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本文依托大唐芙蓉园站南端设置的高10m、宽12m的超大断面地铁区间存车线的施工,对该存车线隧道结构的稳定情况进行了模拟分析,研究了不同开挖距离隧道结构的受力特征,基于施工中存在的拱顶沉降,且拱腰的位移要高于拱脚位移以及在整个施工过程应力最大值会出现在整个隧道深度范围内的拱腰处以及隧道洞口拱顶处的特征,建议并采用的双侧壁及200m超长管棚施工措施,对地下施工造成的地面沉降起到了很好的控制作用,当隧道建造完工后,地表的累积最大值控制在100mm以下,周边地下管线累积沉降值小于60mm。对地铁隧道暗挖施工工程上方土体塌落起到了很好的防治作用,对本地铁隧道施工提供了可靠稳定的质量和安全技术措施。
This article relies on the Datang Furong Park Station set up at the southern tip of 10m, 12m wide cross-section of the subway section of the construction of the deposit line, the deposit line of the tunnel structure stability analysis of the tunnel structure of different excavation distance The stress characteristics are based on the vault settlement existing in the construction. The displacement of the arch waist is higher than the displacement of the arch foot, and the maximum stress in the entire construction process will appear at the arch waist and the vault of the tunnel entrance The proposed double-sided wall and 200m long pipe shed construction measures have played a very good role in controlling ground subsidence caused by underground construction. When the tunnel construction is completed, the cumulative maximum of the ground surface is controlled below 100mm, Surrounding underground pipeline cumulative settlement value is less than 60mm. It has played a very good role in prevention and control of soil slump above the tunnel construction of underground tunnels and has provided reliable and stable quality and safety technical measures for the construction of local railway tunnels.