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Geotechnical Issues of Megaprojects on Problematical Soil Ground of Kazakhstan
Questions géotechniques de mégaprojets sur sol problématique du Kazakhstan
Zhussupbekov A.Zh., Ling H.I.
Columbia University, New York, USA
Baitassov T.M., Lukpanov R.E., Tulebekova A.S., Yenkebayev S.B.
Eurasian National University, Astana, Kazakhstan
Popov V.N.
KarGIIZ, LTD, Karaganda, Kazakhstan
Krasnikov S.V.
Kazdorproject, LTD, Kazakhstan
Boominathan A.
Indian Institute of Technology, Madras, India
ABSTRACT
:
After the collapse of the Soviet Union, Astana has become the new capital of Kazakhstan. In the past decade, many
modern architectural and engineering megaprojects have emerged (such as Khan-Shatyr, Peace Palace – Pyramid, house estate of
“Severnoe Siyanie”, Abu-Dhabi Plaza Hotel and so on). These modern megaprojects put forward new requirements to engineers utilizing
more economical and technologically effective design and construction methodologies. The territory of the city of Astana is located on
the Kazakh Steppe and the most apparent problem is the soil condition presented by inhomogeneous sandwich soil layers, characterized
by various types of soft and dense soil, and hard soil bands, including freezing ground. At present, pile foundations are widely used, but it
is very hard to use precast piles because they may break in the soil during driving or their heads may be damaged too, while the bearing
capacity is not high. The best geoengineering solution in this case is the use of new pile technology like CFA (continuous flight auger),
FDP (full displacement piles), DDS (drilling displacement system) and H-beam piles, that lead to increased bearing capacity. The present
lecture includes static and dynamic, integrity piling test results and also data of numerical analysis of interaction of piles with soil ground.
RÉSUMÉ : Après l'effondrement de l'Union soviétique, est devenue Astana, la nouvelle capitale du Kazakhstan. Dans la dernière
décennie, de nombreux mégaprojets modernes d'architecture et d'ingénierie ont vu le jour (comme Khan-Shatyr, Palais de la Paix -
Pyramide, immobilier maison d'"Severnoe Siyanie", Abu-Dhabi Plaza Hôtel et ainsi de suite). Ces mégaprojets modernes proposer de
nouvelles exigences pour les ingénieurs qui utilisent conception plus économique et techniquement efficace et méthodes de construction.
Le territoire de la ville d'Astana est situé sur la steppe kazakhe et le problème le plus évident est la condition du sol présenté par
inhomogènes couches de sol sandwich, caractérisées par différents types de sol souple et dense, et des bandes de sols durs, y compris
congélation du sol. À l'heure actuelle, les fondations sur pieux sont largement utilisés, mais il est très difficile d'utiliser des piles
préfabriquées, car ils peuvent se briser dans le sol pendant la conduite ou la tête peut être trop endommagés, tandis que la capacité
portante n'est pas élevé. La meilleure solution dans ce cas, la géo-ingénierie est l'utilisation de la technologie nouvelle pile comme CFA
(tarière continue), FDP (piles déplacement complets), DDS (système de déplacement de forage) et H-beam pieux, qui conduisent à
augmenter la capacité portante. La conférence présente comprend statiques et dynamiques, les résultats de tests d'intégrité des pieux ainsi
que les données de l'analyse numérique de l'interaction avec des tas de terre du sol.
KEYWORDS: pile technology, field and laboratory test, FEM modeling.
1 INTRODUCTION. FIRST LEVEL HEADING
During the last 20 years of independence, in the scopes of
geoengineering, Astana had been grown significantly, many
outstanding megaprojects have been raised for the relatively
short time: Khan-Shatyr, Peace Palace – Pyramid, house estate
of “Severnoe Siyanie”, Abu-Dhabi Plaza Hotel, New Aktau city
near the Caspian Sea and so on, and many other (Zhussupbekov
A.Zh. 2012).
These modern megaprojects put forward new requirements
to engineers and lead to proceed to best geoengineering solution
in this case is the use of new pile technology like CFA
(continuous flight auger), DDS (drilling displacement system)
and H-beam piles. The short information about new and
traditional pile technology are using in Kazakhstan is presented
in Figure 1.
Figure 1. Pile foundations on construction sites of Kazakhstan
It has been mentioned previously that existing Kazakhstan
standard of pile design is out of date and does not meet the
