Numerical Simulation and Field Measurement Validation of Road Embankment on Soft Ground Improved by Prefabricated Vertical Drains: A Comparative Study

Mamat, Rufaizal Che; Ramli, Azuin; Khahro, Shabir Hussain; Yusoff, Nur Izzi Md.

doi:10.3390/app12168097

Cited by 4 publications

(3 citation statements)

References 19 publications

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“…One type of soil that influences the continued performance of rigid pavement is clay. Clay soil is included in soft soil with several problems, including high compressibility, low porosity, long-term consolidation, and low shear strength, and ultimately is categorized as soil with low bearing capacity [4]. Low-bearing capacity soils can cause severe problems in pavements, such as excessive deformation, ultimately reducing service life and increasing maintenance costs.…”

Section: Introductionmentioning

confidence: 99%

Deflection analysis of rigid pavement on clay soil with vertical drain

Zhafirah,

Yogaswara

2024

E3S Web Conf.

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Rigid pavements are often used on clay soils with long-term settlement history and are subject to damage from traffic loads. It must be analyzed for deflections in rigid pavements built on clay to prevent damage and extend pavement life. If deflection exceeds the permit, the pavement will experience damage. One way to minimize these problems is by installing vertical drains to improve the soil. Installing a vertical drain on the soil can increase the modulus of the subgrade reaction represented as soil- bearing capacity and minimize the potential for pavement deformation. This research aims to analyze the deflection of rigid pavement on clay soil with vertical drains. The finite element method is utilized to analyze the deflection. The pavement is modeled as a 10 m long and 7 m wide slab with thickness variations ranging from 150 mm to 350 mm. Static loads are used to model vehicle loads with load positions at the pavement’s center, ends, and edges. For all slab thicknesses subjected to varying center, end, and edge loads, the maximum deflection of rigid pavement over vertical drain soils is lower than that of soils without vertical drains. It can be concluded that rigid pavement deflection can be reduced using vertical drains for soil improvement.

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Section: Introductionmentioning

confidence: 99%

Deflection analysis of rigid pavement on clay soil with vertical drain

Zhafirah,

Yogaswara

2024

E3S Web Conf.

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“…However, despite improvements in comprehending the behavior of embankment on soft soil in last decade [21][22][23][24], it remains a problem, and it is difficult in geotechnical engineering to estimate the settlement and excess pore pressure (EPP) of improved subsoils with PVDs. Furthermore, field testing is frequently both a time-consuming and expensive process [25].…”

Section: Introductionmentioning

confidence: 99%

2D Numerical Analysis of Prefabricated Vertical Drains Using Different Matching Methods

Théodore,

Demir,

Yildiz

2024

Applied Sciences

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A full-scale embankment on soft clays improved with prefabricated vertical drains (PVDs) have to be analyzed in 3D conditions due to a great number of vertical drains under an embankment. However, 3D analysis is very complex, time-consuming, and needs a powerful computer. Therefore, axisymmetric vertical drains have to be converted into equivalent plane-strain conditions for 2D analysis. Different matching approaches based on unit cell concept have been developed in the literature and the matching can be achieved by modifying the drain distance and/or soil permeability according with relatively simple instructions. This paper investigates verification of three different matching approaches to be used in the numerical analysis of full-scale embankment built on multiple vertical drains. The elasto-plastic soft soil model was used in the numerical analysis, and the results are compared with the laboratory and field measurements. The results of numerical analysis demonstrate that the matching methods are in extremely good agreement with the measurements if the effect of both the smear zone and discharge capacity are taken into consideration. It is seen that these methods provide practical solutions and important advantages to geotechnical engineers.

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“…As a kind of special soil, soft soil is characterized by high water content, strong compressibility, low shear strength, large void ratio, and poor permeability. [1][2][3][4] Embankments built on soft ground commonly face enormous challenges such as large settlement and deformation, slow consolidation, and low stability. [5] Therefore, the stability and settlement of embankments on soft ground are significant issues in geotechnical engineering.…”

Section: Introductionmentioning

confidence: 99%

A Novel Approach to Determine the Treatment Range of Prefabricated Vertical Drains and Cement‐Soil Mixing Piles for Wide and High Embankment on Soft Ground

Jiang,

Hu,

Sun

et al. 2023

Advcd Theory and Sims

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Wide embankments with a width of tens or even hundreds of meters change the settlement distribution mode of soft ground. At the same time, the influence of embankment height on the stability and settlement of soft ground is quite significant. For the wide and high embankments, when the prefabricated vertical drain (PVD) is applied in the middle of the embankment and the cement‐soil mixing pile (CSMP) is implemented on both sides of the embankment, a novel determination approach of the reasonable proportion of the suitable treatment range of the PVD and the CSMP is proposed in this study. Combined with the engineering example of the Sanya Station yard of Hainan East Ring Railway, the Plaxis 2D finite element program is used to carry out the parameter analysis on the different proportions of PVD and CSMP in treatment ranges. It is confirmed that the proportion of the PVD and the CSMP in this project is between 2:3 and 4:1, which is consistent with the final design scheme provided by the design company. The on‐site monitoring results of this site show the effectiveness of the determination approach proposed in this paper.

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Numerical Simulation and Field Measurement Validation of Road Embankment on Soft Ground Improved by Prefabricated Vertical Drains: A Comparative Study

Cited by 4 publications

References 19 publications

Deflection analysis of rigid pavement on clay soil with vertical drain

Deflection analysis of rigid pavement on clay soil with vertical drain

2D Numerical Analysis of Prefabricated Vertical Drains Using Different Matching Methods

A Novel Approach to Determine the Treatment Range of Prefabricated Vertical Drains and Cement‐Soil Mixing Piles for Wide and High Embankment on Soft Ground

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