Rectangular & Circular Pipe Jacking Engineering

• Technical planning considers jacking force, intermediate jacking stations, friction reduction, face-pressure balance, alignment control, settlement and receiving conditions.
• Rectangular sections improve usable underground space for pedestrian, vehicular and commercial passages while reducing extensive surface excavation.
• Equipment resources include rectangular, circular and composite pipe-jacking machines for different section sizes and ground conditions.

Selected Applications

• Fuzhou Railway Station Transfer Passage: The 109.5 m rectangular jacking passage has an outer section of 10.8 m x 5.9 m and approximately 4.5 m cover. A 10-cutter earth-pressure-balance rectangular jacking machine was used while crossing composite ground, passing above operating Metro Line 1 and beneath major municipal utilities.
• Baolong MixC / Baima Road Rectangular Passage, Fuzhou: Two parallel double-level passages were constructed using a modular 9.04 m x 9.26 m multi-cutter earth-pressure-balance rectangular jacking machine. Each drive is about 46.5 m long, with cover of approximately 2.5-6.0 m and a gradient of about -5.9%.
• Tangxun Lake Wastewater Discharge Project, Wuhan: The lake-crossing section totals approximately 3,773.82 m, arranged as four shafts and three drives. The longest single drive is about 1,600 m, using DN4000 reinforced-concrete pipe with an outside diameter of about 4.8 m through complex mixed strata beneath Tangxun Lake.

• 技术策划重点考虑顶力、中继间、减摩、掌子面压力平衡、姿态控制、沉降及接收条件。
• 矩形断面可提高人行、车行及商业通道的地下空间利用效率，并减少大面积地面开挖。
• 设备资源包括适应不同断面尺寸和地层条件的矩形、圆形及复合顶管设备。

代表性应用

• 福州火车站换乘通道： 顶管通道长度 109.5 米，外包断面 10.8 米 x 5.9 米，覆土约 4.5 米，采用 10 刀盘土压平衡矩形顶管机施工，需穿越复合地层、上跨运营地铁 1 号线并下穿重要市政管线。
• 福州宝龙万象广场下穿白马路矩形通道： 采用模块式 9.04 米 x 9.26 米多刀盘土压平衡矩形顶管机施工两条并行双层通道，单条顶进约 46.5 米，覆土约 2.5-6.0 米，坡度约 -5.9%。
• 武汉汤逊湖污水处理厂尾水排江工程： 穿湖段总长度约 3,773.82 米，采用四井三顶程布置，单程最长约 1,600 米，使用 DN4000 钢筋混凝土管（外径约 4.8 米）穿越汤逊湖下方复杂复合地层。