Experimental study on the inclusion of soilbags in retaining walls constructed in expansive soils

Wang, Liu-Jiang; Liu, Sihong; Zhou, Bin

doi:10.1016/j.geotexmem.2014.11.002

Cited by 40 publications

(12 citation statements)

References 19 publications

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“…In practical applications, the geotextile containers are typically cuboidal shaped and fully filled with sands or gravels such that they can be easily stacked side by side into multiple layers as partial replacement of weak ground (Matsuoka and Liu, 2006) or as facings installed in front of geosynthetic-reinforced soil (GRS) retaining walls (Tatsuoka et al, 2007). Geotextile-wrapped soil (GWS), which incorporates the reinforcing mechanisms in both planar-and 2D cellular-form GRS, has been proven to be effective for constructing retaining structures (Wang et al, 2015), slope protections (Xu et al, 2008) and roads (Matsuoka et al, 2010), among others. Some authors have reported the application of GWS assemblies as damping layers to reduce traffic-induced vibrations (Muramatsu et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

An analytical solution for geotextile-wrapped soil based on insights from DEM analysis

Cheng

Yamamoto

Thoeni

et al. 2017

Geotextiles and Geomembranes

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This paper presents a novel analytical solution for geotextile-wrapped soil based on a comprehensive numerical analysis conducted using the discrete element method (DEM). By examining the soil-geotextile interface friction, principal stress distribution, and stress-strain relations of the constituent soil and geotextile in the DEM analysis, a complete picture of the mechanical characterization of geotextile-wrapped soil under uniaxial compression is first provided. With these new insights, key assumptions are verified and developed for the proposed analytical solution. In the DEM analysis, a near-failure state line that predicts stress ratios relative to the maximums at failure with respect to deviatoric strain is uniquely identified; dilation rates are found to be related to stress ratios via a single linear correlation regardless of the tensile stiffness of the geotextile. From these new findings, the assumptions on the stress-state evolution and the stress-dilatancy relation are developed accordingly, and the wrapped granular soil can therefore be modeled as a Mohr-Coulomb elastoplastic solid with evolving stress ratio and dilation rate. The development of the proposed analytical model also demonstrates an innovative approach to take advantage of multiscale insights for the analytical modeling of complex geomaterials. The analytical model is validated with the DEM simulation results of geotextile-wrapped soil under uniaxial compression, considering a wide range of geotextile tensile stiffnesses. To further examine the predictive capacity of the analytical model, the stress-strain response under triaxial compression conditions is solved analytically, taking both different confining pressures and geotextile tensile stiffnesses into account. Good agreement is obtained between the analytical and DEM solutions, which suggests that the key assumptions developed in the uniaxial compression conditions also remain valid for triaxial compression conditions.

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Section: Introductionmentioning

confidence: 99%

An analytical solution for geotextile-wrapped soil based on insights from DEM analysis

Cheng

Yamamoto

Thoeni

et al. 2017

Geotextiles and Geomembranes

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“…The use of soilbags has recently been extended to earth-retaining structures, such as retaining walls (Liu et al 2019;Portelinha et al 2014;Wang et al 2015) and slopes (Liu et al , 2015Wang et al 2019). Many researchers have claimed that the stability of earth-retaining structures constructed using soilbags is closely related to their interlayer friction, on which considerable research has been conducted using shear tests (Ansari et al 2011;Basudhar, 2010;Krahn et al 2007;Liu et al 2016., Lohani et al 2006Matsushima et al 2008).…”

Section: Introductionmentioning

confidence: 99%

Effect of infilled materials and arrangements on shear characteristics of stacked soilbags

Fan

Liu

Cheng

et al. 2020

Geosynthetics International

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The Shear characteristics of stacked soilbags are related to their interlayer arrangements and properties of the materials with which the bags(geosynthetics) are filled. To study the effects of those factors on the shear strength and failure mode of stacked soilbags, a series of shear tests were conducted. The results show that although the shear failure surface occurred at the horizontal interface between soilbags when they were arranged vertically, it was ladder-like when the soilbags were arranged in a staggered manner. The angle of insertion was found to govern the shape of the shear failure surface, and, thus, the final shear strength of soilbags arranged in a staggered manner. Two shear failure modes of the stacked soilbags were observed with different infilled materials. When the frictional resistance of the contact interface was smaller than the shear strength of the materials with which the bags had been filled, only interlayer sliding failure occurred. Otherwise, the simple shear failure of materials filling the bags occurred first, followed by interlayer sliding failure.

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“…Finite element method was adopted for analysing the behaviour of soilbags and the results have shown that soilbags can offer high bearing capacity and potentially beneficial damping effects [8][9][10][11]. By virtue of these excellent performance characteristics and their advantages of low cost, environmental friendliness, and simple technology, soilbags have been widely used in many project fields [1,2,[4][5][6][7][12][13][14][15][16][17][18]. However, it has been found that the connections among an aggregation of soilbags are weak, thereby limiting their mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

A New Structure of Geotextile Called Soil Nets for Reinforcement

Xiong

Tian

et al. 2017

Advances in Materials Science and Engineering

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This paper proposes a new reinforcement structure called soil nets firstly, which is capable of strengthening foundations, slopes, and other structures with better effect than that of soilbags. This proposed geotextile structure typically contains several layers of soil net, which are placed in a unique way. One layer of soil net can be described as a collection of spherical soilbags that are connected together in two directions, one in which they are connected by ropes and another in which they are connected by the PP woven bags that contain the soil. A mechanical property analysis of the soil nets shows that the yield stress of the soil within the soil nets is improved, the tensile capacity of the soil nets is greater than that of the soil with which it is filled, and the equivalent coefficient of interlayer friction between the connected soil nets is larger than that for soilbags. Applications of this new reinforcement structure in the reinforcement of a foundation and a slope are considered, and the corresponding reinforcement effects are calculated. The calculation results demonstrate that the soil nets concept yields efficient reinforcement structures with many advantages.

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Experimental study on the inclusion of soilbags in retaining walls constructed in expansive soils

Cited by 40 publications

References 19 publications

An analytical solution for geotextile-wrapped soil based on insights from DEM analysis

An analytical solution for geotextile-wrapped soil based on insights from DEM analysis

Effect of infilled materials and arrangements on shear characteristics of stacked soilbags

A New Structure of Geotextile Called Soil Nets for Reinforcement

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