作　　者： ; ; ;

机构地区： 广东省水利水电科学研究院

出　　处： 《工程建设与设计》 2019年第13期71-76,共6页

摘　　要： 随着城市建设的发展,工程建设中经常出现不同工程交叉影响的项目,但目前尚没有规范统一的影响评价方法。论文以广州市南沙区某堤防加高对既有城市公路桥梁桩基的影响分析为例,采用了弹性支点法和有限元Midas/GTS软件就填土加高对桥梁桩基的内力和变形的影响进行了研究分析。分析过程中考虑了搅拌桩对软土的地基处理和墩柱与桥跨结构之间的连接结构,计算了因填土加高产生沉降对桥梁桩基的负摩阻力,验算了桩基的竖向承载力。分析结果表明,堤防加高对桥梁结构的影响都在容许范围内。以期可为类似项目的相互影响分析提供参考和借鉴。 With the development of urban construction,there are often projects with different engineering cross-influences in engineering construction,but there is no standardized and unified impact assessment method.This paper analyzes the impact of embankment heightening on pile foundation of existing urban highway bridge by taking a project in Nansha district of Guangzhou for example,the internal force and deformation of existing bridges'pile foundation caused by embankment heightening are studied and analyzed by using the elastic support method and finite element software as Midas/GTS.In the process of analysis,the foundation treatment of the soft soil by the mixing pile and the connection structure between the pier column and the bridge structure are considered.The negative friction to the bridge pile foundation caused by settlement of fill heightening is calculated,and the vertical bearing capacity of pile is also checked.The analysis results show that the impact of embankment heightening on the bridge structure is within the allowable range.The analysis method of this paper can provide reference for the interaction analysis of similar projects.

关 键 词： 堤防工程 箱梁桥 墩柱 桩基 负摩阻力

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