Research On Mechanical Characteristics And Deformation Of Double-Row Piles With Anchor Composite Structure In Deep Foundation Pit

Double row piles-composite anchor supporting structure is a new form of foundation pit supporting, have both the traditional pile anchor bracing structure and the emerging structure with double row piles characteristics, statically indeterminate structure characteristics, the whole rigidity is large, control deformation effect is well. At present the research for the structural system is less, no theory formation have been widely recognized, theory research is far lagger behind the engineering practice. Based on the study of existing double row pile and anchor supporting structure theory, combined with the double row pile composite anchor supporting structure characteristics, put forward the new calculation model and calculation method suitable for this retaining structure. Analyzes the calculating model mechanical characteristics and apply it to practice engineering examples, through contrastive analysis the calculated results with the current engineering design software, verified the rationality and applicability of new calculation model and calculation method. Base on "YingKou WanDa plaza" foundation pit engineering project, establish FLAC^3D three-dimensional numerical model, study the deformation law and mechanical properties of double row pile-anchor composite, compared with the simulation results and measured monitoring data, verify the rationality of the numerical model and analys the reasons of the differences. Through adjustment parameters of retaining structure in numerical calculation model, optimization design double row pile-composite anchor supporting structure system, obtained the influence law of each factor.