对撑式排桩支护体系的结构分析和优化设计

Structure Analysis and Optimum Design of Soldier Pile System with Cross Bracing as a Deep Excavation Supporting System

对撑式单排混凝土灌注桩适合在狭长型深基坑的开挖支护,该支护排桩的桩距、嵌固深度、支撑水平间距是影响支护工程安全可靠性和工程投资的主要工程设计参数。以御江半岛排水涵基坑支护工程为例,运用FLAC3D有限元软件,计算分析不同方案下排桩的变形、稳定、弯矩变化规律,绘制了灌注桩设计参数与位移、弯矩关系曲线簇图,为同类工程快速拟定初步设计方案提供参考。

The cross braced single row reinforced concrete soldier pile is suitable for the support of deep excavation with the narrow and long geometry. The soldier pile spacing, embedment depth and the horizontal distance of cross bracing are the main engineering design parameters that affect the safety, reliability, and construction cost of the supporting system. The Yujiang Peninsula drainage culvert project was used as an example for the analysis. In the analysis the FLAC3D software was used to analyze the deformation, force and stability of soldier piles under different conditions. The diagram of displacement and bending moment change along the soldier pile could be developed.