非开挖关键技术在穿越武汉长江砂层中的应用

针对长距离穿越松散砂层会塌孔抱钻的危险，综合应用了精确导向、合理设计钻孔轨迹、扩孔级配、补浆短接和优质泥浆的技术，使该铺管施工顺利完成，为今后同类工程施工提供了经验和指导。

The application of the trenchless key technology in the cross-dig sand of the Yangtze River in Wuhan

For long-distance through loose sand hole collapse will hold the risk of drilling, integrated application of the exact orientation, rational design of trajectory drilling, reaming size distribution, short circuit and high quality make mud slurry technology, to enable the successful completion of pipe laying and construction, which has provided experience and guidance for future similar engineering costruction.