• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2002년도 가을 학술발표회 논문집
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• pp.382-389
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• 2002

Recently, auger-drilled piling has been widely used in urban area to reduce the air pollution and noise. But this construction method that its basic theory was introduced from Japan may be changed depending on the each piling company and construction field condition. Therefore, the design code and management method for auger-drilled piling is not defined yet. Especially, the lack of research on the bearing capacity of auger-drilled piling leads to the absence of rational bearing capacity prediction equation. This paper presents the optimum design code and economical construction method of the auger-drilled piling by proposing the new bearing capacity prediction equation based on the site specific soil types and construction conditions. In this paper, existing bearing capacity prediction equations and current pile load tests were compared. And the end bearing capacity and skin friction characteristics were also analyzed by comparing the results of CAPWAP. From the results of analysis, a reliable bearing capacity prediction equation considered soil types is proposed.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2005년도 지반공학 공동 학술발표회
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• pp.521-527
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• 2005

In the past decades, complain about ground vibration and noise induced by pile driving has been quickly increased. Because of that, auger drilled piling methods have frequently used specially in urban area. However, the present auger drilled piling methods induce inevitable ground disturbance as well as a certain degree of vibration and noise due to the final hammering. For these reasons, a new auger drilled piling method is required to be developed. This paper introduces PDT(Pulse Discharge Technology) piling method and presents the characteristics of bearing capacity. The PDT piling method is to install in-situ piles using electric power so called Pulse. The pile installed by PDT appears to be able to develop shaft and end bearing capacity efficiently.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2008년도 추계 학술발표회
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• pp.541-548
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• 2008

Active application of auger-drilled piling is expected in Korea considering its advantage in noise and vibration problems against driven piling and its cost-effectiveness in comparison to the cast in-situ piling. The current design practice being used in Korea is adopted from the Japanese one, however the equipment and construction procedure is modified for the geotechnical conditions and construction circumstances in Korea. Therefore there is an urgent need for the establishment of the rational design criteria for the auger-drilled piling in Korea. As the preliminary work for the establishment, this paper presents the current practice in Korean railway constructions. Design criteria of Korea Railway Network Authority are introduced and its characteristics and the problems are described. Application cases of auger-drilled pile to railway construction are introduced as well.

• 한국지반공학회지:지반
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• 제13권4호
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• pp.25-36
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• 1997

기존의 매입말뚝공법이 갖고 있는 문제들, 즉 지지력의 약화와 소음 진동의 발생을 해결하기 위하여 나선돌기형 매입말뚝공법과 선단확대형 매입말뚝공법을 개발하였다. 이들 공법의 시공성과 지지력 증대효과를 알아보기 위하여 현장시험을 실시하였다. 시험결과 극한지지력은 말뚝에 성형된 돌기에 의한 주면마찰력의 증가로 인하여 침설방식보다 약 44%증가하였으며, 주면마찰력은 돌기의 형상과 돌기간의 간격에 의하여 영향을 받는 것으로 밝혀졌다. 그리고 전체지지력에서 주면마찰력이 차지하는 비율은 침설방식의 경우가 74~80%이고 나선돌기 형과 선단확대형의 경우가 81~86% 매입말뚝의 지지력에서 선단지지력이 차지하는 비율은 매우 작았다. 또한 동일 하중에 대한 침하량을 비교한 결과 침설방식보다는 나선돌기형과 선단확대형 매입말뚝의 침하량이 작게 측정되었다.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2007년도 추계학술대회 논문집
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• pp.1203-1208
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• 2007

In the past decades, complain about ground vibration and noise induced by pile driving has been quickly increased. Because of that, auger drilled piling methods have frequently used specially in urban area. However, the present auger drilled piling methods induce inevitable ground disturbance as well as a certain degree of vibration and noise due to the final hammering. For these reasons, a new auger drilled piling method is required to be developed. This paper introduces PDT(Pulse Discharge Technology) piling method and presents the characteristics of bearing capacity. The PDT piling method is to install in-situ piles using electric power so called Pulse. The pile installed by PDT appears to be able to develop shaft and end bearing capacity efficiently. This paper introduces PDT(Pulse Discharge Technology) piling method, which is the 512nd new construction technology. The PDT piling method is to install in-situ piles using electrical power so called Pulse power. The pulse power is physical value that indicates the energy change per unit time(dE/dt). Since the pulse power is to push ground, using the pulse power is enable a hole to be expanded as well as the ground to be improved by compaction. Therefore, The pile installed by PDT appears to be able to develop shaft and end bearing capacity efficiently. In this study, couples of pile loading tests were carried out to figure out whether or not the PDT piling method is applicable to constructions like rail road facility. As a result, it was concluded that the PDT piling technique meet the requirements for such a rail road related construction.

