Contrastive Study On The Stress Characteristics Of Double-row And Single-row Piles For Landslide Prevention

Since double-row anti-slide piles can provide greater anti-sliding force and resistance to larger pile deformation,they have been widely used in engineering in recent years,but because the double-row anti-slide mechanism and pile-soil action characteristics are not well understood,As a result,its promotion and application in the project are subject to certain restrictions.Based on this,in this paper,through the model test,on the basis of comparison with single-row anti-slide piles of equal section,combined with numerical simulation,the mechanical mechanism and anti-slide characteristics of double-row anti-slide piles are studied.The main research contents of this article are as follows:1.Analyze the mechanical characteristics of different rows of double-row anti-slide pilesThrough the analysis of the model test data,the displacement of the top of the pile and the body of the parallel row of double-row anti-slide piles without coupling beams,the parallel row of double-row anti-slide piles with parallel beams,and the plum blossom-shaped double row of anti-slide piles with coupling beams The force and the bending moment of the pile body were compared,and it is believed that the plum-shaped double-row anti-slide piles with coupling beams can not only bear a large landslide thrust,but also have a reasonable internal force distribution.2.Compare the deformation and stress characteristics of double-row anti-slide pile and single-row anti-slide pileUsing the finite element simulation software ABAQUS,the calculation models of the reinforced landslide of the double-row anti-slide pile and the single-row anti-slide pile were established and extracted under the condition that the cross-section of the double-row pile and the double-row pile were consistent with the cross-section of the single-row pile.The displacement of the pile body,the bending moment of the pile body and the earth pressure before and after the pile under load are discussed,and the difference between the stress and deformation of the two is discussed.It is considered that the rationality of the force and the ability to resist sliding In other respects,the double-row anti-slide pile is obviously better than the single-row anti-slide pile.3.Study on the influence of anti-sliding parameters of soil arching effect of double-row anti-sliding pilesThrough numerical simulation software,referring to the double-row pile landslide reinforcement model test,multiple sets of double-row anti-slide pile 3D numerical models were established.With the help of orthogonal test analysis method,the pile body cross-sectional size,pile spacing,pile row spacing,landslide were carried out The influence degree of physical parameters such as body elastic modulus,Poisson’s ratio and pile-soil friction coefficient on the soil arching effect of piles is analyzed,and it is considered that the pile spacing and the Poisson’s ratio of soils have a greater effect on soil arching effects.