Energy Piles, Applications and Research Aspects: An Investigation on the Behavior of a Single Energy Pile in Dry Condition

Jafarzadeh, Fardin; Afzalsoltani, Sina

doi:10.1007/978-981-19-7358-1_23

Cited by 2 publications

(1 citation statement)

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“…Some researchers directed their effort to assess the thermal efficiency of energy piles and to reveal the involved parameters [6][7][8][9][10]. Some researchers investigated the behavior of energy piles using field scale tests [11][12][13][14][15] or model scale tests [16][17][18][19][20][21][22][23]. Sutman et al [24] also studied the effect of end and head restraint condition on the behavior of energy piles using a field test and reported that the thermo-mechanical behavior of energy piles, that is to say, axial displacements, mobilized shaft resistance and thermal stresses are highly associated with the restraint conditions on both ends of the pile.…”

Section: Introductionmentioning

confidence: 99%

Pile group behavior under unsymmetrical cyclic thermal loading in dry silty sand: 1g Physical modeling

Jafarzadeh,

Afzalsoltani

2024

Scientia Iranica

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The effect of unsymmetrical thermal loading on the behavior of 2×2 pile groups is studied using 1g physical modeling. Three tests were conducted with 1, 2 and 3 energy piles in each pile group to apply the cyclic unsymmetrical thermal load. Model piles were closed-end aluminum pipes and the model ground was fine-grained dry silty sand, placed in the container with dry tamping technique. 10 successive heating-cooling cycles with amplitude of ±6°C were applied to the energy piles. Displacements and rotations of the cap, axial forces and bending moments along the piles, changes in soil pressure under the pile tip and temperature distribution around the group are monitored and discussed in detail. A new parameter, named as "pile tip behavior index" (I pt ) is introduced to determine the elastic/plastic state of the soil under the pile tip during each test. Results suggest that build-up of plastic zones in the soil under the energy pile during first stages of the unsymmetrical thermal cycling along with redistribution of the mechanical surcharge among different piles of each group may contribute to cause unallowable rotations of the pile cap.

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