Proposed Method for the Design of Geosynthetic-Reinforced Pile-Supported (GRPS) Embankments

Abstract

Soft soils with unfavorable properties can be improved using various ground-improvement methods. Among these methods, geosynthetic-reinforced pile-supported (GRPS) embankments are considered a reliable option for challenging ground conditions and time-bound projects. Nevertheless, the intricate load transfer mechanism of the GRPS embankment presents challenges due to the multiple interactions among its components. To overcome the limitations of current design methods that do not fully account for all interactions, a simplified design method has been developed for GRPS embankments. This method uses numerical analysis to predict pile load efficiency and geosynthetic tension. In this study, a validated model of the GRPS embankment, which incorporates certain simplifications for design purposes, was adopted. Based on this simplified model, a database of load efficiency and geosynthetic tension was collected to derive the design equations. The design method employed six parameters, namely, pile cap width, pile spacing, embankment height, oedometric modulus of the subsoil, geosynthetic stiffness, and embankment fill unit weight. The design process utilized Plaxis 3D and Curve Expert software. The results showed reasonable agreement between the findings of the proposed design method and the field measurements of eight case studies.

Mathematical Modeling of a Corrugated Geogrid and Geocell Reinforced Flexible Pavement Base with Interlayer Shear Performance Analysis

“…The Fig. 16 shows the comparison analysis of load efficiency of the proposed analysis with existing methods such as EBEGO, BS 8006, and CUR 226 [33]. The load efficiency of the proposed system is higher than existing systems.…”

Optimization Analysis of Partition Wall Support Scheme of Multi-Arch Tunnel

“…According to the "Code for Design of Railway Tunnels", the model length was 180.0 m along the Y direction, 82.23 m along the X direction, and 100 m along the Z direction, and the overburden value was 11~23 m. The model was fixed in both vertical and horizontal directions at the bottom, which prevented excessive displacement during the simulation. Furthermore, vertical boundaries were constrained along a horizontal direction to prevent any potential distortion of the results [37]. The mesh size of the tunnel and initial support structure was 1.0 m, and that of the surrounding rock was 4.0 m. Hence, the mesh number was 164,335, and the node number was 904,520.…”

Experimental and Numerical Investigation of Geosynthetic-Reinforced Pile-Supported Embankments for Loose Sandy Soils

“…With the advancement of computer technology and the increase of processing speeds for complex calculations, numerical modeling has become a more accessible and efficient means for calibrating models for use in complicated geotechnical problems [12]. By leveraging the advantages of the finite element method, this study aimed to analyze the behavior of a GRPS embankment and overcome the challenges associated with cost and implementation.…”

“…Buildings 2023, 13, x FOR PEER REVIEW 8 of 20 means for calibrating models for use in complicated geotechnical problems [12]. By leveraging the advantages of the finite element method, this study aimed to analyze the behavior of a GRPS embankment and overcome the challenges associated with cost and implementation.…”

“…Previous design methods for GRPS embankments have mainly concentrated on their application on soft soil foundations, often overlooking the behavior concerning different soil types. These methods have been proposed by researchers such as Hewlett and Randolph [5], Kempfert et al [6], Abusharar et al [7], BS 8006 [8], EBGEO [9], Van Eekelen et al [10], Pham [11], and Alsirawan et al [12].…”