Design Of Centrifugal Shaking Table Tests Of Anchored Anti-slide Piles

In recent years, anchored anti-slide pile has become one of the primary supportingstructures for controlling large and medium-sized landslide. The damage investigationof the great Wenchuan earthquake shows that the seismic design of anchored anti-slidepiles may be too conservative in China. Therefore, it has important theoretical value andEngineering significance to study the seismic response of anchored anti-slide pile andreveal its conservatism. Taking the anchor-stabilizing piles engineering of Beihoumountain landslide in Hanyuan as a prototype in this paper, the centrifuge shakingmodeling test was designed. The main research works are as follows:1. The studies of landslide reinforced with anti-slide piles at theoretical aspects,numerical simulation and modeling experiments were systematically reviewed and theresearches on centrifuge shaking tests of anti-slide piles were reviewed emphatically.The corresponding shortcomings were pointed out.2. Based on the Beihou-mountain-landslide anchor-stabilizing piles project, fivesets of centrifuge shaking modeling tests were designed. Technical solutions of severalcrucial aspects in test were studied in detail, including similitude-scaling relationshipdetermination, devices selection, and model material selection, preparation of landslidemodel, loading project, sensor placement, test produces, test solutions for key technicaldifficulties and other preparation work.3. The effects of water cement ratio，mass ratio of aggregate to cement，sandpercentage and water reducer dosage on compressive strength and compress moduluswere analyzed by the four factors and three levels orthogonal experiment method. Andthus the test mix of micro-concrete is determined. By regression analysis, the statisticalformula of compressive strength and compress modulus about four factors wasestablished.4. Based on the test programs in this paper, the process of making centrifuge modelis studied and a set of quantifiable working standard is developed.5. The numerical simulation analysis was carried out on the model of slope by theMIDAS/GTS software to obtain the force law of anchor-stabilizing piles under seismiceffect, which verified the reasonableness of the test program.