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Volume 41 Issue 3
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ZHU Sheng, ZHONG Chun-xin, WANG Jing, HE Shun-bin. Experimental study on filling standard of high rockfill dams with soil core[J]. Chinese Journal of Geotechnical Engineering, 2019, 41(3): 561-566. DOI: 10.11779/CJGE201903019
Citation: ZHU Sheng, ZHONG Chun-xin, WANG Jing, HE Shun-bin. Experimental study on filling standard of high rockfill dams with soil core[J]. Chinese Journal of Geotechnical Engineering, 2019, 41(3): 561-566. DOI: 10.11779/CJGE201903019
shu

Experimental study on filling standard of high rockfill dams with soil core

  • 1. State Key Laboratory of Hydrology-Water resources and Hydraulic Engineering, Hohai University, Nanjing 210024, China;
    2. Hydroelectric College, Hohai University, Nanjing 210024, China;
    3. China Power Construction Group Chengdu Survey and Design Institute Co., Ltd., Chengdu 610081, China

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  • Received Date: October 22, 2017
  • Published Date: March 24, 2019
    Graphical Abstract
    • Abstract
  • The monitoring data of high ECRDs have shown that the deformation coordination in dam material zones does not meet the design goal, which is related to the degree of matching in the current specifications of filling for the filtration zone, transition zone and rockfill zone. Based on the fractal theory, the relative density tests on dam shell materials are carried out, and the relative density values are obtained. The filling criteria for the dam shell material zone are discussed. The results show that: (1) Due to its superior gradation and excellent compaction characteristics, the site average porosity rate of the rockfill is 19% and is lower than the design value 21%, but its relative density is only 0.65. (2) The relative densities in the anti-filter zone No. 2, transition zone and rockfill zone are 0.96, 0.75 and 0.65, respectively, and their relative difference may be the main reason for the deformation coordination without achieving the design goal. (3) The compaction function matching technique of indoor and field relative density tests can solve the problem that the relative density of the cushion materials or the cushion materials of the face dam is greater than 1.0. (4) The deformation control of high rockfill dams needs to consider the effect of gradation. The filling design should adopt the double control indices of porosity rate and relative density. The conclusions may provide a reference for the design and construction of high rockfill dams.
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