摘要
侧向堆载使桥梁桩基及墩台产生横向水平位移,严重影响线路的稳定性和安全性。采用ABAQUS软件建立有限元分析模型,针对一具体工程堆载条件下桩基及墩台应力、变形情况进行分析。结果表明:在本文计算条件下,11.5 m高度的堆载引起桩基竖向沉降和横向水平位移,承台竖向沉降9~17 mm,承台水平位移41~43 mm,桩基水平位移最大值为46 mm,发生在距原地面5 m深处;靠近堆土侧的墩顶水平位移21.6 mm;远离堆土侧的墩顶水平位移40.6 mm,超过规范限值,应尽快采取卸载等措施。
The lateral heaped load causes transverse horizontal displacement of bridge pile foundation,pier and platform,which will seriously affect the stability and security of the railway line. A finite element analysis model was established by ABAQU S software,and the stress and deformation of pile foundation,pier and platformwere analyzed under a specific engineering heaped load condition. The results showed that under the calculation conditions of this paper,the lateral heaped load of 11. 5 mhigh soil caused vertical settlement and horizontal displacement of pile foundation. The vertical settlement of platformwas 9 ~ 17 mm,and the horizontal displacement of platformwas 41 ~43 mm. The maximumhorizontal displacement of bridge pile foundation was 46 mm,at the location 5 mfromthe original ground. The pier top horizontal displacement near the heaped side was 21. 6 mm,and that away fromthe heaped side was 40. 6 mm,which exceeded the specification limit. M easures such as unloading should be taken as soon as possible.
出处
《铁道建筑》
北大核心
2017年第5期7-9,共3页
Railway Engineering
基金
国家自然科学青年基金(51608533)
中国铁路总公司科技研究开发计划(2015G002-H)
关键词
铁路桥梁
侧向堆载
桥梁桩基
有限元分析
水平位移
沉降
Railway bridge
Lateral heaped load
Bridge pile foundation
Finite element analysis
Horizontal displacement
Subsidence
