Piled Raft Foundation System for Tall Buildings

Gamage, B. G. S. T.; Kiriparan, B.; Waduge, B; Fenrnado, W. J. B. S.; Mendis, Priyan

doi:10.1007/978-981-15-7222-7_30

Cited by 2 publications

(2 citation statements)

References 2 publications

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“…To date, the pile-raft foundations are one of the most effective developments in the foundation engineering field [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19]. They successfully apply in the design of multi-storey facilities on sites with unfavorable geological conditions, so far as they have an increased bearing capacity [2,[20][21][22][23][24]. However, in recent times, it is quite often in the construction of such foundations, there are cases of deviation from design solutions, which can lead, despite their high distribution capacity, to the uneven settlements development and, as a result, damage to the above-ground structures [1,3,[9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Numerical studies of soil base deformations from reconstructed multi-storey building to nearby buildings

2021

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During the building reconstruction with floors addition, there is a need to evaluate the building frame and foundation soil bearing capacity, especially if there are deviations from the design parameters. As a result of the field and numerical studies, we determined the basic change patterns in the stress-strain state of the 12-storey building load-bearing structures with a monolithic reinforced concrete frame due to uneven pile foundation deformation. We also found the influence degree of the existing deviations from the design parameters to the structures bearing capacity. The research results can be applied in reconstruction conditions with a significant increase in the load on the existing load-bearing elements of the building and on the pile foundation.

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Section: Introductionmentioning

confidence: 99%

Numerical studies of soil base deformations from reconstructed multi-storey building to nearby buildings

2021

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“…Zhang et al used a numerical simulation method to analyze the dynamic response of a rock-socketed steel elevated vertical wharf [24]. Gamage took a pile raft foundation as the research object and performed detailed numerical analysis to investigate its load transfer and the influence of various factors on the pile raft behavior [25].…”

Section: Introductionmentioning

confidence: 99%

Side Friction of Rock‐Socketed Piles Involving Thick Sediment

Wang

Zhang

Hao

et al. 2020

Advances in Civil Engineering

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This paper investigates the skin friction transfer characteristics of the rock-socketed section of a rock-socketed pile resting on thick sediment by conducting in situ core-drilling tests and static loading tests. Test results show that when using the impact hole-forming method in weakly cemented soil, a layer of sediment is deposited at the pile bottom. Due to the existence of sediment, when the load reaches a certain value, sudden and large subsidence is observed. This indicates that the end resistance does not contribute to the bearing capacity. Thus, it is not appropriate to consider both end resistance and side resistance in the existing design method of a rock-socketed pile. The bearing capacity of a single rock-socketed pile should be determined according to the side resistance of the soil layer and rock-socketed section only. Numerical analysis is performed to determine the deformation and load-carrying capacity of the pile and the distribution of friction on the sides of the rock-socketed segment. Under a given applied load, small settlement is observed when socketed thickness and rock strength are relatively large. The distribution of side friction of the socketed segment along the vertical direction shows a double-peak saddle shape. When the socketed thickness and rock strength are relatively smaller, the lower peak is higher than the upper peak, and conversely, when the socketed thickness and rock strength are relatively larger, the lower peak is smaller than the upper peak. For a given applied load on the pile top, smaller socketed thickness results in larger settlement and side friction. Due to the thick layer of sediment, the axial force of the rock-socketed segment of the pile gradually decreases along the vertical direction from the applied load on the pile top to zero at the bottom. According to the mechanical properties at different shear stages, a function is derived for the complete constitutive model for a pile-rock interface. Analytical solutions for the friction of a single pile are obtained under the conditions of failure and elasticity deformation of the surrounding rock. Its load transfer equation is derived as well. Accordingly, an equation is proposed for calculating the bearing capacity of rock-socketed piles resting on sediment at the bottom.

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Piled Raft Foundation System for Tall Buildings

Cited by 2 publications

References 2 publications

Numerical studies of soil base deformations from reconstructed multi-storey building to nearby buildings

Numerical studies of soil base deformations from reconstructed multi-storey building to nearby buildings

Side Friction of Rock‐Socketed Piles Involving Thick Sediment

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