Numerical analysis and geomonitoring of behaviour of foundation of Abu-Dhabi Plaza in Nur-Sultan

Buranbayeva, А.; Zhussupbekov, Askar; Omarov, Abdulla

doi:10.1088/1742-6596/1928/1/012033

Cited by 3 publications

(4 citation statements)

References 6 publications

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“…Because of the current state of rapid construction development in Astana, Kazakhstan, and the city heavy summer rainfall, the study specifically examines how rainfall affects the qualities of unsaturated soil in that area. According to Astana's geological distribution, the groundwater table's maximum depth is 10 m, while the average depth is between 2 and 10 m [15]. The length of the pile was accordingly assumed to be the same as the GWT level.…”

Section: Methodsmentioning

confidence: 99%

“…Prior to numerical modeling investigations, the analytical method was performed to serve as an initial estimation before further investigation of the environmental conditions and evaluation of the transient seepage with respect to the suction variation. The environmental conditions were replicated in Astana, Kazakhstan, since groundwater is located near the ground surface and is susceptible to failure due to the highly saturated conditions of the soil here, according to Buranbayeva et al [15]. The soil specimen was created on sand and kaolin, representative of coarse-grained and fine-grained soil, respectively.…”

Section: Introductionmentioning

confidence: 99%

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Analytical and Finite-Element-Method-Based Analyses of Pile Shaft Capacity Subjected to Rainfall Infiltration

Aventian,

Satyanaga,

Sagu

et al. 2023

Sustainability

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The presence of unsaturated soil is critical in geotechnical engineering since the matric suction may aid in accommodating the pile shaft capacity. The design of piles can be optimized by incorporating unsaturated soil mechanics principles. Hence, the amount of waste materials can be reduced, the duration of pile installation can be expedited, and the amount of energy used for casting the pile can be optimized, resulting in more sustainable design and construction of piles. Conventional α, β, and λ methods and modified α, β, and λ methods are the common models that are used for calculating the shaft capacity by incorporating soil–water characteristic curves (SWCCs). However, in our opinion, we feel that the investigation of the influence of seepage infiltration due to rainfall on the shaft capacity of piles, calculated using both analytical means and numerical analysis, has been dealt with inadequately in past studies. The objective of this study is to investigate changes in the shaft pile capacity according to suction changes due to rainwater infiltration for the greater reliability of the pile design, using both analytical and numerical studies with the finite element method (FEM). Sand and kaolin, which are typical components of coarse-grained and fine-grained soil, are used in this study. The laboratory results were incorporated into PLAXIS 3D (Version 22), and a coupled analysis was carried out, utilizing the meteorological conditions in Astana. The results showed that the decreases in matric suction in sand and kaolin are similar after their subjection to rainfall, yet sand produces a higher shaft capacity compared to kaolin. The modified β method offers a higher shaft capacity compared to the other methods due to the effective stress factors being taken into account. The modified α and λ methods are recommended for short piles because they are more sustainable, whilst the modified β method is preferable for long piles. Overall, unsaturated soil conditions should be applied to optimize the foundation design since they generate a higher shaft capacity.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Analytical and Finite-Element-Method-Based Analyses of Pile Shaft Capacity Subjected to Rainfall Infiltration

Aventian,

Satyanaga,

Sagu

et al. 2023

Sustainability

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“…During repeated pile driving, the residual pile stop (refusal) ranged from 0.30 cm to 0.64 cm in the last 10 cm of the pile when the impact energy of the hammer was 2.5 tm. To determine the load-bearing capacity of the piles, the largest of the average values of the residual failure (refusal) of the pile, consisting of three and five blows, was obtained during re-driving after the "rest" of the piles [3][4][5][6]. The driven piles were of different lengths from 3 to 4.1 meters, depending on bearing capacity, according to the results of dynamic as well as static studies.…”

