Staged Construction Modeling of Steel Pipes Buried in Controlled Low-Strength Material Using 3D Nonlinear Finite-Element Analysis

Dezfooli, Mojtaba Salehi; Abolmaali, Ali; Park, Yeonho; Razavi, Mohammad Reza; Bellaver, Franciele

doi:10.1061/(asce)gm.1943-5622.0000436

Cited by 12 publications

(9 citation statements)

References 11 publications

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“…Subsequently, additional layers were sequentially added, each accompanied by its own specific weight and compaction process. Compaction application was adopted from the literature [10,21]. Thereafter, internal pressure and live load were subsequentially applied to the system.…”

Section: Soil Compaction Applicationmentioning

confidence: 99%

Finite Element Modeling Aspects of Buried Large Diameter Steel Pipe–Butterfly Valve Interaction

Daradkeh,

Jalali

2023

Modelling

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Buried flexible pipes are allowed to deflect up to 2–5% of the pipe diameter, which can become problematic for the connected direct-bury, large-diameter butterfly valves. The complex behavior of the pipe–valve–soil system makes it difficult to predict the deflection of the pipe/valve system. In the absence of field/experimental studies, the application of finite element analysis (FEA) seems necessary to predict deflection and stresses and to avoid potential downtime associated with disruption of service. This paper described the FEA of a large-diameter pipe–valve system, with different backfills under gravity, overburden, and internal pressure loads. The effects of modeling different components of the system (e.g., flanges, bearing housing, gate disc, etc.) were described and investigated. The goal of this study was to provide insight into the design and installation of direct-bury pipe–valve systems and evaluate current installation methods in the absence of guidelines. In addition, the level of modeling details required for FEA to yield accurate results was discussed.

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Section: Soil Compaction Applicationmentioning

confidence: 99%

Finite Element Modeling Aspects of Buried Large Diameter Steel Pipe–Butterfly Valve Interaction

Daradkeh,

Jalali

2023

Modelling

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“…The lower layers affect the horizontal deflection, reducing the diameter; the upper layers reverse the result, causing the pipe to deflect horizontally toward the walls of the trench. Thus, using a procedure that considers the construction process in stages, proposed by Dezfooli et al [10] and described in Section 2.3, results are obtained that better approximate reality. During the construction process of installing pipes in trenches, the compaction of t soil in layers is contemplated, which progressively affects the deflection of the pipe.…”

Section: Proposed Finite Element Modelmentioning

confidence: 99%

“…For example, in the geotechnical and pipeline specialties it has been possible for finite element models to adequately simulate the values of experimental tests. Different publications [9][10][11][12][13][14] analyse buried pipes under different installation conditions and materials and use the FEM to simulate the values of experimental studies.…”

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confidence: 99%

Soil–Structure Interaction Analysis Using the Finite Element Method in Thin-Walled Steel Pipes Buried under Haul Roads

Vilca,

Gómez-Amador,

Jiménez de Cisneros Fonfría

2023

Applied Sciences

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This paper addresses the challenges associated with steel pipes used for transporting liquid fluids within buried sections of mining facilities, specifically in areas with heavy mining vehicles. While existing design standards, such as AW-WA M11, and manufacturer recommendations largely consider loads from vehicles like the AASHTO HS20 or Cooper E-80, both weighing below 35 tons, these guidelines inadequately represent the actual loads experienced on certain mining roads, notably those accommodating heavy vehicles, like haul roads. The research presented here focuses on the interaction between soil and buried steel pipes under the substantial loads exerted by mining vehicles with a maximum gross load of up to 612 tons, inclusive of hauled material weight. Utilizing a parametric study with the finite element method, the paper identifies critical variables influencing efforts and deflections calculations in these facilities. The analysis of 108 models, varying parameters related to trench pipe installation conditions, offers insights that empower designers to refine soil trench parameters in mining facilities, mitigating pipe failures and optimizing installation costs. Ultimately, the key influential variables affecting pipe deflection and stress are identified as the trench backfill height and the elasticity modulus of the trench lateral fill.

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“…Staged construction modeling of steel pipes buried in CLSM was investigated by Dezfooli et al [7]. The results of field tests were compared with 3D nonlinear numerical model.…”

Section: Previous Investigations On Behavior Of Buried Pipelinesmentioning

confidence: 99%

Numerical investigation on rigid and flexible pipelines embedded in granular and self-compacting materials

Abdel‐Rahman

Gerlach

Achmus

2020

Innov. Infrastruct. Solut.

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Self-compacting filling material or controlled low-strength material (CLSM) is a cementitious material which is liquid during filling, and it is used primarily as backfill, e.g., in trenches. Several products are currently used as CLSM such as flowable fill, controlled density fill, flowable mortar and low-strength plastic soil–cement. The low-strength requirement is necessary to allow for future excavation of CLSM. A two-dimensional numerical model was developed using the finite element system ABAQUS. In this model, the material behavior of granular soil and CLSM is described using an elasto-plastic constitutive model with Mohr–Coulomb failure criterion. Rigid and flexible pipes were modeled once embedded in sandy soil and once embedded in self-compacting material. The numerical model allows the modeling of the effect of hardening process on the overall behavior of the pipe–soil system. The main objective of this study is to investigate the behavior of rigid and flexible pipelines embedded in CLSM as a filling material numerically and to show advantages and disadvantages in comparison with the presently widely used filling materials like sand.

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Staged Construction Modeling of Steel Pipes Buried in Controlled Low-Strength Material Using 3D Nonlinear Finite-Element Analysis

Cited by 12 publications

References 11 publications

Finite Element Modeling Aspects of Buried Large Diameter Steel Pipe–Butterfly Valve Interaction

Finite Element Modeling Aspects of Buried Large Diameter Steel Pipe–Butterfly Valve Interaction

Soil–Structure Interaction Analysis Using the Finite Element Method in Thin-Walled Steel Pipes Buried under Haul Roads

Numerical investigation on rigid and flexible pipelines embedded in granular and self-compacting materials

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