基于AHP权重的复合土钉支护基坑变形数值分析

Numerical Analysis of Foundation Excavation Deformation Supported by Composite Soil Nailing Based on AHP Weight

为减小深基坑设计和施工的困难,基于层次分析法(AHP)影响因子权重,建立层次结构体系、判断矩阵、层次单排序与一致性检验、层次总排序与一致性检验,确定复合土钉支护下的基坑变形,并结合兰州某深基坑土钉支护实例,通过FLAC3D数值模拟软件建立几何模型及有关物理力学参数,基于权重计算结果分析水平位移、支护参数对基坑位移的影响规律,探究基坑开挖过程的变形特性,验证AHP应用于基坑的合理性。

In order to reduce the difficulty of deep foundation excavation design and construction , based on the analytic hierarchy process ( AHP ) impact factor weights, through the establishment of hierarchy system, to establish judgment matrix, single hierarchical arrangement and check consistency, overall ranking levels and check consistency to determine the deformation of foundation excavation, and combined with some examples of soil nailing support of deep foundation excavation in Lanzhou, by FLAC3D numerical simulation software to establish the geometric model, the physical and mechanical parameters, based on the weight calculation result, the horizontal displacement, the influence law of supporting parameters on the displacement of foundation excavation is analyzed, the deformation characteristics in the process of foundation excavation is explored. The rationality of the application of AHP in foundation excavation research is verified.