基于近海钢管桩现场试验的海洋土参数反演

Numerical inversion study on comprehensive capacity of marine steel pipe pile based on field pile loading tests

受海洋环境等方面的影响,海洋土层参数的确定比较困难,常需钻探取样试验、原位测试并结合桩基现场静载试验进行综合分析。基于海洋钢管桩现场静载试验,探讨了海洋土层参数取值对不同受荷情况下钢管桩应力与变形的敏感程度,并对关键参数开展了一系列数值仿真反分析,通过与海洋钢管桩在现场水平加载、竖向抗压和竖向抗拔等静载试验下的实测结果进行对比,综合室内试验和API等海洋工程规范的经验取值,对钢管桩在多种受荷条件下的土层参数取值进行了论证。

It is difficult to determin the parameters of the marine soil due to the influence of the marine environment.There is often a need to combine drill sampling, in situ tests with field static load tests on the pile foundation for comprehensive analysis. Based on the static load test of marine steel pipe pile,the sensitivity of the parameters of the marine soil to the stress and deformation of the steel pipe pile under different loads was discussed.Moreover, a series of numerical simulations were carried out to analyze the key parameters.By comparing with the static load test results, including the horizontal, vertical compression and vertical uplift tests,the experience of the laboratory test and the marine engineering standards (e.g. API),the parameters of the marine soil layer were demonstrated under the various load conditions of the steel pipe pile.