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2020 Vol.30, Issue 2 Preview Page

Research Article

A Study on the Behavior of Piled Abutment Subjected to Lateral Soil Movement of Soft Ground Improved by Deep Cement Mixing Method

DCM 공법으로 개량된 연약지반의 측방유동을 받는 교대 말뚝기초의 거동 분석에 관한 연구

Yeonho Choi1
,
Gyeongho Kang1*
최 연호1
,
강 경호1*
1Graduated Student, Department of Civil Engineering, Chosun University
1조선대학교 토목공학과 박사과정
*Corresponding Author
30 June 2020. pp. 131-145
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Abstract

The construction on these flimsy ground, activation of unsymmetrical surcharges, can often cause of the embankment road lateral flow or the destruction of the activities. In this study, the stability of the abutment pile foundation installed on soft ground and its behavior has been evaluated. The behavior of the abutment pile foundation under lateral flow was studied by verifying the behavior and reinforcement effects of the abutment pile foundation of previous studies about horizontal loads acting on the pile due to the lateral flow of the ground by performing finite element analysis. As a result of the consolidation analyses, the undrained cohesion or the strength of the soft ground, was increased by about 1.1 to 1.8 times by the increase in the strength of the soft ground according to the degree of consolidation. It is deemed reasonable to use 3.8 cm of the allowable displacement both economically and constructively, but considering the importance of the structure and the uncertainty of the ground, measurement shall be carried out during construction and thorough safety management of the lateral flow should be done.

Keywords
consolidation
pile
soft foundation
abutment
horizontal load

연약지반 상에 도로성토를 시공할 경우 연약지반에는 편재하중이 작용하게 되어 연약지반의 측방유동이나 활동파괴가 종종 발생하게 된다. 본 연구에서는 연약지반에 설치되는 교대말둑기초의 안정성과 말뚝의 거동특성을 파악하는 것이다. 지반의 측방유동으로 인하여 말뚝에 작용하는 수평하중에 대한 기존 연구자들의 연구내용을 파악하고 유한요소해석을 수행하여 교대말뚝기초의 거동특성과 보강효과를 확인하여 측방유동을 받는 교대말뚝기초의 거동을 연구하였다. 압밀도 분석 결과, 압밀 단계에 따라 연약지반 강도증가율에 의해 연약지반의 강도정수인 점착력은 약 1.1~1.8배 증가하였다. 측방유동 검토 결과, 허용수평변위 기준은 3.8 cm를 사용하는 것이 경제적으로나 시공적인 면에서 타당한 것으로 판단되나, 구조물의 중요도 및 지반의 불확실성 등을 고려하여 시공 시 계측을 실시하고 그에 따른 측방유동에 대한 철저한 안전관리가 이루어져야 할 것으로 판단된다.

