摘要
高速公路下伏采空区是路基路面及桥梁工程的严重隐患。高速公路下伏采空区在探测、排查的基础上,进行采空区稳定性评价,需对其地表各种变形值进行预计。本文采用概率积分法对采空区地表移动与变形值进行预计,计算并绘制出采空区主断面上的变形曲线;进而根据预计后的变形曲线,对采空区的稳定性做出准确的评价。实例预计结果表明,水平变形、地表倾斜和曲率均超过变形控制指标,采空区欠稳定,并以预计结果作为设计经济可行、技术可行的高速公路下伏采空区治理方案的依据。
The mined-out areas which are beneath highways are serious hidden dangers to road subgrade and bridge pro- jects. Based on the detection and investigation of mined-out areas, it needs to predict different kinds of deformation about the surface of highways when making stability evaluation for mined-out areas. The paper adopted the method of probability integral to estimate the movement and deformation of mined-out areas surface, then calculated and plotted out the deformation curve of the main section of mined-out areas. According to the deformation curve after prediction, an accurate assessment to the stability of mined-out areas was made. The predicted results of the examples showed that the horizontal deformation, the tilt and the curvature of the surface all excee- ded the control index of the deformation, and the mined-out area was not so stable. Meanwhile it designed the economically and techni- cally feasible governance program on the basis of predicted results.
出处
《测绘科学》
CSCD
北大核心
2012年第2期97-99,共3页
Science of Surveying and Mapping
基金
道路灾变防治及交通安全教育部工程研究中心开放基金项目(kfj090305)
关键词
高速公路
采空区
地表变形
概率积分法
控制指标
highway
nined-out area
surface deformation
probability integral method
control index
