文档介绍：邻近匝道对桥梁桩基偏位影响分析及病害处治对策
摘要:本文以某实际工程为例,研究了邻近匝道对桥梁桩基偏位的影响。分析从有限元方法和数值解法两个角度出发,着重研究了被动桩与软弱土体之间的作用机理。综合考虑病害桥墩倾斜严重、盆式支座偏位较大的成因,研究由邻近匝道作用引起的桥梁病害的处治对策。
关键词:桥梁病害;桩基偏位;处治对策
中图分类号:K928文献标识码: A
Analysis of the effect of adjacent ramp on bridge pile foundation and relevant countermeasures
Lv chenggang 2Yang peng 1
(1. Jiangsu Yangtze pany Ltd. 2. School of transportation, Southeast University)
Abstract: This paper takes a practical project as an example, expatiate the effect of adjacent ramp on bridge pile foundation. From two aspects of finite element method and numerical method, the paper focuses on the research of the mechanism of action between passive piles and soft soil. Considering the serious disease of pier tilt and large deviation of pot bearing, the paper will analysis the treatment measures of bridge dieases caused by soft soil foundation.
Key words: Bridge Disease; Pile foundation deviation;;Treatment measures.
1 工程背景
结构概况
某互通内设有B、E、F、I、J、M、N、共九条匝道,均为单向道匝道;被交道沿江高速全长1700m。本互通采用变异半直连+半苜蓿叶型枢纽互通,主线设计速度120km/h,被交道沿江高速设计车速120km/h,匝道设计速度40-60km/h。
该桥上部结构为(3×20)+(4×20)+(3×24+36+)+(4×21)+(3×)+(3×25)+(4×20)+(4×20)+(+++20)+(5×)+((++)+(3×20)+(3×20)+(3×
20)m14联。其中第3、6、9、11联为现浇预应力混凝土箱型结构,,。余下几联均为钢筋混凝土现浇箱梁,。桥梁下部结构采用四柱、三柱、双柱式混凝土墩,钻孔灌注桩基础;桥台采用肋板式桥台,钻孔灌注桩基础。采用满堂支架现浇方法施工。
2013年12月,检测