scholarly journals EFFECT OF GEOGRID REINFORCEMENT IN WEAK SUBGRADES

2020 ◽  
Vol 18 (65) ◽  
Author(s):  
Kasun Wimalasena
Keyword(s):  
Geogrid Reinforcement ◽  
Weak Subgrades

Field observations on the load–strain–time behaviour of geogrid reinforcement

1994 ◽  
Vol 31 (4) ◽  
pp. 564-569 ◽  
Author(s):  
R.J. Fannin
Keyword(s):  
Tensile Strength ◽  
Field Data ◽  
Constant Load ◽  
Reinforced Soil ◽  
Mean Annual Temperature ◽  
Creep Tests ◽  
Geogrid Reinforcement ◽  
Rapid Loading ◽  
Strip Test ◽  
Relationship Of

Field data are reported that describe the load–strain–time relationship of geogrid reinforcement in a reinforced soil structure. The data are for a period exceeding 5 years and reveal a continued strain in the reinforcement, which occurs at nearly constant load. The response to loading is attributed to creep of the polymeric material. A comparison of the field data with laboratory isochronous load–strain curves, from rapid loading creep tests performed at a temperature similar to the mean annual temperature in the backfill soil, shows the curves describe very well the magnitude of creep strains observed in the field. Implications of the load–strain–time performance data are assessed with reference to the use in design of a tensile strength established from the rapid-loading creep test and wide-width strip test. The need to clarify, in design of polymeric reinforced soil structures, between a safe and allowable tensile strength is emphasized. Key words : reinforced soil, geogrid, creep, tensile strength, strain.

Geogrid Reinforced Brick Buildings for Earthquake Disaster Mitigations

2021 ◽  
Author(s):  
Biplab Behera ◽  
Radhikesh Prasad Nanda
Keyword(s):  
Transverse Wall ◽  
Plane Shear ◽  
Qualitative Comparison ◽  
Geogrid Reinforcement ◽  
Building Model ◽  
Single Room ◽  
Out Of Plane ◽  
Lateral Strength ◽  
Diagonal Crack ◽  
Complete Collapse

Abstract In the event of a severe earthquake, the walls of brick buildings experience in-plane shear and out-of-plane bending, leading to diagonal crack and corner failure respectively. In this study, an experimental investigation was carried to observe the above damages on brick masonry buildings reinforced with geogrid embedded in bed joint mortar of the walls. It was observed that the geogrid reinforced brick panels showed better shear strength, lateral strength, ductility, etc. A qualitative comparison was made using a sinusoidal shake table test on a one-fourth single-room building model consisting of two sets of corner walls with and without geogrid reinforcement. It was observed that the corner wall without reinforcement showed crack initiation at 0.45g and complete collapse with over toppling of the transverse wall at 0.90g, while no sign of damages for the corner walls strengthened with geogrid reinforcement for any level of shaking.

Use of Geotextiles in Roads Over Weak Subgrades

2021 ◽  
pp. 365-373
Author(s):  
Abdullah Ansari ◽  
Prashant B. Daigavane ◽  
Shahrukhakhan Pathan ◽  
Naseer Shaikh ◽  
Firoj Shaikh
Keyword(s):  
Weak Subgrades

scholarly journals Reduction in Pavement Thickness by Using Geogrid

2018 ◽  
Vol 7 (3.3) ◽  
pp. 17
Author(s):  
Sruthi Vennamaneni ◽  
Nookapati Raju Aketi ◽  
Sravanthi Paisa
Keyword(s):  
Double Layer ◽  
High Strength ◽  
Red Soil ◽  
Tropical Countries ◽  
Geogrid Reinforcement ◽  
Naturally Occurring ◽  
Low Volume ◽  
Pavement Construction ◽  
Grid Reinforcement ◽  
Pavement Thickness

An effective way of improving the properties of naturally occurring soils for pavement construction is by using geo-synthetics. In many tropical countries, weak lateritic sub grades are common and often rejected after proof rolling during construction due to poor strength. The main aim of this research was to check the effect of geo-grid reinforcement  on  CBR value on a sample of relatively Red soil subgrade  under soaked and Unsoaked conditions and to Establish the effect of geogrid reinforced subgrade on the design thickness of low volume paved roads. Even though Red Soil has high strength but if we apply geogrids results going to be checked. Then by placing a layer of a Bi-axial geogrid at different heights like one layer at h/2, two layer at h/5 top and bottom ,three layers at h/6 top, bottom and middle , the effects of geogrid reinforcement on California Bearing Ratio values are investigated. This was undertaken for three strengths of geogrid and without geogrids in both soaked and Unsoaked conditions. The CBR values were used to determine the pavement thicknesses. The results indicate that the pavement thickness is reduced by 21.31% by using double layer in the Soaked condition i.e. Worse condition.  

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