Particle size effect on the strength and failure pattern of reinforced soil retaining wall

• Main Authors: Jui-Chang Hsu, 許瑞章
• Other Authors: Po-Kai Wu
• Format: Others
• Language: zh-TW
• Published: 2008
• Online Access: http://ndltd.ncl.edu.tw/handle/44786751555910593566

碩士 === 雲林科技大學 === 營建工程系碩士班 === 96 === Many geosynthetics-reinforced soil (GRS) retaining wall with granular backfill have been used as permanent and important structure. In view of the above, a series of plane strain model test was performed in this study. The dimensions of the plane strain model wall were 250 cm (width) × 80 cm (depth) × 110 cm (height). Three types of granular sandy gravels and sand with its D50 ranging from 10.1mm to 0.4 mm were used and three types of geogrids with different stiffness were used. Monotonic vertical loading was applied in the model footing which was 85 cm apart from the facing of wall. The deformation patterns of granular soils were observed in the tests through the front transparent acryl plates. A photogrammetric analysis procedures was used to define the thickness of shear zone. Test results showed that the failure strength were increased with an increase in soil particle sizes. The ultimate bearing capacity of footing in GRS could be increased from 1.6 to 3.6 times to that of unreinforced one. The shear zone patterns became distinct after the occurrence of peak strength and the thickness of shear zone were about 16~27 times toD50.