考虑内部预制结构的盾构隧道抗震性能分析

发布时间：2018-04-13 00:17

本文选题：盾构隧道 + 预制结构　；参考：《地下空间与工程学报》2016年S2期

【摘要】：近年来,预制结构逐渐应用于隧道内部结构,如上海复兴东路隧道、南京纬三路隧道等。与现浇结构相比,预制结构具有生产效率高、产品质量好、工人劳动强度低、保护环境等优点。但是,其连接部位薄弱,抗震性能相对较差。以某盾构隧道为背景,基于目前盾构隧道抗震设计不考虑内部结构的现状,采用动力时程方法对比分析了预制和现浇两种内部结构形式对盾构隧道管片抗震性能的影响,从而系统评价了考虑内部预制结构的盾构隧道抗震性能。结果表明:设计地震作用下,考虑内部结构能明显改善盾构隧道管片的抗震性能,且内部现浇结构优于内部预制结构;罕遇地震作用下,内部现浇结构会先于盾构隧道管片破坏,且内部现浇结构相比内部预制结构更为不利。
[Abstract]:In recent years, prefabricated structures have been gradually applied to the internal structure of the tunnel, such as Shanghai Fuxing East Road Tunnel, Nanjing Weitou third Road Tunnel and so on.Compared with cast-in-place structure, prefabricated structure has the advantages of high production efficiency, good product quality, low labor intensity and environmental protection.However, the connection site is weak and the seismic performance is relatively poor.Taking a shield tunnel as the background, based on the fact that the current seismic design of shield tunnel does not consider the internal structure, the influence of precast and cast-in-situ internal structure on the seismic behavior of shield tunnel segment is analyzed by using dynamic time-history method.The seismic performance of shield tunnel considering internal prefabricated structure is systematically evaluated.The results show that considering the internal structure can obviously improve the seismic performance of shield tunnel segments, and the internal cast-in-place structure is better than the internal prefabricated structure.The internal cast-in-place structure will be destroyed before the shield tunnel segment, and the internal cast-in-place structure will be more disadvantageous than the internal prefabricated structure.
【作者单位】：同济大学岩土及地下工程教育部重点实验室;同济大学地下建筑与工程系;江苏省土地勘测规划院;溧阳市水利局;驻马店市板桥水库管理局;
【基金】：国家自然科学基金(51678438) 上海市科学技术委员会(13231200503&16DZ1200302&16DZ1201904) 上海市教育发展基金会(13CG17)
【分类号】：U455.43;U452.28

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