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(사)한국터널지하공간학회

ISSN : 2233-8292

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Vol.21 No.5

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Study on the discharge of soil particles and ground collapse through cracks in underground structures

(사)한국터널지하공간학회 / (사)한국터널지하공간학회, (P)2233-8292; (E)2287-4747
2019, v.21 no.5, pp.699-715
https://doi.org/10.9711/KTAJ.2019.21.5.699



& (2019). Study on the discharge of soil particles and ground collapse through cracks in underground structures. (사)한국터널지하공간학회, 21(5), 699-715, https://doi.org/10.9711/KTAJ.2019.21.5.699

Abstract

Recently, in urban areas, cavities and ground collapse adjacent to underground structures are frequently reported. Several studies on the cavity generation by structure cracks have been made, however they are focused on the cause of cracks and settlement of the ground. In this paper, soil particle and groundwater discharge through pipe cracks and cavity generation mechanism are investigated. The theoretical analysis of the groundwater, which is the main factor of the drainage of the soil particles, and the particle transport mechanism and flow characteristics were investigated. An experimental model test was carried out to identify the mechanism of cavity generation by underground buried pipe cracks. The soil particle weight of discharge through the cracks, and the movement characteristics of the particles were analyzed using PIV. In this study, it is clearly identified that soil particle movements, cavity generation and ground collapse that occur in the ground are basically caused by the movement of groundwater.

keywords
Underground structure, Crack, Groundwater, Soil particle, Ground collapse, 지중구조물, 균열, 지하수, 토립자, 지반함몰

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