Performance Prediction of Road Embankment on Soft Soil Stabilized with Prefabricated Vertical Drains Using Numerical Method

Abstract

The case history of a road embankment constructed over soft soil stabilized with prefabricated vertical drains (PVDs) is presented. Modelling very complicated subsoil and structural elements could be assisted by numerical methods. Finite element analysis (FEA) was conducted in this study to verify the effectiveness of PVD modelling in the subsoil utilizing Plaxis 2D. The field settlement data were collected and compared to FEM predicted with different smear effect permeability ratio. Thereafter, predicted settlement data relatively accurate was used in the back-calculated to determine the ultimate settlement with the Asaoka and hyperbolic methods. The ultimate settlement predicted with the smear effects permeability ratio is 6 similar to measured. Asaoka method was found to be reliable in estimating settlement of ground foundation.

Stability Assessment of Embankment on Soft Soil Improved with Prefabricated Vertical Drains Using Empirical and Limit Equilibrium Approaches

“…A possible explanation for these results may be due to the compaction energy that during the first stage of sand cushion filling imposed on the upper layer of soft clay resulting in a higher settlement rate that cannot be modelled. This finding is in agreement with Mamat et al, [17] results that after the consolidation of 70% to 90%, the consolidation rate decreases to a minimum value and enabling second-stage loading is economically and technically feasible. At this point, the additional load will increase the shear strength of the subsoil.…”

“…Due to the rapid growth of software technology and the increasing popularity of the limit equilibrium method in geotechnical engineering, it is now practicable to perform a comprehensive numerical study of the soft soil behaviour stabilized with multiple vertical drains. Two-dimensional plane strain analysis is widely used for simplicity in the field of slope stability [3], [17], [23]. The two-dimensional slope stability analysis of LEM is considered to be a statically indeterminate problem, and an evaluation of the safety factor (FOS) involves assumptions on the internal force distribution [24].…”

“…The main purpose of soft soil consolidation with PVDs is to achieve the required degree of consolidation within a specified period of time. In the classical one-dimensional consolidation Terzaghi's theory [16], consolidation due to vertical drainage is considered only for natural drainage boundaries [17]. In 1948, Barron [18] summarized the one-dimensional reinforcement theory presented a comprehensive solution to the problem of reinforcement for cylindrical-shaped soil with sand drainage in the middle.…”

Numerical Study of the Mechanical Behavior of Polyamide 66 Reinforced by Argan Nut Shell Particles with the Finite Element Method and the Mori-Tanaka Model

“…We can summarize that the Finite Element Method and the Mori-Tanaka Model [24]- [26] are powerful in predicting more complex bio composite behaviors and this bio load compared to other from natural origin (Snail shell, jutes fibers...) will therefore be considered as an alternative for classical loads in order to obtain an environment friendly eco composite with much better mechanical properties.…”

A Deep Learning Approach in Robot-Assisted Behavioral Therapy for Autistic Children

“…Obtaining a high accuracy of emotion detection is the main objective in DL facial emotion detection. In [33], the combination of feature extraction and optimization of face images component analysis has been reported to achieve this goal. Both aforementioned works focus on normal person facial expression.…”