RESEARCH

Geosystems Laboratory

Space Evaluation

10
Numerical analysis of size effect on the deformation behavio… In many construction sites, corrugated pipe is emerging as an effective alternative due to its outstanding constructability and economic feasibility compared to the precast concrete method. Corrugated pipe responds flexibly to external loads and is resilient against brittle fracture. However, during…
9
Non-uniform Segmental Lining Design in Complex Multi-Layered… In engineering practice, a large-diameter shield tunnel frequently extends through the layered ground (Zhao et al. 2007). The behavior of large-diameter tunnels is more complex in the multi-layered ground, but many designs are still constructed assuming that the soil is uniform.
Key paramete…
8
Localized Failure Mechanisms of Linings Induced by Non-Unifo… Thrust force and torqueThe total required thrust was calculated from the reaction force extracted at the reference point where the TBM's node groups are kinematically coupled.The torque is analyzed by summating the vector product of the contact force vector and the position vector from the rotation …
7
Development of in-situ tunnel-ahead detection system using e… During tunnel construction, the unexpected occurrence of anomalies ahead of the tunnel face, such as weak zones, fault zones, and cavities, may cause mechanical failures and ultimately result in casualties. For this reason, various methods to predict the geotechnical ground conditions in advance hav…
6
The quasi-static method as an alternative to dynamic analysi… Surface and underground structures are designed to withstand a certain load in a specific case, accounting for natural disasters such as earthquakes for certain scales. Underground structures tend to receive lower seismic impacts than surface structures. However, natural disasters shouldn’t be under…
5
Development of an elastic and elecromagnetic wave-based 4-D … Research objective
The objective of research is the development of an elastic and electromagnetic wave-based 4-D tomography test system for large soil specimens that is applicable to the characterization of soil behaviors in geotechnical engineering problems.

Reseach content
The…
4
Prediction of the hydraulic conductivity of the rock mass us… In countries like South Korea, various studies to construct tunnels and underground structures are performed due to the existence of many mountains and rock-consisting underground space. Therefore lots of attempts have been tried to characterize the rock and the rock mass. However, it is very diffic…
3
Shear strength estimation of sandy soils using shear wave ve… Typically, shear strength is associated with large strain phenomena, while shear wave propagation is associated with small strain phenomena. Yet, the effective stress and void ratio, both key determinants of sandy soil shear strength, are also primary factors affecting shear wave velocity. This stud…
2
Probabilistic rock mass characterization using shear wave ve… Wave Velocity – Rock Mass Classification Relationships
-Wave velocity – classification parameter relationships derived using QSRC tests and numerical simulation for Q-system and Rock Mass Rating (RMR)
-Consideration of stress conditions and effects of rock joints

Probabilistic F…
1
Health evaluation of the monitoring system for domestic high… Spent nuclear fuels, a by-product of nuclear power generation, contain high levels of heat and radiation, which pose potential risk to the human living environment. They are stored in and managed by either dry or reservoir storage facilities now but 94 % of storage capacity will be filled. The m…

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