摘要
基于墙土之间摩擦形成的卸荷拱,并且假设抛物线为拱的形状,结合莫尔圆理论,得出确定抛物线的参数。在极限平衡理论的基础上,根据抛物面所围的有效滑裂土体的体积,推导出一种新的预测短墙土压力的计算模型。通过与传统计算方法和试验的对比,应用此方法得到的土压力计算值更接近试验结果,同时,由于传统方法计算的结果比较保守,所以该方法可以有效的减少建筑材料的浪费。
Based on arching effects of soil mass,a parabolic outline is introduced to calculate the volume of sliding wedge retained by a short structure,which takes into account the friction angle of soil and the friction angle between a wall and soil. An analytical model of earth pressure is proposed to estimate the mechanical response of backfilled openings,emphasizing the effect of load transfer along the interface between the wall and relatively soft backfill. It is found that the arching effects have great influence upon determination of the resultant forces on the supporting structure and the calculation values by the proposed method agree well with the test resuls. The comparisons between discussions and recorded datum highlight some of key factors influencing the resultant forces on short retaining walls.
出处
《土木工程学报》
EI
CSCD
北大核心
2015年第3期79-84,共6页
China Civil Engineering Journal
基金
天津应用基础与前沿技术研究基金(12JCZDJC28000)
国家自然科学基金(11372210)
关键词
拱效应
短挡土墙
抛物形曲线
土压力
arching effect
short retaining structure
parabolic curve
earth pressure
