Journal of The Korean Society of Agricultural Engineers (한국농공학회논문집)

The Korean Society of Agricultural Engineers (한국농공학회)
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Characteristics of Uplift Capacity of a Embedded Foundation and Soil Type

매입기초와 토질에 따른 인발저항력 특성

  • Lim, SeongYoon (Rural Development Administration, National Institute of Agricultural Sciences) ;
  • Kim, YuYoung (Rural Development Administration, National Institute of Agricultural Sciences) ;
  • Yu, SeokChul (Rural Development Administration, National Institute of Agricultural Sciences) ;
  • Kim, MyeongHwan (Geo Mechanics Technology Group)
  • Received : 2019.03.13
  • Accepted : 2019.04.09
  • Published : 2019.05.31
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Abstract

In this study, we evaluated the applicability of proper embedded depth of fillings by examining the uplift resistance using spiral foundation and top base foundation. As a result of the model test, the maximum uplift resistance increased with the embedded depth. The maximum uplift resistance of each region was found to be 50cm depth. The spiral foundation was 335.14N of Sancheong, 312.32N of Seongju, 403.94N of Wanju, and the top base foundation was 745.06N of Sancheong, 1028.82N of Seongju and 950.76N of Wanju. The yield point after the elastic section in the stress-displacement graph of the top base foundation was calculated as the maximum uplift resistance. For this reason, farmers do not actually use top bases foundation. Therefore, it was considered that the additional load increase due to slip connector will not occur. Model test results show that the maximum uplift resistance increases with the purlinss installed under the ground. Therefore, additional comparative studies through purlins installation will be needed.

Keywords

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Fig. 1 Sampling location

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Fig. 2 Grain size distribution curve of sampling soils

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Fig. 3 Spiral, Top base and Rafter foundation

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Photo 1 Test method

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Fig. 4 Uplift capacity by regional of spiral foundation

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Fig. 5 Uplift capacity by regional of top base foundation

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Photo 2 Slip of connector

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Fig. 6 Uplift capacity by regional of rafter foundation

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Photo 3 Slip of connector

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Fig. 7 Comparison of result according to regional soil type

Table 1 Physical properties of soil

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Table 2 Mechanical properties of soil

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Table 3 Spiral foundation maximum uplift capacity according to embedded depth

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Table 4 Top base foundation maximum uplift capacity according to embedded depth

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Table 5 Spiral foundation maximum uplift capacity according to embedded depth

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