Integrated Prediction Of Surrounding Rock Breaking And Tunnel Gushing In Da-Qinling Tunnel Of The Xi’an-Chengdu High-Speed Railway

With the large-scale construction of long, big, deep tunnels in China’s western terrains region, Tunnel construction process through lots of hydro-engineering and more complex geological background.In order to ensure safe and efficient tunnel construction, geological prediction work becomes extremely necessary. This paper is a combination of Xi’an-Chengdu High-Speed railway Da-Qinling Tunnel hydrogeology, engineering geology background information for research and analysis of tunnel geological prediction work,The expand research mainly focus on the following aspects:1.Combined with the pre-construction survey data to analysis and appraisal the engineering geological conditions such as topography, lithology, geological structure of the large Qinling Tunnel tunnel site.2.Focuses on the regional hydrogeology of the tunnel site, Such as the groundwater storage and cycle characteristics; computing segment inflow and analysising water feature-rich segment on the tunnel site.3.Combined with the hydrogeology and engineering geology background information of the tunnel site, adopting a method which is based on the hydro- engineering geological analysis as the core;adhering to the combination of geophysical and geological analysis,combining the long and short-term forecasting,reasonable arranging for the application of the Tunnel Sesmic Prection,Ground Penetrating Rader and Infrared Water Detecting three kinds of geophysical exploration methods in the tunnel site forecast work,finally,combining with the tunnel site geological conditions and the working face geological sketch datas to the accuracy of information on geological sketch of work ahead of forecast comprehensive judgment,and apply the methods to guide Da-Qinling Tunnel prediction work.4.Aiming at the two geological disasters such as the tunnel surrounding rock collapse and sudden water inflow in the Da-Qinling Tunnel,we build the Fuzzy Comprehensive Evaluation System to comprehensive forecasting analysis and researchThe regional hydrogeological and engineering geological conditions of Da-Qinling Tunnel are complicated. In the process of Da-Qinling Tunnel construction, through more fault zone, near the faults,rock breaking; Groundwater is given priority to with bedrock fissure water, Infiltration-runoff circulation system, in local area,the rock mass is rich in water;In the process of excavation, advance the forecast methods of success to build a set of suitable for dynamic prediction system, the tunnel for the Da- Qinling Tunnel safety, quick construction has provided the technical support and security guarantees.The prediction results of Fuzzy comprehensive evaluation system is consistent with the actual prediction,also once again proved the applicability and scientificity of the dynamic detection system...