The Research Of Simulation About Prestressed Anchor And Lattice Frame

In recent years, with the rapid development of the country’s infrastructure construction,and with the development of highway, railway and the large-scale development of urban construction, we inevitably to excavat. Due to improper handling, many artificial landslide had formed. The method for landslide prevention and cure have many descriptions. Lattice girder anchorage system has the advantages of convenient construction, reasonable cost and safe and reliable. As a landslide prevention measure, with collocation of vegetation and slope landscaping effect, lattice girder anchorage system is widely used in engineering design.In order to study the stress distribution of frame beam and cable anchor and rock soil composite structure in herringbone vierendeel girder anchorage system,the interaction mechanism between vierendeel girder,beam and anchor cable. The study could make referencethe for follow-up study and propos reasonable suggestions for engineering design.This paper makes the following specific research work:1)Shall be borne by lattice frame anchor large-scale physical model test [1] of the research group as the research background, combined with design method of the physical test and the measured parameters. Firstly, by ANSYS software built a basic model of soil,rational divide the grid model. Reused FLAC-3D(Geotechnical numerical simulation software) to anchor and lattice structure supporting system of 3D numerical simulation was performed.2)Carried out the research of basic landslide model test, on the basis of the basic model tests, simulated the non prestressed anchor cable lattice structure test, analysed the data of the simulation test. Subsequent applied the cable to prestress respectively on a square lattice structure- square section, a square lattice structure- rectangular, rectangular lattice structure- square section, rectangular lattice structure- rectangular cross sectional dimension of anchor cable lattice structure and simulated analysis.3)On the basis of the research of the above structure form, and the prestressed anchorage and diamond type lattice structure, herringbone lattice structure and arch type lattice structure have been calculated and analyzed. Studied the distribution rule of strain distribution and stress distribution with landslide function, and focuses on the analysis of stress distribution, the changing characteristics, failure mode and loss of prestress of the cable element and beam element in the lattice structure, and analyzed the torque of the herringbone framed beam and arch framed beam.4)The results of simulation calculation and the computing result of analysis representation and the results of the physical model test are verified. Analysed computational structure and the most vulnerable points of the lattice beam and the maximum axial force position of the anchor cable are expounded. Finally some suggestions were put forward for the practical engineering design.