Lueprasert, Prateep

Loading...
Thumbnail Image
Preferred name
Lueprasert, Prateep
Alternative Name
Lueprasert, P.
Main Affiliation
Email
prateep.lu@kmitl.ac.th

Settings

Now showing 1 - 2 of 2
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Publication,
    INVESTIGATION OF TUNNEL RESPONSE DUE TO THE EFFECT OF ADJACENT LOADED PILE ROW BY 3D SIMULATION ANALYSIS
    (2022-09-01)
    Heama, Narunat
    ;
    Lueprasert, Prateep
    The construction of tunnels for transportation, wastewater, electricity, etc., in the major cities has flourished. In the meantime, other infrastructures such as elevated trains, and flyovers, are continually constructed for urbanization. Under a soft ground condition, they are supported by the pile foundations required pile rows which are possibly located along the existing tunnel. A common challenge encountered in the loaded pile row of the new adjacent structures is inevitably inducing soil stress changes and deformation of existing tunnels. Thus, an assessment of the impact of pile underloading on the integrity of the existing tunnels is essential. The three-dimensional finite element analyses (3D FEA) with two pile conditions were carried out. The tunnel responses (transversal deformation and additional forces) at different transverse sections are presented. The maximum response of those was shown in the monitoring section (center of pile row section). Meanwhile, the torsion deformations are maximum as the 12 – 30 m ( ≈ 1.5Dtunnel - 4.5Dtunnel) away from the center of the pile row. For both short and long pile conditions, the influence zones of loaded pile row in a longitudinal direction are independent of the pile length and extended horizontal distance of 2Dtunnel away from the last pile within a row.
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Publication,
    Comparative effects of adjacent loaded pile row on existing tunnel by 2d and 3d simulation models
    (2021-10-25)
    Heama, Narunat
    ;
    Jongpradist, Pornkasem
    ;
    Lueprasert, Prateep
    ;
    Suwansawat, Suchatvee
    ;
    Jamsawang, Pitthaya
    Selecting suitable simulation methods for complex problems requires a careful balance between the predicted accuracy and computational effort. This research comparatively investigated the effects of adjacent loaded pile row on an existing tunnel in terms of tunnel deformation and lining force, displacement of soil surrounding between tunnel and pile and load transfer of the pile. Simulations were carried out by eight simulation models consisting of 3D finite element (FE) full models (model 1-2); 3D FE symmetry models (model 3-4); and a pile wall in 2D FE models (models 5-8). In loaded pile row simulation, simulations were performed with two pile types: volume pile and embedded pile. In 2D simulation, the 3D pile row was converted into 2D pile wall under plane strain condition by using three transformation methods. The results show that the predicted tunnel responses are adequately accurate as long as the reasonable soil movement behavior can be reproduced. The 2D equivalent dimensions and 2D equivalent axial rigidity are recommended since they provide conservative estimation on both tunnel deformation and lining forces. The 2D equivalent flexural rigidity is not recommended if the pile response is also of concern. The novelty of this research lies in the use and discussion on the applicability of various 2D and 3D models to simulate the effects of adjacent loaded pile row on the existing tunnel, as opposed to previous studies which focused on one or two simulation models.