Development and Application of Backfill Material for Reducing Ground Subsidence

지반함몰 저감을 위한 하수관로 뒤채움재 개발 및 현장적용성 평가

Lee, Dae-Young;Kim, Dong-Min;Ryu, Yong-Sun;Han, Jin-Gyu

  • Received : 2015.11.22
  • Accepted : 2015.12.23
  • Published : 2015.12.30


In this study, sewer backfill material was developed to prevent sewer damage and ground subsidence. Laboratory test was performed in the field of CA replacement ratio, accelerator type and replacement ratio and W/M. The compression strength of backfill material was 0.55~0.64MPa below in W/M 70% and 0.20MPa over W/B 80%. Ice block was used to simulate the ground cavity and subsidence caused by sewer damage in application study. The existing sand compaction and the new backfill material was comparative estimated in field. The ground settlement of cross section was 23.4cm and that of longitudinal section was 27cm in sand compaction section, but the ground had not sunk in backfill material section.


Sewer;Backfill Material;Plasticity;Cavity;Subsidence


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Cited by

  1. Understanding of Subsurface Cavity Mechanism due to the Deterioration of Buried Pipe vol.32, pp.12, 2016,


Supported by : Ministry of Environment