城市地铁附属结构大断面矩形顶管的施工及应用

Construction and Application of Metro Subway Attachment Large Section Rectangular Pipe Jacking

由于地下通道的建设受到周围环境的限制,越来越多的城市轨道交通车站附属入口与主站出入口相连接,尤其是在市中心繁华路段交通拥挤的压力,地下管线的迁改和周围环境的影响。因此,如何在各种管线层叠密布的交通道路上修建一条过街通道,减少施工对交通的影响,减少管道的迁改以及安全快速地建设已成为人们关注的焦点。传统的明挖法施工比较成熟,而且工程造价较低,但需关闭道路交通,影响地面道路。另外,通道靠近周围的建筑易引起建筑物的变形或开裂。大断面矩形顶管技术以其断面利用率大,覆土浅,施工成本低等优点,近年来被广泛地用于城市地铁车站出入口等建设中,技术水平已相当成熟。

As the construction of the underground passage is restricted by the surrounding environment, more and more entrances and entrances of the urban rail transit station are connected with the main station entrance, Especially in the downtown section of the traffic congestion pressure, the underground pipeline migration and the impact of the surrounding environment. Therefore, how to build a cross-street channel on a variety of pipelines and reduce the impact of construction on traffic, reduce the relocation of pipelines, the construction of safe and rapid construction has become the focus of attention. The traditional excavation method is relatively mature, and the project cost is low, but the need to close the road traffic, affecting the ground road. In addition, the channel near the surrounding buildings which is easy to cause the building deformation or cracking. Large-scale rectangular pipe jacking technology with its cross- section utilization, shallow cover, low construction costs, in recent years has been widely used in urban subway station entrance and other construction, the technical level has been quite maitre.