城市连拱隧道施工方案研究

结合彭家花园隧道的具体情况，优化了原施工方案。通过施工状态的数值模拟，对施工过程中所采用的两套施工方案进行了验证，推荐合理的开挖顺序及支护方式。在现行施工方案的基础上得到各工序对拱顶及地表沉降的影响，结合现场量测获得的大量信息对隧道的拱顶下沉及地表沉降进行研究，确切地预报了破坏和变形等未来的动态，并在此基础上得到了一些相关的结论，这些成果除了对该工程顺利实施起着十分重要的指导作用外，还可以为以后的类似工程积累经验。

Study of construction plans above cities’double-arch tunnel

Based on the specific condition of the Pengjia Garden Tunnel, the original construction plan is optimized during the construction. According to the numerical simulation of the construction condition, the two sets of construction plans which have been adopted during the construction process have been confirmed, reasonable excavation sequence and supporting methods are also recommended. On the basis of the active construction plan, we can obtain the influence on the arch and surface subsidence caused by the various working procedure. Combining the massive information obtained by the scene gauging, the studies of the settlement of the vault and the surface settlement have been carried out, so that we can exactly forecast the coming developments such as destroy、deformation and so on. Based on this, we can also come to some related conclusions, these achievements not only provide the extremely important instructional function to the project so that it can be carried out smoothly, but also pile up experience and practice material for the similar project in the future.