Study On The PC Frame Anchor System And The Design Method Research

This paper based on the background of a high slope reinforcement project in Guangzhou. Analysis of the anchoring mechanism of PC lattice beam and anchor cable. Study on the PC lattice structure calculation method of beam section design.The process was simulated step by step according to the construction process. The stress state of girder was investigated. The interaction of lattice beam, anchor cable and slope stress state is studied. Research on cast-in-place girder in the damage mechanism of bending failure and even the whole frame for sliding. To explore the factors influencing the anchoring effect, these factors mainly include the beam bending moment distribution, slip surface and anchorage length determination. In order to avoid the cast-in-place girder midspan moment is too large, the PC frame can avoid the big moment beam in the middle of beam. The PC frame is used for the permanent works, in some special circumstances need to be removed first, the beam can use again. Several research have been done as follows:(1) The calculation method of lattice beam theory are summarized, and the simulation results and theoretical calculation results were compared.(2) A finite element modal of simulating of PC frame has been developed. Study the effect of anchoring force after the beam deflection of the beam and stress. Analysis of various parameters on the PC frame, get a table of different set of bearing capacity of anchor lattice beam reinforcement and size.(3) Study on the 4 kinds of calculation method of safety coefficient of slope. Deduces the calculation method of using Bishop method to derive the slope anchor load. Anchorage mechanism of anchor cable are studied. Calculate the critical value of the anchorage length. The results for the design and optimization of PC frame provides theory support.(4) According to the slope engineering project of Guangzhou, put forward the overall design scheme. The use of general geotechnical analysis software FLAC3D the effect of the scheme is analyzed.The results could be referred to design, construction and maintenance of related bridge.