Journal metrics

Journal metrics

  • IF value: 2.281 IF 2.281
  • IF 5-year value: 2.693 IF 5-year 2.693
  • CiteScore value: 2.43 CiteScore 2.43
  • SNIP value: 1.193 SNIP 1.193
  • SJR value: 0.965 SJR 0.965
  • IPP value: 2.31 IPP 2.31
  • h5-index value: 40 h5-index 40
  • Scimago H index value: 73 Scimago H index 73
Volume 18, issue 8 | Copyright

Special issue: Landslide–transport network interactions

Nat. Hazards Earth Syst. Sci., 18, 2261-2271, 2018
https://doi.org/10.5194/nhess-18-2261-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 24 Aug 2018

Research article | 24 Aug 2018

Stability assessment of roadbed affected by ground subsidence adjacent to urban railways

Sang-Soo Jeon1, Young-Kon Park2, and Ki-Young Eum3 Sang-Soo Jeon et al.
  • 1Department of Civil and Urban Engineering, Inje University, Inje-Ro 197, Gimhae City, Kyungsangnam-Do 50834, South Korea
  • 2Smart station research team, Korea Railroad Research Institute, Chuldobakmulgwan-Ro 176, Uiwang City, Gyeonggi-Do 16105, South Korea
  • 3Advanced infrastructure research team, Korea Railroad Research Institute, Chuldobakmulgwan-Ro 176, Uiwang City, Gyeonggi-Do 16105, South Korea

Abstract. In recent years, leakages in aged pipelines for water and sewage in urban areas have frequently induced ground loss, resulting in cavities and ground subsidence, causing roadbed settlement greater than the allowable value. In this study, FLAC3D, which is a three-dimensional finite-difference numerical modeling software, is used to perform stability and risk level assessment for the roadbed adjacent to urban railways with respect to various groundwater levels and the geometric characteristics of cavities. Numerical results show that roadbed settlement increases as the diameter (D) of the cavity increases and the distance (d) between the roadbed and the cavity decreases. The regression analyses results show that, as Dd is greater than 0.2 and less than 0.3, the roadbed is in the status of caution or warning. It requires a database of measurement sensors for real-time monitoring of the roadbed, structures and groundwater to prevent disasters in advance. As Dd exceeds 0.35, the roadbed settlement substantially increases and the roadbed is in danger. Since this may result in highly probable traffic accidents, train operation should be stopped and the roadbed should be reinforced or repaired. The effects of groundwater level on roadbed settlement are examined and the analysis results indicate that roadbed settlement is highly influenced by groundwater levels to an extent greater than even the influence of the size of the cavity.

Download & links
Publications Copernicus
Special issue
Download
Short summary
The number of occurrences of ground subsidence induced by a leakage of aged pipelines for water and sewage in urban areas resulting in various sizes of cavity near the urban railway in South Korea has increased and it may cause roadbed settlement to exceed the allowable value. In this study, a three-dimensional numerical analysis is carried out to estimate roadbed stability and its risk level associated with various groundwater levels and sizes of cavities in simulated ground conditions.
The number of occurrences of ground subsidence induced by a leakage of aged pipelines for water...
Citation
Share