摘要
生态袋加筋柔性挡土结构对地基承载力要求低,具有良好的地基条件适应性,并可以形成绿色挡土墙或边坡,是工程措施与自然和谐共存的一种挡土结构形式。生态袋面层和面层后填土与加筋格栅的连接强度大小,是控制生态挡土结构稳定性的关键。采用室内试验的方法,研究生态袋和填土与加筋格栅的连接强度,结果表明:生态袋与加筋格栅界面摩擦角仅在9°～15°,远小于生态袋间的界面摩擦角(20°以上)。为解决生态袋与加筋格栅界面摩擦强度低的问题,提出了反包加筋连接的新连接形式,反包加筋连接的界面摩擦强度高于生态袋间的界面摩擦强度,解决了生态袋墙面可能在生态袋与加筋格栅界面发生滑动破坏的问题。试验结果还表明,生态袋装不同填土时其抗剪强度(摩擦强度)有明显差别,袋装红粘土时,生态袋界面摩擦角为20.4°,袋装碎石时,生态袋界面摩擦角为25.5°。
The flexible soil bag reinforced retaining structure has low requirement for the bearing capacity of the foundations. This kind of retaining wall is suitable for foundations and can form green retaining wall or slope. It is a kind of ecological retaining wall which presents harmony between engineering structure and surrounding environment. The connection strength between soil bag face and the geotextile is the key to the stability of the ecological retaining walls. The connection strengths between soil bag face and the geotextile and between filling soil and the geotextile have been obtained by laboratory tests. The results show that the friction angles between soil bag face and the geotextile are 9°- 15° for different soils filled into the soil bags, which is much smaller than the friction angle between soil bag faces （above 20°）. A new connection style of reverse package has been put forward to overcome the problem of low connection between soil bag face and the geotex- tile. The friction strength between the soil bag face nection is higher than that between soil bag faces. and the geotextile with the reverse package con- The reverse package method can overcome the slide failure along the interface of soil bag and geotextile. The test results show that the shearstrength （friction strength） between soil bags has significant difference with different filling soils. The friction angle of soil bag face is 20.4° when red clay is filled and 25.5° when gravel is filled.
出处
《广西大学学报（自然科学版）》
CAS
北大核心
2013年第1期62-66,共5页
Journal of Guangxi University（Natural Science Edition）
基金
教育部博士点基金资助项目(20100094110002)
广西交通科技项目(桂交综合发[2009]95号)
关键词
柔性挡土结构
生态袋
连接强度
加筋材料
flexible retaining structure
ecological soil bag
connection strength
reinforced material
