The Study Of Stress Mechanism And Design Calculation Of The Pre-stressed Anchor Of Lattice Beam

In recent years, the lattice beam of pre-stressed anchor is more and more applied toslope reinforcement engineering project. That’s because the contact area among slopesurface and the lattice beam is large, and pre-stressed anchor can reinforce very well in deepslope, a combination of both, makes the lattice beam of pre-stressed anchor can not onlyensure the reinforcement of the deep slope but also the protection of shallow slope.Pre-stressed anchor cable lattice beam can give full play to the rock potential self supporting,and improve their own strength and stability ability, and reduce weight of supportingstructure itself, save engineering materials, make sure the security and stability of the slope.With the remarkable economic and social benefits, it has been pay more attention and moredevelopment and application. But now with the problem of lacking research on loadingmechanism of the pre-stressed anchor of lattice beam and no corresponding standard toguide design, so it is very necessary to strengthen the study of stress mechanism and designcalculation of the pre-stressed anchor of lattice beam.A2d model is established by MIDAS/GTS to research the effect of slope reinforcementon different anchor size and spacing. Finally, a conclusion that the best effect of slopereinforcement can get when the pre-stress value of the anchor is about500kN-600kN, andthe section diameter is equal to8cm, the spacing is4m, the driven angle is20°inhomogeneous silty clay steep slope.In the basis of researched parameters of anchor, a3d model is established to researchthe effect of slope reinforcement on different lattice beam size and spacing. And last aconclusion that the best effect of slope reinforcement can get when the side length of latticebeam is about0.4m-0.45m, and the spacing between is equal to4m in homogeneous siltyclay steep slope, which is tallies with the results of2d model.The conclusions of this paper is of certain reference value on the design and calculationin engineering project of the lattice beam of pre-stressed anchor.