Comparison of Mohr-Coulomb and Hardening Soil Models  Numerical Estimation of Ground Surface Settlement Caused by Tunneling

Çelik, Samet

doi:10.21597/jist.2017.202

Cited by 13 publications

(6 citation statements)

References 11 publications

(23 reference statements)

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“…Since it is essential to use an appropriate soil model for the prediction of soil behaviors, the numerical analyses were accomplished using the Hardening Soil model which can represent the behavior of different soils, both soft soil and stiff soils [42]. The model was established in the frame of the theory of elasticity, and the material behavior is non-linear before failure, but after failure, it is considered based on Mohr-Coulomb strength parameters [43,44]. Following the definition of soil properties, the properties of the pile element were introduced to the software, and the relevant structural element was assigned to the relevant region.…”

Section: Finite Element Modelmentioning

confidence: 99%

Physical and Finite Element Models for Determining the Capacity and Failure Mechanism of Helical Piles Placed in Weak Soil

Emirler

2024

Applied Sciences

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The foundations of particular engineering structures, including marine and jetty structures, mooring systems for submerged platforms or those on the ocean surface, and transmission towers, are subjected to various external loads including compression, uplift, and lateral loads. In such cases, to improve the soil resistance below foundations, pile foundations such as helical piles, anchored piles, and batter piles are commonly preferred, depending on the in situ conditions. Helical piles, increasingly used as an alternative foundation to conventional piles, are placed in the soil body by rotating with torque. This paper deals with the contribution of a helical pile in improving loose sandy soil, and the main purpose is to study the effect of the helix-buried depth on the load-bearing capacity and failure mechanism. The investigated variables include the distance between helixes, the number of helixes, and the diameter of the upper helix. Physical model tests were conducted, and two- and three-dimensional numerical analyses were performed by using the finite element method with an advanced soil model to illustrate the failure mechanisms of helical piles. The aim was to reveal the efficiency of the finite element method in modelling helical piles placed in weak sandy soil. A simplified linear geometry for helixes was established in a two-dimensional finite element model whereas a real geometry for helixes, which was a more realistic approach, was created in a three-dimensional finite element model. The results show that the three-dimensional model indicates better agreement with the physical model compared to the two-dimensional model, and all investigated variables highly affect the load-bearing capacity of helical piles.

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Section: Finite Element Modelmentioning

confidence: 99%

Physical and Finite Element Models for Determining the Capacity and Failure Mechanism of Helical Piles Placed in Weak Soil

Emirler

2024

Applied Sciences

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“…The 2D Plaxis model was used to simulate the T investigation of an in-depth tunnel excavation by the MC model. Following this examination, the researchers discovered that as the tunnel's depth climbs, the colonies on the soil's surface shrink and approach their true values [24]. On the other hand, the excavation has increased again because of the unloading behaviour (softer or weaker) and the stiffness parameter that minimises deformation.…”

Section: Numerical Modellingmentioning

confidence: 99%

Mechanical behaviour of sandy soils embankments treated with cement and reinforced with discrete elements (fibres)

Bouteben

Boudaoud

2022

Frattura Ed Integrità Strutturale

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It is well known that the reinforcement of the Soil is considered as a solution to its stability problems. This technique ameliorates the mechanical and physical comportment of the soil. Based on this, this research paper aims at investigating the behaviour of a specific type of dried-cemented-sandy soil reinforced with discrete elements such as polypropylene fiber basically through experimental tests. The latter are a series of consolidated drained triaxial tests which were carried out on samples of sand that are prepared with 0, 3 and 6% of cement, reinforced with 1% of polypropylene fiber (12, 18 mm) randomly distributed. Furthermore, those contents are measured by the volume of dry sand. In addition to these tests, a parametric study has also been conducted on a road embankment using a finite element program such as Plaxis 2D in order to observe the variation of different parameters like safety factor and the displacements (Ut, Ux, Uy). The test results showed that the addition of cement and polypropylene fiber of different accommodations increased both cohesion and friction angle of sands while the numerical results indicated that the presence of these additions improved the safety factor and decreased significantly the displacements.

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“…Çelik [25] conducted a study on tunneling using two models, namely-Mohr-Coulomb model and Hardening soil model. Close to accurate predictions of ground movement in case of underground excavations in urban areas bears utmost importance.…”

Section: Application In Underground Cavern and Tunnelmentioning

confidence: 99%

Role of Cloud Computing in Geotechnical Engineering

Behera

Das

2020

Smart Innovation, Systems and Technologies

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Geotechnical engineers, nowadays, are able to examine many problems in much greater depth with the help of advanced hardware and software. Again, the engineers have started to depend less on sophisticated software and hardware with the availability of cloud computing services. Here, only the cloud computing system interface software needs to be run simply like a web browser. In view of the inherent risk and variability associated with geotechnical engineering, the geotechnical modelling tools usually resort to statistical and numerical techniques to take care of uncertainties in the key problem parameters. With the advent of cloud computing, geotechnical engineering needs computer technology not only for analysis and mathematical modelling, but also for recording, storing, retrieving, processing, visualizing and displaying of important geotechnical data much efficiently. The present paper broadly reviews the role of cloud computing as well as system identification and parameter identification integrated with cloud computing in geotechnical engineering.

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Comparison of Mohr-Coulomb and Hardening Soil Models Numerical Estimation of Ground Surface Settlement Caused by Tunneling

Cited by 13 publications

References 11 publications

Physical and Finite Element Models for Determining the Capacity and Failure Mechanism of Helical Piles Placed in Weak Soil

Physical and Finite Element Models for Determining the Capacity and Failure Mechanism of Helical Piles Placed in Weak Soil

Mechanical behaviour of sandy soils embankments treated with cement and reinforced with discrete elements (fibres)

Role of Cloud Computing in Geotechnical Engineering

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