Negative Skin Friction Distribution on a Single Pile - Numerical Analysis

Awwad, Talal; Kodsi, Salma Al; Shashkin, A. G.

doi:10.1007/978-3-030-01902-0_4

Cited by 5 publications

(3 citation statements)

References 5 publications

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“…The problem solution of a finding of stressstrain state of the reinforced concrete driving pile in a heterogeneous base was done in several publications [9][10][11][12]. Figure 6 shows the design scheme with an indication of variation limits of materials types.…”

Section: Nonlinear Theory Creation and Calculation Computer Programmentioning

confidence: 99%

Development of the Computer Program of Calculation of Concrete Bored Piles in Soil Ground of Astana City

Awwad¹

2019

GEOMATE

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The current calculating theories of massive constructions are based on the simplified models without consideration of factors settlement as nonhomogeneous environments interaction, the interacting environments nonlinearity or considering them separately and conditionally. Therefore, equivalent numerical model designing of bored piles interaction with the soil mass and designing of a nonlinear technique of numerical calculation of similar systems on its basis is a modern and relevant task, which is an effective tool for a number of relevant geotechnical tasks solutions. The calculation of reinforced concrete bored pile with the real diagrams of a pile material deformation and surrounding rock massif has been presented in the article. The computer program allows receiving the strain-stress state of a pile and the surrounded massif as one heterogeneous body. New calculation approaches of the reinforced concrete bored pile can be used in the standards modernization when transferring from the regulatory framework of Kazakhstan to Euro code according to the reform concept.

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Section: Nonlinear Theory Creation and Calculation Computer Programmentioning

confidence: 99%

Development of the Computer Program of Calculation of Concrete Bored Piles in Soil Ground of Astana City

Awwad¹

2019

GEOMATE

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“…Ye Guanbao et al [4] established a single-pile finite element model for field tests, and studied the negative skin friction distribution features of friction-type piles in large-area fill sites. Talal Awwad [5] established a numerical model of a single pile to study the distribution features of negative skin friction on the pile and the change of neutral plane position under different loads. For example, Kong et al [6] used FLAC 3D to establish a numerical model considering both soil surface loading and soil consolidation, and studied the formation and influencing factors of negative skin friction.…”

Section: Introductionmentioning

confidence: 99%

Finite Element Analysis of Negative Skin Friction of Collapsible Loess Foundation Group Piles

Tian,

Zhang

2023

Advances in Frontier Research on Engineering Structures

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Based on the parameter changes of strong collapsible loess in Xi’an before and after humidification, a finite element model of pile group was established, and the pile group effect and negative skin friction characteristics of pile foundation after loess collapse caused by the rise of groundwater table were analyzed. The results show that the effect of pile diameter change on negative skin friction is not obvious, and with the increase of pile diameter, negative skin friction has a weak tendency to decrease. The pile group effection has a significant weakening effect on the negative skin friction, and the pile group effect weakens as the pile spacing increases, and when the pile spacing exceeds six times the pile diameter, this effect is minimal. When the pile spacing is six times the diameter, the total negative skin friction of the edge pile in the group pile is very close to that of the single pile. The axial force have a strong correlation with the friction resistance of the pile side, from the top of the pile downward, the friction resistance changes from negative to positive at the neutral point, while the axial force of the pile body has a vertex at the neutral point. In addition, due to the weight of the cushion cap, not only the neutral surface depth ratio is reduced, but also the axial force of the pile group increases.

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“…For example, Italian and American companies, which work in the western part of Kazakhstan, have faced some difficulties of non-compliance between Kazakhstan Codes and international ones. Kazakhstan engineers also have some problems in modern projects designing where advanced technologies are generally used [3][4].…”

Section: Introductionmentioning

confidence: 99%

Geotechnical Specification of American and Kazakhstan Standards in Pile Testing

Zhussupbekov¹

2019

GEOMATE

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Pile foundations become more essential during the construction of mega projects of the new capital of Kazakhstan-Astana. Many advanced pile technologies are appearing today. Unfortunately, Kazakhstan Standards have not a recommendation for modern pile design, testing and quality control methods. This paper presents methodic of the testing pile by ASTM D8169 (USA) standard and the State Standard 5686-94 (Kazakhstan). The methodic of testing piles by these standards have some differences. Discussion of using control equipment, technological features of the aforementioned methodic shall be important for the understanding of different points. The paper includes the results of piles of static tests using ASTM standards. The recommendations for the future modernization of Kazakhstan Standards have been given. It was concluded that the tests conducted according to the requirements of American standards which have made them more accurate and reliable.

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Negative Skin Friction Distribution on a Single Pile - Numerical Analysis

Cited by 5 publications

References 5 publications

Development of the Computer Program of Calculation of Concrete Bored Piles in Soil Ground of Astana City

Development of the Computer Program of Calculation of Concrete Bored Piles in Soil Ground of Astana City

Finite Element Analysis of Negative Skin Friction of Collapsible Loess Foundation Group Piles

Geotechnical Specification of American and Kazakhstan Standards in Pile Testing

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