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通过对桩端未注浆和桩端后注浆的试桩静荷载试验、轴力测试等试验分析,揭示软土地区超长钻孔灌注桩的荷载传递规律和承载性状。得出结果表明:采用桩端注浆工艺加固桩端土,可大幅度提高单桩承载力。
Through the test and analysis of static load test and axial force test of pile unloading and post grouting, the law of load transfer and bearing capacity of ultra-long bored piles in soft soil area are revealed. The results show that using the pile tip grouting technology to reinforce the pile tip can greatly improve the bearing capacity of single pile.