Experimental Study And Numerical Analysis For Anchor Rod Retaining Wall In Filling Area

With the development of the national economy, there are more and more fill slope in the engineering of road,mine, bridge, water conservancy and city construction. As a light retaining structure, anchor rod retaining wall is widely used in slope supporting engineering because it is safe and economical. The anchor rod retaining wall in filling area is different from the other anchor rod retaining walls using top-down method. Therefore, in the actual design and construction, the anchor rod retaining wall should be treated differently from others. However, its design calculation method is not set up. The enginerring disasters happen repeatedly.The theoretical research lags behind its applications greatly. Therefore, to study the mechanism of the anchor rod retaining wall in filling area has great theoretical significance and engineering application value. The research is based on the project of"Disaster Reduction for Geotechnical Engineering"(No.50625824)of National Science Fund for Distinguished Young Scholars. A systemic study on the anchor rod retaining wall in filling area is executed through field investigation, material collection, in-situ test and numerical simulation. It contains the following parts:â‘ The position of the test equipments and testing method as well as some relevant laboratory experiments are designed and introduced in detail, this could be a good reference for such laboratory experiment and model test of similar project.â‘¡The test is carried out through miniature in-situ test and a great number of detailed testing data are acquired. Earth pressure cells are installed behind the anchor rod retaining wall, from which the author obtains the earth pressure. The steel-string transducer is installed in the anchor from which the author obtains axial load distribution of the anchor in various height . The steel-string transducer is installed in a column from which the atuhor calculates the moment of the column.â‘¢A three-dimensional numerical model for anchor rod retaining wall is made.The earth pressure, displacement of the retaining wall, the axial force of cables and the stress distribution of column are calculated. The comparison of the measured from FLAC3D and measured data has been made, which analyzes the features of stress and deformation of anchor rod retaining wall in filling area. Meanwhile,in order to know the mechanism of anchor rod retaining wall in filling area,a numerical model for cantilever retaining wall was made and the measured data with numerical computation data are also compared.â‘£The earth pressure of measured data is compared with traditional Coulumb. This thesis analyzes the drawbacks of the design theory used in the past and puts forward an improved method. This thesis summarizes the design and calculation methods used in the past and finds a suitable design and calculation method for anchor rod retaining wall in filling area. The method provides a scientific basis for scientific design and construction technology of anchor rod retaining wall in filling area.In this study, the numerical simulation results are agreed with the experimental results, and the experimental results could be explained by the theoretical results. Therefore, the theoretical study is reasonable and credible. The thesis could also provide reference for optimal design, construction and relative specifications revision of anchor rod retaining wall in filling area.