土工格室柔性桥台变形特性离心模型试验研究  

Experimental Study on Centrifugal Model for Deformation Characteristics of Geocell Flexible Abutment

作　　者：匡希龙[1] 李振[1] 谢海涛[1] 

机构地区：[1]湖南交通职业技术学院,长沙410004

出　　处：《路基工程》2010年第4期53-55,共3页Subgrade Engineering

基　　金：湖南省教育厅2008年度课题(08D060)

摘　　要：通过离心模型试验揭示了土工格室柔性桥台的变形特性,即未加筋桥台产生的位移明显大于土工格室柔性桥台产生的位移;同时,未加筋桥台产生整体滑移,而土工格室柔性桥台因微裂缝的阻断和错位,台背未见破坏。还分析了土工格室的加筋机理,即土工格室在土体中产生的"紧箍"和"网兜"作用,有效减少了桥台的侧向位移,抑制了竖向裂缝的产生并阻断其扩大和贯通,大幅提高了土工格室柔性桥台的稳定性。Deformation characteristic of geocell flexible abutment is revealed through centrifugal model test,i.e.,the displacement of unreinforced abutment is much greater than that of geocell flexible abutment.Meanwhile,unreinforced abutment causes overall sliding,while geocell flexible abutment has no damage on its back due to blockage and misplacement of micro cracks.In addition,the reinforcement mechanism of geocell is also analyzed,that is ＂tightening ring＂ and ＂string bag＂ effect produced in soil mass,which effectively reduces lateral displacement of abutment,inhibits vertical cracks and prevents its expansion and penetration,and thus largely improves the stability of geocell flexible abutment.

关 键 词：离心模型试验 土工格室 柔性桥台 变形特性 

分 类 号：TU411.99[建筑科学—岩土工程]