双(多)排桩基坑支护结构受力性能研究与工程实践

Research and Engineering Practice on Mechanical Properties of Double(Multiple)Row Pile Foundation Pit Support Structure

双(多)排支护桩由于具有抗侧移刚度大、场地适用性强和方便施工等特点近年来在基坑工程上得到广泛应用。文章根据多排桩支护结构在挠曲微分方程的基础上得出的各点变形及内力方程,带竖向锚索多排桩支护结构预应力大小及施加竖向锚索的时间对支护结构的影响,考虑支护桩在桩身支护参数变化下对支护结构的内力位移的影响等研究结论,结合多个基坑支护工程项目的实践情况,总结了双(多)排桩的支护效果,验证了理论研究成果的可靠性,可为类似问题的理论研究和工程实践提供参考。

Double(multiple)row support pile has been widely used in foundation pit engineering in recent years due to its characteristics of large lateral displacement stiffness,strong site applicability and convenient construction.Based on the multiple row pile retaining structure in the deflection differential equation of deformation and internal force at every point on the basis of the equation,the influence of the prestress of the multi-row pile supporting structure with vertical anchor cables and the time of applying the vertical anchor cables on the supporting structure,and considering the influence of supporting pile on the internal force and displacement of supporting structure under the change of pile supporting parameters,etc,combined with the practice of multiple foundation pit supporting project,summarizes the double(multiple)pile supporting effect,test and verify the reliability of the theoretical research results,can be used as theoretical research and engineering practice of similar problems to provide the reference.