英美规范打入桩承载力计算方法对比分析  

Comparative Analysis of Calculation Methods for Driven Pile Bearing Capacity Specified in British and US Codes

作　　者：王幸 娄学谦[1] 胡兴昊[1] Wang Xing;Lou Xueqian;Hu Xinghao(CCCC Fourth Harbor Engineering Institute Co.,Ltd.,Guangzhou Guangdong 510230,China)

机构地区：[1]中交四航工程研究院有限公司,广东广州510230

出　　处：《港工技术》2023年第2期49-53,共5页Port Engineering Technology

摘　　要：介绍国际港口工程中最常用的英美桩基承载力计算方法,对比英美规范中桩基承载力计算的异同,为类似工程的桩基承载力计算提供选择规范和计算参数的依据。通过承载力计算以及与实际工程的静载试验结果进行对比。结果发现:美标计算结果略小于英标计算结果,英美标的计算结果均小于静载试验结果。通过对计算参数的分析可以得到以下结论:1)当持力层为密实砂土或者持力层为粘性土但入土较深时,英标的计算端阻力将大于美标;2)英标的桩侧土压力系数调整更灵活,可根据静载试验结果调整;3)美标的安全系数比英标小,相同的桩基承载力时,美标允许的设计承载力将更高。The calculation methods for pile bearing capacity in British&US codes are widely used in international ports.The calculation methods are compared to each other,which serves as basis for the selection of codes and calculating parameters in similar projects.By comparing the bearing capacity calculation results with static load test results in actual project,it is found that the calculation result by using US code is smaller than that by British code,both of them are smaller than the static load test result.The analysis of calculation parameters leads to the following conclusions:1)The pile end resistance in British code is larger than that in US code subject to dense sandy soil or cohesive soil serving as bearing stratum,and the pile is driven into the stratum deeply;2)The coefficient of soil pressure against pile side can be flexibly adjusted in British code,for instance,be adjusted according to the static load test result;3)The safety coefficient in US code is smaller than that in British code.Higher design bearing capacity is allowed in US code subject to same pile bearing capacity.

关 键 词：英美规范 港口工程 打入桩 桩基承载力 安全系数 

分 类 号：TU473[建筑科学—结构工程]