摘要
随着公路交通流量增加及超载车辆增多,交通荷载对支挡结构的受力变形特性影响越来越大。通过FLAC3D软件建立预应力锚索桩板墙空间分析模型,并与现场动应变测试结果进行比较,探讨了交通荷载作用下挡墙的受力变形机制。结果表明:交通荷载在路基与挡墙中所反映的影响深度大致都为2m左右,正常情况下(重型汽车满载、行驶在行车道上)作用在预应力锚索桩板墙上的动土压力大约为该处挡墙静止土压力的10%。
With the increase of traffic and the over-load vehicles, the bearing and deforming behavior of retaining structure is increasingly influenced by traffic loads. According to the prestressed anchor sheet-pile wall, using FLAC3D, the spatial analysis model is established. Combining with the field dynamic strain test, the mechanism of bearing and deforming behavior of retaining structure is studied. The results show that the depth of the traffic loads affected is about 2 meters in both subgrade and retaining wall. Under normal circumstances（fully loaded heavy vehicles, driving on a carriageway）, the dynamic earth pressure of prestressed anchor sheet-pile wall is approximately 10% of earth pressure at rest.
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2010年第2期645-648,共4页
Rock and Soil Mechanics
基金
中南大学博士后基金
863计划(No.2007AA11Z121)
交通部西部科技项目(No.200831878542)
湖南省科技项目(No.03JZY3037)
关键词
预应力锚索桩板墙
动态响应
数值模拟
prestressed anchor sheet-pile wall
dynamic response
numerical simulation
