A Study on Estimation of the Collapse Pattern of Road Sink Using Distinct Element Method

개별요소법을 이용한 도로함몰 붕괴양상 추정에 관한 연구

  • Received : 2019.04.29
  • Accepted : 2019.06.19
  • Published : 2019.06.30


The road sinks in the sewer line or subway section are affected by the ground characteristics. Therefore, it is necessary to accurately identify the relationship between the soil properties and the ground motion in the area where cavities occurred in order to establish a countermeasure against the road sink. In this paper, simulation was performed by using EDEM program, which is one of the Discrete Element Method programs, for sandy soil and clayey soil, which are most common in alluvial deposits, with different locations and sizes of cavities in the underground. As a result, it was found that the sink size occurred more in the sandy soil than in the cohesive soil. Deeper and larger cavity is more likely to occur the road sink In the sand soil model while road sink in the clay model is easy to occur when the cavity is more shallower.

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Fig. 1. Geometry Size setting

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Fig. 3. Cavity volume/model ground depression volume of soil to total volumn

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Fig. 2. Underground Co-location

Table 1. Physical properties of Sandy Soil Model · Clayey Soil Model

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Table 2. Simulation condition table

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Table 3. The pattern of occurrence of ground depression in each model

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