Study On Mechanism Of Binary Slope Landslide And Application Of Low-volume Solidified Soil

This article takes the engineering example of an anti-slide pile fracture caused by a landslide in Hunan as the research background of this article.By studying the slope geological report and further investigation and analysis,it is concluded that rainfall infiltration leads to the side of the binary structure(clay-soft rock).The carbonaceous shale in the slope is softened to form a weak interlayer.The engineering problem of the anti-slide pile failure caused by the landslide occurs when the stress redistribution caused by excavation unloading and the water pressure caused by rainfall.Therefore,for researchers at home and abroad,it is rarely considered at the same time that the superposition effect of low stress level and hydraulic action on the slope stability of the binary structure is important.In this paper,it is considered that the expression of the hydraulic analysis model of the slope of the binary structure needs to use stress.The calculation of zonal strength is more in line with the actual engineering situation,so four possible binary structural slope hydraulic models are proposed based on the analysis of the dynamics of seepage,and the safety factor of this engineering case needs to be derived on the basis of theoretical calculation through analysis and calculation.Only a reduction of 1.32 can ensure the slope safety.Cement solidified soil can effectively use the original supporting structure and resources and the role of rapid rescue and reinforcement.At present,domestic and foreign researchers'research on solidified soil has focused on a series of physical and chemical characteristics under high cement content conditions,such as cement admixture.The amount is more than 20%,30%or even 40%,and the temporary period is also distributed at 7d,14d,and 28d.Few studies have been conducted on the moisture change and strength growth characteristics of the solidified soil at low cement content.In the early period(1 to 6 hours),the shear strength test,air-drying test,and drop cone test of the solidified soil with cement content were used to study the changes in water migration and evaluation standards;and by analyzing the different cement content(6%,8%,10%),age(1 day,3 days,5 days,7 days),initial moisture content(28%,32%,36%,40%)on the strength of solidified soil,low cement content solidification The study of soil provides more theoretical basis and supports the test parameters when selecting the best mixing ratio for the built-in solidified soil gravity retaining wall structure.In order to adopt an effective reinforcement structure,a new construction technique and reinforcement method is proposed—the built-in solidified soil gravity retaining wall structure.As there is no gravity retaining wall formed with low cement content solidified soil in domestic engineering reinforcement at present to deal with the case of binary structure slopes,the detailed construction process and the advantages and disadvantages of the structure are introduced.The finite element analysis of the built-in solidified soil gravity retaining wall structure before and after the reinforcement of the slope is simulated by ABAQUS finite element software.Coefficient and shear force of anti-slide piles to illustrate the reliability of the new structure.