Comparison of Effects of Using Geosynthetics and Lime Stabilization to Increase Bearing Capacity of Unpaved Road Subgrade

Pancar, Erhan Burak; Akpınar, Muhammet Vefa

doi:10.1155/2016/7129356

Cited by 27 publications

(20 citation statements)

References 16 publications

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“…Almost all the construction technologies were outdated, non-efficient, and in many cases unsafe for use [1][2][3]. Becoming open to new technologies and structural materials provided a strong impact for modernization of the entire construction industry, and until nowadays this trend is still being observed [4][5][6][7][8]. Lack of planning and poor economy management resulted in a huge production of waste, both municipal and industrial, which in many cases were deposited without any control [3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Lessons Learned on Geosynthetics Applications in Road Structures in Silesia Mining Region in Poland

et al. 2019

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The paper aims at the research of pioneering applications of geosynthetic materials used for improvement of anthropogenic material for road contraction challenges in Poland. The presented case study concerns a road embankment construction process within an area of underground mining coal extraction for which significant deformations have been frequently recorded. To improve the bearing capacity of the structure base, the geosynthetic materials were used. The question; however, was how the anthropogenic materials, filling the embankment, will interact with each other over time. The assessment of the structural condition of the motorway surface was performed using the falling weight deflectometer and the calculated modules based on the back-analysis method. They confirmed the effectiveness of the geosynthetics used in the study. They also revealed that the mining exploitation, with simultaneous use of aggregate stabilization with geogrids, did not cause significant changes in the stiffness of the pavement layers. All observations, based on both field and laboratory tests, did not show any negative impact of anthropogenic soils on the structural behavior of geogrids.The present paper describes a case study on road construction works on post-mining areas. It concerns an underground mining coal extraction site where a new motorway was planned to be constructed. However, due to significant deformation of the ground surface, caused by former mining excavations, the sophisticated ground improvement methods were necessary to be applied. For the linear structures, like roads, or other geotechnical investments the mining activity is a major safety threat, thus the need of maintenance efforts increase significantly [14][15][16][17].Recently, a peculiar revolution in the field of understanding and describing the geogrid interaction with the unbound aggregate has been observed. It mainly concerns the road construction and ground mechanical condition improvement. An improved performance of the pavement due to the geosynthetic reinforcement and bearing capacity improvement [18][19][20][21][22][23] depends on main mechanisms [24][25][26]:

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Section: Introductionmentioning

confidence: 99%

Lessons Learned on Geosynthetics Applications in Road Structures in Silesia Mining Region in Poland

et al. 2019

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“…This effect gradually reduces with time as the soil itself becomes stronger due to consolidation and the JGT biodegrades. Hence, JGT is helping in rapid construction of roads like other synthetic geotextiles as also reported by Pancar and Akpınar [15].…”

Section: Modelled Wmm Layermentioning

confidence: 52%

Study on comparative performance of different pavement models incorporated with newly developed jute geotextiles under static loading

Ghosh

Rao

2020

SN Appl. Sci.

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This research paper describes a laboratory-based unpaved pavement model study incorporating new types of jute geotextiles (JGTs) intended for low-volume roads under static loading. Tests on the pavement models were carried out to evaluate the performance of four types of JGTs, viz. (1) grey (untreated) JGT, (2) rot-proof treated JGT (using reasonably eco-friendly chemicals) and (3) two types of jute-polypropylene (PP) blended geotextiles laid in between a modelled Wet Mix Macadam layer and a suitably compacted subgrade layer. Three types of subgrade soils were used from different geo-climatic regions of the Indian subcontinent including Black Cotton soil. Model tank preparation was done by judiciously selecting some combinations of JGT and subgrade soil based on the outcome of a fundamental study on biodegradability behaviour of these JGTs in the experimental saturated soils. Model tanks were water-treated for different durations up to six months to keep the subgrade soil and the JGT 100% saturated uninterruptedly before testing to study the effect of time-dependent biodegradability behaviour of the pavement models with and without JGT both. Experimental results clearly indicate that there is a substantial improvement in stress-strain behaviour of the pavement models due to incorporation of any type of the experimental JGTs over control models. The time-dependent model study reveals improvement in stress-strain behaviour of the system in spite of degradation of the JGTs, and jute-PP blended JGT is most effective in improving the pavement models. This indicates that consolidation of subgrade has occurred within a period of 3-6 months.

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“…Geosynthetics have recently found wide application in the design and construction of embankment-type landfills. This application has been triggered by the economic and technical advantages that geosynthetics can offer when compared to more traditional materials [8][9][10]. The geogrids used in the construction process should maintain their performance characteristics up to 100 years, according to the standards.…”

Section: Introductionmentioning

confidence: 99%

Landfill Slope Stability Improvement Incorporating Reinforcements in Reclamation Process Applying Observational Method

et al. 2020

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This paper concerns a case study presenting one of the biggest landfills in Poland that required application of complex engineering works to extend the deposing capacity of the structure. The shear strength parameters of the subsoil and waste material used for analyses were based on geotechnical investigation and were then applied in slope stability analyses of the landfill. For the purpose of safety management of the new development and reclamation plan for the landfill, an observational method was applied to increase the geotechnical safety of the structure. The slope reinforcement methods mainly included the geogrid, geocomposite, and berms construction. However, much of the uncertainty associated with the stability of the geogrid-reinforced slope is related to the time-dependent deformation of geosynthetic materials. For the purpose of changes in the geogrid parameters with time, the samples were excavated from the landfill slope after 20 years of exploitation and analyzed in the laboratory. The tests allowed precise determination of the material properties, changing geometry, and mechanical properties like tensile strength and strain. Obtained results were compared to parameters of the brand-new geogrid samples. The tests indicated only insignificant changes in geosynthetics, physical, or mechanical performance properties, and the slope has not been compromised in its stability or performance.

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Comparison of Effects of Using Geosynthetics and Lime Stabilization to Increase Bearing Capacity of Unpaved Road Subgrade

Cited by 27 publications

References 16 publications

Lessons Learned on Geosynthetics Applications in Road Structures in Silesia Mining Region in Poland

Lessons Learned on Geosynthetics Applications in Road Structures in Silesia Mining Region in Poland

Study on comparative performance of different pavement models incorporated with newly developed jute geotextiles under static loading

Landfill Slope Stability Improvement Incorporating Reinforcements in Reclamation Process Applying Observational Method

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