This Specification is formulated with a view to standardizing the technical work of geological prediction of railway tunnels,improving the level of geological prediction and guaranteeing the tunnel construction quality and safety.This Specification is applicable to the geological prediction of new railway tunnels.
1 General Provisions 2 Terms and Symbols 2.1 Terms 2.2 Symbols 3 Basic Requirements 4 Design of Geological Prediction 5 Execution of Geological Prediction 5.1 General Requirements 5.2 Fault Prediction 5.3 Karst Prediction 5.4 Prediction of Coal Seam and Gas 5.5 Others 6 Geological Investigation Method 7 Advance Exploration Drilling Method 7.1 Advance Geological Exploration Drilling 7.2 Exploration by Deepened Blast Holes 8 Geophysical Prospecting Method 8.1 General Requirements 8.2 Elastic Wave Reflection Method 8.3 Electromagnetic Wave Reflection Method 8.4 High-resolution Direct Current Method 9 Pilot Heading Prediction Method Appendix A General Provisions on Safety Protection Appendix B Classification of Geology Complexity Appendix C Portents of Unfavorable Geological Bodies in Tunneling Appendix D Basic Conditions and General Rules of Karst Development Appendix E Basic Classification of Surrounding Rocks of Railway Tunnels Appendix F Geological Outspread Drawing of Tunnel Appendix G Classification of Drillability of Rocks and Soils Appendix H Columnar Section of Borehole Appendix J Design of Observation System for Seismic Wave Reflection Method Explanation of Wording in This Specification