Volume 31 Issue 1
Feb.  2025
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Article Navigation >  Journal of Geomechanics  > 2025  >  31(1): 91-108
YI K X，JOLIVET M，GUO Z J，2025. Tectonic transition and extension at the eastern and western ends of the Altyn Tagh fault: insights from triple junctions[J]. Journal of Geomechanics，31（1）：24−38 doi: 10.12090/j.issn.1006-6616.2024068
Citation: TIAN X W，WANG Y B，ZHU S，et al.，2025. Geological environment and main geological safety challenges in the northern segment of the southeast Xizang (Tibet) power transmission corridor[J]. Journal of Geomechanics，31（1）：91−108 doi: 10.12090/j.issn.1006-6616.2024034
shu

Geological environment and main geological safety challenges in the northern segment of the southeast Xizang (Tibet) power transmission corridor

doi: 10.12090/j.issn.1006-6616.2024034
  • 1.

    Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, China

  • 2.

    State Grid Economic and Technological Research Institute Co., Ltd., Beijing 102209, China

  • 3.

    Key Laboratory of Active Tectonics and Geological Safety, Ministry of Natural Resources, Beijing 100081, China

Funds:  This research is financially supported by the Science and Technology Project of State Grid Corporation of China (Grant No. 5200-202356393A-2-4-KJ).
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    Abstract
  •   Objective  Southeast Xizang(Tibet) boasts a wealth of hydroelectric resources, attributed to its distinctive topography, geomorphology, and climatic conditions. This study aims to safeguard the geological route selection, construction, and operation of the northern segment of the southeast Xizang(Tibet) power transmission corridor.  Methods  We conduct a comprehensive review of literature from both domestic and international sources, and elaborate extensively the regional geological conditions and significant geological safety challenges encountered along the corridor. Furthermore, this study presents sound recommendations for the further disaster identification and monitoring of the southeast Xizang(Tibet) power transmission corridor.   Results  The results are: (1)The transmission corridor in southeast Xizang(Tibet) exhibits pronounced structural activity, well-developed active faults, frequent strong seismic events, notable variations in topography and geomorphology, and distinctive regional geological conditions characterized by structural degradation of rock and soil; all of which have the potential to cause geological safety challenges. (2)The primary geological safety challenges in the northern section of the southeast Xizang(Tibet) power transmission corridor include landslides, collapses, debris flows, snow (ice) avalanches, glacial lake outburst floods, and frost heave settlements. (3)The development of geological safety issues along the route is controlled by extremely steep topography, complex geomorphological conditions, warming and snowmelt due to climate change, intense fault activity, frequent earthquakes, as well as the coupling of internal and external dynamics that induce high-altitude and long-distance disaster chains.  Conclusion  By deeply integrating the advantages of soft measures including InSAR technology, optical remote sensing, UAV photogrammetry, airborne LiDAR technology, and online field monitoring the issues of misinterpretation, oversight, and imprecision in hazard assessment for the southeast Xizang(Tibet) power transmission corridor can be effectively overcome.   Significance  The research establishes a theoretical foundation for the prevention and control of geological safety risks in the planning and implementation of hydroelectric projects in southeast Xizang(Tibet), holding substantial practical value for the sustainable development of the region.

     

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