之江大桥的西非通航孔桥为混凝土现浇箱梁桥,其箱梁支架位于水中。由于河床上为钱塘江大堤的抛石防护区,机械打入的钢管承载力不高且承载能力不标准,施工时支架难以实施,我部采用了混凝土灌注桩和大钢管支架相结合的复合桩,解决了这个难题,保障了支架的安全。 The West Bridge of Navigable Bridge in Zhijiang Bridge is a concrete cast-in-place box girder bridge whose box girder bracket is located in the water. Due to the river bed for the Qiantang River embankment rubbish protection zone, the mechanical resistance of steel into the pipe load is not high and carrying capacity is not standard, the construction of the stent is difficult to implement, I used a concrete piles and steel pipe support combination of composite piles Solve this problem, to ensure the safety of the stent.