Journal of Yangtze River Scientific Research Institute ›› 2023, Vol. 40 ›› Issue (10): 103-107.DOI: 10.11988/ckyyb.20220600

• Rock-Soil Engineering • Previous Articles     Next Articles

Experimental Study on Influence of P5 Content of Impervious Gravel Soil Material on Its Engineering Properties for an Ultra-high Earth-Rockfill Dam

ZHENG Xing1,2, YANG Wen-chao1,2, WEI Wei-qiong1,2, AO Da-hua1,2, ZHANG Sheng1,2, XU Yong-wang1,2   

  1. 1. Power China Guiyang Engineering Corporation Limited, Guiyang 550081, China;
    2. Guizhou Province Key Laboratory of Geomechanics and Engineering Safety, Guiyang 550081, China
  • Received:2022-05-26 Revised:2022-07-13 Online:2023-10-01 Published:2023-10-13

Abstract: In this study, soil samples with varying P5 content were prepared for the impervious gravel soil of a 300 m ultra-high earth-rockfill dam. Tests were conducted to investigate the influence of P5 content on the compaction, strength, deformation, and permeability characteristics of the soil samples. The characteristic values of the primary and secondary gravel content for the project were determined as 37% and 60%, respectively. With increasing P5 content, the maximum dry density gradually increased while optimum moisture content decreased. When P5 content ranged from 60% to 75%, the maximum dry density remained stable and did not decrease until the P5 content reached 80%. This stable stage can be attributed to particle breakage. Additionally, as P5 content increased, the compression modulus, shear strength parameters, deformation parameters, and permeability coefficient of the soil gradually increased, while the characteristic hydraulic gradient gradually reduced, and consequently changing the seepage failure mode of the soil.

Key words: impervious gravel soil, P5 content, compaction characteristic, compression modulus, strength parameter, seepage characteristic

CLC Number: