The Stability Analysis Of Slope Which Reinforced By Prestressed Anchor Cables Under Seismic Action

Slope is an inevitable problemon on various kinds of construction projects.So,people is paying more attention to the researches of slope.China is a country that is prone to earthquakes. The earthquake disaster is very frequent in our country. The earthquake disasters is a common geological disaster.Therefore,it is is a significant topic that we study the stability analysis of slopes under seismic load. The article studied and analyzed the stability analysis of slope which was einforced by prestressed anchor cables under seismic load. Fristly, the article discussed the reinforcing mechanism of prestressed cables,and then designed and analysed the slope reinforced by prestressed anchor cables for simple slope model. Secondly, this paper discussed the influencing factors on the stability of slops under seismic load. The article used FLAC 3D to study and analyze the stability analysis of simple slopes which were different gradients and different elastic modulus under seismic load. Finally, the article used FLAC 3D to study and analyze the stability analysis of slope which was located in the bridge axis of Longjiang bridge. under different seismic parameters. The article also used FLAC 3D to study and analyze the stability analysis of Tengchong slope which was einforced by prestressed anchor cables under seismic load. The article selected five different schemes of reinforcement.The schemes included changing space among prestressed anchor cables and the prestress of prestressed anchor cables. Analyzing the effects of these changes. The article draws conclusions as follows:①The Tengchong slope of Longjiang bridge has amplification effect on seismic.The law is that the acceleration amplification factor of slope surface is bigger than the slope internal on the same height.The peak of acceleration amplification factor usually occurs the top of slope.The peak of acceleration more bigger, The peak of acceleration amplification factor more smaller. The change law of acceleration amplification factor is consistent under different earthquake action time. The law of acceleration amplification factor is not very obvious under different earthquake.②When the Tengchong slope of Longjiang bridge under earthquake action,the prestressed anchor cables reinforcement can have influence on the distribution of plastic zone and and stress of slope.The maximum principal stress and the minimum principal stress reduce to varying degrees due to the prestressed anchor cables under earthquake action,which showing that the reinforcement effect of prestressed anchor cable is obvious.③By analysing the influce of different anchor spacings which including, and under earthquake action, the article draws a conclusion that the anchor spacing is an important sensitive factor of the prestressed anchor cables reinforcement under seismic action.The anchor spacing more closer,the horizontal displacement moe smaller.The change of the anchor spacing has little influence on the distribution of the maximum principal stress and minimum principal stress.Only the values changed.The study also finds that the axial force of prestressed anchor cables decreasees as the anchor spacing is decreased.④By analysing the influce of different prestressed anchor prestress which including300 k N,500 k N,700 k N under earthquake action, the article draws a conclusion that the prestressed anchor prestress is an important sensitive factor of the prestressed anchor cables reinforcement under seismic action.The prestressed anchor prestress more greater,the horizontal displacement moe smaller.The change of the prestressed anchor prestress has little influence on the distribution of the maximum principal stress and minimum principal stress.Only the values changed.The study also finds that the axial force of prestressed anchor cables increases as the anchor spacing is increased.