Study On Slope Pressure On Prestressed Anchor-cable Beam-on-foundation

The prestressed anchor-cable beam-on-foundation is efficient works commonly used in high rock slope projects. The structure is made up of prestressed anchor-cable and beam-on-foundation. The combined structure can utilize the latent self-sustain capability of rock or soil mass and produce powerful stabilizing force on slope. what's more, as the structure is simple, lower weight and economical use of materials, it has well economic and technical value. But the theoretics research of the structure is still behind the practice and design theory of the structure has some defects. The most primary problem is how to properly ascertain the slope pressure act on beam-on-foundation.The thesis points out the existing problems in the study of slope pressure bellow beam-on-foundation of high cut-slopes and carrys on research aim at these problems. By study for a mass of high cut-slope cases, high-cut slope are classified into the hard rock slope and the soft-cracked rock slope, the thesis respectively discuss the slope pressure act on beam-on-foundation at the pulling anchor-cable stage and long term working stage.According to the different slope stratum properties, the slope pressure act on the beam-on-foundation can be calculated by homogeneous hypothesis or Winkler foundation hypothesis or infinite half elastic foundation hypothesis at the pulling anchor-cable stage and by limited equilibrium theory (the total slope equilibrium and the interior stress equilibrium) at the long term working stage.Finite element software Plaxis was chose to conduct numerical stimulation. Stimulated the pressure distribution below beam-on-foundation at the pulling anchor-cable stage and long term working stage separately. Compare theoretics solution with numerical simulation results and testing value and find out the causation of the differences.By contrast with theoretics analysis numerical simulation outcome and testing value of practical projects, testified the proposal in the thesis is rational in a certain extent and the corresponding theoretics methods are practicable. Through analyzed, it can be get the result that the slope pressure act on beam-on-foundation is tightly corresponding with the slope angle,sliding surface angle,the position of beam-on-foundation and the contact rigidity of the surface between the beam and slope. The conclusion of this paper is of significant reference valuable in the design of beam-on-foundation in practical engineering projects.