某上行特大桥T构支架基础沉降分析及优化设计

Foundation Settlement Evaluation and Design of a Supporting Structure for a Large Span Bridge Foundation

城际铁路要求轨道结构具有持久稳定的平顺性,对线下工程的沉降提出了严格的要求。桥梁占线路的比重大,且几乎都为桩基础,因此控制桥梁桩基沉降成为城际铁路设计和施工的关键性问题之一。结合武黄城际铁路某上行特大桥T构支架法施工,探讨了支架承台管桩基础的沉降量和各段沉降差。通过对现有墩梁式支架方案管桩基础沉降进行分析,提出了支架承台基础改进建议,以及具体的优化方案,为类似工程的设计与施工提供了参考依据。

This paper presents a case history of the foundation construction of the supporting structure for a T-Girder railway bridge.The settlement of the pipe pile supported pile caps are investigated.The pile settlement at bridge piers are analyzed and the improvement measures are proposed.