Study On The Stress Transfer Mechanism Based On Meso Mechanical Experiment Of Soil Anchor

With the rapid development of Civil Engineering, Geotechnical anchoring technology has became the mainstay of protection engineering stability. Great achievements have been made in the research of anchorage technology in rock. However, the study on the interface characteristics and stress transfer mechanism of soil anchor is relatively lagging behind.Therefore,to establish a method to describe the different influencing factors of anchored interface characteristics is very meaningful. In this paper, based on the fractal characteristics of anchor solid surface, the load transfer law of soil anchor is studie;Starting from the contact interface between soil and anchor, The method of fractal geometry is used to measure the interface of anchor soil,summarized the fractal method, Presenting a method for describing the interface characteristics of soil anchor, Summarizing the fractal characteristics of the interface,Obtaining the fractal dimension. The W-M function is used to generate two-dimensional curve, The curve is introduced into ANSYS to simulate the interface, Foreshadowing the generation of interface elements;Experimental study of digital speckle correlation method is used to design the experimental model of axial symmetry visualization.Combined with the digital speckle correlation method, the measured soil anchor solid and the surrounding with the increase of load displacement and strain nephogram, find out the soil anchor displacement and strain development law, and provides a new method for geotechnical engineering experiment;Based on the fractal characteristics of soil anchor and the displacement field of strain field, According to the experimental results,The constitutive relation of the interface layer is established by using the flow rule associated with the Coulomb yield condition, The expressions of the axial force and shear stress distribution of the anchor are derived,Analyzing the factors that affect the distribution of shear stress according to the expression;According to the fractal characteristic experiment and the digital speckle simulation experiment, the interface element of soil anchor is established, which accords with the properties of the friction material.The soil anchor interface element is applied to the numerical simulation,and compared with the data obtained from the actual engineering, the load transfer law of the anchor layer is obtained.