The Application Of The Comprehensive Advanced Geological Forecast In Xianghe Tunnel

In this paper, Guangtong to Dali railway of Xianghe tunnel geological prediction construction work as the basis to analyze the tunnel construction process typical bad sign for identification and determination of geological tests, describes its possible tunnel geological hazards; and study summarizes the actual project each the basic theory class geological forecast, relevant methods of operation and determine the basis, and then put forward a comprehensive geological prediction tunnel construction process to guide construction.Combined with previous survey report, the tunnel face geological conditions and the use of development law analysis of adverse geological conditions in front of tunnel face disease development, targeted to adjust all kinds of physical exploration process and methods:(1) preparation, to provide geological prediction construction conditions; (2) the length of the combined distance of forecasts, long-range forecast of disease in general category, location, short distance forecasts to guide construction; (3) the detection methods, long-range forecasts by adjusting the short-range forecasting methods and parameters, depending on geological conditions remedy, improve efficiency and accuracy of forecasts; (4) the results of the geological conditions and probe diagram, providing a more accurate geological data in front of wall rock.Xianghe tunnel in Yunnan Province, the audience 10,220 meters, which has long construction period and construction safety risks, designed for high-risk tunnel I grade. This tunnel adopts a comprehensive geological prediction of new technology and methods to detect all kinds of bad geological bodies in front of the tunnel face, including breakage zone, jointed intensive development zone, etc., in the construction process is basically detect the disease in front of tunnel face, construction unit adjust the construction process to provide accurate geological data.