• Title, Summary, Keyword: 지반조사

Search Result 1,518, Processing Time 0.032 seconds

Analysis of Sewer Pipe Defect and Ground Subsidence Risk by Using CCTV and GPR Monitering Results (CCTV 및 GPR을 이용한 하수관로 결함 및 지반함몰 위험성 평가)

  • Lee, Dae-Young
    • Journal of the Korean Geosynthetics Society
    • /
    • v.17 no.3
    • /
    • pp.47-55
    • /
    • 2018
  • Recently, increasing number of urban ground subsidence occurrences has been identified. This situation is mainly due to the increased number of underground cavities. This study is intended to develop the method that prevents ground settlement caused by deteriorated or damaged sewers, which are the main cause of land subsidence. To that end, GPR exploration was conducted using CCTV monitoring of deteriorated sewer at the location with high settlement potential. Through such CCTV monitoring and GPR investigation, abnormal ground behavior was monitored at the site where sewer was damaged, joint was cracked and soil was deposited. According to site investigation in this study, evaluation method using correlation analysis of CCTV monitoring and GPR investigation results is expected to prevent ground settlement attributable to damaged sewer.

GEOTECHNICAL ENVIRONMENT SURVEY (1) (고심도 지반환경 조사 - 지반조사 (1))

  • HoWoongShon;DaeKeunLee;SangKyuKim
    • Journal of the Korean Geophysical Society
    • /
    • v.6 no.4
    • /
    • pp.231-244
    • /
    • 2003
  • Lots of various utilities are buried under the surface of the earth. The effective handling of the underground utilities is becoming the big subject and project for the harmonious management and administration of the city. To detect the position and depth of buried underground utilities, GPR and Induced EM surveys are commonly used. However, they have limitations, such as shallow skin-depth and non-availability in the areas where subsurface materials are not homogeneous and are compose of clays and/or salts and gravels. The aim of this study is to find the efficient geophysical method which can overcome these limitations. For this purpose, various geophysical mehods were applied in the site of poor geotechnical environment.

  • PDF