On the Use and Interpretation of In Situ Load Tests in Weak Rock Masses

Asem, Pouyan; Gardoni, Paolo

doi:10.1007/s00603-021-02485-0

Cited by 3 publications

(1 citation statement)

References 72 publications

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“…Nowadays, rock-socketed piles are being increasingly used in foundation engineering to support heavily loaded buildings and structures, such as high-rise buildings, long-span bridges and wind turbines [3]. Due to the inevitable compressibility of reinforced concrete piles and the magnitude difference in the displacement required to reach the ultimate bearing state, the shaft and base resistances cannot mobilize simultaneously [4][5][6][7], shaft resistance generally dominates at the service loads of rock-socketed piles and therefore is always a topic of large research interests [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Field Measurement and Theoretical Analysis of Sidewall Roughness on Shaft Resistance of Rock-Socketed Piles

Liu,

Li,

Dai

et al. 2023

JMSE

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Sidewall roughness is a key factor influencing the shaft resistance of rock-socketed piles. Owing to the difficulties in onsite measuring and the inconsistency in quantitatively characterizing the roughness degree of sidewalls, existing approaches for estimating the shaft resistance of rock-socketed piles often cannot take this factor into account. Based on the measured surface curves of the 68 sockets in No. 6# and 7# group piles of the Chishi Bridge on the Ru-Chen Expressway in China, sidewall roughness is described by introducing the roughness factor (RF) based on the Horvath and Monash models, respectively, while a statistical analysis of the sidewall roughness in rock-socketed sections is also conducted. In addition, an analytical solution to the shaft resistance of rock-socketed piles with consideration of sidewall roughness and the relative settlement of the pile–rocks interface (∆s), is proposed and further compared with the field load tests. The results showed that: the RF obtained by the Horvath model is bigger than that obtained by the Monash model; the larger RF is, the bigger the mobilized shaft resistance; the analytical solution generally overestimates the mobilized shaft resistance of rock-socketed piles under the same ∆s, and the deviation is less than 15% if ∆s is larger than 3.00 mm. The Horvath model is recommended to quantitatively characterize the roughness degree of sidewalls for its good operability in practice.

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Section: Introductionmentioning

confidence: 99%

Field Measurement and Theoretical Analysis of Sidewall Roughness on Shaft Resistance of Rock-Socketed Piles

Liu,

Li,

Dai

et al. 2023

JMSE

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Evaluating the deformation modulus at representative elementary volume using electrical resistivity tomography

Akbariforouz,

Zhao,

Stocchino

et al. 2024

International Journal of Rock Mechanics and Mining Sciences

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Review on Constitutive Model for Simulation of Weak Rock Mass

Azadi,

Momayez

2024

Geotechnics

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Understanding the behavior of weak rock masses is important for predicting the stability of structures under different loading conditions. Traditional models such as the generalized Hoek–Brown and Coulomb weak plane are widely used; however, they often fail to capture the nonlinear and irreversible behavior of weak rock masses. This study offers a comprehensive overview of a critical analysis of constitutive models’ strengths and limitations for simulating weak rock masses. By comparing traditional and advanced novel approaches such as the strength degradation of rock (SDR) masses and continuous damage mechanics (CDM), this investigation shows that the new advanced methods significantly enhance the quality and accuracy of simulations. Moreover, SDR models address the limitations of classical plasticity models by incorporating nonlinear stress paths and irreversible stress changes, while CDM offers detailed insights into microstructural defect progression. These advancements allow for more accurate and practical predictions of long-term stability in geomechanical engineering tailored to specific requirements of each project.

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On the Use and Interpretation of In Situ Load Tests in Weak Rock Masses

Cited by 3 publications

References 72 publications

Field Measurement and Theoretical Analysis of Sidewall Roughness on Shaft Resistance of Rock-Socketed Piles

Field Measurement and Theoretical Analysis of Sidewall Roughness on Shaft Resistance of Rock-Socketed Piles

Evaluating the deformation modulus at representative elementary volume using electrical resistivity tomography

Review on Constitutive Model for Simulation of Weak Rock Mass

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