关于半成岩内全直桩水平位移公式计算误差的探讨

摘要

One new jetty to accommodate 250000 DWT ore carriers was constructed in Mauritania,on a site where the geology features the cemented sand in the form of half rock,which can be easily broken by hand and scattered into grains after soaking in water,but is of overall relatively high strength. The berthing dolphins are independent structures on entirely vertical piles. The preliminary design works have been supported by calculations of the horizontal displacement of the vertical piles using finite element methods,such as M Method,P-Y curve method,Bloom method and ROBOT and ALGOR method. Taking into account the data from ensuing pile tests,the advantages and disadvantages of the calculation methods are summarized.%毛里塔尼亚新建25万t级矿石码头工程，工程地质条件较为特殊，基本为胶结类砂在形成岩石过程中的一种半成岩，该类岩石手可捏碎，浸水后，可捏成散粒状，但整体强度相对较高。工程靠船墩为分离结构且为全直桩。设计前期分别采用“m”法、P-Y曲线法、布鲁姆法以及ROBOT和ALGOR等有限元方法进行了水平位移计算，结合后期试桩资料，总结以上各种计算方法的优缺点。