Nonlinear fictitious-soil pile model for pile high-strain dynamic analysis

Tu, Yuan; Naggar, M. Hesham El; Wang, Kuihua

doi:10.1016/j.soildyn.2022.107464

Cited by 3 publications

(2 citation statements)

References 28 publications

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“…However, both of these methods are destructive testing techniques with long cycles, high costs, low sampling ratios (1~2%) and poor representativeness of sampling. High-strain dynamic measurement 32 – 34 is to impact the pile top with a heavy hammer, and then analyze and determine the vertical compressive bearing capacity and pile integrity of a single pile based on the wave theory. This method can only provide reference bearing capacity.…”

Section: Introductionmentioning

confidence: 99%

Quality evaluation of ground improvement by deep cement mixing piles via ground-penetrating radar

Li²,

Duan

et al. 2023

Nat Commun

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Deep cement mixing piles are a key technology for treating settlement distress of soft soil subgrade. However, it is very challenging to accurately evaluate the quality of pile construction due to the limitations of pile material, large number of piles and small pile spacing. Here, we propose the idea of transforming defect detection of piles into quality evaluation of ground improvement. Geological models of pile group reinforced subgrade are constructed and their ground-penetrating radar response characteristics are revealed. We have also developed ground-penetrating radar attribute analysis technology and established ground-penetrating radar technical system for evaluating the quality of ground improvement. We further prove that the ground-penetrating radar results integrating single-channel waveform, multi-channel section and attributes can effectively detect the defects and stratum structure after ground improvement. Our research results provide a rapid, efficient and economic technical solution for the quality evaluation of ground improvement in soft soil subgrade reinforcement engineering.

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Section: Introductionmentioning

confidence: 99%

Quality evaluation of ground improvement by deep cement mixing piles via ground-penetrating radar

Li²,

Duan

et al. 2023

Nat Commun

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“…To obtain the data for such testing, it is necessary to move the piles sufficiently to mobilize the available soil resistance, which highlights one of the problems of the response of dynamically driven piles [38] . In recent years, scholars such as Salgado et al [39] , Alwalan et al [40] , and Tu et al [41] have addressed this problem by establishing soil resistance and finite element numerical analysis models to replace the field static load testing.…”

Section: Introductionmentioning

confidence: 99%

Field experimental research on vertical load-bearing properties of rock-socketed cast-in-place piles based on pile stress test

Yan,

Zhang,

Bai

et al. 2023

Preprint

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This paper researched the vertical load-bearing capacity of rock-socketed cast-in-place piles using static load tests, and high- and low-strain dynamic tests, based on a construction project in Indonesia. On this basis, an exponential curve model was used to predict the ultimate load capacity of each test pile. The test piles were divided into 800 mm and 600 mm diameter groups. Under the maximum test load conditions, the end resistance of the 800 mm diameter piles accounted for more than 50% of the load, showing good friction end-bearing pile characteristics. In contrast, the maximum end resistance of the 600 mm diameter piles accounted for less than 35% of the load, showing end-bearing frictional pile characteristics where the vertical bearing capacity of a single pile is predominantly borne by the pile side friction resistance. The piles' load-settlement (Q‑s) curves varied slowly, with a maximum settlement of less than 30 mm. The rebound settlement rate at the top of the pile was significant, while the residual settlement was small. Under the maximum load, the pile side friction resistance reached a maximum in the rock-embedded section at the location of the flattest slope of the axial force curve.

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Dynamic analysis model of open-ended pipe piles that considers soil plug slippage

Naggar²,

Wen

et al. 2023

Computers and Geotechnics

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Nonlinear fictitious-soil pile model for pile high-strain dynamic analysis

Cited by 3 publications

References 28 publications

Quality evaluation of ground improvement by deep cement mixing piles via ground-penetrating radar

Quality evaluation of ground improvement by deep cement mixing piles via ground-penetrating radar

Field experimental research on vertical load-bearing properties of rock-socketed cast-in-place piles based on pile stress test

Dynamic analysis model of open-ended pipe piles that considers soil plug slippage

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