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在桥梁拓宽改造工程中,必然涉及新建桥梁和原有桥梁基础差异沉降及桥面板的开裂等问题。拓宽设计方案采用桥梁下部结构分离、上部边梁现浇连接的方式进行拼接,桥墩和桥台拓宽部分均采用单排桩整体式承台形式。通过实测数据分析软土地区摩擦型桩沉降特征,并采用数值模拟和理论分析研究桩基沉降计算方法和控制技术,对新旧桥梁桩基设计计算提出了建设性意见和方法措施。
In the bridge widening renovation project, inevitably involves the new bridge and the original bridge foundation differential settlement and deck cracking and other issues. Broaden the design of the bridge structure using the lower part of the upper beam pouring connection way to splicing, piers and bridge widening part of the single-row piles are used in the form of a single cap. Based on the measured data, the settlement characteristics of the friction pile in the soft soil area are analyzed. The calculation and control technology of pile settlement are studied by numerical simulation and theoretical analysis. The constructive suggestions and measures are put forward for the design calculation of the pile foundation.