Research On The Application Of Soil Nail Wall Supporting In Clayey Silt And Silty Clay

Most of the soils of Taiyuan are the clayey silt and silty sticky. The level ofunderground water is low. After the excavation the soil has certain stability.Appropriate supporting method has the advantages of cost saving and protectionof building stability. So choose soil nail wall supporting effect is very good. Asthe background of characteristic of soil in Taiyuan areas, Under the condition ofsoil nail wall support, on the basis of summarizing the previous research results,in taiyuan region in the process of excavation and supporting of deep foundationpit, The supporting structure deformation and internal force distribution areanalyzed.The soil deformation and internal force distribution are analyzed. Thefollowing work was finished and research conclusions obtained:(1)The previous study of soil nail wall was summarized.The advantagesand disadvantages of soil nailing wall supporting and application scope weresummarized.(2)Based on the Rankine’s earth pressure theory, Using the Wangbuyunearth pressure distribution, in view of the properties of clayey silt and silty clay,considering the cohesion of the soil mass stability, Simplifying and analysisingmodel, To meet security under the premise of reducing the support strength. (3) In Taiyuan silty clay and clayey silt soil characteristic parameter, withthe help of simulation software FLAC3D some factors affecting the effects ofsoil nail wall supporting is analyzed. These factors are drawn to the influencelaw of soil nail wall supporting effect. Under the influence of these factors thedistribution law of internal force and displacement of supporting structure andsoil were obtained.(4)For the lack of suppor of single soil nailing wall in the silty clay andclayey silt, the numerical simulation method were used to simulate reinforcingsupporting. In the case of reinforcement, the distribution law of internal forceand displacement of supporting structure and soil were obtained.(5)In the background of Taiyuan subway station, compared withunderground continuous wall and the soil nail reinforcement, we can conlusionthat the effect of strengthen the supporting and underground continuous wallsupporting is the same.