키워드
압밀
말뚝
연약지반
교대
수평하중
References
1
An, J.P., 1993, A study on the lateral flow in soft soils subjected to unsymmetrical surcharges, The Journal of Engineering Geology, 3(2), 177-190 (in Korean with English abstract).
2
An, J.P., Hong, W.P., 1994, A study on the deformation behavior of soft ground subjected to lateral flow, Journal of the Korea Geotechnical Engineering, 10(2), 25-40.
3
Choi, H.C., 2017, Analysis of lateral flow in highway bridges, MSc Thesis, Chungnam National University, 1-53.
4
De Beer, E.E., Wallays, M., 1972, Forces induced in piles by unsymmetrical surcharges on the soil around the piles, Proceedings of the 5th European Conference on Soil Mechanics and Foundation Engineering, Madrid, 325-332.
5
Franke, E., 1977, German recommendations on passive piles, Proceedings of the 9th International Conference on Soil Mechanics and Foundation Engineering, Specialty Session 10, Tokyo, 193-194.
6
Han, B.W., Son, H.S., Seong, I.C., Baek, Y.G., Lee, G.C., 2010, Case study of characteristics on lateral deformation in soft ground under embankment in the Nakdong river estuary (I), Proceedings of the KGS Spring National Conference 2010, Gyeonggi, 1178-1189.
7
Heo, Y., Park, S.H., Yun, S.H., Kwon, S.O., 2007, Centrifuge modeling on lateral flow of soft soils and displacement of bridge abutment on the composite ground, Journal of the Korea Geo-Environmental Society, 8(5), 39-46 (in Korean with English abstract).
8
Hong, W.P., An, J.P., 1991, The stability of foundation piles for abutment, Journal of the Korean Society of Soil Engineering, 7(2), 67-82.
9
Hong, W.P., Han, J.G., 1994, A study on the lateral movement of soft ground shifts, Journal of the Korea Geotechnical Society, 10(4), 53-66 (in Korean with English abstract).
10
Hong, W.P., Kim, J.H., 2012, Prediction of lateral flow due to embankments for road construction on soft grounds with vertical drains, Journal of the Korean Society of Civil Engineers, 32(6), 239-247 (in Korean with English abstract).
10.12652/Ksce.2012.32.6C.239
11
Ito, T., Matsui, T., Hong, W.P., 1979, Design method for the stability analysis of the slope with landing pier, Soils and Foundations, 19(4), 43-57.
10.3208/sandf1972.19.4_43
12
Jung, Y.G., Kim, H.Y., Lee, J.G., Choi, H.C., Seok, J.U., Lim, S.H., 2016, Reinforcement case of high-speed national road bridge, Geotechnical Engineering, 32(2), 11-18.
13
Kang, M.S., Jeong, S.O., Lim, S.H., 2009, Estimation of settlement caused by lateral displacement by means of the differences of settlements from consolidation theory and field measurement, Journal of the Korea Society of Agricultural Engineers, 51(5), 59-68 (in Korean with English abstract).
10.5389/KSAE.2009.51.5.059
14
Kwon, S.G., 1996, Numerical analysis of lateral flow of soft ground by filling, Msc Thesis, Chonnam National University, 1-87.
15
Lee, B.S., Lee, J.Y., 2012, A case study on the lateral movement of bridge abutment foundation and repair methods, Journal of the Korea Academia-Industrial Cooperation Society, 13(3), 1359-1369 (in Korean with English abstract).
10.5762/KAIS.2012.13.3.1359
16
Marche, R., Chapuis, R., 1974, Measure the shorizontal displacement to check the stability of the embankment, Canadian Geotechnical Journal, 11(1), 182-201.
10.1139/t74-011
17
Shin, J.O., 2000, Estimation standards and measurement management for lateral displacement of road abutment, MSc Thesis, Chonnam National University, 1-55.
18
Tavenas, F., Mieussens, C., Bourges, F., 1979, Lateral displacements in clay foundations under embankments, Canadian Geotechnical Journal, 16(3), 532-550.
10.1139/t79-059
19
Tschebotarioff, G.P., 1973, Lateral pressure of clayey soils on structures, Proceedings of the 8th International Conference on Soil Mechanics and Foundation Engineering, Special Session 5, Moscow, 227-280.
20
Yang, T.S., Song, B.W., 2011, Prediction for liquefaction and lateral flow on non-plastic silt, Journal of the Korea Geo- Environmental Society, 12(11), 65-70 (in Korean with English abstract).
21
Yu, S.G., Kim, J.H., 2011, Experimental study on lateral flow behavior of soft ground due to embankment, Journal of the Korea Geosynthetics Society, 10(1), 43-51 (in Korean with English abstract).
22
Yu, W.G., Kim, G.I., Kim, B.I., 2010, A study on the lateral movement of bridge abutment using centrifuge test and numerical analysis, Journal of the Korea Academia-Industrial Cooperation Society, 11(5), 1799-1804 (in Korean with English abstract).
10.5762/KAIS.2010.11.5.1799
Information
  • Publisher :Korean Society of Engineering Geology
  • Publisher(Ko) :대한지질공학회
  • Journal Title :The Journal of Engineering Geology
  • Journal Title(Ko) :지질공학
  • Volume : 30
  • No :2
  • Pages :131-145
  • Received Date : 2020-04-29
  • Revised Date : 2020-05-21
  • Accepted Date : 2020-05-22
  • DOI :https://doi.org/10.9720/kseg.2020.2.131
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