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1
Content available Effects of full displacement pile installation on the stress and deformation state of surrounding soil: review
Kabeta Worku Firomsa
Archives of Civil Engineering
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2022
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Vol. 68, nr 4
445--466
EN
Several field and model tests have been conducted to investigate the impact of pile installation on bearing capacity. However, little is known about how piles behave during installation, how they interact with the surrounding soil, and how this affects sandy soil properties. This review paper investigates the effect of pile driving on surrounding sandy soil as it compacts sandy soil near to the pile. For this purpose, various related literature was studied based on the observation of the pile installation effect on earth pressure or lateral stress, relative density, and pore water pressure in the sandy soil. A change in the deformation and stress state of surrounding sandy soil due to pile driving was presented. The installation of fully displacement piles can lead to significant stresses and deformations in the surrounding sandy soil. This is one of the main causes of uncertainty in the design and analysis of pile foundations. According to this study, the sandy soil around the pile is compacted during pile driving, resulting in lateral and upward displacement. This leads to the densification effect of pile driving on loose sandy soil. Sandy soil improvement with driven piles depends on pile shape, installation method, and pile driving sequences. This study concludes that in addition to its advantages of transferring superstructure load to deep strata, the increased relative density of loose sand, the change in the horizontal stress, and the influence of compaction on the sandy soil parameters during pile driving should be considered during pile design and analysis.
2
Content available remote Compressive strength of selected fine grained soils treated with cement kiln dust and calcareous fly ash
Knapik-Jajkiewicz Karolina, Gaj Grzegorz, Kowalski Adrian, Prędka Edyta
Architecture Civil Engineering Environment
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2020
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Vol. 13, no. 1
79--86
EN
This paper presents the results of unconfined compressive strength tests carried out on samples of two different fine grained soils mixed with anthropogenic materials produced in Poland, showing binding properties - cement kiln dust and fly ash obtained from combustion of brown coal in a pulverized boiler. The tests were performed on cylindrical samples in a testing machine for compression tests after various curing time ranging from 1 to 8 weeks. The conducted work constitutes the first stage of research devoted to the recognition of the effects of calcareous fly ash and cement kiln dust addition into the fine grained soils.
3
Content available remote Wzmacnianie słabego podłoża kolumnami GEC
Szypcio Z., Dołżyk-Szypcio K.
Materiały Budowlane
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2016
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nr 2
6--7
PL
Wzmacnianie słabych podłoży o dużej miąższości za pomocą kolumn GEC jest racjonalne technicznie, ekonomicznie i ekologicznie. Należy liczyć się jednak ze znacznym osiadaniem i długim czasem konsolidacji podłoża.Wada ta może być znacząco zniwelowana przez prawidłowe zaprojektowanie i wykonanie wzmocnienia. Konieczne jest opracowanie krajowych wytycznych projektowania, wykonania i odbioru poszczególnych etapów robót.
EN
The GEC improvement system is a very effective solution (technically, economically and ecologically) for weak and very weak soils. The GEC system cannot be completely settlement-free. The settlement may be large and the consolidation time may be long. The fault of this system may be eliminated by correct design and realization of improvement. The elaboration of domestic design, realization and reception instructions are necessary.
4
Content available remote Ulepszanie i stabilizacja gruntów spoiwem wapiennym
Gąsiorowski S.
Materiały Budowlane
|
2011
|
nr 4
64-65
5
Content available remote Podbudowy drogowe z kruszyw związanych hydraulicznie w świetle nowych przepisów technicznych
Kraszewski C.
Materiały Budowlane
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2011
|
nr 10
92-94
6
Content available remote Stabilizacja czy wymiana gruntu?
Pożyczka R.
Materiały Budowlane
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2008
|
nr 10
16-16
7
Content available remote Przygotowanie gruntu pod posadzki
Sękowski J.
Materiały Budowlane
|
2000
|
nr 9
12-13
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