竖向荷载作用下对拉式挡土墙土压力分布分析  

Analysis of Soil Pressure Distribution of Mutual Anchoring Retaining Wall with Vertical Load

作　　者：吴建清[1] 张宏博[1] 宋修广[1] 李英勇 厉超[1] 

机构地区：[1]山东大学土建与水利学院,济南市250061 [2]山东省交通运输厅公路局,济南市250002

出　　处：《公路》2014年第11期1-6,共6页Highway

基　　金：国家自然科学基金;项目编号51208284;山东省科技发展项目;项目编号2013GSF11603

摘　　要：为了研究对拉式挡土墙支护高填土路段土压力的分布规律及影响因素,依据现场资料合理设计了模型试验,在不同位置埋设了土压力盒,监测了土压力分布情况,并确定了合理数值计算方法,对影响土压力分布的主要因素进行了控制分析。室内模型及数值计算结果表明:数值计算结果与室内模型试验具有较高的吻合度,计算方案合理可行;锚杆高度、预应力及土质是影响对拉式挡土墙土压力分布的主要因素,土体强度衰减对土压力的影响相对极小;土压力大于主动土压力,设计时推荐采用分段设计,锚杆1/2高度以上按静止土压力计算,挡土墙底部土压力按静止土压力的1.3倍设计。Aiming at soil pressure distribution law and influencing factors of mutual anchoring retaining wall on the high soil foundation, the model test is reasonably designed on the basis of field test data. Soil pressure cells are buried in different location, which is used to analyze the distribution of soil pressure. Numerical method is reasonably determined to analyze the key influencing factors of soil pressure distribution. The results show that the numerical method is reasonable and feasible compared with model test data. Anchor height and pressure are the key influencing factors of soil pressure distribution. The influence of strength reduction of soil is relatively low. Soil pressure is larger than active earth pressure. Sectional design is recommended. Static earth pressure is used above half of anchor height. 1.3 times of static earth pressure is used at the bottom soil pressure of mutual anchoring retaining wall.

关 键 词：道路工程 土压力分布 数值模拟 对拉式挡土墙 模型试验 

分 类 号：U417.11[交通运输工程—道路与铁道工程]