【摘要】 为了深入认识山区公路砌石高挡土墙变形破坏的产生机理,结合工程实例,进行深入的现场调查、开展岩土的物理力学试验和现场监测,采用不平衡推力法和数理统计方法,以及运用地下水饱水面积比和地下水排泄系统理论,分析降雨作用下山区公路重力式高挡墙稳定性。研究表明:在强降雨作用下,砌石挡土墙中地下水无法迅速向墙外排泄,使得地下水位骤然上升,其潜在滑动体饱水面积比会因之骤然增大,导致挡土墙的整体稳定性系数骤减,最终将导致浆砌石挡土墙变形加大而产生滑移、鼓出等,这就是大量山区公路砌石重力式高挡土墙病害产生的主要机理之一;在墙身设置足够排水孔和选择渗透性好的填料,是确保山区公路砌石重力式高挡土墙稳定和公路畅通的关键所在。更多还原

【Abstract】 For the sake of researching the deformation and failure mechanism of high masonry retaining walls in the mountain highways,connected with the engineering practice,using the unbalanced thrust method and mathematical statistical method,the global stability analysis of gravity masonry retaining wall under rainfall is analyzed by the field investigation,the physical and mechanical test of soil and field monitoring,based on the groundwater saturated groundwater discharge area ratio and system theory.The results show as follows:Firstly,under the effect of heavy rain,groundwater in the gravity masonry retaining wall can not discharge quickly outward the wall,making a sudden rise in groundwater level,the saturated area ratio in the potential sliding body will suddenly increase,led to the overall stability of retaining wall coefficient is suddenly decreased,masonry retaining wall will eventually lead to increased distortion arising from slip,bulge and other diseases,which is one of the main mechanisms of a lot of high gravity masonry retaining wall diseases in the mountain roads.Secondly,it is the key to ensure the high gravity masonry retaining wall stable and unblocked in the mountain roads that adequate drainage holes in the walls are set,and good filler with good permeability is chosen.更多还原