• 한국산학기술학회논문지
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• 제13권3호
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• pp.1359-1369
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• 2012

연약지반 상에 설치하는 교대의 말뚝기초는 편재하중으로 인하여 교대의 측방변위가 발생하는 경우 사례가 자주 있다. 본 연구에서는 측방변위가 발생된 국내 ${\bigcirc}{\bigcirc}$교량의 측방유동에 대하여 측방유동지수(F)에 의한 판정법, 측방유동판정수(I), 수정 I지수($M_I$)법에 의한 판정법과 유한요소법으로 판정하였다. 또한 계측관리를 통하여 측방유동의 진행성과 일련의 지반조사, 토질시험을 통하여 측방유동의 원인을 분석한 결과 설계시 예측하였던 압밀에 의한 전단 강도의 증가가 적어 전단강도의 부족으로 인하여 측방유동이 발생한 것으로 판단되었다. 보강방안으로는 압성토와 앵커보강을 병용하는 방안을 선정하였고 그 효용성을 유한요소법을 이용한 수치해석으로 확인하였다.

• The Journal of Korean Physical Therapy
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• 제29권5호
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• pp.241-245
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• 2017

Purpose: This study examined the hip and lumbopelvic movement while the hip was rotating laterally in individuals with chronic low back pain (CLBP). Methods: Sixty healthy subjects and sixty subjects with CLBP were enrolled in this study. Myomotion (Myomotion research pro, Noraxon Inc., German) was used to measure the hip lateral rotation and the lumbopelvic movement. An independent t-test was used to compare the hip lateral rotation and lumbopelvic rotation between the groups. Results: Between healthy males and females, healthy females showed a smaller hip lateral rotation angle (HLRA) than healthy males in the hip lateral rotation test (HLRT). Between the healthy females and females with CLBP, the females with CLBP showed a smaller HLRA and greater lumbopelvic motion than the healthy females in the HLRT, and their lumbopelvic motions occurred earlier during lateral rotation of the hip. Finally, between the males and females with CLBP, the females with CLBP showed a smaller HLRA and greater lumbopelvic motion in the HLRT, and their lumbopelvic motions occurred earlier during lateral rotation of the hip. Conclusion: The results of this study suggest that the CLBP affected the hip lateral rotation, and the lumbopelvic movement depended on gender. In particular, compared to the other groups, the females with CLBP showed a larger lumbopelvic rotation angle and smaller hip lateral rotation angle and lumbopelvic motion occurred early during lateral rotation of the hip.

• 한국지반공학회지:지반
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• 제10권4호
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• pp.53-66
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• 1994

연약지반에 위치한 교대의 기초로서 말뚝기초를 채택할 경우 교대배면의 연약지반에는 측방유동같은 문제등이 빈번히 발생하고 있다. 지반이 측방유동을 일으킬 경우 기초말뚝은 전형적인 수동말뚝임에도 불구하고 교대기초말뚝의 설계시 수동말뚝으로 설계되지 않고 있다. 이러한 이유로는 측방유동의 정확한 판정이 어려운 점과 현재까지 합리적인 설계법이 확립되지 않은점 등을 들 수 있다. 본 연구에서는 측방이동이 발생된 우리나라의 몇몇 교대를 조사하였다. 이 조사에 의거하여 연약지반의 측방유동 판정 및 교대의 측방이동을 예측할 수 있는 판정기준을 제시하고자 한다. 본 연구결과 사면안전율이 말뚝효과를 고려할 결우 1.8이하, 말뚝효과를 무시한 경우 1.5이하에서는 교대측방이동이 발생할 수 있는 것으로 나타났다. 특히 사면안전율이 말뚝효과를 무시한 경우 1.0이하, 말뚝효과를 고려할 경우 1.1 이하에서는 과대한 교대측방이동이 발생하는 것으로 나타났다. 또한 교대의 허용측방이동량을 5cm라고 하면 사면의 소요안전율은 1.4(말뚝효과를 무시한 경우) 혹은 1.6(말뚝효과를 고려한 경우)이상이 되어야 한다.

• 국제초고층학회논문집
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• 제6권1호
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• pp.11-19
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• 2017

High-rise buildings move during construction due to time-dependent material properties of concrete (creep and shrinkage), construction sequences, and structural shapes. The building movements, including vertical and horizontal displacements, result from the sum of axial and lateral deformation of vertical members at each level. In addition to the vertical shortenings, the lateral movement induced by differential shortening can have adverse effects on the construction tolerance and serviceability of non-structural elements such as elevators and curtain walls. In this study a construction stage analysis method is developed to predict lateral movement induced by shortening, including the effect of creep and shrinkage. The algorithm of construction stage analysis is combined with the FE analysis program. It is then applied to predict lateral movement of a 58-story reinforced concrete building that was constructed in Kuala Lumpur, Malaysia. Gravity induced lateral movement of this building is predicted by the construction stage analysis. A field three-dimensional laser scanning survey is carried out to verify the prediction results, and satisfactory agreement is obtained.

