作　　者： (费彩会）; (朱建明）; (林庆涛）;

出　　处： 《地下空间与工程学报》 2017年第4期1009-1015,共7页

摘　　要： 关于考虑土拱效应的临近地下室外墙影响下的挡土墙主动土压力的研究目前已经取得了很多成果,但对考虑地表附加应力影响时的研究还有较多的不足。研究发现,考虑地表附加应力时挡土墙后破裂土体的平均竖向应力σv的求解公式与地表到墙后土体破裂面的最短距离H1和张拉裂缝的深度zc的正负以及两者之间的关系有关,以此为基础将该问题分为4种情况进行研究,推导出了各情况下相应的σv的求解公式,并得得到了其相应的主动土压力计算公式;同时,通过对主动土压力积分推导出了各情况下相应的主动土压力合力和倾覆力矩的计算公式,由此可以计算合力作用点的高度。算例表明,地表附加应力的存在会对主动土压力的分布以及合力作用点的位置有较大的影响,证明了本文研究的必要性。 At present,the research on active earth pressure behind retaining wall adjacent to existing basements exterior wall considering soil arching effects has achieved a lot,but there are many deficiencies in the research on considering the impact of the additional ground for stress. Study found that the solving formula for the vertical stress σv of the soil behind retaining wall is related to the plus-minus sign of H1 and zcas well as the relationship between them.On the basis,the problem can be divided into four situations to study. According to the boundary conditions in different situations,we can derive the corresponding solving formula of σv. At the same time,we can get the corresponding calculation formula for active earth pressure. The integration for active earth pressure can derive the corresponding calculation formula for earth pressure force and overturning moment. Thus,we can calculate the height between the point of resultant force and the bottom of wall. The example shows that the existence of additional stress of earth surface has a great influence on the distribution of active earth pressure and the location of the point of resultant force,which prove the necessity of this research.

关 键 词： 地表附加应力 邻近建筑物 土拱效应 主动土压力 挡土墙