中文摘要：

依托在建的青海省德香高速公路盐沼泽区的桥梁工程,以MARC有限元软件为平台,采用室内腐蚀试验参数,构建盐沼泽区桥梁桩基受腐蚀有限元模型,分析不同桩长和桩径的情况下,桩基受腐蚀后的剥落厚度和腐蚀深度对桩基竖向极限承载力的影响。研究结果表明,桩基受腐蚀后其竖向极限承载力呈现降低趋势,相比桩基混凝土剥落厚度来说,桩基受腐蚀的深度对桩基竖向极限承载力的影响较大。研究结果还表明,剥落厚度不大于6cm时,增加桩长能够有效提高桩基竖向极限承载力;剥落厚度大于6cm时,增加桩径能够有效提高桩基竖向极限承载力。

英文摘要：

Based on the bridge engineering on the Delingha-Xiangride Highway which are built in salt marshes in Qinghai, the finite element model of the corrosion of highway bridge pile foundation in salt marshes is established by using the finite element analytical software MARC and the parameters provided by the indoor test, influences of the flaking thickness and corrosion depth after corrosion on the vertical ultimate bearing capacity of pile foundation were analyzed for different pile length and pile diameter. The results show that the ultimate bearing capacity appear a trend of decrease for the pile foundation of the corrosion, compared with the flaking thickness of pile foundation, the depth of the pile corrosion have more influences on the ultimate bearing capacity of pile foundation. The results also shows that the vertical ultimate bearing capacity of pile foundation could be improved effectively by increasing pile length, as the flaking thickness is no more than 6cm. Besides, the vertical ultimate bearing capacity of pile foundation could be improved effectively by increasing pile diameter, as flaking thickness greater than 6 cm.