本工程根据终压力估算单桩竖向承载力特征值,估算值与静载荷试验结果基本相符;其估算承载力要比按照勘察报告提供的土力学指标试算值有一个较大幅度的提高。因此,当静压管桩桩身较长且桩端持力层为坚硬岩土层时,压桩终压力大,其单桩竖向承载力亦大。这种情况下,在桩身承载力允许时,加大压桩终压力可以提高单桩竖向承载力,并且终压。 The project estimates the eigenvalue of vertical bearing capacity of single pile according to the final pressure. The estimated value basically agrees with the static load test result. The estimated bearing capacity has a larger increase than the calculated value of soil mechanics index provided by the survey report. Therefore, when the hydrostatic pipe pile is long and the pile bearing layer is a hard rock soil, the final pressure of piling is large and the vertical bearing capacity of the pile is also large. In this case, when the pile bearing capacity is allowed, increasing the final pressure of piling can improve the vertical bearing capacity of the pile, and the final pressure.