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《Value Engineering》 2019-33
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Study on Dynamic Response Law of High Weathered Basalt High Slope Strengthened by BRFP Anchor Cable Frame

WANG Qiu-yi;TANG Yao-ming;YUAN He-fen;YANG Hong;WU Hong-gang;Yunnan Communications Investment & Construction Group Co.,Ltd.;Yunnan Gongdong Expressway Construction Headquarters;China Northwest Research Institute Co.,Ltd.of CREC;  
The anchor cable frame structure is widely used in slope support engineering. The practical application of the new highstrength material BFRP as the anchor cable is still less. When the composed anchor cable frame is used to reinforce the high slope, the dynamic response problem remains undecided under the action of earthquake. In this paper, using the finite difference software FLAC3 D, a high-weathered basalt high slope of Xiangshui River is taken as the research object, a numerical model is established, considering the important factors such as damping, boundary and input wave, the dynamic response of the slope with or without BFRP anchor cable frame under different working conditions are compared. The results show that: ①After the slope is strengthened by the anchor frame beam, the displacement is reduced by 55.3%, showing a stable trend of "horizontal stratification" gradual convergence in the downward slope direction,and it will reciprocate with the earthquake wave during the earthquake. Exercise has a strong integrity. ②Whether the support or not has a significant effect on the acceleration law of the longitudinal section of the slope is obvious, but the influence on the measurement point near the slope is not obvious. Therefore, when there is a structure on the anchored slope, it should be as far as possible from the slope shoulder.③Under the action of earthquake, the peak force of the anchor cable of the slope top increases the most, and the increase rate of the axial force of the anchorage section is much larger than that of the free section, which will exceed the peak force of the secondary slope anchor cable. When designing and constructing in high-intensity areas, the upper anchor cable standard is lowered, and anchor cable failure may occur during strong earthquakes.
【Fund】: 云南省交通运输厅(云交科教(2017)37号-1)
【CateGory Index】: TU435;TU753.8
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