بررسي عملكرد و مباني طراحي خاكريز مسلح با ژئوسل

Investigation on the Performance and Design of Soil Embankment Reinforced by Geocell

يكي از روش هاي نوين جهت پايدارسازي خاكريزها و شيرواني هاي خاكي، استفاده از ژئوسلها ميباشد. در اين مقاله با مروري بر تحقيقات انجام شده در طول دو دهه ي اخير در ارتباط با طبقه بندي ژئوسل و كاربردهاي آن در مهندسي عمران، مكانيزم هاي عملكرد ژئوسل در خاك مسلح مورد بررسي قرار گرفته است. بررسي ها نشان مي دهد در اثر تسليح خاك با ژئوسل، خصوصيات مقاومتي خاك از قبيل چسبندگي، سختي و مدل الاستيسيته، افزايش مي يابد. ولي اين تسليح، تغيير خاصي در زاويه اصطكاك داخلي خاك ايجاد نمي كند همچنين در اين مقاله بررسي هاي صورت گرفته در خصوص تعيين پارامترهاي طراحي خاكريز مسلح شده با ژئوسل و نظريه هاي متداول در طراحي، ارايه شده است

Stabilization and improvement the strength parameters of the soil embankments is one of the major concerns during the road construction and maintenance. Therefore, lots of solution methods including use of geosynthetic, grouting, pre-cast walls and so on are considered to untangle the problem. The mechanisms of the geosynthetic reinforcement can be highlighted as lateral constraint, increased bearing capacity, and tensioned membrane effect. Use of geocell, as a member of three dimentional geosynthetic group, is a cutting edge cost-effective method to reinforce and enhance the soil strength in the last two decades. Geocell is a polymerical cellular product in which the cells often are honeycomb shape when expanded. In this paper, the recent researches about geocell sorts and performances are considered. According to the context, soil reinforcement with geocell cause to increase the strength parameters such as cohesion, stiffness and elastic modulus (E) due to its superior confining effect on unbound materials contain weak soil. Despite that, the frictional angle remains constant by geocell reinforcement. Also, the studies about design parameters and conventional theories for a reinforced embankment with geocell are represented here