Test methods for self-weight consolidation coefficient of deposited sediment
GUO Shuai-jie1, 2, ZHANG Fu-hai3, SONG Xu-guo1, 2
1. The Third Railway Survey and Design Institute Group Corporation, Tianjin 300251, China; 2. National Engineering Laboratory for Digital Construction and Evaluation Technology of Urban Rail Transit, Tianjin 300251, China; 3. Institute of Geotechnical Engineering, Hohai University, Nanjing 210098, China
Abstract：The consolidation coefficient in the Terzaghi theory is constant. It will cause significant errors if it is directly applied in the calculation of large strain consolidation of deposited sediment. Meanwhile, it is still extremely difficult to obtain the self-weight consolidation coefficient of deposited sediment. Especially, the sediment deposition and consolidation process can be simulated using the sediment settlement experiment with realtively row initial concentration, and the curves of sediment settlement and deposited layer particle volume fraction also can be obtained accordingly. Based on the sediment settlemen control equations for different settlement stages, the fitted sediment settlment parameters can be determined through the mapping method, and then the self-weight consolidation coefficient of deposited sediment at different consolidation stages can be calculated. According to the change laws of hydraulic conductivity and volumetric compression coefficient, four methods for the consolidation coefficient are discussed, and the the trends and main influence factors are studied.
郭帅杰,张福海,宋绪国. 沉积泥沙自重固结系数测试方法研究[J]. 岩土工程学报, 2017, 39(s1): 69-73.
GUO Shuai-jie, ZHANG Fu-hai, SONG Xu-guo. Test methods for self-weight consolidation coefficient of deposited sediment. Chinese J. Geot. Eng., 2017, 39(s1): 69-73.
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