Study On Reinforcement Theory For Prestressed Anchor Rope Lattice In The High Slope And Its Optimization In Design Parameters

ABSTRACT:The Dissertation studied the reinforcement mechanism of prestressed cable lattice retaining wall structure, combined with Beijing Mentougou high slope engineering, the use of means of in-situ test and numerical analysis, analysis of the mechanism of this kind of supporting structure and wall back earth pressure characteristics.Finally, by orthogonal analysis,with the slope safety factor as the index, put forward the optimization design parameters of the supporting structure.(1) In-situ testthe distribution of lateral earth pressure along wall height is not a simple rectangular, trapezoidal, triangular,may appear in partial lateral earth pressure is greater than the vertical earth pressure; the lattice beamreinforcement stresses-time curve showing "W" type; anchor long-term presence of cable slack, you need to again raise tension cable tension.(2) reinforcement mechanism of prestressed anchor rope lattice wall anchor for prestressed beams and lattice compound used by the force transmitted to the anchor will fall deeper soil layers reinforce stability, forming an effective slope active anti-slide system; Due to anchor role, vertical earth pressure along the wall after wall of high stress redistribution, there are a number of stress peaks in the height wall of earth pressure level at5m maximum, rather than the bottom of the wall, and along the wall height direction in a continuous wave-shaped distribution.(3) By orthogonal experiment model,we conclude anti-slide pile length, anchor cable prestress, anchor length is the most important factors that influence the supporting effect.(4)The project optimization parameters of prestressed anchor rope lattice retaining wall combination:anchorage length13m,0.2m in diameter, anchor cable4x s15.2, prestress is500kN; Choose C30concrete, cross section form0.4m x0.4m, length and diameter of anti-slide pile is5m and0.8m; Anchor rope and the lattice spacing are3m.This kind of research method of the actual project is of certain guiding significance and reference value.