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八十年代中期,福朗克公司研制出一套动测桩系统。分析方法是建立在修正了桩一土相互作用规律的史密斯计算模型的基础上。后来卢旺夫主教大学土木工程实验室和福朗克公司协作开展了进一步的研究。现在,在软硬件和理论方法方面都有重大改进。利用试验装置获得数据(应变、加速度或速度),通过试凑法确定桩周土层的性质。使用合适的计算模型还可以计算静载条件下桩的性能。本文先进行理论方面的分析,然后讨论桩顶应力的重新分配。根据两个工地的螺旋型阿特拉斯桩所进行的动、静荷载试验,详细地分析了所开发的硬件和软件的可靠性。
In the mid-1980s, Planck developed a dynamic pile system. The analysis method is based on the Smith calculation model that corrects the pile-soil interaction law. Bishop Lunoff University’s Civil Engineering Laboratory and the Franken Company later conducted further research. Now, there are major improvements in hardware, software, and theoretical methods. The data (strain, acceleration, or velocity) was obtained using the test device, and the properties of the soil layer around the pile were determined by trial and error. The performance of the pile under static conditions can also be calculated using a suitable calculation model. This paper first analyzes the theory and then discusses the redistribution of stress at the pile top. According to the dynamic and static load tests conducted on the spiral Atlas piles at two sites, the reliability of the developed hardware and software was analyzed in detail.