A case study of the sizing and optimisation of an energy pile foundation (Rosborg, Denmark)

Alberdi-Pagola, Maria; Poulsen, Søren Erbs; Jensen, Rasmus Lund; Madsen, Søren

doi:10.1016/j.renene.2018.07.100

Cited by 22 publications

(8 citation statements)

References 22 publications

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“…Energy piles gained growing interest in the last few years. Alberdi-Pagola et al [6] applied a validated approach for sizing and optimization of an energy pile foundation. Semi-empirical multiple pile g-functions yield reliable estimates of fluid temperatures for relatively small, irregular pile arrays.…”

Section: Optimization Methods For Foundationsmentioning

confidence: 99%

Recent Tendencies in the Use of Optimization Techniques in Geotechnics: A Review

Boumezerane

2022

Geotechnics

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The use of optimization methods in geotechnics dates back to the 1950s. They were used in slope stability analysis (Bishop) and evolved to a wide range of applications in ground engineering. We present here a non-exhaustive review of recent publications that relate to the use of different optimization techniques in geotechnical engineering. Metaheuristic methods are present in almost all the problems in geotechnics that deal with optimization. In a number of cases, they are used as single techniques, in others in combination with other approaches, and in a number of situations as hybrids. Different results are discussed showing the advantages and issues of the techniques used. Computational time is one of the issues, as well as the assumptions those methods are based on. The article can be read as an update regarding the recent tendencies in the use of optimization techniques in geotechnics.

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Section: Optimization Methods For Foundationsmentioning

confidence: 99%

Recent Tendencies in the Use of Optimization Techniques in Geotechnics: A Review

Boumezerane

2022

Geotechnics

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“…Meanwhile, thanks to the superimposition principle [21], analytic solutions are far more flexible to handle arbitrary borehole locations. A framework can even be built to select which piles to equip in a field [8].…”

Section: Classical Interpretationmentioning

confidence: 99%

“…Therefore many approaches to the analysis of BHE, which assume the presence of a very long and thin heat source, may not be applicable to PHE. Consequently, more appropriate methods for thermal modeling such as fully discretized models (e.g., finite element analysis) to investigate the pipe arrangements and thermal performance [6,7] or semi-analytical models for thermal dynamic simulation of the whole energy system with hourly time steps [8] are often applied.…”

Section: Introductionmentioning

confidence: 99%

A New Approach for Characterizing Pile Heat Exchangers Using Thermal Response Tests

Maragna

Loveridge

2021

Energies

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Pile heat exchangers offer a cost effective route to implementation of ground-source heat pump systems for many large commercial buildings compared with traditional boreholes. Such projects typically use thermal response tests to determine the key input parameters for system design, namely soil thermal conductivity and heat exchanger thermal resistance. However, this brings challenges for pile heat exchanger based systems, where in situ thermal response tests are known to be less reliable due to the large thermal capacity of the pile. This paper presents a new “black box” resistance capacitive model for applications to pile thermal response tests. The approach is tested against case study data and shown to perform well. Additional test duration savings are shown to be possible if a novel combination of borehole and pile thermal response tests is applied together to determine design parameters.

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“…Kravanja et al [19] discussed a comparative study of an optimal design for composite steel-concrete floor structures based on the multiparametric mixed-integer nonlinear programming (MINLP) approach. The multiparametric optimization approach has also been applied in the field of geotechnical engineering, e.g., in the design of piled embankments with basal reinforcement [20,21], conventional [22,23] and geothermal energy piles [24,25], reinforced pad and strip foundations [26,27] and geosynthetic-reinforced soil bridge abutments [28]. Several studies have evaluated the sustainability of the most common earth retaining walls such as gabion walls, crib walls, masonry walls, mechanically stabilized earth walls and reinforced concrete walls.…”

Section: Introductionmentioning

confidence: 99%

Multiparametric Analysis of a Gravity Retaining Wall

2021

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The design of a gravity retaining wall should be simple to construct, quick to build and the best economic solution to a problem. This can be achieved by using advanced optimization methods. Since geotechnical engineers are not always able to determine the exact soil properties and other project data, an optimal design of a gravity retaining wall should also be determined for a wide range of input parameters. Therefore, a multiparametric analysis of an optimal designed gravity retaining wall was carried out. Optimum designs of gravity retaining walls were obtained for 567 combinations of different design parameters. Diagrams were developed to help engineers determine the optimum section of the wall, based on construction costs. An exhaustive search was carried out within the available parameters (project data). The parameters were ranked according to which had the most influence on the optimum cost of the gravity retaining wall and the utilization of multiple constraints. The most important parameter for the optimal cost of a gravity retaining wall is the height of the retained ground, followed by the shear angle of the soil, the soil–wall interaction coefficient, the slope angle and the variable surcharge load. The shear angle of the soil is most relevant to the bearing capacity and eccentricity condition, while the soil–wall interaction coefficient is most relevant to the sliding condition. Since European countries apply different load, material and resistance safety factors, the optimization model was developed in a general form, where different design approaches and unit prices could be applied. The case study provides an improved optimization model for selecting the optimal design of gravity walls, for engineers.

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A case study of the sizing and optimisation of an energy pile foundation (Rosborg, Denmark)

Cited by 22 publications

References 22 publications

Recent Tendencies in the Use of Optimization Techniques in Geotechnics: A Review

Recent Tendencies in the Use of Optimization Techniques in Geotechnics: A Review

A New Approach for Characterizing Pile Heat Exchangers Using Thermal Response Tests

Multiparametric Analysis of a Gravity Retaining Wall

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