Laboratory model study of newly deposited dredger fills using improved multiple-vacuum preloading technique

Liu, Jingjin; Lei, Huayang; Zheng, Gang; Zhou, Haizuo; Zhang, Xuelian

doi:10.1016/j.jrmge.2017.03.003

Cited by 31 publications

(10 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The change in directionality can indirectly reflect the drainage situation and the degree of reinforcement. The change in moisture content and drainage capacity of soil under SVP was examined by Liu et al [22]. The results show that SVP can significantly reduce moisture content in soil, and drainage in SVP is similar to that in TVP, including the rapid growth area, slow growth area, and stable area.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Effectiveness of the Step Vacuum Preloading Method: A Case Study on High Clay Content Dredger Fill in Tianjin, China

Chen

Yuan

et al. 2020

JMSE

View full text Add to dashboard Cite

As a solution to avoid the blockage of the drainage pipe by traditional vacuum preloading, step vacuum preloading (SVP) has been progressively studied. However, the effectiveness of this technique has yet to be systematically analyzed. In this study, an indoor model test was conducted in which vacuum pressure was applied in five stages (10, 20, 40, 60, and 80 kPa) to dredger soil with high clay content at a reclamation site in Binhai New Area, Tianjin, China. The extent of the consolidation effect of the soil was determined, and the effectiveness of the step vacuum preloading method to address drainage pipe blockage was evaluated. The results indicate that soil settlement increases at each stage of vacuum pressure treatment and the degree of vertical consolidation at each stage exceeds 90%. At the end of the treatment stage with vacuum pressure of 80 kPa, the weakly bound water was discharged. Dissipation of pore water pressure occurred in all stages. On the basis of these results, it is shown that SVP can efficiently reinforce dredger fill. Moreover, after SVP, the grain size of the soil and void ratio are still uniformly distributed. Regardless of their location from the drainage pipe, soil exhibits permeability coefficients within the same order of magnitude. The consolidation effect of soil in each stage and the increased drainage rate in the initial stage of vacuum preloading with 80 kPa indicate that the test in the current study can decrease the horizontal displacement of fine particles and can avoid drainage pipe blockage.

show abstract

Section: Introductionmentioning

confidence: 99%

Analysis of the Effectiveness of the Step Vacuum Preloading Method: A Case Study on High Clay Content Dredger Fill in Tianjin, China

Chen

Yuan

et al. 2020

JMSE

View full text Add to dashboard Cite

show abstract

“…Therefore, that method can prevent soil shear failure (Liu et al, 2017), guaranteeing the safety of the treatment process. The vacuum preloading method is also considered to be economical and environmentally friendly (Chai et al, 2010) because it needs no additional materials.…”

Section: Introductionmentioning

confidence: 99%

“…However, recent studies (Liu et al, 2017;Bao et al, 2014;Deng et al, 2018, Zhan et al, 2015 have reported that poor treatment quality was observed when dredged slurry was treated by the vacuum preloading method. In those cases, when the water discharge rate approached zero, the ground soil still showed low bearing capacity generally.…”

Section: Introductionmentioning

confidence: 99%

Consolidation Considering Clogging Effect under Uneven Strain Assumption

et al. 2021

View full text Add to dashboard Cite

show abstract

“…Such machines are used not only in fulfilling the works on deepening the bottom, but also in the construction of channels [12][13][14], retaining walls and piers [15,16], bridges [14] and other objects [2,3,[17][18][19], as well as in the development of all types of soil and mining. Rotary bucket dredgers are used both for dredging [20][21][22][23][24] and for mining operations [6,8,14,15,23,25]. It should be noted that rotary bucket dredgers are effective in the development of various types of soil, but are complex in design, have a large mass and high cost.…”

Section: Introductionmentioning

confidence: 99%

Construction of fairways and reconstruction of channels using rotary-bucket dredgers and calculation of soil-collecting devices

et al. 2021

View full text Add to dashboard Cite

Rotary bucket dredgers are used in various operations: dredging, mining, development of all types of soil. Despite their high weight, cost and complexity of construction, they are increasingly used in underwater soil development due to their versatility and high efficiency. The article presents the developed method for calculating the rotary bucket dredgers, taking into account their placement under water.

show abstract

Laboratory model study of newly deposited dredger fills using improved multiple-vacuum preloading technique

Cited by 31 publications

References 20 publications

Analysis of the Effectiveness of the Step Vacuum Preloading Method: A Case Study on High Clay Content Dredger Fill in Tianjin, China

Analysis of the Effectiveness of the Step Vacuum Preloading Method: A Case Study on High Clay Content Dredger Fill in Tianjin, China

Consolidation Considering Clogging Effect under Uneven Strain Assumption

Construction of fairways and reconstruction of channels using rotary-bucket dredgers and calculation of soil-collecting devices

Contact Info

Product

Resources

About