摘要
隧道开挖引起的地表沉降主要由地层损失引起。在球孔扩张理论的基础上,采用镜像法推导了隧道地表沉降计算公式,可分析在地层损失、埋深、开挖推进距离以及观测点空间位置等不同因素影响下地表沉降的连续动态变化;同时结合上述地表沉降的影响因素和相似理论,通过相似准则之间的函数关系反映地表沉降规律;最后结合工程实测数据对计算公式进行验证,结果表明计算公式较好地体现了地表沉降规律。
Ground settlement induced by tunnel excavation is mainly caused by ground loss. The formula for calculating ground settlement is inferred by image method based on sphere-hole expansion theory. The formula is used to analyze continuous dynamic changes of soil subsidence under the influence of different factors such as ground loss, buffed depth, excavation distance and space location of observation points. At the same time, combining with the mentioned influence factors and similar theory, ground settlement rules can be reflected by adopting functions between similarity criterions. At last, the formula is verified with the measured data from projects. The results show that the formula reflects ground settlement rules well.
出处
《施工技术》
CAS
北大核心
2009年第1期51-54,共4页
Construction Technology
关键词
隧道
地表沉降
地层损失
球孔扩张理论
镜像法
相似准则
tunnel
ground settlement
ground loss
sphere-hole expansion theory
image method
similarity criterion
