Eco-friendly rice straw as vertical drains for dredged slurry treatment as construction fill

Xu, Guangyu; Han, Qiyuan; Wang, Zhenghong; Wu, Jianxin; Yin, Jie

doi:10.1016/j.conbuildmat.2022.128244

Cited by 13 publications

(3 citation statements)

References 23 publications

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“…Environmentally friendly materials have been gradually replacing plastic drainage boards for treating dredged sediment in recent years (e.g., Liang et al,2016;Tang et al,2020;Xu et al,2022). Natural pine wood can be used as a drainage body in combination with vacuum preloading to treat dredged sediment (Jian, 2022).…”

Section: Introductionmentioning

confidence: 99%

“…Cotton stalks have also emerged as highly effective materials for dealing with dredged sediments, with treatment outcomes comparable to those achieved using plastic drainage boards (e.g., Lv, 2017;Yu, 2017;Yu et al, 2020). Additionally, the combination of wheat straw rolls and vacuum preloading has been proven feasible for treating dredged sediment (e.g., Xu et al,2017;Liu et al,2018;Xu et al,2022). Straw drainage systems, serving as eco-friendly materials, align with the national "dual carbon" strategy by effectively converting agricultural waste straw into a valuable resource (e.g., Fang et al, 2019;Yang et al, 2023).…”

Section: Introductionmentioning

confidence: 99%

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Crack development in dredged sediment due to the deformation of vertical drains under intermittent vacuum preloading

Cao,

Xu,

Gao

et al. 2024

Preprint

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The intermittent vacuum preloading in combination with the deformable drainage system method exhibited excellent performance in treating dredged sediment. The contraction and expansion of vertical drainage system caused the formation of cracks on the surface soil. To reveal the mechanisms of crack development, laboratory model box tests were conducted on dredged sediment with different initial water contents (w0) under various expansion strains of vertical drainage system (ε). The study investigated the crack development patterns (e.g., crack number, crack length, maximum crack width, and crack area) on surface soil near the drainage system. The results indicated that the expansion of drainage systems gradually resulted in a radial distribution of soil cracks. The threshold strain values of vertical drainage systems corresponding to the initiation of soil cracks gradually increased, with the increase of w0. The total crack length, total crack area and maximum crack width exhibited a decreasing trend as the w0 increased. This study also identified a critical w0 (w0 < water content at liquid limit) for the formation of cracks on the surface soil. The crack development patterns on the surface soil could be divided into two stages: the slow development stage (ε ≤ 10.0%) and the rapid development stage (ε > 10.0%). The cracks could potentially increase the drainage area, which further enhanced the treatment effect of dredged sediment with high water content.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Crack development in dredged sediment due to the deformation of vertical drains under intermittent vacuum preloading

Cao,

Xu,

Gao

et al. 2024

Preprint

View full text Add to dashboard Cite

show abstract

“…The vacuum preloading method was developed more than 70 years [1] and has played an important role in treating dredged slurry with high fluidity, high water content, high clay content, large compressibility, and low strength [2][3][4][5][6][7]. However, as a long-term practice, the conventional vacuum preloading method has shown some shortcomings [8][9][10][11][12]. For example, the vacuum pressure in the bottom dredged slurry is significantly reduced [10,13], which often leads to inadequate consolidation of the bottom dredged slurry.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on dredged slurry improved by vacuum preloading with top and bottom drainage

Fu,

Lin,

Wang

et al. 2023

Preprint

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The conventional vacuum preloading method is widely used to treat dredged slurry. However, this method cannot fully meet engineering requirements due to the loss of vacuum pressure. To overcome this issue, a method of vacuum preloading with top and bottom drainage is proposed, and the consolidation behavior of this method and the influence of the time ratio (a ratio of bottom vacuum application time to top vacuum application time) on this method are studied through laboratory model experiments. The results demonstrated that compared with the conventional vacuum preloading method, the average vane shear strength of the dredged slurry treated by vacuum preloading with top and bottom drainage increased by 20.6%, and the water content reduced by 6.0%. The time ratio has a significant effect on the consolidation of the dredged slurry, and the optimum time ratio is 1:1. Thus, vacuum preloading with top and bottom drainage can better complete the consolidation of the dredged slurry. In addition, this method can be used to develop a design guide for engineering practice.

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Effects of metakaolin and sodium silicate treatment on highwater content dredged clay for improved construction fill performance

Zhang,

Liu

et al. 2024

Construction and Building Materials

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Eco-friendly rice straw as vertical drains for dredged slurry treatment as construction fill

Cited by 13 publications

References 23 publications

Crack development in dredged sediment due to the deformation of vertical drains under intermittent vacuum preloading

Crack development in dredged sediment due to the deformation of vertical drains under intermittent vacuum preloading

Experimental study on dredged slurry improved by vacuum preloading with top and bottom drainage

Effects of metakaolin and sodium silicate treatment on highwater content dredged clay for improved construction fill performance

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