基于BIM技术的边坡支护结构微型抗滑桩群设计方法

Design method of slopes reinforced with micropiles group based on BIM technology

微型抗滑桩群是滑坡地质灾害应急处置工程的新型支挡结构,为对其进行快速设计计算,以平面刚架假设和桩群效应为初始设计依据,建立简化设计方程。基于BIM通用平台—Revit开展二次开发,以简化方程为依据,在BIM平台上实现微型抗滑桩群的设计计算与真实边坡的快速建模;同时,采用ACIS(.STA)文件作为中转文件的方法,实现了边坡工程BIM设计与有限元数值模拟的有效衔接。最后以广巴高速一路堑边坡治理工程为例,在BIM平台上对具有复杂组构与界面的工程边坡进行建模,完成微型抗滑桩群的构型设计、数值模拟和结构优化设计,检验了边坡加固设计方案的合理性和二次开发成果的有效性。

The micro-piles group is a new type of supporting structure for the emergency treatment of landslide geological disasters,in order to realize the design and calculation of micro-piles group rapidly,the assumption of plane rigid frame and pile group effects are used to establish simplified design equations as the initial design basis.Secondary development of Revit is carried out to enable the preliminary design of micro-pile group based on the simplified equation,and the rapid model of the natural slopes based on the BIM platform.At the same time,the ACIS(.STA)file is used as a transit file to achieve an effective connection between BIM design and finite element numerical simulation for slope engineering.Finally,taking the cutting slope of a highway in Guangba as an example,the numerical simulation and structural optimization design of the micro-piles group were carried out based on the BIM platform by modelling the slope with complex configurations and interfaces.The case effectively validates the rationality of the slope strengthening design and the effectiveness of the secondary development.