Experimental study on composite flocculant-electroosmosis combined with segmented solidification treatment of high-water-content slurry

He, Bin; Qin, Xinhao; Zhou, Zhiqiang; Xu, Bin; Yu, Songling; Qin, Guanglei; Liu, Kun; Peng, Xiaochuang; Nie, Xiaoqing; Ma, Fuli; Ma, Yingjian; Han, Peide; X, Bai

doi:10.1016/j.conbuildmat.2023.132729

Cited by 4 publications

(1 citation statement)

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“…On the other hand, the low-pressure consolidation characteristics of sediment soil have been extensively studied. For example, Loginov et al [22] discussed the low-pressure compression-permeability characteristics of a bentonite sediment based on a centrifuge model test [20,21,23]; Chen et al [24] claimed that the one-dimensional large strain consolidation of saturated soft materials that are deposited at very low density usually exhibits a time-variant compressibility relation and presents two modifications on two conventional equations for compressibility and permeability, but they did not propose a clear method for calculating the settlement considering low-pressure consolidation characteristics; Qin et al [25] proposed an analytical solution to estimate the settlement by considering the sedimentation and consolidation, but the analytical solution is only applicable to indoor model experimental studies because of the need to obtain the state specifications during the settling process. Apparently, the influence of batch sedimentation and low-pressure consolidation has not been fully considered in the existing settlement calculation methods of VPM-treated dredged-fill foundations.…”

Section: Introductionmentioning

confidence: 99%

Batch Settling and Low-Pressure Consolidation Behaviors of Dredged Mud Slurry: Steady-State Evaluation and Mechanism Study

Bao,

Guo,

Dong

et al. 2023

Water

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Since the exploration of the characteristics of dredged mud slurry during batch settlement and low-pressure consolidation (less than 100 kPa) is still insufficient, the determination of the optimal time to start the vacuum preloading method (VPM) on dredged-fill foundations is still empirically oriented (due to a lack of enough scientific basis). To further explore the characteristics of dredged mud slurry during batch settlement and low-pressure consolidation, samples from typical dredged-fill land projects were obtained and used to conduct batch sedimentation model experiments and low-pressure (less than 100 kPa) consolidation tests. The results of experiments and analyses showed the following: (1) the clay (d < 0.005 mm) content is a main factor affecting the batch settlement and consolidation characteristics of dredged mud slurry, which is not conducive to the consolidation effect of dredged-fill foundations. (2) For dredged mud slurry whose clay content is within 40% to 60%, the cumulative change rate of the average porosity ratio of 60% to 75% is suitable for evaluating the steady state of its batch sedimentation process, i.e., the optimal starting time of VPM. Finally, based on the experimental analyses, a settlement prediction method that considers both the batch sedimentation and the low-pressure consolidation processes was developed and validated.

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