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矩形顶管自身具有明显不同于普通顶管的特点,断面大,需要的顶推力大,方向控制要求严格,始发与到达的风险高,地层稳定控制难度大。本文对矩形顶管从设计、设备选型、施工控制方法等环节进行论述,并介绍深圳地铁梅景站7700×4500截面过街通道顶管施工实例,为开展矩形顶管技术的推广应用提供借鉴参考。
Rectangular pipe jacking has its own characteristics that are obviously different from those of ordinary jacking pipe. The cross section is large, the required thrust force is large, the direction control is strict, the risk of origin and arrival is high, and the stratum stability control is difficult. This paper discusses the design, equipment selection, construction control methods and other aspects of rectangular pipe jacking, and introduces the pipe jacking construction of 7700 × 4500 cross-section channel in Meijing Subway Station of Shenzhen Metro, providing references for the popularization and application of rectangular pipe jacking technology .