Miniature Group Pile And Slope Interaction Mechanism's Value Research Under Overload Function

In the miniature group pile adds in the soil nail wall compound supports system, miniature pile withstanding vertical load and lateral earth pressure, soil nail withstand horizontal loads. At present, for the complex support system of research is still in early stages. This article take finite difference software FLAC3D as a tool, studied the interaction law on mini piles and slope in this compound supports system under the action of overloading, has obtained some preliminary achievements. This article has mainly conducted the following two aspect research:Analysis of single miniature pile and slope interaction law, discussed the miniature pile length, pile diameter, soil parameters and other factors influence of pile body bending moment, the lateral displacement and the the slope displacement, research shows that:with the micro-pile length increases, maximum bending moment of pile increase,pile lateral displacement and the displacement of the slope decreases; with the increase in diameter of micro-pile, bending moment increases, the lateral displacement of pile decreases, the slope of the displacement decreases; with piles to the slope of the shoulder distance increases, the bending moment of pile decreases, the pile lateral displacement decreases and then increases, the displacement of the slope increases; with pre axial force of soil nails increase,bending moment of pile decreases, the lateral displacement of the pile decreases, the slope of the displacement decreases; with the increase of internal friction angle of soil,pile bending moment decreases; pile the lateral displacement decreases, the slope of the displacement decreases; with soil cohesion increases, the pile bending moment decreases; pile lateral displacement decreases, the slope of the displacement decreases; with overload on the top of slope increases, pile bending moment increases; pile lateral displacement increase, slope displacement increases. Analysis of multiple rows of miniature pile and slope interaction law, discussed the miniature pile length, pile diameter, soil parameters and other factors influence of pile body bending moment, the lateral displacement and the the slope displacement, research shows that: with the micro-pile length increases, bending moment of pile is essentially the same, pile lateral displacement increases, the slope displacement increases; with the increase in diameter of micro-pile,pile bending moment increases, the lateral displacement of pile decreases, the slope of the displacement decreases; with the pile spacing increases, the moment of middle row pile was increasing, front and rear row pile moment changes less, the lateral displacement of pile decreases, the slope of the horizontal displacement decreases, little change in the slope crest settlement; with the pre axial force of soil nails increase,pile bending moment is essentially the same, the lateral displacement of pile small changes, small changes in the slope of the displacement; with the increase of internal friction angle of soil, pile bending moment is increased, the lateral displacement of the pile decreases, the slope of the displacement decreases; with the soil cohesion increases, pile lateral displacement decreases, the slope of the displacement decreases.