• 한국항만학회지
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• 제12권2호
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• pp.337-348
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• 1998

Since 1970s, though many effective construction methods have been established to solve soft ground problems which had occurred in the off shore land reclamation and on shore highway construction, lateral movement of structure on soft ground is still a big problem to engineers. In this study an applicability of criteria for determining the lateral movement of the structure in soft ground is examined and most measured data is obtained from 140 bridge abutments in highway construction sites. Characteristics and effectiveness of existing methods that used for deciding amount of lateral movements of abutment are analyzed using the obtained data. From the analysis, a proper method to prevent lateral movement is proposed. This method is confirmed on several case histories which were constructed on marine clay.

• 한국산학기술학회논문지
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• 제11권5호
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• pp.1799-1804
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• 2010

연약지반 위에 설치된 교대나 옹벽과 같이 성토재하중을 받는 구조물은 연약지반의 과도한 변형 때문에 지반이 수평방향으로 이동하는 측방유동 현상이 발생할 수 있고 이로 인해 많은 피해가 발생할 수 있다. 이 연구에서는 원심모형시험을 이용하여 현장에서 교대 배면부 성토시 발생할 수 있는 교대 측방유동여부를 판단하였고, 교대측방유동에 대한 대책공법으로 압성토 공법을 적용하여 공법적용 후 지반과 교대 구조물에 대한 안정성 여부를 FEM(Finite Element Method)프로그램인 MIDAS/GTS를 이용하여 검토하였다. 원심모형시험 결과 현장에서 예측되는 교대의 수평변위는 허용치(15mm)를 초과하여 발생하였으며, 대책공법으로 압성토 공법 적용할 때 교대는 측방유동에 대해 안정하다는 사실을 수치해석을 통해 알 수 있었다.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2005년도 춘계 학술발표회 논문집
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• pp.1094-1101
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• 2005

The stability of embankment on the soft ground has included problems on stabilities of embanked body and soft soil, which related with vertical displacement and lateral movement of the soft ground especially. The judge methods for the potentialities of lateral movement have been used in order to stabilization assessment during and after construction of the embankment. In this study, the judge methods on the improved soft ground suggested, which compared with exist judge methods on lateral movement. It is due to recent trend using embanked structures on the soft ground most of improved.

• 산업기술연구
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• 제30권B호
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• pp.25-32
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• 2010

In this paper stability about lateral soil movement of bridge abutment constructed on the soft ground, reinforced with the sand compaction pile (SCP) and the preconsolidaton methods, was evaluated by using the centrifuge testing facility which stress conditions in field could be reconstructed in the laboratory. The layouts of model such as ground condition, sand compaction piles and abutment was determined on the basis of similitude law with the reduced scale of 1/200. Construction sequences of installing SCP, preparing reclaimed ground, preconsolidating ground and building the piled bridge abutment were reconstructed during centrifuge modelling and measurements of movement were followed in each sequence. From analyzing the results of measuring movements of the model abutment and the ground, measured lateral movement of model abutment was found to be within the allowable value so that stability of abutment against lateral sliding was secured.

• 한국항만학회지
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• 제14권1호
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• pp.115-124
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• 2000

This study is a suggest a measurement method of lateral displacement, which can be used to judge the stability of bridge abutment on soil undergoing lateral movement. The abutment of bridge on soft foundation makes lateral movement due to the settlement of back fill and lateral flow. To measure the displacement of such a abutment, there are a lot of indirect method for measurement such as survey of leveling or inclinometer gauge around the abutment. But all of them are not sufficient to confirm the ground behavior and measure the exact lateral behavior of structure. As making the structure and pile cooperatively by measuring the movement of lateral displacement, for measuring the abutment displacement precisely by using the inclinometer. In this work, we try to suggest efficient measuring method of abutment displacement and its application.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2004년도 춘계학술발표회
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• pp.698-705
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• 2004

Application of structural load on soft ground can cause lateral movement as well as ground break due to pressing and shearing of ground. Especially, abutment supported by pile foundation can make pile deformed due to lateral movement of ground in order to have harmful effect on structure. According to the result of this study, it is required to consider disturbance of weak soil layer when using lateral movement countermeasure method by EPS construction method as a result of performing study on safety review and EPS construction method with respect to this based on site where lateral movement occurs due to backside soil filling load at bridge abutment installed on weak ground, and it is required to sufficiently consider soil reduction during design of EPS construction method due to lateral movement deformation of soft clay layer by losing ground horizontal resistance force due to plasticity of ground around pile as well as combination part damage with pile head and expansion foundation.