排桩复合土钉支护结构水平位移简化计算方法

Simplified calculation method of horizontal displacement of row piles and soil nailing composite supporting structure

针对排桩复合土钉支护结构,基于其受力变形机理,引入了土钉钉头与排桩在相应位置处变形协调的基本假定,考虑了分步开挖施工工况,采用增量法建立了考虑施工过程影响的排桩复合土钉支护结构水平位移简化计算方法。算例及工程实例计算的对比分析表明,所建立的排桩复合土钉支护结构水平位移简化计算方法具有工程适用性。

For the row piles and soil nailing composite supporting structure,a simplified calculation method of the horizontal displacement of the structure considering the influence of the construction process was established by the incremental method.According to the stress and deformation mechanism of the structure,the basic assumption of deformation coordination of soil nailing head and row pile in corresponding position was introduced in the calculation method.Moreover,the construction conditions of the excavation step were also considered.The engineering applicability of the horizontal displacement calculation method was verified by the comparison of the calculation results and the monitoring results of the project.