Doohyun Kyung

Estimation of Lateral Load Capacity of Rigid Short Piles in Sands Using CPT Results

Conventional methods for the estimation of the ultimate lateral pile load capacity are typically based on certain expressions of the lateral soil resistance pu and assumed distributions of the lateral soil pressure mobilized along the pile embedded depth. When soils are nonhomogenous, however, the application of conventional methods represents significant difficulties due to the nonlinear and irregular variation of pu with depth. In this study, a cone penetration test (CPT)-based methodology for the estimation of the ultimate lateral pile load capacity Hu was proposed, which can take full account of entire soil profile through the CPT cone resistance qc . A normalized correlation between qc and pu was proposed with correlation parameters corresponding to different existing methods. In order to validate the proposed CPT-based methodology, case examples of laterally loaded piles in various soil conditions were prepared and used to compare values of Hu from original and proposed methods. Calibration chamber ...

Interpretative analysis of lateral load-carrying behavior and design model for inclined single and group micropiles

AbstractIn this study, the lateral load–carrying capacity of micropiles was investigated focusing on the effect of micropile inclination. A series of model load tests was conducted for both single ...

Uplift load-carrying capacity of single and group micropiles installed with inclined conditions

AbstractIn this study, the uplift load-carrying capacity of micropiles was investigated, focusing on the effect of various installation conditions including installation angle (θ), spacing (S), and...

Estimation of In Situ Strength for Sandy Soils Using CPT Cone Resistance

The shear strength of soils is key design property that governs the stability of geotechnical structures. For clays, the undrained shear strength is commonly adopted in design, while the friction angle is a soil property that represents the shear strength of sands. Estimation of these properties is a challenging task, and the challenge is even greater for sandy soils since the strength is highly state-dependent and undisturbed soil sampling is difficult. As a result, various empirical correlations based on in-situ test results, such as SPT and CPT, have been proposed. However, further investigation is still necessary for the consideration of the state-dependent dilatancy and soil constitution. In the present study, a CPT-based method for the estimation of the in-situ strength for granular soils is investigated. Various field variables such as fines content, soil density and confining stress are considered. A series of laboratory test results obtained for various soil conditions are used in the analysis and investigation.