Semi-analytical solutions for geosynthetic-reinforced and pile-supported embankment

Zhang, Ling; Zhao, Minghua; Hu, Yuxia; Zhao, Heng; Chen, Bingchu

doi:10.1016/j.compgeo.2012.04.001

Cited by 46 publications

(19 citation statements)

References 12 publications

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“…The rigid arch models include Scandinavian models such as Carlsson (1987), Rogbeck et al (1998, modified by Van Eekelen et al, 2003, Svanø et al (2000), the enhanced arch model described in, for example, Collin (2004), the design method of the Public Work Research Center in Japan (2000, discussed in Eskiş ar et al, 2012. The models that consider the behaviour of the separate mechanical elements and match their boundaries are described in, for example, Filz et al (2012), Deb (2010), Deb and Mohapatra (2013) and Zhang et al (2012). The present paper focuses on the last family of arching models: limit equilibrium models.…”

Section: Introductionmentioning

confidence: 99%

Validation of analytical models for the design of basal reinforced piled embankments

Eekelen

Bezuijen

Tol

2015

Geotextiles and Geomembranes

111

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a b s t r a c t Van Eekelen et al. (2012a,b, 2013 have introduced an analytical model for the design of the geosynthetic reinforcement (GR) in a piled embankment. This paper further validates this model with measurements from seven full-scale tests and four series of scaled model experiments. Most of these measurements have been reported earlier in the literature.The new model describes arching with the "Concentric Arching model" (CA model). This model is an extension of the single arch model of Hewlett and Randolph (1988) and the multi-scale model of Zaeske (2001), which is also described in Kempfert et al. (2004). For load-deflection behaviour, Van Eekelen et al. (2012a,b, 2013) proposed the use of a net load distribution that is inverse triangular instead of uniform or triangular. These authors also proposed the inclusion of all the subsoil support beneath the GR in the calculations.On the basis of comparisons between the measurements and calculations, it is concluded that the CA model matches the measurements better than the models of Zaeske or Hewlett and Randolph.Where there is no subsoil support, or almost no subsoil support, the inverse triangular load distribution on the GR strips between adjacent piles gives the best match with the measurements. Cases with subsoil support generally lead to less GR strain. In the cases with significant subsoil support, the load distribution is approximately uniform. In the cases with limited subsoil support, it should be determined which load distribution gives the minimum GR strain to find the best match with the measurements.

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Section: Introductionmentioning

confidence: 99%

Validation of analytical models for the design of basal reinforced piled embankments

Eekelen

Bezuijen

Tol

2015

Geotextiles and Geomembranes

111

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“…Most of the problems mentioned above arise from a soft subgrade. A variety of ground improvement techniques have been adopted to address soft subgrade‐related issues, among others: grouting [eg,], soil mixing [eg,], micropile [eg,], soil nail [eg,], stone column [eg,], and rigid inclusions . The last one (also known as column‐supported embankment) are gaining more attention every time in geotechnical engineering in general [eg,], and in the railroad industry in particular [eg,].…”

Section: Introductionmentioning

confidence: 99%

Numerical study on the effect of rigid inclusions on existing railroads

Wang

Sánchez

Briaud

2019

Num Anal Meth Geomechanics

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Summary Railroad track problems have been exacerbated by the continuous increase in freight loads and train traffic. The need to implement soil improvement technique in a relatively short window‐time (ie, to minimize train‐traffic disruption) is a key aspect to be considered when adopting a convenient remedial solution to control settlements in railroads constructed on problematic subgrades. Rigid inclusions are selected in this paper because they are reliable solutions relatively easy to implement. Furthermore, they can be used in different ground conditions and are suitable for short construction times (eg, do not require a curing time, as in grouting methods). Typical (analytical) methods for the design of rigid inclusions are adopted in this paper to define an optimal distribution of piles for the case of existing railroads. The selected layout is then analyzed in detail by means of a 3‐D dynamic finite element simulator using both, elastoplastic and elastic models. The performance of rigid inclusions is studied considering different operational scenarios, with dynamic and static loads, as well as involving subgrades with different plasticity index values. It is found that the predictions from the analytical design methods for rigid inclusion tend to be unconservative when compared against the finite element results. As for the numerical solutions, the most unfavorable stress condition is associated with the dynamic elastoplastic finite element solution. It is estimated that the rigid inclusions will contribute to a reduction in the ground settlements of around 15% to 20%, depending on the subgrade plasticity index.

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“…Actually, many researchers have carried out different kinds of model and field tests (Blanc et al 2014;Chen et al 2016;Erfen et al 2017;Fagundes et al 2017;Zheng et al 2011) and different analytical methods (Chen et al 2008;Hewlett & Randolph 1988;Liu et al 2017;Zhang et al 2012) to study the pile-supported embankments. More recently, investigators have mainly focused on studying the effect of pile-supported embankments using finite element method (FEM) (Ariyarathne & Liyanapathirana 2015;Huang & Han 2009;Stewart & Filz 2014;Yapage et al 2014;Zhuang et al 2012).…”

Section: Kata Kunci: Asas Komposit Kerak Tiruan; Benteng Disokong Cermentioning

confidence: 99%

Comparative Analysis of Load Responses and Deformation for Crust Composite Foundation and Pile-supported Embankment

Wang¹,

Chen²,

Hu³

et al. 2017

JSM

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Semi-analytical solutions for geosynthetic-reinforced and pile-supported embankment

Cited by 46 publications

References 12 publications

Validation of analytical models for the design of basal reinforced piled embankments

Validation of analytical models for the design of basal reinforced piled embankments

Numerical study on the effect of rigid inclusions on existing railroads

Comparative Analysis of Load Responses and Deformation for Crust Composite Foundation and Pile-supported Embankment

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