한국농공학회논문집 (Journal of The Korean Society of Agricultural Engineers)

  • 제61권3호
  • /
  • Pages.23-30
  • /
  • 2019
  • /
  • 1738-3692(pISSN)
  • /
  • 2093-7709(eISSN)
한국농공학회 (The Korean Society of Agricultural Engineers)
권호 표지
DOI QR코드

DOI QR Code

매입기초와 토질에 따른 인발저항력 특성

Characteristics of Uplift Capacity of a Embedded Foundation and Soil Type

  • 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)
  • 투고 : 2019.03.13
  • 심사 : 2019.04.09
  • 발행 : 2019.05.31
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

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.

키워드

NGHHCI_2019_v61n3_23_f0001.png 이미지

Fig. 1 Sampling location

NGHHCI_2019_v61n3_23_f0002.png 이미지

Fig. 2 Grain size distribution curve of sampling soils

NGHHCI_2019_v61n3_23_f0003.png 이미지

Fig. 3 Spiral, Top base and Rafter foundation

NGHHCI_2019_v61n3_23_f0004.png 이미지

Photo 1 Test method

NGHHCI_2019_v61n3_23_f0005.png 이미지

Fig. 4 Uplift capacity by regional of spiral foundation

NGHHCI_2019_v61n3_23_f0006.png 이미지

Fig. 5 Uplift capacity by regional of top base foundation

NGHHCI_2019_v61n3_23_f0007.png 이미지

Photo 2 Slip of connector

NGHHCI_2019_v61n3_23_f0008.png 이미지

Fig. 6 Uplift capacity by regional of rafter foundation

NGHHCI_2019_v61n3_23_f0009.png 이미지

Photo 3 Slip of connector

NGHHCI_2019_v61n3_23_f0010.png 이미지

Fig. 7 Comparison of result according to regional soil type

Table 1 Physical properties of soil

NGHHCI_2019_v61n3_23_t0001.png 이미지

Table 2 Mechanical properties of soil

NGHHCI_2019_v61n3_23_t0002.png 이미지

Table 3 Spiral foundation maximum uplift capacity according to embedded depth

NGHHCI_2019_v61n3_23_t0003.png 이미지

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

NGHHCI_2019_v61n3_23_t0004.png 이미지

Table 5 Spiral foundation maximum uplift capacity according to embedded depth

NGHHCI_2019_v61n3_23_t0005.png 이미지

참고문헌

  1. Cho, Y. S., and O. Y. Kwon, 1997. Uplift capacity of a single screw anchor. KSCE Journal of Civil Engineering 17(3): 275-283.
  2. Choi, M. K., S. W. Yun, H. N. Kim, S. L. Lee, C. Yu, and Y. C. Yoon, 2015. Uplift capacity of pipe foundation for single span greenhouse. Protected Horticulture Plant Factory 24(2): 69-78. doi:10.12791/KSBEC.2015.24.2.069.
  3. Lee, B. J., and J. K. Lee, 1999. A study on the critical embedment ratio of screw anchors. The Journal of Industrial Sciences 6: 475-492.
  4. Lee, B. G., S. W. Yun, M. K. Choi, S. Y. Lee, S. D. Moon, C. Yu, and Y. C. Yoon, 2014. Uplift bearing capacity of spiral steel peg for the single span greenhouse. Protected Horticulture Plant Factory 23(2): 109-115. doi:10.12791/KSBEC.2014.23.2.109.
  5. Kim, D. H., and C. S. Yoo, 2013. Pull-out capacity of screw anchor pile in sand using reduced-scale model tests. J. KGS 29(1): 121-133. doi:10.7843/kgs.2013.29.1.121.
  6. Ministry for Food, Agriculture, Forestry and Fisheries (MIFAFF), Rural Development Administration (RDA), 2014. Designated notice of standards to endure disaster for horticultural and special facilities. eds. MIFAFF & RDA, Gwacheon and Suwon, Korea.
  7. Ministry of Agriculture, Food and Rural Affairs (MAFRA), 2018. Present condition of vegetable grown in facilities and vegetable production performance, Korea.
  8. Tanaka, H., M. Fujikawa, T. Matsuzaki, O. Sumikawa, M. Daikoku, and K. Inooku, 2005. Application of a screw type pile for the foundation of greenhouse. Misc. Pub. NARO. West. Reg. Agric. Res. Cent. 3: 21-37.
  9. Yoon, Y. C., K. H. Lee, and C. Yu, 2003. A study on the uplift capacity improvement of pipe-framed greenhouse foundation using circular horizontal anchors. KCID J. 10(2): 55-61.