Study On The Bearing Characteristics Of Reinforced Soil Retaining Wall Based On Raw Soil Curing

When the soil moisture content of slopes and roadbeds is high,the liquid limit of the soil is high,the strength is low,and the permeability is low,which can easily cause collapse and damage accidents.Considering the cost and convenience of material collection,priority will be given to improving the on-site soil during construction to meet construction requirements and process standards,achieving the goal of resource conservation and green construction.Based on actual engineering projects,this article compares and analyzes the physical and mechanical properties of original soil and solidified soil through experiments,and proposes a solidification improvement technology suitable for high water content silty clay.In order to expand the application scope of this soil solidification technology,the soil solidification technology was combined with slope reinforcement technology,and the bearing capacity of retaining walls with different structures and slope ratios was constructed and analyzed.Combined with numerical simulation results,the rationality of the simultaneous application of soil solidification technology and reinforcement technology was further verified.This achievement was applied in practical engineering construction and achieved good engineering practice results.This article focuses on the research on the bearing characteristics of reinforced soil retaining walls based on original soil solidification,as follows:(1)Through indoor geotechnical tests,various performance tests were conducted on on-site soil samples.It was found that the silty clay in this area belongs to soil with high water content,poor grading,and excessive porosity,and cannot be directly used as the main material of the project.Therefore,it is necessary to solidify and improve it.(2)Through indoor experiments,it was found that adding 2% soil stabilizing agent,10% soil water reducing and consolidating powder,and 4% cement to the original soil resulted in the optimal maximum dry density and moisture content of the sample.The unconfined compressive strength of the cured sample increased by 24.61%,the cohesion increased by55.52%,and the internal friction angle increased by 62.5%.(3)Through the indoor model test research,it is found that the reinforced soil retaining wall solidified with original soil can improve the bearing capacity of the supported main body and allow greater lateral deformation.When the slope body is under the same load,the vertical settlement of the slope top of the reinforced solidified soil decreases by 16.57%,and the horizontal displacement of the slope surface and the lateral earth pressure of the wall back decrease by 30.49%,which can better constrain the deformation of the retaining wall.When the reinforcement method and solidification material ratio of the soil are consistent,the larger the slope ratio,the smaller the deformation capacity that the slope can resist,and the larger the deformation variable of the geogrid.(4)A three-dimensional calculation model is established by using the finite difference software FLAC3 D to simulate reinforced and solidified soil retaining walls with different slope ratios.The horizontal displacement of the retaining wall under the action of ultimate load,the overall displacement of the slope,the stress distribution in the soil,and the deformation of the geogrid are analyzed.The results are compared with the indoor model test results,further verifying the reliability of the experiment and the feasibility of this study,And it has been applied in engineering practice,providing a reference basis for slope support and protection in special road sections.