| Stability analysis of slope always is the difficult point of slope engineering, and landslip happens occasionally when external disturbances works on high slope, it is necessary to analyze stability of high slope when engineering construct. The text combined practical project, cutting slope of Guang-He high speed road, considering comprehensively interaction of wind-load to transmission tower in slope stability first time, and analyzing stability of slope and cutting slope which under transmission tower.Transmission tower and line system is important to country people's life. As a kind of high-rise and flexibility structure, transmission tower is sensitive to wind load, so wind-load is as the most important control load to transmission tower and line, its influential action is significant and can not be ignored. When wind-load acts on tower, generated vibration transfer to foundation, which would influence on stability of high slope. Therefore analysis in the stable effect of high slope which is caused by tower under wind load is a very necessary for new topic.Combining an example of high cutting slope in the sixth section of Guang-He high speed road, which power transmission tower stands on top of high slope, and analyzing dynamic stable influence of the high slope. But it is too complicated and there are too much problems in the analysis progress, not only referring to vibrated interaction results from wind load to transmission tower, but also involing in interaction between high slope and transmission tower which caused by transmission tower vibration. It is nesessary to adopt reliability theory and methods in order to reflect practical situation in engineering and get more pricise result. The text is adopted finite element microsoft ANSYS to built model which includes transmission tower and high slope and calculate with finite element method. Transmission tower is tall and flexibility which causes it is sensitive to wind load, consequently simulation of wind load is the key to analysis of transmission tower and line. The paper is based on Devonport theory, employed CAWS(Constant Amplitude Eave Superposition) and adopted software MATLAB to simulate wind speed time series and wind load time series. Then wind load time series is loaded on transmission tower model in ANSYS. The transmission tower and line model considers coupling function between transmission tower and line, while transmission line is applied to added mass method and transmission tower is treated with beam element. Vibration caused by transmission tower under wind load passes to slope through nonlinear contact interface between foundation pile and soil, it would lead to disturbance in slope.Finally conditions of slope and cutting slope under or not under wind load were calculated and analyzed, and results were compared to get influence in disturbanced slope under wind load. The conclusions in the paper which is wished to refer to actual project cases. |
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