中国铁道科学2017，Vol.38Issue(5)：62-69,8.DOI:10.3969/j.issn.1001-4632.2017.05.09
软土地区通缝拼装地铁盾构隧道管片纵缝接头的优化
Optimization for Longitudinal Segment Joint of Metro Shield Tunnel with Straight Joint in Soft Soil Area
摘要
Abstract
The longitudinal segment joint of metro shield tunnel in soft soil area is prone to damage because of the overloading of ground surface.Considering the characteristics of soft soil stratum,the longitudinal segment joint is optimized by the proposed concept of "rigid lining" in the design for the transverse rigidity of shield tunnel in soft soil area,which increases the rigidity and strength of tunnel structure.The flexural rigidity of longitudinal segment joint can be increased by increasing segment thickness locally or integrally,thus the deformation of segment ring is obviously reduced.Although the bending moment of segment ring is generally increased,the decrease amplitude for segment ring deformation is much larger than that for its bending moment.The positions of the connecting bolts between externally or internally open longitudinal joints are designed respectively,and the connecting bolt should be close to the open side of the joint.When the segment ring is divided into blocks,the longitudinal segment joint should be designed at the position of smaller bending moment as possible.At the same time,in order to meet construction conditions,the block number of segment ring should be decreased.The edges and corners of longitudinal segment joint are partly strengthened so as to prevent them from being damaged.The waterproof capability of the longitudinal segment joint of metro shield tunnel can be strengthened through reasonably designing the position and cross section form of waterproof gasket.关键词
地铁隧道/软土地区/隧道横向刚度/管片纵缝接头/管片厚度/连接螺栓/防水密封垫Key words
Metro tunnel/Soft soil area/Transverse rigidity of tunnel/Longitudinal segment joint/Segment thickness/Connecting bolt/Waterproof gasket分类
交通工程引用本文复制引用
黄大维,周顺华,冯青松,罗文俊,张鹏飞..软土地区通缝拼装地铁盾构隧道管片纵缝接头的优化[J].中国铁道科学,2017,38(5):62-69,8.基金项目
国家自然科学基金资助项目(51608200,51478353,51368020,51468021) （51608200,51478353,51368020,51468021）
江西省杰出青年人才资助计划项目(20162BCB23048) （20162BCB23048）
