地铁隧道开挖引起地表沉降的数值模拟研究 numerical simulation study of the impact of excavation of metro tunnels on land subsidence.pdfVIP

第24 卷第3 期 安 徽 建 筑 大 学 学 报 Vol.24 No.3 2016 年6 月 Journal of Anhui Jianzhu University June.2016 DOI: 10.11921/j.issn.2095-8382 地铁隧道开挖引起地表沉降的数值模拟研究 孟益平，徐林海 （合肥工业大学土木与水利工程学院，安徽合肥 230009） 摘 要：大中型城市修建地铁是未来城市建设的一个重要方向，但是城市中环境复杂，地表沉降控制要求 严格。因此，研究隧道开挖地表沉降变化规律，对沉降控制具有重要的实践意义。文章运用有限元数值模 拟方法对青岛某标段地铁隧道工程进行分析，结合数值计算结果与现场实测数据，研究隧道在由断面开挖 对地面沉降变化规律的影响，对比实际隧道开挖的监控数据，模拟结果表明，地表沉降仍在安全范围内， 可以为类似工程沉降控制提供参考。 关键词：地表沉降；数值模拟；断面转换；地铁隧道。 中图分类号：U456 文献标识码：A 文章编号：2095-8382(2016)03-008-04 Numerical Simulation Study of the Impact of Excavation of Metro Tunnels on Land Subsidence MENG Yiping， XU Linhai (School of Civil Engineering, Hefei University of Technology, Hefei 230009, China) Abstract ：The construction of subways is important in the development of large and medium-sized cities, but the urban environment is complicated, and the control of the surface subsidence needs to be strict. Therefore, it is of great practical significance to study the change regulation of tunnel excavation. In this paper, a metro tunnel engineering in Qingdao is analyzed by the numerical simulation method. The ground subsidence change regulation in the construction of the tunnel with conversion section is studied with the results of numerical calculation and the field measure data. The monitoring data and the simulation data are compared. The results show that the ground subsidence is controlled in safe scale, and it can provide reference for the study of ground surface subsidence in similar projects. Keywords ：Surface subsidence; Numerical simulation; Section conversion; Metro tunnel. 表产生的不利影响，尽可能减少不必要的经济损 0 引 言