Laboratory Investigation of Compressibility Characteristics of Dredged Fill in the Qianwan Area Shenzhen
The existing disadvantage of traditional consolidation test apparatus in determining compressibility characteristics of high water content and high compressibility dredged fill is overcome by GDS consolidation test apparatus, which can accurately measure void ratio after consolidation tests under different consolidation pressures. Laboratory consolidation tests are performed on dredged fill of high water content from 110 percent to 150 percent in the Qianwan area Shenzhen by GDS consolidation test systems, the results are shown as follows: compression strain of dredged fill is 24.73 percent under small and first level consolidation pressure, which is approximately half of cumulative compression strain under whole consolidation pressure; Compression parameters including compression coefficient, bulk compression coefficient and compression modulus has a significant variation with void ratio decreasing under consolidation pressure from 6kPa to 400kPa, the variation of which is from several times to a hundred times, and the nonlinear power function relationship of consolidation pressure -void ratio is shown. GDS consolidation test systems will provide an advanced means for determining compressibility characteristic and compression parameters of dredged fill, and the research achievements in this test will provide a theoretical basis for determining nonlinear relationship of consolidation pressure -void ratio and the parameters for finite-strain consolidation behaviors numerical analysis of dredged fill.
M. Zhang et al., "Laboratory Investigation of Compressibility Characteristics of Dredged Fill in the Qianwan Area Shenzhen", Advanced Materials Research, Vols. 261-263, pp. 561-565, 2011