Large Physical Model Test On Lattice Frame Anchor Technology For Landslide Prevention And Control

In recent years, due to the abnormal changes of climate, the frequent occurrence ofearthquake and growing of human engineering activities, make landslides and othergeological disasters continue to occur, not only causes a serious threat to people’s life andproperty, but also restricts the development of the national economy. So，research on landslideprevention techniques and methods, have important practical significance. In many landslideprevention methods, lattice frame anchor system is a new type of supporting structures, inrecent years is widely used in the areas of road, railway, geological disaster prevention andcontrol. But because of its theoretical research lags far behind the engineering practice, thuslimits its development in engineering tests.This article is according to China Geological Survey Project “Large Physical Model Teston lattice frame anchor technology for landslide prevention and control” as the theoreticalbasis for further study, the project number is:1212011220145, focusing on lattice framedanchor system of anti-sliding mechanism, characteristics of deformation and failure modes.The main research achievements in this thesis are as follows:(1)Doing landslide model test respectively, which are landslide basic parameters inphysical model test, small scale physical model testing, large scale physical model test anddestruction test of lattice beam, obtain a large amount of test data.(2)Through the soil pressure box which is installed on the bottom of the lattice beam，testing soil pressure at the bottom of the lattice beam changes in the process of landslide;through the displacement meter which is installed in the front of lattice beam and the landslideleading-edge soil body, testing the deformation of lattice beam and the landslide; through thestrain gauge which is pasted lattice beam steel and surface, collecting stress variation data ofthe lattice beam; through the anchor cable tension meter which is installed in the head ofanchor cable and the strain gauge which is pasted on the anchor, testing the change of theaxial force and deformation of the anchor cable. According to the test data, analysis of thestress and deformation law of anchor and lattice beam in the different stages. (3)Doing the break test of lattice beam, though testing the lattice beam strain data andobserving cracks of the lattice beam after unloaded, summarize the failure mode of the latticebeam is the tension side bending shear failure and node plastic hinge damage.