3d Finite Element Analysis of the Effect of Raft Thickness, Pile Spacing, and Pile Length on the Behavior of Piled Raft Foundation

Cao, Hoa Van

doi:10.21660/2022.98.3434

Cited by 2 publications

(1 citation statement)

References 18 publications

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“…11 The effects of mattress layer number n More mattress layers imply more bamboo mattress thickness. The less significant effects of thickness are supported by previous reports in [18,26,27]. They published both experimental and numerical results to show that raft thickness and rigidity had an insignificant influence on pile raft foundation systems.…”

Section: The Effect Of Bamboo Mattress Layer Number Nsupporting

confidence: 68%

Load Sharing Mechanism of Bamboo Pile Mattress for Reinforced Embankment

Ma’ruf¹

2023

GEOMATE

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In Indonesia, bamboo pile mattress is commonly utilized for reinforced embankments over deep soft soil, especially for shallow ground water table or even over the ground surface as the water functions as timeless preservation for the bamboo. However hardly any articles have been published for design references. This work intends to evaluate bamboo pile mattress for embankment reinforcement numerically by means of Plaxis 2D. A parametric analysis was conducted to assess the effect of both piles spacing s and length L on embankment settlement, stability, and pile load ratio αp. A ratio s/L is introduced to evaluate the combination of s and L effects. Furthermore, normalized settlement S/S∞ and normalized factor of safety SF/SF∞ are proposed to facilitate the assessment, in which S∞ and SF∞ are ones at s/L = ∞ (bamboo mattress with no pile condition). The results show that S/S∞ increases with increasing s/L. Inversely, SF/SF∞ and αp decrease with decreasing s/L. When s and L are increased independently, S/S∞ and SF/SF∞ curves initially follow different paths. When s/L > 0.1 the curves merge into a line. Meanwhile, αp curves blend into a line and separate with a different slope when s/L > 0.1. s/L = 0.1 becomes an onset point to show that L provides more significant effects than s for S/S∞ and SF/SF∞ at s/L < 0.1. However, L produces less influence on αp than s at s/L > 0.1. Furthermore, the findings may provide insight and direction for reinforced embankment design using bamboo pile mattress.

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Section: The Effect Of Bamboo Mattress Layer Number Nsupporting

confidence: 68%

Load Sharing Mechanism of Bamboo Pile Mattress for Reinforced Embankment

Ma’ruf¹

2023

GEOMATE

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Raft Thickness Rational Design for Megatall Skyscrapers: Case Studies

Van

2024

Eng. Technol. Appl. Sci. Res.

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The design process for tall buildings involves three main steps: Estimating roughly the sizes of foundation and superstructure components, verifying the determined sizes with full consideration of the interactions between soil, piles, raft, and superstructure to ensure the bearing capacity and deformation of all elements, and optimizing the design with parametric analysis. However, the thickness of the rafts in existing buildings appears to be very thick and varies to the point of confusion. It is noticeable that some buildings have a considerable height but a relatively small raft thickness and vice versa. To address this issue, a simplified graphical method is proposed to determine the raft thickness for the initial design phase. As megatall skyscrapers become increasingly common, a more comprehensive study of rafts is necessary. This article explores the process of designing and constructing rafts for tall and megatall skyscrapers. The study aims to validate and extend the graphical method and establish a basis for the raft thickness optimization process. The research shows that the number of floors strongly affects the thickness of the rafts. However, the elastic modulus is significantly influenced when the ratio of the raft thickness to the number of floors is less than 5% and vice versa.

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3d Finite Element Analysis of the Effect of Raft Thickness, Pile Spacing, and Pile Length on the Behavior of Piled Raft Foundation

Cited by 2 publications

References 18 publications

Load Sharing Mechanism of Bamboo Pile Mattress for Reinforced Embankment

Load Sharing Mechanism of Bamboo Pile Mattress for Reinforced Embankment

Raft Thickness Rational Design for Megatall Skyscrapers: Case Studies

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