Study On The Characteristics Of Loess Drainage Under Train Vibration In Xishui New District

XI (An)-XIAN (Yang) New Area i is the second national district in northwest China, as China’s first with innovation and development as the theme of the national district, the future of the new zone of the west salty huge potential for development. Since its inception in 2014, the state formally approved, west salty in all kinds of engineering construction in full swing in the new district. Because the region is located in the WeiHe river basin, the concentrated distribution of multiple streams, and the sedimentary environment is relatively complicated, therefore, there is a potential problem of engineering geology, the threat of economic construction and development of new district. This paper based on the vibration of the loess at home and abroad in the research and experiment. Using the knowledge of geological engineering on the loess along the west salty new city rail transit in question has carried on the preliminary research and experimental work. Article analyzes the west salty district the environment background of loess, the regional tectonic environment and historical data. Combined with the indoor test, and field survey. Long will hold the sine load by dynamic triaxial imposed on undisturbed loess, loess are studied under the special load vibration characteristics. Studied under the different depth, different frequency and dynamic load vibration characteristics. Results show that the vibration of the loess is trap degree decreases with the increase of depth, increases with the increase of vibration frequency, along with the increasing of dynamic stress. By scanning electron microscope, the contrast before and after the vibration in micrograph, the electron microscope results are qualitative and quantitative analysis of the part of, the results show that the vibration of the loess in the pore and grain state before and after there is a lot of change, change is the porosity decreases, and after vibration in particle cementing status more closely. By using MIDAS/NX geotechnical software, on the train move under the load of roadbed dynamic simulation, the results show that the loess embankment under train vibration the following basic not in most of the influence of vibration in the part of embankment above.