Crucial Geo-Qualities and Predominant Defects Treatment on Foundation Zones of Sino Mainland Xiluodu Arch Dam

Abstract:

Xiluodu arch dam of Xiluodu hydro-junction standing on Jinshajiang River is one of international super-hydropower-projects. Furthermore, this super arch dam lies in peculiarly complicated geographical location where the most dangerous geologies of Southern-western China live. So, the dam foundation condition must meet rigorous requirements on geological stability, mechanical-physical characters and permeability etc. Thereby, the key scientific objects include attitude of foundation surfaces, geological defects of main strata, blasting-excavation-substitution systematic construction for soft geo-layers. Based on practical survey on strata’s lithologic characters and geological structural traits from bank slopes as well as valley bed, researched comprehensively were the dam foundation weathering and unloading condition, the distribution of intra- and inter-formational disturbed belts, compressive belts and parental fissures. Particularly, discussed attentively was their quality assessment. The analyses results showed that the globally initial quality of dam foundation was super one and the local geological defects can be reinforced reliably by substitutive excavation in addition to intense consolidation grouting so as to meet constructive requirements of Xiluodu arch dam. The conclusion is the sophisticated process for blasting construction and comprehensively constructive management system is applicable. The blasting excavation produced smooth and completely split surfaces. The exposed strata’s blasting damage was controlled effectively. The geo-strata’s treatment met generally constructive safety requirements.

• Periodical: Advanced Materials Research (Volumes 446-449)
• Pages: 1997-2001
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.446-449.1997
• Online since: January 2012
• Authors: Ya Jun Wang, Yu Hu, Zheng Zuo, Lu Ping Zhi, Hua Xi Gao
• Keywords: Blasting Damage Control, Dam Foundation Treatment, Lithologic Characters, Sophisticated Process and Management, Super Arch Dam

References

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