Piezocone Penetration Testing in Florida High Pile Rebound Soils

Jarushi, Fauzi; Cosentino, Paul J.; Kalajian, Edward H.

doi:10.1179/dfi.2013.7.2.003

Cited by 4 publications

(2 citation statements)

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“…Fauzi Jarushi etc. [3,4,5] research that an equation for predicting rebound, based on R f and u 2 , was developed, and the results showed the ability to predict pile rebound during designate large displacement piles are to be driven. Yang Y. etc.…”

Section: Introductionmentioning

confidence: 99%

The numerical analysis of piles' restriction on foundation

Ren-wang

Zou³

et al. 2016

Teh. vjesn.

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Preliminary noteHow can people predict the sedimentation of tall buildings and analyze the foundation rebound to protect underground utilities? This is the urgent problem in today's construction. To solve it, this paper is dedicated to analyzing how piles affect the foundation rebound value by using Mohr-Coulomb Model and the 3D emulation calculation software FLAC3D with 20-meter-deep foundation pits as an example. The study shows that the distribution pattern of the foundation rebound without piles is a convex curve while piles make the curve go corrugated with the foundation rebound value shrieking by 0,4÷0,6. Also, parameters such as the distance of the piles and diameter of the piles and length of the piles have an effect on the value in a way that the increasing distance lowers the piles' restriction on the foundation rebound value. Therefore, this paper suggests that the largest distance between piles should be no more than 6d when the restricted extent of the value is about 0,23÷0,37. Raising the diameter and length of the piles (no more than 1,25 times of the digging depth) can restrict rebound effectively. Therefore, this paper concludes useful parameters in pile design, proves its mechanism for restriction on foundation rebound, and provides analytical basis for optimization of the piles. Keywords: Mohr-Coulomb Model principle; numerical imitation; piles; rebound Numerička analiza ograničenja pilota kod temeljenjaPrethodno priopćenje Kako je moguće predvidjeti taloženje visokih zgrada i analizirati pomak temelja kako bi se zaštitile podzemne komunalije? To je urgentan problem u današnjoj izgradnji. U svrhu njegovog rješenja, u ovom se radu istražuje kako piloti utječu na vrijednost pomaka temelja primjenom Mohr-Coulomb Modela i 3D računarskog programa FLAC3D s 20 m dubokim iskopima temelja kao primjerom. Analiza pokazuje da je distribucijski uzorak pomaka temelja bez pilota konveksna krivulja, a da s pilotima krivulja postaje valovita uz porast vrijednosti pomaka temelja za 0,4÷0,6. Isto tako parametri poput udaljenosti pilota, promjera pilota i njihove dužine utječu na tu vrijednost na način da veći razmak snižava ograničenje pilota na vrijednost pomaka temelja. Stoga se u radu predlaže da najveći razmak između pilota ne bi trebao biti veći od 6d kad je ograničeni iznos vrijednosti oko 0,23÷0,37. Povećanje promjera i dužine pilota (ne više od 1,25 puta dubine kopanja) može učinkovito ograničiti pomak. Prema tome, u radu se daju korisni parametri za konstrukciju pilota, dokazuje njihovo djelovanje na mehanizam za ograničenje pomaka temelja i pruža analitička osnova za optimizaciju pilota.

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Section: Introductionmentioning

confidence: 99%

The numerical analysis of piles' restriction on foundation

Ren-wang

Zou³

et al. 2016

Teh. vjesn.

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“…According to Jarushi, et al [2], contractors and engineers experience displacement pile installation problems because the pile driving process induces significant excess pore water pressure in the soil. Jarushi, et al [3] also reported a high pile rebound -an upward pile displacement that occurs during the hammer blow -resulting in a minimal permanent set when large diameter displacement piles were driven at five sites with high pore pressure (greater than 1.92 MPa).…”

Section: Introductionmentioning

confidence: 99%

The Effect of TiO2 Coating on Pile Penetration Depth in Clay

Amalia

Asri

Rokhmat

et al. 2017

J. Eng. Technol. Sci.

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Abstract. Pile driving tests were conducted using models of concrete piles with titanium dioxide (TiO 2 ) coating and piles without coating. Pile surfaces coated with TiO 2 become superhydrophilic, which enables water molecules in clay pores to be attracted to the pile during the pile driving process. The attraction suppresses the compression of the pore water in the clay soil, hence the result of the pile driving tests showed that piles with TiO 2 coating could penetrate deeper than piles without coating with the same count of hammer strokes. An examination using FTIR confirmed the formation of bonds between water molecules for piles with coating and the absence of such bonding for piles without coating. Furthermore, it was successfully established that pile surface coating gives different results for pile driving in different clay soils.

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