Response and Consideration to Geotechnical Issues on Kobe Airport Island Based on the Long-Term Settlement Behavior

Q: What does this research mean for the field?

Geotechnical countermeasures, including settlement prediction methods, ground improvement, and dynamic observation, effectively mitigate uneven settlement and ensure the long-term serviceability of large-scale artificial islands constructed on deep soft ground. Novelty: ClaimNovelty.INCREMENTAL. Consensus alignment: ConsensusAlignment.NEUTRAL.

Katsuhiko Narimoto; Yoshiyuki Yagiura; Kazuhiro ODA; Tamotsu Matsui

doi:10.3208/jgs.21.347

August 31, 2026Japanese Geotechnical JournalOpen Access

Response and Consideration to Geotechnical Issues on Kobe Airport Island Based on the Long-Term Settlement Behavior

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Key Points

To evaluate geotechnical challenges in constructing Kobe Airport Island on variable soft seabed layers and verify the effectiveness of settlement prediction and mitigation countermeasures.
Applied construction-stage and long-term settlement prediction models accounting for variable alluvial and diluvial clay layer thicknesses across the 15–17 m deep seabed.
Implemented ground improvement across the alluvial layer and increased the rigidity of reclamation fill materials.
Conducted real-time dynamic observational monitoring in designated precision measurement zones to evaluate differential settlement and seawall stability.
Ground improvement and fill stiffening successfully suppressed differential settlement across primary airport facilities and stabilized the gently sloped rubble-mound seawall.
Long-term settlement observations validated the predictive models, confirming the structural serviceability and operational safety of the artificial island.

Implication

Geotechnical evaluation reveals effective settlement mitigation and monitoring strategies on Kobe Airport Island, indicating reliable long-term serviceability on deep soft seabeds.

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Cite This Study

Narimoto et al. (2026) studied this question.

synapsesocial.com/papers/6a9934b4636c6408cfa7c74e https://doi.org/10.3208/jgs.21.347

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Response and Consideration to Geotechnical Issues on Kobe Airport Island Based on the Long-Term Settlement Behavior

Key Points

Implication

Abstract

Discussion

Cite This Study

Response and Consideration to Geotechnical Issues on Kobe Airport Island Based on the Long-Term Settlement Behavior

Key Points

Implication

Abstract

Discussion

Cite This Study

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