我国岩溶分布广泛,不可避免地在高速公路修建过程中会遇到岩溶地区。在桥梁建设中,桩基础被越来越多的应用到实际工程中,当桩基础碰到岩溶地区时,溶洞的存在使得桩基的承载能力受到影响,竖向变形变得难于控制,变形过大会影响桩端岩溶顶板的稳定性,可能造成溶洞坍塌,有损桥梁质量。本文结合实际工程进行研究,对溶岩地区桥梁桩基的设计进行分析研究。 Karst is widely distributed in our country and will inevitably encounter karst areas in the process of highway construction. In the bridge construction, the pile foundation is more and more applied to the actual project. When the pile foundation hits the karst area, the existence of the cave makes the bearing capacity of the pile foundation affected, the vertical deformation becomes difficult to control and the deformation The impact of the assembly on the stability of pile top karst roof may cause cave collapse, detrimental to bridge quality. Based on the actual project, this paper analyzes the design of bridge pile foundation in the area of ​​lava.