深水大直径嵌岩钢管桩施工期风险分析

对施工期深水桩基作了基于位移的可靠度分析,采用蒙特卡洛有限元方法,计算得到桩基随地基基床系数、嵌岩深度、桩长、桩径、桩身弹性模量、桩身重度及桩顶水平荷载等参数变化的失效概率;结合可靠度计算的结果,采用模糊数学理论对桩基直接经济损失进行分析,计算得到桩基发生不同程度损失的概率,较全面系统地对施工期的深水桩基工程进行了风险分析。

Risk analysis of large-diameter rock-socketed steel pipe pile in deep water during construction period

Based on the literature research, the method which integrates Monte Carlo simulation technique and finite element method was used to quantify the reliability of rock-socketed steel pipe pile during construction considering pile-soil interaction behavior and uncertainties in various variables. Uncertainties associated with horizontal foundation coefficients, rock-socketed length, section properties of the pile and load conditions were explicitly considered. Combining with the result of the reliability analysis, fuzzy theory was used to calculate the direct economic loss of pile during construction. The probability of pile loss of different degrees was obtained through calculation and a comprehensive and systematic risk analysis for the construction period of the deepwater pile foundation was carried out.