Analysis of the Effects of Soil Parameters and Depth on the Lateral Movement of Soil Improved by Combined PVD-Vacuum Consolidation
DOI:
https://doi.org/10.51988/jtsc.v7i4.744Keywords:
Consolidation, Displacement, Lateral, PVD, VacuumAbstract
One method for improving highly compressible, low-permeability soft soils is the combination of Prefabricated Vertical Drains (PVDs) and vacuum consolidation. Chai et al. (2005) proposed an analytical method for estimating lateral soil movement based on field measurements using inclinometers. However, the model parameter (?) in their method lacks an explicit explanation of its relationship with soil properties and depth. This study aims to investigate the influence of soil parameters and depth on lateral ground displacement by comparing inclinometer measurements from a case study with an enhanced analytical model derived from Chai et al. (2005). The results identify the compression index (Cc) as the most influential soil parameter, while the depth effect (z) is represented by the function f(z) = 0.001z3 - 0.0317z2 + 0.2328z + 0.3345. The proposed model was evaluated against field data using quantitative error metrics, yielding a coefficient of determination (R2) of 0.9710, a mean absolute error (MAE) of 0.0435, and a root mean square error (RMSE) of 0.0482. These results indicate strong agreement with field measurements and relatively low prediction errors. Nevertheless, further validation under different soil conditions is required to establish the model's broader applicability.
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