new method is applied to analyze an experiment,and the results show that the calculated results are consistent with the real values. This method can decrease the cost of calculation and provide certain reference to the practical engineering.
出处
《河南科学》
2013年第8期1213-1218,共6页
Henan Science
基金
国家自然科学基金项目资助(50978235)
关键词
刚性单桩
复合地基
沉降计算
rigid single pile
composite foundation
settlement calculation
