Study on Deformation Feature of Combined Support System of Anchor Cable Frame Beam and Anti-slide Pile for Bedding Slope of the Highway
Taking a smooth-layer high slope of Wuchang Expressway in Guizhou Province as an example,the deformation law of the anchor cable frame beam-slip-resistant pile support system is investigated by establishing a finite element model.The result shows that it is unreasonable to apply the same prestress value to each row of anchor cables and there is a risk of sequential damage of the anchor cable frame and anti-slip pile.According to the change rule of the displacement of each row of anchor cables with the top of the pile,differentiated prestress value should be set,so that the two support forms of anchor cable frame and anti-slip pile can achieve the best support effect at the same time.When it is closer to the top of the pile,the lower prestress value should be set,and far away from the top of the pile,higher prestress value should be set.The calculation method of prestress value of anchor cable based on deformation coordination condition is presented.The error between the anchor cable prestress value obtained by the proposed method and the numerical simulation results is within 6％,which meets the design accuracy requirements.
anchor cable frameanti-slip piledeformation coordinationprestressing forcesupporting result
万方数据
维普