• 한국구조물진단유지관리공학회 논문집
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• 제10권6호
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• pp.213-223
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• 2006

본 연구에서는 화강풍화토 지반에 시공된 PHC 매입말뚝의 지지력의 평가를 위해 인공신경망을 적용하였다. 오류역전파 인공신경망의 적용성을 증명하기 위해 168개의 PHC 매입말뚝의 현장시험 데이터가 사용되었다. 연구결과 오류역전파 인공신경망의 말뚝지지력 평가가 동재하시험결과와 잘 일치함을 보여주었으며, 이러한 결과는 인공신경망을 이용한 PHC 매입말뚝의 지지력 평가가 신뢰성이 있음을 보여준다.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2003년도 봄 학술발표회 논문집
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• pp.153-160
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• 2003

While the interests on the environmental problem during the construction are increasing, the use of low noise-vibration auger-drilled pilling is increasing to solve noise and vibration problem in pilling. Therefore, in Korea, SIP(Soil-Cement Injected Precast Pile) method is mainly used as auger-drilled pilling. However, there is no proper design criteria compatible with the ground condition of Korea, so which is most wanted. To improve and supplement this situation, direct shear tests between SIP pile skin interface and soil were executed on various conditions. Through the analysis of test results, skin resistance characteristics of SIP were investigated thoroughly. Also, the nonlinear unit skin resistance capacity model with SM, SC soil were suggested.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2008년도 추계 학술발표회
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• pp.521-532
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• 2008

The SIP method developed by low noise-vibration from Japan is appropriate to the construction at urban area. However, this method has been misused as a pre-driiled driven pile method in Korea. Hence, Korea Expressway Corporation proposed 'Design & Construction Guideline for the SIP Method' following the original concept of the SIP method at 2004 and 2006. Also construction guideline of another auger-drilled piles were introduced.

• 한국지반환경공학회 논문집
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• 제3권2호
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• pp.15-21
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• 2002

건설공사에서 발생하는 환경문제에 대한 관심이 고조되는 가운데 기성 말뚝을 항타하는 과정에서 유발되는 소음, 진동문제를 해결하기 위해 저소음, 저진동 공법인 매입말뚝공법이 많이 적용되고 있다. 국내에서는 매입말뚝공법으로 SIP공법이 주로 사용되고 있다. 그러나 아직까지 SIP공법에 관한 합리적인 지지력 산정식이 제시되어있지 못한 실정이다. 이에 대해 본 연구에서는 SIP 말뚝의 주면저항력 특성을 고찰하여 이러한 문제점들을 개선, 보완하기 위하여 다양한 조건에서 SIP 말뚝 주면과 지반흙 사이의 경계면에 대하여 직접전단시험을 실시하였다. 그 결과를 토대로 통일분류상 SM, SC 지반에서의 SIP 말뚝 주면저항력 특성을 고찰하고 해당 지반에서 최대주면저항력 산정식을 제시하였다.

• 한국지반환경공학회 논문집
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• 제4권1호
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• pp.59-66
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• 2003

건설공사에서 발생하는 환경문제에 대한 관심이 고조되는 가운데 기성 말뚝을 항타하는 과정에서 유발되는 소음, 진동문제를 해결하기 위해 저소음, 저진동 공법인 매입말뚝공법이 많이 적용되고 있다. 국내에서는 매입말뚝공법으로 SIP공법이 주로 사용되고 있다. 그러나 아직까지 SIP공법에 관한 합리적인 지지력 산정식이 제시되어있지 못한 실정이다. 이에 대해 본 연구에서는 SIP 말뚝의 주면저항력 특성을 고찰하여 이러한 문제점들을 개선, 보완하기 위하여 다양한 조건에서 SIP말뚝 주면과 지반사이의 경계면에 대하여 직접전단 시험을 실시하였다. 시험 결과를 토대로 통일분류상 SM, SC 지반에서의 SIP말뚝 주면저항력 특성을 고찰하고 해당 지반에서 주면저항력 산정식을 제시하였다. 또한, 말뚝 경계요소의 저항력에 대한 새로운 비선형 수치 모델식과 계수산정식을 제안하였다.