• Title/Summary/Keyword: auger-drilled piling

Search Result 8, Processing Time 0.021 seconds

A Study on the Improvement of Bearing Capacity Prediction Equation for Auger-drilled Piling (매입말뚝공법의 지지력 예측식 개선에 관한 연구)

  • 최도웅;한병권;서영화;조성한
    • Proceedings of the Korean Geotechical Society Conference
    • /
    • 2002.10a
    • /
    • pp.382-389
    • /
    • 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.

  • PDF

Bearing Capacity Characteristics of Auger-Drilled Piling (매입말뚝 공법의 지지력 특성에 관한 연구)

  • Gwak, Soo-Jeong;Seo, In-Seok
    • Proceedings of the Korean Geotechical Society Conference
    • /
    • 2004.03b
    • /
    • pp.3-10
    • /
    • 2004
  • This study set out to analyze the appropriateness of the piling distance installed in weathered layer in the auger-drilled piling method and the reasonable piling distance for the unfinished parts. For that purpose, an investigation was done of the reliability of the dynamic test, the appropriateness of the old bearing capacity formula for the auger-drilled piling, and the quality control measures for obtaining the required bearing capacity.

  • PDF

Design criteria and Case History of Korean Railway for Auger-drilled Pilling (철도분야 매입말뚝 설계기준 및 적용 현황)

  • Lee, Su-Hyung;Choi, Jeong-Hwan;Hwang, Seon-Keun;Eum, Ki-Young
    • Proceedings of the Korean Geotechical Society Conference
    • /
    • 2008.10a
    • /
    • pp.541-548
    • /
    • 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.

  • PDF

Bearing Capacity of In-situ Pile Installed using Pulse Power (펄스파워를 이용한 현장타설말뚝의 지지력 특성)

  • Kim, Tae-Hoon;Chai, Soo-Geun;Jeong, Gyu-Geom
    • Proceedings of the Korean Geotechical Society Conference
    • /
    • 2005.10a
    • /
    • pp.521-527
    • /
    • 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.

  • PDF

A Study of Applicability of PDT(Pulse Discharge Technology) Pile to Kyung-Geon Rail Road and the bedding Construction of a new port in Busan (경전선 복선전철 및 부산신항 노반건설공사 중 PDT말뚝 적용성 연구)

  • Hur, Eok-Jun;Park, Jae-Myung;Yun, Su-Dong;Kim, Tae-Hoon
    • Proceedings of the KSR Conference
    • /
    • 2007.11a
    • /
    • pp.1203-1208
    • /
    • 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.

  • PDF

Characteristics of the Bearing Capacity for New Auger-Drilled Piles (새로운 매입말뚝 공법의 지지력 특성)

  • 백규호
    • Geotechnical Engineering
    • /
    • v.13 no.4
    • /
    • pp.25-36
    • /
    • 1997
  • To increase the bearing capacity of existing auger-drilled piles and decrease the noise and vibration during the installation of the piles, Spirally-reamed and Under-reamed auger trilled piling methods were developed. Field tests were performed to verify the inurement degree of bearing capacity and the constructional possibility of the new augerdrilled piling methods. The test results showed that the bearing capacity of the new augertrilled piles was fairly improved by the grooves of piles, and the skin friction was affected by the groove height and spacing between grooves. It was found that the skin friction takes the great part of total bearing capacity in auger drilled Biles, i.e. 74~80% in case of the existing methods and 81~86% in case of these methods. Moreover, the settlement of spirally-reamed and under reamed piles was smaller than that of the existing augerdrilled pile for the same loading state.

  • PDF

A Study on the reduction effect of noise and vibraton using auger-drilled piling (매입 말뚝공법의 항타공해 저감효과)

  • 박찬국;박용부
    • Proceedings of the Korean Geotechical Society Conference
    • /
    • 1995.10a
    • /
    • pp.1031-1040
    • /
    • 1995
  • Recently, a more strict regulation has become effective on ground vibration and noise induced by construction activities. Consequently the demand for the most widely used method of installing precast piles, i.e. driven piles, is declining. At the same time the demand for low noise and low vibration piling method increased sharply. Currently there are several different low noise and low vibration methods of installing precast piles, mostly preboring method. However, the actual level of ground vibration and noise of these method of construction has not yet been clearly understood. In this paper, through field measurement, suggestion has been made to meet the requirements of the revised regulation.

  • PDF