Study On Mechanism Of Oblique-inserted Slab-pile Wall Conseidering Vertical Soil Arching Effect Between Plates

In recent years,the new retaining structure of oblique-inserted slab-pile wall has been well applied in urban road and highway subgrade.The new retaining structure can not only meet the basic functions of slope support,but also can effectively solve the problem that the traditional pile wall cannot achieve its own greening.It has the characteristics of beautifying the environment,reducing noise,and adjusting the microclimate.Reasonable plate spacing not only helps to increase plant survival rate,but also makes free drainage of water behind the wall,and the reduction of oblique plate number can also reduce the project cost within a reasonable range.However,it is not clear that the force mechanism of the oblique-inserted slab-pile wall under different plate spacing.The relevant theoretical research is lagging behind the engineering application.Therefore,this paper focus on the retaining pile along the height direction are arranged in the spacing of the oblique-inserted slab-pile wall stress mechanism,reasonable plate spacing and the reasons for setting the spacing of the plate etc..In this paper,based on some engineering application examples,the space between oblique-inserted slab-pile wall panels is divided into six groups,namely,the upper and lower adjacent plates are flush,0.1 times the plate width(13.67 mm),0.2 times the plate width(27.35 mm),0.3 times the plate width(41.02 mm),0.4 times the plate width(54.69 mm)and 0.5 times the plate width(68.37 mm).First of all,according to the test purpose,the corresponding model test scheme is formulated,Then using an indoor model test to the post-plate earth pressure and the stress on the plate structure of the oblique-inserted slab-pile wall.Secondly,the model was simulated by using ABAQUS finite element software,focusing on the effect of stress balance,board structure stress and plate after horizontal soil pressure plate,the vertical earth pressure,displacement of pile,soil arch between plate strength and comprehensive internal friction angle of soil arch between plate strength influence,plate spacing and the relationship between parameters and other aspects of the analysis,according to the testand simulation results,the reasonable range of plate spacing is 0.2~0.4 times of the plate width.Finally,this paper presents a board between the vertical soil arching hypotheses of reasonable arch axis,in the vertical soil arch axis equation is deduced,considering the soil pressure in the soil arching effect between plates and soil pressure calculation formula,the theoretical formula to calculate the value of the comparison with model test and numerical simulation results,The results show that the earth pressure curve derived from this formula has good envelopment and has certain reference value for engineering application.From what has been discussed above,This paper deeply investigated the effect of plate spacing changes in oblique-inserted slab-pile wall.The relevant research results are of great significance for further optimizing and improving the structure of oblique-inserted slab-pile wall and enhancing the application and promotion prospect of this structure.