Adaptability to geological faulted foundation of Hardfill dam

Abstract

Hardfill dam is a new type of dam which has the advantages of low stress level and even stress distribution in a dam body, resulting in low demands to foundations. Based on 2D linear elastic and elasto-plastic calculations of gravity dam and Hardfill dam using finite element method (FEM), the stress distribution in a dam body and anti-sliding stabilization is analyzed on the geological faulted foundations with weak weathered rock and soft interlayers. It is concluded that Hardfill dams have better adaptability to geological faulted foundations than gravity dams and is more secure and economically sound.

References

1. Raphael J M . The optimum gravity dam. In: Proceedingsof Roller Compacted Concrete III, ASCE, San Diego, California. 1992, 5–19
2. Londe P, Lino M . The faced symmetrical Hardfilldam: a new concept for RCC. InternationalWater Power and Dam Construction, 1992, 44(2): 19–24
3. Hirose T . Designconcept of trapezoid-shaped CSG dam. In: Proceedings of the 4th International Symposium on Roller CompactedConcrete Dams, Madrid. 2003, 457–464
4. Peng Yunfeng, He Yunlong, Xiong Kun . Study on the structure safety of Hardfill dam. China Water Resources, 2007, (21): 55–57 (in Chinese)
5. Peng Yunfeng, He Yunlong, Wan Biao . Hardfill dam––a new design RCC dam. Water Power, 2008, 34(2): 61–63 (in Chinese)
6. Wang Xiaoqiang . Material Dissolution and Engineering Application of Cement Sand andGravel (CSG) Dam. China Institute of WaterResources and Hydropower Research, 2005 :4–5 (in Chinese)
7. Lu Shuyuan, Tang Xinjun . Brief introduction to a newtype of dam called face-plate-cementing rockfill dam. Journal of Yangtze River Scientific Research Institute, 1998, 15(2): 54–56 (in Chinese)
8. Hirose T . Conceptof CSG and its material properties. In: Proceedings of the 4th International Symposium on Roller CompactedConcrete Dams, Madri. 2003, 465–473
9. Tang Xinjun, Lu Shuyuan . Preliminary research on mechanicalbehaviors of cemented rockfill material. Journal of Wuhan University of Hydraulic and Electric Engineering, 1997, 30(6): 15–18 (in Chinese)
10. Wang Tao, Wu Xubin, Zhu Jianmin . Study on selection of foundation base of gravity dam. Hubei Water Power, 2004, (3): 30–32 (in Chinese)
11. Yu Bo, Xu Guangxiang . Thinking about research status &development of dam foundation rock for hydropower projects. GuiZhou Water Power, 2007, 21(1): 1–7 (in Chinese)
12. Design Specification for Concrete Gravity Dams(SL-319-2005), 2005 (in Chinese)
13. Xiong Kun, He Yunlong, Xiao Wei . Numerical analysis of stability of Sanglang arch dam. Engineering Journal of Wuhan University, 2007, 40(4): 22–25 (in Chinese)