岩溶-陡坡作用下秦岭山区高速公路桥梁桩基竖向承载力研究  

A Study on Vertical Bearing Capacity of Bridge Pile Foundations in Qinling Mountains Expressway Under Karst and Steep Slope Effect

作　　者：成圆梦 CHENG Yuan-meng(College of Urban and Rural Planning and Construction Engineering,Shangluo University,Shangluo726000,Shaanxi)

机构地区：[1]商洛学院城乡规划与建筑工程学院,陕西商洛726000

出　　处：《商洛学院学报》2024年第4期11-17,共7页Journal of Shangluo University

基　　金：商洛学院科研基金项目(23HKY115)。

摘　　要：为探究岩溶顶板厚度和陡坡对高速公路桥梁桩基竖向承载力的影响,依托秦岭山区某高速公路工程,构建三维数值仿真模型,分析单一因素和双重因素交互作用下桩基极限承载力,提出了适用于岩溶发育区桩基极限承载力计算的经验公式。结果表明,顶板厚度与桩基承载力呈正线性相关,陡坡与桩基承载力呈负线性相关,二者交互作用结果与桩基承载力呈正相关,这两种因素对桩基承载力的影响程度为顶板厚度大于陡坡。In order to investigate the influence of karst roof thickness and steep slope on the vertical bearing capacity of pile foundations of expressway Bridges,based on a highway project in Qinling Mountains,a three-dimensional numerical simulation model was constructed.The ultimate bearing capacity of pile foundations under the interaction of single and double factors was analyzed,and an empirical formula for the calculation of ultimate bearing capacity of pile foundations in karst areas was proposed.The results showed that the roof thickness had a positive linear correlation with the bearing capacity of pile foundation,and the steep slope had a negative linear correlation with the bearing capacity of pile foundation.The interaction results of the two factors had a positive correlation with the bearing capacity of pile foundation,and the influence degree of these two factors was that the roof thickness was greater than the steep slope.

关 键 词：秦岭岩溶发育区 公路桥梁桩基础 竖向极限承载力 

分 类 号：U443.15[建筑科学—桥梁与隧道工程]