扩底桩群桩横向受荷承载性能研究

Research on the lateral load bearing capacity of pile groups with belled piles

本文基于扩底群桩横向受力室内模型试验加载结果,结合有限元软件Midas GTS NX建立扩底群桩数值模型,通过数据分析,研究直桩与扩底桩不同的排列组合时,群桩所达到的最优承载效果,分析不同的桩长、桩间距等影响因素对群桩横向承载特性的影响规律。本文的研究成果补充完善扩底桩在横向加载作用下的受力承载变形机理,对扩底桩基础的应用及发展提供有利支撑依据。

In this paper, the numerical calculation model of the belled pile group is established with the finite element software Midas GTS NX. The model is based on the test results of the internal model test of the lateral force of the belled pile group. In different arrangements way, the optimal load-bearing effect of the group piles is achieved based on analyzing test data in this paper. It has also been studied in this research to exposit the influence of different pile length and pile spacing on the lateral bearing behavior of the piles.Research results of my paper make up and complete the defroamtion mechanism of force bearing when belled pile under the impact of transverse load. At the same time, they will provide a solid evidence for application and development of pedestal pile foundation.