| Anchor plate as a form of provides an important basis of uplift bearing capacity,has a small impact on the environment,the characteristics of small construction speed and construction cost,are widely used in the transmission line tower,large suspension Bridges,tall buildings,the structure of the floating platform,such as retaining wall slope engineering,the reliability of the pulling force of anchor plate prediction is of great significance for engineering safe and economical.Anchor plate on the drawing process is a complex anchor-soil interaction process,but the limitations of traditional measurement methods,unable to get on the anchor plate on the surface of the soil around the anchor plate damage in the process of drawing precise shape,lead to a lot of theoretical research on the analysis of the deformation mechanism of soil anchor weeks when a larger error.At present,the research on the mechanism of uplift deformation and failure of anchor plate is mostly based on the anchor plate in sand,but the research on the mechanism of uplift deformation and failure of anchor plate in silt is not enough.According to the model test of anchor plate in sandy soil,the author studies the characteristics of uplift deformation and failure of anchor plate in silt.The research results of silt compare with the deformation and failure characteristics of anchor plate in sand.In this paper,the advanced particle image velocimetry technique is used to design the relevant test model,to carry out the model test of anchor plate in silt and sand,and to compare and analyze the test data.To determine the influence factors of uplift capacity of anchor plate in silt and sand,the important work of this paper is as follows:(1)In order to analyze the influencing factors of anchor plate in silt and sand,the test of silt and sand with different compactness and different depth of burying is designed,and the PIV non-contact measurement technique is used to measure the drawing process of anchor plate in real time.The visualization of soil deformation measurement around anchor plate during drawing process is realized.The results show that this method has the advantages of no interference,high precision,simple operation and real time measurement.(2)According to the test results,the drawing force and displacement curves under different influences of silt and sandy soil were drawn,and the mechanical characteristics of the relationship curve between uplift force and displacement of anchor plate in silt and sand were analyzed.The influence factors of the uplift bearing capacity of the anchor plate are analyzed.(3)Through Strain Master image processing system,the displacement strain field and shear strain field are obtained by processing the continuous deformation image of the anchor plate during the pulling process of the anchor plate.The displacement field and shear strain field of the same density and the same depth of soil are analyzed,and the deformation mechanism of the soil is revealed.Based on the analysis of the deformation mechanism of soil around the anchor plate in the pulverized soil and sandy soil,the paper provides a reference for future engineering design. |
