绵阳绕城高速公路边坡变形监测及对邻近墩台影响分析

发布时间：2018-05-31 21:03

本文选题：边坡 + 深孔位移监测　；参考：《西南科技大学》2015年硕士论文

【摘要】：边坡失稳属于自然灾害中最常见的灾害之一,往往会造成巨大的经济损失,甚至导致人员伤亡。据国土资源部统计：2014年全国发生的边坡问题占地质灾害总数的96.6%。绵阳绕城高速公路与绵三路交叉处边坡自开挖,一直处于变形之中,该边坡的变形导致其上跨桥梁两岸桥台挡块、台帽与桥台背墙交界处出现开裂,部分T梁与桥台背墙产生挤压,大部分支座发生顺桥向的剪切变形。本文采用全站仪自由设站法对该边坡进行坡面水平位移监测,利用滑动式测斜仪对该边坡深部位移进行监测,得出该边坡属于浅层蠕变滑坡,可能存在滑动面大致深度在11m-12m。应用全站仪对上跨桥梁构件进行变形监测,得出桥梁目前处于设计变形范围内,并为避免边坡持续变形对桥梁造成安全影响对边坡采用抗滑桩进行了加固处理。通过监测加固后的边坡发现,边坡累计位移已趋于收敛,边坡处治效果明显。
[Abstract]:Slope instability is one of the most common disasters in natural disasters, which often results in huge economic losses and even casualties. According to the statistics of the Ministry of Land and Resources: the slope problems occurred in 2014 accounted for 96. 6% of the total number of geological disasters. The slope excavation at the intersection of Mianyang Expressway and Mianyang three roads is always in the process of deformation. The deformation of the slope leads to the cracking at the junction of abutment cap and abutment back wall between the abutment cap and abutment back wall and the block of abutment on both sides of the bridge. Some T-beams and abutment back walls are squeezed, and most of the supports are shearing deformation along the bridge. In this paper, the total station free station method is used to monitor the horizontal displacement of the slope, and the sliding inclinometer is used to monitor the deep displacement of the slope. It is concluded that the slope belongs to a shallow creep landslide, and that there may be a sliding surface in the depth of 11m-12m. The total station is used to monitor the deformation of the members of the upper span bridge, and it is concluded that the bridge is currently in the range of design deformation, and in order to avoid the safety impact caused by the continuous deformation of the slope, the anti-slide pile is adopted to reinforce the slope. It is found by monitoring and strengthening that the cumulative displacement of the slope has converged and the effect of slope treatment is obvious.
【学位授予单位】：西南科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U416.14

【共引文献】