Pipeline burst-related ground stability in blowout condition

Shiau, Jim; Chudal, Bishal; Mahalingasivam, Kiritharan; Keawsawasvong, Suraparb

doi:10.1016/j.trgeo.2021.100587

Cited by 46 publications

(10 citation statements)

References 31 publications

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“…The upper bound (UB) and lower bound (LB) finite element limit analysis (FELA, OptumCE 2019) has been successfully applied to several geotechnical stability problems in recent years (see e.g., Keawsawasvong and Shiau 2021a, b;Shiau et al 2003Shiau et al , 20062021a, b, c;Al-Asadi 2020a, b, c, 2021a, b;Keawsawasvong et al 2022), and it is employed to study the bearing capacity of the closely spaced footing problems using the Hoek-Brown (HB) yield criterion in this paper.…”

Section: Finite Element Limit Analysismentioning

confidence: 99%

Stability Charts for Closely Spaced Strip Footings on Hoek–Brown Rock Mass

et al. 2022

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Footings are constructed closely to each other in mountainous rock areas and the determination of closely spaced bearing capacity footings on rock masses has become an important topic of recent research. The primary aim of this paper is to determine an efficiency factor, just like in the design of a pile group, that can be used to evaluate the bearing capacity of closely spaced footings on Hoek–Brown mass. The advanced finite element limit analysis of upper and lower bound theorems is used to study the stability of two and multiple interfering footings using the Hoek–Brown parameters such as GSI (geological strength index) and mi (Hoek–Brown yield parameter). This study found that the efficiency factor is influenced by three dimensionless parameters including GSI, mi, and S/B. Failure mechanisms of the problems are also investigated, and stability charts and tables produced for practical uses. Overall, these results broadly support the common understanding of the two key parameters GSI and mi in the HB failure criterion. As a result of these investigations, suggestions were identified for future research.

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Section: Finite Element Limit Analysismentioning

confidence: 99%

Stability Charts for Closely Spaced Strip Footings on Hoek–Brown Rock Mass

et al. 2022

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“…Many researchers have studied the problem by performing small-scale laboratory or field tests, as well as by conducting theoretical or numerical analyses on an unreinforced soil medium. These studies have implemented different theoretical or numerical techniques, such as a method of stress characteristics (Graham et al, 1984;Kumar and Ghosh, 2007a); upper bound limit analysis (Kumar and Kouzer, 2008;Kumar, 2008, 2010;Kumar and Ghosh, 2007b;Yang et al, 2017;Biswas and Ghosh, 2018;Keawsawasvong et al, 2021;Yodsomjai et al, 2021); lower bound limit analysis Bhattacharya, 2010, 2013;Shiau et al, 2021;Keawsawasvong and Boonchai Ukritchon, 2022); the finite difference method (Ghazavi and Lavasan, 2008;Ghosh and Sharma, 2010;Mabrouki et al, 2010;Lavasan and Ghazavi, 2012b;Javid et al, 2015;Lavasan et al, 2017); the finite element method (Lee et al, 2008;Lee and Eun, 2009;Kumar and Bhoi, 2010;Nainegali et al, 2013Nainegali et al, , 2018Nainegali et al, , 2019Noorzad and Manavirad, 2014;Zidan and Mohamed, 2019;Sekhar et al, 2020;Shokoohi et al, 2019;Fuentes et al, 2019;Ekbote and Nainegali., 2019a, b;Sekhar et al, 2020;Alzabeebee, 2020Alzabeebee, , 2022Ekbote et al, 2022); the analytical method Saran, 2003b, 2004;Ghos...…”

Section: Introductionmentioning

confidence: 99%

Study on Closely Spaced Asymmetric Footings Embedded in a Reinforced Soil Medium

Ekbote,

Nainegali

2023

Ing. Inv.

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In practice, footings are rarely laid on the surface or at ground level; usually, they are embedded in the soil medium. Most studies focus on surface footings. This research examines the behavior of two interfering asymmetric footings while considering their widths to be dissimilar and the effect of embedment depth to enhance the ultimate bearing capacity and limit the settlement within the working range. This was evaluated through the finite element method of the ABAQUS software. The soil was assumed to have a Mohr-Coulomb failure, and the asymmetry corresponded to the footing widths. The results are presented in terms of interference factors, i.e., the ultimate bearing capacity (UBC) and the settlement, which are defined as the UBC/settlement ratio of the left/right footing in the presence of the other one placed on reinforced soil. This, in comparison with an identical isolated footing on unreinforced soil. Interference is more significant in small footings than in large ones. Due to behavioral variations, the bearing capacity and settlement are different. This effect increases with an increase in the width of large footings, and the interference factors decrease with an increase in the embedment depth of the footings. When the right footing width is twice that of the other and considering one layer of reinforcement and soil friction angles of 30º and 40º, the percent increments in the bearing capacity of interfering left footings, for a spacing of 0,5 times the left footing width, are 104 and 148%, respectively.

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“…Research on the failure of buried pipelines has increased significantly in recent years because such failure results in social issues including economic loss, 1 explosions, 2,3 environmental pollution, 4 and settlement 5,6 due to the leakage of internal fluids. An effective countermeasure against these issues is identifying the causes of failure and monitoring their signs.…”

Section: Introductionmentioning

confidence: 99%

Source location and anomaly detection for damage identification of buried pipelines using kurtosis-based transfer function

Lee,

Park,

Yoon

2023

Structural Health Monitoring

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The failure of buried pipelines can lead to serious consequences such as explosions, environmental pollution, settlement, as well as economic loss. To prevent these outcomes, it is crucial to identify the causes of failure and monitor their signs. One of the main causes of failure is unexpected third-party interference (TPI), which is particularly challenging to detect. Regarding to this issue, this study proposes a new algorithm for monitoring impact damage, which can be used for prompt response and damage prevention. The algorithm is integrated into the system using two approaches. The first approach focuses on detecting the location of the damage (referred to as source location). A kurtosis-based transfer function was newly proposed to selecting the optimal frequency band for time-difference-of-arrival based source location, resulting in accurate pinpointing of damage, even in a noisy environment. The second approach is used to determine whether impact damage has actually occurred by observing newly suggested features in both the time and frequency domains (referred to as anomaly detection). These features evaluate the presence of damage and the similarity between signals. As a result, it was evaluated that the field applicability was higher than that of conventional methods, and the superiority of the proposed method was also verified through field experiments. The method proposed in this study is expected to enable immediate response when the integrity of the buried pipelines is on the line of failure due to TPI.

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Pipeline burst-related ground stability in blowout condition

Cited by 46 publications

References 31 publications

Stability Charts for Closely Spaced Strip Footings on Hoek–Brown Rock Mass

Stability Charts for Closely Spaced Strip Footings on Hoek–Brown Rock Mass

Study on Closely Spaced Asymmetric Footings Embedded in a Reinforced Soil Medium

Source location and anomaly detection for damage identification of buried pipelines using kurtosis-based transfer function

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