STUDY ON SUPPORT MECHANISM OF ANCHORED LATTICE BEAM COMBINATION SHOTCRETE TECHNOLOGY APPLIED IN GANGUE SLOPE
LUO Ping-ping;HE Hui;CHEN Wen-ji;School of Civil Engineering, Henan Polytechnic University;Institute of Management Engineering, Zhengzhou University;China zzsen cost consultation co., Ltd.;
To study support mechanis m, mechanical characteristics and stability of anchored lattice beam combination shotcrete applied in gangue slope, on the basis of cable, beam and shell structure units embedded in FLAC3D, a relevant mathematical model is established, and an in-depth research is conducted with an engineering example. Some conclusions are following: firstly, after supported, tension and shear plastic zone is significantly reduced, the increased stripe of shear stress moves to the anchors end, shear stress is reduced at the slope surface and within anchored zone; secondly, after shotcrete at the slope surface, the axial forces and bending moments suffered by lattice beams increase, meanwhile, anchor tension and grout stress also increase. It is recommended that thin shotcrete in slope engineering under the premise of enough security reserve, in this way, both reducing the lattice beam force,but also improving the economy.