Section: Dynamic Load Test By Gostmentioning

confidence: 99%

“…This article discusses the experience of designing the foundations of high-rise buildings, taking into account the specified features of the types of foundations. The issues of testing heavily loaded piles and geotechnical monitoring, which are important elements in the design of high-rise buildings, are discussed in detail in previous publications [1][2][3]. Features of high-rise buildings impose increased requirements on the results of EGE (engineering and geotechnical elements) and must solve the following main tasks during their implementation: study of the geological structure of a mass of soils of large volumes (up to 60m in depth and at least 2 more widths of the foundation outside its contour); a reliable assessment of the hydrogeological and hydrochemical conditions, both in the compressible soil massif and in the pit zone and adjacent territory, with the establishment of their corrosive aggressiveness, in time; determination of deformation and strength properties of dispersed and rocky soils at large ranges of stress changes; instrumental observation and monitoring of deformations of the soil massif of the foundation base and the adjacent territory under static impacts [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Features of Testing Piles for High-Rise Buildings in Difficult Soil Conditions in Astana

Mussakhanova

2023

GEOMATE

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The project consists of a high-rise building supported on boring and driven piles. An assessment was made of the current practice in the foundation design of high-rise buildings in Astana, Kazakhstan, to explore areas for improvement. Pile testing is usually undertaken to provide relevant information on one or more of the following issues: the ultimate load capacity of a single pile, the loadsettlement behavior of a pile, the acceptability of the performance of a pile, and the structural integrity of a pile. A three-stage process of foundation design and verification will be described, and the importance of proper ground characterization and assessment of geotechnical parameters will be emphasized. According to the test results, the bearing capacity of driven and bored piles was determined, and a comparative analysis was carried out according to the results of tests for cone penetration (CPT). The analysis of the obtained results showed that the dynamic DLT method (according to GOST) compared with static SLT (according to GOST) and cone-penetrating tests (CPT, according to GOST) showed a low bearing capacity of about 30-40 percent. According to comparative analyzes, the static testing method of piles was determined to differ from the CPT by about 15 percent. These investigations are important for the understanding of soil-structure interaction, especially of boring and driven piles in construction site Astana.

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Evaluation of the Structural Health Monitoring Results of the Applied Fiber Optics in the Pile-Raft Foundations of a High-Rise Building

et al. 2022

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Fiber optics are increasingly being used in structural health monitoring applications. In addition to the well-known advantages, they most reliably transmit the stress–strain condition of the structure in the long term. This article presents the results of structural health monitoring on the embedding of fiber optics in the upper layer of the raft over the entire area of a high-rise building in Astana city (Kazakhstan), including the 75-storey 320 m block R. Temperature and strain data were collected constantly via a distributed fiber optic strain sensing system (DFOSS). The analysis of strains in fiber optic chainage indicated that the compression strains were observed over the entire area of the building, with values from −20 to −40 µε and with progression of the compression loaded up to −80 µε along the core wall closer to the eastern facade of the building. Tension strains were concentrated along the extreme axes of the building, with a predominance in the southern part of the R block, as well as in the immediate vicinity of the columns, in a range of −20 to −40 µε, with separate spots from −40 to −60 µε. Individual patches of tension strains near the columns have been explained by the increased deflection of the raft under the application of a concentrated load (columns). Fiber optic monitoring results at the time of testing did not exceed the permitted values for high-rise building operation; however, they characterized the general picture of the strain in the raft plane and made it possible to determine the initiation of cracks in concrete at an early stage.

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Numerical analysis and geomonitoring of behaviour of foundation of Abu-Dhabi Plaza in Nur-Sultan

Cited by 3 publications

References 6 publications

Analytical and Finite-Element-Method-Based Analyses of Pile Shaft Capacity Subjected to Rainfall Infiltration

Analytical and Finite-Element-Method-Based Analyses of Pile Shaft Capacity Subjected to Rainfall Infiltration

Features of Testing Piles for High-Rise Buildings in Difficult Soil Conditions in Astana

Evaluation of the Structural Health Monitoring Results of the Applied Fiber Optics in the Pile-Raft Foundations of a High-Rise Building

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