摘要
以西部红层软岩地区渝邻高速公路I合同段林家湾大桥的1号桥墩扩大基础为例,通过有限元数值计算,分析了实际工程中桥梁扩大基础下红层软岩地基受基础传来的竖向力、水平力和弯矩复合荷载作用下的强度变形受力特性。分析结果表明,红层软岩地基沉降值较小,故一般均能满足JTJ024-85《公路桥涵地基与基础设计规范》要求,而桥梁扩大基础受基顶水平力及弯矩荷载影响较大,在基础底面尺寸设计的时候应充分考虑这一影响,使基底最大反力满足红层软岩地基承载力的要求。
Take an example of strength and deformation property of red stratum soft rock foundation subjected compound load of vertical force,horizontal force and moment, an extended foundation of Linjiawan bridge No. 1 pier of Yulin expressway I contract part in western region of China is analyzed by finite element method. Analysis results show that settlement of red stratum soft rock is rather small and can generally fit the requirement of Chinese code of footing and foundation design of highway bridge and culvert （ JTJ024 - 85）, but influence of horizontal force and moment which act on the top of bridge extended foundation is relatively great. So this should be well concerned when design the bottom size of foundation and make the maximum reacting force on the bottom of extended foundation fit the requirement of red stratum soft rock bearing capacity.
出处
《四川建筑科学研究》
北大核心
2009年第6期118-121,共4页
Sichuan Building Science
关键词
西部红层软岩地区
桥梁扩大基础
竖向力
水平力和弯矩复合荷载作用
有限元法
JTJ024—85《公路桥涵地基与基础设计规范》
red stratum soft rock region in western China
extended foundation of bridge
action of compound load of vertical force
horizontal force and moment
finite element method
Chinese code of footing and foundation design of highway bridge and culvert （ JTJ024 - 85 ）
