The Shear Rheological Properties Of Anchoring Interface Effect On Load Transfer

Anchor is widely used in all kinds of engineering, such as hydro-engineering project, road construction, slope reinforcement and pit supporting, for the advantage of good effect of constructing, low cost and simple constructing process. Anchor is widely used, and a series of results in the study of the theories of anchor are achieved, however, the working mechanism of soil anchor has not been fully understood and realistic engineering applications are far advanced than the theory study. So, carrying out rheological test of anchorage interface and studying the rheological properties and long-term strength of anchorage system have realistic guiding significance in the control of the long-term stability of anchorage body. This paper studies the working mechanism of Pressure anchor by carrying out indoor Miniatures test, and the results are shown as follows:1.By analyzing the stain value measured by deformer, the results are shown as follows: anchorage body’s axial force is greatest at the anchorage port, and the greatest value is rather big; as the anchoring length decreases, the axial force becomes small; when the anchoring length is long, the value of axial force at anchor end is low, which increases as the load increases; the distribution of shear strain is basically the same as the axial force, which is greatest at the anchor port, and decreases along with the anchoring length, and presents like the distribution of power function.2. Based on the load transfer method, using trilinear model, the load transfer function of grouted body is conducted. By analyzing the data of test, choosing the visco-elastoplastic model as the rheological model, the load transfer function P(z,t) considering rheological is got through the model and the load transfer function that has already been conducted.3. The effect to the function curve caused by every parameter of load transfer function are discussed, then conclusions are got by comparing a group of tested data with function curve, which are that rheological will not cause effect to the whole picture of load transferring; as the time goes, the rheological of axial is greater when the grouted body’s axial force is closer to the bottom bearing plate, and the effect of rheological become smaller along the bar as the grouted body’s axial force is away from the bottom bearing plate.