지하수위와 세립분 함유량에 따른 지반함몰 메커니즘 = Ground Subsidence Mechanism by Ground Water Level and Fine Contents

다국어 초록 (Multilingual Abstract)

Recently, ground subsidence frequently occurs in downtown area. The major causes of the subsidence on the subsurface were the damages of the water supply and sewer pipelines and excavation works in adjacent areas, etc. Because of these various factors, it is not easy to analyze the tendency of occurrence of ground subsidence. The purpose of this study is to clarify the effect of ground subsidence by the change of the fine particle content and ground water level and to establish the ground subsidence mechanism. In this study, a model soil-box was manufactured to simulate the failure of the old sewer pipe which is one of the causes on ground subsidence. And a model test was conducted to investigate the effects of fine contents and ground water level on the cavity occurrence. From the test results, firstly the higher the ground water level, the faster the primary cavity is formed as the seepage stress increases. As a result, the secondary cavity and the ground subsidence rapidly progress due to the relaxation of the surrounding ground. The total amount of discharged soil was decreased as the fine content increased.

참고문헌 (Reference)

1 김진영, "하수관로 건전도와 도로함몰 발생 상관관계 분석" 한국지반환경공학회 18 (18): 31-37, 2017

2 Toda, J., "Void detection around deteriorated old sewer pipelines" 1755-1756, 2003

3 JoongAng-Ilbo, "Songpa, Guro-Sand Ground, Jongno-Old Sewerage, A danger zone of ground subsidence"

4 "Sewerage and Wastewater Management Department, City and Regional Development Bureau, Ministry of Land, Infrastructure, Transport and Tourism, website"

5 Sato, M., "Model tests for the evaluation of formation and expansion of a cavity in the ground" 581-586, 2010

6 Kim, J., "Model test for the observation of cavity formation in sandy ground" Japanese Geotechnical Society Special Publication 64-67, 2016

7 "Ministry of Land, Infrastructure and Transport, Korea"

8 Seoul City, "Identification and management of cavity generation mechanism" 2015

9 Kuwano, R., "Formation of subsurface cavity and Loosening due to defected old sewer pipe" JGS 5 (5): 219-229, 2010

10 Renuka, S., "Formation and evaluation of loosened ground above a cavity by laboratory model test with uniform sand" 211-214, 2011