Model Test Research On Pre-stressed Lattice Beam Anchorage And Its Numerical Simulated

In the landslide governance engineering, pre-stressed trellis anchoring technology can not only make natural carrying capacity of rock mass performance better and reinforce unstable rock mass partially, but also has advantages such as beautiful, light, solid, etc.Pre-stressed trellis anchoring technology has become an important means for landslide governance and is widely used at home and abroad. As the application time is short, its theory and research is still lagging behind the application of engineering practice. In practical engineering design, trellis is usually considered as the outer anchor pier of the bolt. It is designed based on experience and analogy, far from standardization and normalization.The article relies on the Chinese geological survey project “research on large physical model test about landslide prevention of trellis technology”. The project conducts the physical model tests of pre-stressed trellis anchoring. It focuses on the mechanism, deformation, and failure character of Pre-stressed trellis anchoring system used in landslide prevention project.The main content and results are as follows:(1) Carry out pre-stressed anchoring trellis physical model test of 1:5 ratio. Gain a lot of data through soil pressure box, displacement meter, total station, anchor tension meter, stain gages and so on.(2) Determine the soil pressure variation, displacement of sliding mass, force distribution and deformation of trellis beam and bolt. Summarize the failure mode of trellis anchoring system by slope excavation as well as data analysis.(3) Based on physical model tests, using FLAC 3D to conduct numerical simulation and analysis and verifying the deformation law of trellis anchor in physical model tests,and summarize the safety monitoring of the pre-stressed trellis anchoring.