Jia-ling Huang Tunnel Engineering Geological Conditions Of Research

With the rapid development of high-speed railway in our country, the newly built mountain railway tunnels is higher and higher, a doubling of the number of railway tunnel, railway tunnel construction level has been improved.According to incomplete statistics, as of December 2015, the national railway tunnel, 8778 have been completed, the total mileage of 6506 km, tunnel number and total length were ranked first in the world.Railway tunnel construction is inevitable in the process of encounter various complex geological conditions, often face, strewn at random, slope landslide, collapse, debris flow, rock fall, dangerous rock collapse, rock pile, bedding, earthquake liquefaction, reservoir bank caving, artificial hole, radioactive, harmful gas engineering diseases, etc.Accurately find out the construction project area engineering geological and hydrogeological conditions, to establish the design project of the tunnel, the special geotechnical processing, bad geological renovation, environmental protection, and provide a reliable basis for the establishment of soil and water conservation plan.Paper to lanzhou railway to cooperation with the first new engineering jia-ling huang the engineering geological conditions of the tunnel as the research object, on the regional geological and engineering geological annotation, comprehensive geophysical exploration and drilling, in situ testing of integrated survey data on the basis of detailed analysis, combined with the indoor rock test, soil test, rock mineral test results from the experiment, the water quality analysis, physical and chemical analysis of jia-ling huang tunnel engineering geological conditions has carried on the comprehensive analysis and evaluation, the main content of the paper is as follows:(1)on the basis of jia-ling huang tunnel engineering geology annotation, exploration, in situ testing and laboratory test data, the engineering geological conditions of tunnel through, hydrogeological conditions, poor geology and special geotechnical stability and site into line such as comprehensive analysis and evaluation.(2)study magnetotelluric method, high density resistivity method and measurement of comprehensive logging combining deep within the distributed geophysical exploration method, and will eventually comprehensive geophysical prospecting results section data and the actual drilling and excavation mutual authentication, further check the quaternary, the upper layer thickness and the geological conditions of surrounding rock, segmented tunnel surrounding rock classification is determined.(3)through the jia-ling huang tunnel engineering geological and hydrogeological conditions of the comprehensive analysis, in view of the bad geological condition for the existence of the tunnel through the district, special geotechnical and may occur in the process of tunnel construction, water(mud) and the surrounding rock instability of the main geological problems, the paper puts forward the design and construction of measures should be taken attention.(4) in order to effectively reduce the risk of jia-ling huang a geological disasters in tunnel construction and the harm degree, based on the characteristics of jia-ling huang tunnel environment and advance geological forecast for tunnel design.This article focus on the comprehensive analysis of jia-ling huang tunnel engineering geological problems and research, makes every effort to provide jia-ling huang tunnel design and construction of scientific reference and basis.