摘要
随着全国各大城市地铁热的兴起,隧道的近接施工已成为一项重要且亟待解决的课题.通过近接度的划分、地表沉降变形规律的研究、近接施工的数值模拟等方面,介绍了该方向的研究现状,提出要真实反映近接施工就必须考虑施工过程中的"时间-空间-工法"效应,而评价既有线安全性的控制基准值则应根据具体工程的近接情况、所处的工程地质条件和具体的结构现状而定,非笼统地取一两个经验值所能代替.
With the rising of ＂subway-hot＂ in big cities, the approaching excavation of the tunnel has become an important and urgent issue needed to resolve. The concept of approaching excavation is introduced at first, and then the research status of this issue from the differentiating of approach- degree, the study of law of ground subsidence and the numerical simulation of approaching excavation are discussed. At last, the ＂time-space-technics＂ effect in the construct process is proposed. The control value about evaluating the existing line safe should depend on approach situation, engineering geological conditions, status in quo of structure of the projection, and should not select one or two general experience value instead.
出处
《北京建筑工程学院学报》
2008年第3期30-34,共5页
Journal of Beijing Institute of Civil Engineering and Architecture
