5.2.1 Geological inspection of surrounding rocks of caverns mainlyincludes the followings.(1) Excavation progress, procedures, methods, techniques and theirinfluences on surrounding rocks.(2) Distribution and nature of strata (mainly soft rocks and swelli...[繼續閱讀]

    5.3.1 The following samples, based on requirements, may becollected and kept during construction for reference.(1) Representative rock samples.(2) Fault rocks, weak layers (belts), dikes, altered rocks, specialrocks/soils, and fillings of karst caves.5.3....[繼續閱讀]

    5.4.1 Advance explorations shall be performed with boreholes,geophysical prospecting and other means for deeply buried tunnels,long tunnels and large-scale underground caverns with complicatedgeological conditions; advance geological prediction on thesche...[繼續閱讀]

    5.5.1 Geological logging shall be performed for main subsurfacestructures and diversion tunnels after formation of final excavatedsections; geological data shall be collected for auxiliary tunnels likeaccess tunnels, construction adits, ventilation tunnel...[繼續閱讀]

    5.6.1 Various investigating, testing and monitoring data as well asgeological results shall be comprehensively utilized, and theengineering geological assessment shall be updated along with theunderground excavation.5.6.2 Engineering geological assessment...[繼續閱讀]

    6.1.1 Seepage control works mainly refer to seepage prevention,leakage control, drainage and pressure relief for rock/soil mass. Thespecific measures include impervious curtains, cutoff walls (trenches),impervious blankets, caissons, drainage holes, drain...[繼續閱讀]

    6.2.1 Geological inspection for seepage control works shall includethe followings.(1) Construction procedures, methods, techniques and progress.(2) Geological conditions unveiled by pilot holes.(3) Inrush pressure and volume, and location of water outcrop...[繼續閱讀]

    6.3.1 The following rock/soil samples should be recorded,photographed, videoed and archived for reference.(1) Core samples of rocks at ends of trenches/holes of cutoff wall andin inspection holes.(2) Core samples with cemented filling from grouting inspec...[繼續閱讀]

    6.4.1 Geological prediction shall be conducted and treatmentsuggestions shall be proposed in the following cases.(1) Significant differences from the geological data on which thedesigns are based on.(2) Abnormal water loss, water inrush, mud eruption, san...[繼續閱讀]

    6.5.1 The geological data collection for impervious blankets shallcomply with those in 4.5. The geological data collection for groutingadits, drainage tunnels, relief wells and inspection wells shall complywith those in 5.5.6.5.2 The geological data colle...[繼續閱讀]