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南水北调配套工程通州支线工程5#—6#顶管区间采用直径为1.8 m的双排平行钢管顶进,整个管线在淤泥质粉质黏土和粉沙层中顶进,选用2台泥水平衡顶管机施工。本次较详细地介绍了钢管顶管的施工工艺及质量控制要点,确定了双排平行钢管顶管的中心间距和错位纵距,保证了两排顶管安全有效施工,同时施工过程中通过对顶力和顶进轴线、减阻泥浆质量的控制,确保了顶进工作的顺利进行,可为今后类似工程施工提供参考。
The South-to-North Water Diversion Project Tongzhou Extension 5 # -6 # pipe jacking section with a diameter of 1.8 m double row of parallel steel pipe jacking, the entire pipeline in the silty silty clay and silt sand into the top, selection of 2 mud balance pipe Machine construction. The construction process and quality control points of the steel pipe jacking pipe are introduced in detail. The center spacing and the misalignment of the double-row parallel pipe jacking pipe are determined to ensure the safe and effective construction of the two rows of jacking pipes. At the same time, Top force and the top of the axis, drag reduction mud quality control to ensure the smooth progress of the jacking work, for future similar projects provide a reference.