T/YNANT 14-2025 Active Group standards

T/YNANT 14-2025 Road tunnel advanced geological prediction technical guidelines

Publish Date: 2025-07-11 Implement Date: 2025-08-01 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

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Basic Information

Standard Code: T/YNANT 14-2025

Standard Type: Group standards

Standard Status: Active

is_force_gb: no

CCS Name: -

ICS Name: Geology, meteorology, and hydrology

Publish Date: 2025-07-11

Implement Date: 2025-08-01

Scope

Main technical content: Yunnan Province's highway tunnels generally face complex hydrogeological, engineering geological, and environmental geological conditions, as well as high geological disaster risks. To effectively curb and prevent safety issues caused by groundwater and adverse geological conditions, the "Technical Guidelines for Advance Geological Forecasting of Highway Tunnels in Yunnan Jian Tou Group" were compiled in accordance with relevant norms, the management regulations and documents of the Yunnan Provincial Department of Transportation and Yunnan Jian Tou Group. For more complex geological tunnels, advance geological forecasting units should strictly follow the requirements of the "Notice of the Yunnan Provincial Department of Transportation on Further Strengthening the Mandatory Measures for Advance Geological Forecasting of Highway Tunnels" (Yunnan Transportation Construction Bulletin [2019] No. 158), and conscientiously prepare and submit for approval the implementation rules for advance geological forecasting. Effectively adopt measures such as combining geological surveys and exploration, combining geophysical exploration and drilling, combining medium- and long-distance with short-distance surveys, combining surface and underground surveys, and combining advance guide pits with main tunnel detection to identify the surrounding rock quality, faults, fracture zones, water-rich zones, water gushing and mud flow, and karst and other adverse geological conditions in front of and around the excavation face of tunnels. With the vigorous development of transportation infrastructure projects in Yunnan Province and the group's vigorous efforts in highway engineering construction projects, given the complex geological conditions of Yunnan's highway projects, such as rock fragmentation, karst, gas-bearing strata, and variable rock types, which seriously affect the progress of tunnel construction and pose great safety risks, the compilation of the "Technic