椭圆形基坑支护土压力分布理论初探  

Theoretical analysis of soil pressure acting on elliptical excavation support

作　　者：李大鹏[1] 唐德高[1] 黄牧[1] 钱岳红 杜维国 

机构地区：[1]解放军理工大学国防工程学院爆炸冲击防灾减灾国家重点实验室 [2]解放军92303部队 [3]解放军96528部队

出　　处：《河海大学学报（自然科学版）》2014年第4期332-336,共5页Journal of Hohai University(Natural Sciences)

基　　金：国家自然科学基金(51021001)

摘　　要：为使基坑设计更加科学合理,分析了椭圆形基坑支护的变形和土压力分布情况。结果表明:椭圆形支护上存在4个土压力转变点,在转变点处土压力会发生主、被动之间性质的转变;作用于支护上的土压力值是区别于经典理论的"类主动土压力"和"类被动土压力",它们之间存在一定的比例关系。根据椭圆形支护上土压力的分布模式,提出了3种确定椭圆形支护土压力的方法。In order to scientifically and rationally design excavations, we analyze the deformation and soil pressure distribution of an elliptical excavation support. The results show that there are four soil pressure changing points on the elliptical excavation support, similar active soil pressure and similar positive soil pressure change at these points, and there is a proportional relationship between the similar active soil pressure and similar positive soil pressure, in contrast to the classical theory. According to the distribution modes of soil pressure acting on the elliptical excavation support, we propose three methods for determining the soil pressure.

关 键 词：椭圆形基坑 类主动土压力 类被动土压力 土压力分布模式 

分 类 号：TU472[建筑科学—结构工程]