Research On Dynamic Response Characteristics Of Highway Rock Slope Blasting

The dynamic stability of slope has been one of the most important problems in geotechnical engineering and earthquake engineering.In the western region of China,the topography is mainly based on the plateau and the mountain.As one of the most effective,economical and convenient construction methods,the blasting has been widely applied to the formation of the high rock slope of the mountain road cutting.The blasting technique is widely applied at the same time,the seismic effect caused by rock high slope excavation blasting process,become one of the important influence factors of slope stability,more and more people begin to pay attention to the research of response characteristics of high rock slope under blasting load of power.This paper combines the "mountain highway disaster monitoring and blasting vibration effect of intelligent technology research" project control,based on the construction of Guiyang(Huaxi)to the blasting construction of Anshun expressway,the flowers on high-speed K86+152 ~ 600 area landform characteristics,and the effect of vibration disaster slope engineering construction problems,the integrated use of the field experiment and investigation,theoretical analysis and numerical simulation methods,through on-site monitoring of blasting vibration on the Rock Slope Blasting Vibration under the action of blasting vibration response characteristics and blasting vibration eigenvalue(velocity,frequency)prediction is analyzed and studied,the main research work and achievements in the following aspects:1.According to the principle of structural dynamics and the propagation law of stress wave,the response mechanism of the height effect of the particle vibration velocity is analyzed.2,through the monitoring data obtained from each line in the field,the evolution law of the blasting vibration characteristic value of the slope excavation is obtained with the change of the explosive charge,the source distance and the height.3)with different prediction methods of blasting vibration characteristic value prediction,through the analysis and comparison of various prediction methods in practical engineering,determine the few samples in good adaptability prediction method,and the use of non symmetric triangular fuzzy function to determine the attenuation parameters of blasting vibration(K,?)probability interval.4)using the process of dynamic response of Rock Slope Blasting numerical simulation software FLAC3 D,the results of numerical calculation,the spatial distribution of further response characteristics of rock slope under blasting vibration velocity,displacement and stress.In general,the topographic features,that is,the slope height and slope change,are one of the important factors affecting the dynamic response of rock slope.In addition,it is necessary to study the dynamics of rock slope,such as the dynamic response of rock slope under the condition of groundwater.