建筑信息模型(building information modeling,BIM)与地理信息系统(geographic information system,GIS)技术在数据来源和信息表达等方面存在显著的区别,因此难以实现有效的数据信息的融合与可计算模型的生成.以物质点模型作为集成媒介,基于BIM的参数化建模技术与GIS的地层建模技术,分别构建人工填方边坡与三维地质模型,并进行集成融合构建反映原始地形、地质结构,及构筑物信息的三维物质点模型.在此基础上,采用物质点方法(material point method,MPM),模拟并分析了高填方边坡大变形的失稳全过程.以湖北十堰市山区产业园高填方边坡为研究对象,利用上述模型集成方法,构建融合人工填方边坡与原始边坡的三维物质点模型,分析其潜在破坏机制与影响范围.结果表明:若缺少前缘挡土墙支撑,平台填土将发生大规模垮塌.厚度约为11 m的堆积体将覆盖下方的公路,并对桥墩和桥柱造成影响.F4和B1平台位于窄收口地形,仍可保障其后方平台整体保持稳定.该集成模型方法为构建融合天然地质体与人工构筑物可计算数值模型方面提供了新的思路.
Analysis of Large Deformation and Instability Process of High Fill Slope Based on BIM+GIS Integrated Model
The distinctions between BIM(building information modeling)and GIS(geographic information system)technologies in terms of data sources and information representation pose significant challenges in achieving the integration of data information and the generation of computable models.Taking the material point model as the integrated medium,based on the parametric modeling technology of BIM and the stratum modeling technology of GIS,the artificial fill slope and the three-dimensional geological model were constructed respectively,and the three-dimensional material point model reflecting the original terrain,geological structure and struc-ture information was constructed by integrated fusion.On this basis,the material point method(MPM)was used to simulate and ana-lyze the whole process of large deformation instability of high fill slope.Taking the high fill slope of a mountain industrial park as the research object,a three-dimensional material point model integrating artificial fill slope and original slope was constructed by using the above model integration method,and its potential failure mechanism and influence range were analyzed.The results show that if there is no front retaining wall to support the filling of the platforms,large-scale collapse will occur.The deposit with a thickness of about 11 meters will cover the road below and affect the piers and bridge columns.The F4 and B1 platforms are located in the narrow mouth ter-rain,which can still ensure the overall stability of the rear platform.The integrated model method provides a new idea for constructing a computable numerical model that integrates natural geological bodies and artificial structures.
BIMGISthree-dimensional material point modelhigh fill slopelarge deformation instability
万方数据
维普
