岩溶地区桥梁桩基选择及承载力计算研究

Study on Optimization of Bridge Pile Foundation and Bearing Capacity in Karst Area

岩溶在中国分布非常广泛,作为一种典型的不良地质现象,对工程建设危害极大。然而在很多基础建设过程中,在岩溶区修建桥梁、公路在所难免。结合武咸公路改造工程实际,在分析现场工程地质条件的基础上,对岩溶区桥梁桩基形式进行选择,并针对摩擦桩和端承桩桩基承载力进行计算研究。根据计算结果选择合理桩型,提出端承桩持力层安全厚度,计算结果对类似工程具有一定的参考价值。

Karst is a typical adverse geological phenomenon,which is widely distributed in China,and it is very dangerous for construction.But in many casic constructions,it is not avoided in karst areas to build bridge or highway.Combining with Wuxian highway rebuilding engineering,based on the analysis of engineering geological conditions,the type of bridge pile foundation is selected and the carrying capacity of friction pile and end-bearing pile is calculated and studied.According the results to select the proper type of bridge pile foundation,and the paper brings forward the safe thickness of end-bearing pile bearing stratum.The results provide reference for the future similar engineering.