Peculiarities of using small-diameter bored piles for effective solving of geotechnical problems
Article Sidebar
Main Article Content
Abstract
Abstract. The peculiarities of the use of small-diameter drill piles in modern construction considered, with an emphasis on their advantages and areas of application in specific conditions. Two main types of piles distinguished: cast-in-place, which characterized by continuous reinforcement and filling with concrete or cement mortar, and composite, where the load transfers to reinforcing elements. Main advantages of small-diameter bored piles noted, including the possibility of performing work in confined spaces, reducing the level of noise and vibrations, a variety of drilling technologies, the possibility of application in geological conditions of varying complexity, etc.
Particular attention paid to the areas of application of small-diameter bored piles, including the installation of new foundations, underpinning of existing structures, soil improvement and land-slide protection. The main groups of factors that can influence the choice of small-diameter bored piles as the main design decision for various fields of application considered, including:
- physical factors (restricted access, remoteness of the area, distance of piles to existing structures);
- subsoil factors (difficult geological conditions, soil liquefaction tendency);
- environmental factors (sensitivity to vibration/noise, hazardous or contaminated soils);
- necessity of adaptation to existing structures;
- load/settlement requirements;
- economic factors.
Limitations for the use of small-diameter drill piles from the point of view of their efficiency described.
An example of the effective practical use of small-diameter bored piles in the confined conditions of dense urban development in close proximity of metro tunnels with increased requirements regarding the level of vibrations and noise considered. The task of minimizing subsidence of the designed residential and office complex and the impact on surrounding buildings and structures solved. The compliance of the adopted design decisions confirmed by means of field tests, as well as using the results of settlements monitoring. Attention focused on the need for further improvement of design approaches and technological solutions to optimize the efficiency of small-diameter bored piles for solving geotechnical problems.
Article Details
This work is licensed under a Creative Commons Attribution 4.0 International License.
Authors are published in this journal, agree to the following conditions:
Authors reserve the right to authorship of their work and transfer the journal the right of the first publication of this work under the terms of the Creative Commons Attribution License, which allows other persons to freely distribute published work with mandatory reference to authors original work and the first publication of work in this journal.
The authors have the right to enter into independent additional agreements on the non-exclusive dissemination of the work in the form in which it was published by this journal (for example, to post work in the electronic repository of the institution or to publish as part of a monograph), provided that the reference to the first publication of the work in this journal is maintained.
The journal's policy allows and encourages the authors to place the manuscript of the work on the Internet (for example, in the institutions' storehouses or on personal websites), both for presenting this manuscript to the editorial office and during its editorial processing, as this contributes to the creation of productive scientific discussion and positively affects the efficiency and dynamics of citing the published work (see The Effect of Open Access).
References
Гнатюк О. Вплив поширення на несучу здатність буронабивних залізобетонних мікропаль. / О. Гнатюк, М. Лапчук, А. Ви-соченко // Вісник Львівського національно-го аграрного університету. Архітектура і сільськогосподарське будівництво – Львів.: ЛНАУ – 2015 – Вип. 16. – С. 71-76
Менейлюк О. Армування відкосів буро-ін’єкційними палями малого діаметру / О. Менейлюк, О. Попов, І. Бічев, І. Чернов // Армування основ при реконструкції бу-дівель і споруд. Збірник наукових праць. – К.: НДІБК – 2007 – Вип. 66. – с. 141-150.
Bruce D. Drilled and grouted micropiles. State of practice review. Volume 1: Back-ground, Classifications, Cost. / D.Bruce, I.Juran – Springfield, VA.: U.S. Department of Commerce National Technical Service, 1997 – 98 pages.
Armour T. Micropile Design and Construc-tion Guidelines Implementation Manual Pri-ority Technologies Program (PTP) Project. / T. Armour, P. Groneck, J. Keelev, S. Sunil.– Springfield, VA.: U.S. Department of Com-merce National Technical Service, 2000 – 379 pages.
BAUER Spezialtiefbau GmbH – Nordhausen, FA Sonderbohrungen - Kleinbohrverfahren, Niederlassung Nordhausen 2000 – 45 S.
Wellauer R. Kleinbohrpfähle. Injektions-bohrpfähle. Mikropfähle. / R. Wellauer // Mitteilungen der Schweizerischen Gesell-schaft für Boden- und Felsmechanik – Bern, 2005 – Seiten 45-55
ДСТУ Б В.2.1-1-95 (ГОСТ 5686-94) Ґрун-ти. Методи польових випробувань паля-ми. – К: Укрархбудінформ, 1997. – 58 с.
DIN EN 14199:2004. Execution of special geotechnical works — Micropiles – Berlin, CEN/TC 288, 2005. – 49 p.
Hnatiuk O., Lapchuk M., Vysochenko A. (2004) Vplyv poshyrennya na nesuchu zdatnistʹ buronabyvnykh zalizobetonnykh mikropalʹ. [The enlarged toe influence for the bearing capacity of bored reinforced concrete micropiles]. Visnyk Lʹvivsʹkoho natsionalʹnoho ahrarnoho universytetu. Arkhitektura i silʹsʹkohospodarsʹke budivnytstvo . Lviv: LNAU, 16, 71-76 (in Ukrainian).
Meneyliuk O., Popov O, Bichev I., Chernov I.. (2007) Армування відкосів буро-ін’єкційними палями малого діаметру [Re-inforcement of slopes with small diameter injected bored piles]. Armuvannya osnov pry rekonstruktsiyi budivelʹ i sporud. Zbirnyk naukovykh pratsʹ. - Kyiv: NDIBK, 66, 141-150 (in Ukrainian).
Bruce D., Juran I. (1997). Drilled and grouted micropiles. State of practice review. Volume 1: Background, Classifications, Cost., Springfield, VA.: U.S. Department of Com-merce National Technical Service, 1997 – 98 pages (in English).
Armour T., Groneck P., Keelev J., Sunil S. (2000) Micropile Design and Construction Guidelines Implementation Manual Priority Technologies Program (PTP) Project. Spring-field, VA.: U.S. Department of Commerce National Technical Service, 2000 – 379 pag-es (in English).
BAUER special foundations construction company. Small diameter drilling technolo-gy. (2000) Nordhausen, FA Sonderbohrung-en - Kleinbohrverfahren, Niederlassung Nordhausen 2000 – 45 S. (in German).
Wellauer R. (2005). Small diameter bored piles. Injection piles. Micropiles. Announce-ments from the Swiss Society for Soil and Rock Mechaniсs, Bern, p 45–55 (in Ger-man).
DSTU B V.2.1-1-95 (GOST 5686-94) (1997) Grunty. Metody polovykh vyprobuvan pali-amy [Soils. Field test methods with piles]. Kyiv: Ukrakhbudinform, 58 (in Ukrainian).
CEN/TC 288 (2005). DIN EN 14199:2004. Execution of special geotechnical works — Micropiles, Berlin, 49 (in English).