摘要
在役高桩码头检测评估中桩身完整性是必测项目,根据现行水运行业标准一般采用低应变反射波法,抽检数量不少于桩总数的10%或20%,且不得少于10根,当检测发现缺陷桩时,应扩大桩的抽检比例。根据多年在役高桩码头安全检测评估、尤其是交通运输部开展码头靠泊能力核查和沿海港口码头结构加固改造工作中遇到的问题,通过现行水运工程和相关行业规范的对比分析,结合桩基完整性检测割桩损伤对码头水平承载力影响计算结果,探讨了桩基完整性检测抽样比例的合理性。提出在役高桩码头安全检测应以码头桩基施工质量合格为基础,以排除运行过程中产生的安全隐患为目的。安全检测时只需考虑在役高桩码头运行年限、靠泊方式、运行环境、异常靠泊率和结构型式等运行因素,选择较不利受力以及外观检查中桩基完整性存疑的桩基作为对象进行验证检测。
Pile foundation integrity is required to be tested in detection and evaluation of the high-piled wharf in service. According to the current water transport standard, the low strain reflection method was adopted, which demands the number of sampling piles shall not be less than 10% or 20% of the total number of piles and not be less than 10 piles. Besides, the sampling ratio should be expanded when the defects were detected. According to the multi-year safety evaluation of the high-piled wharf in service, especially the problems encountered in the verification of the wharf＇s berthing capacity and the reinforcement of the coastal wharf structure, the reasonableness of sampling ratio of pile integrity testing was discussed through the comparative analysis of the existing water transport standards, combined with the calculation results of the pile cutting damage effects on the horizontal bearing capacity. It is proposed that the safety detection of the high-piled wharf in service should be based on the qualification of construction quality of wharf pile foundation, so as to eliminate the potential safety hazards arising from the operation. According to the operational factors including operating ages, berthing methods, operating environment, abnormal berthing rate and structure type, piles which bear the worst load or are suspected to be incomplete should be selected as the object in verification testing.
出处
《水道港口》
2017年第3期269-273,共5页
Journal of Waterway and Harbor
基金
南京水利科学研究院中央级公益性科研院所基本科研业务费专项资金资助项目(Y415003)
关键词
在役高桩码头
桩基完整性
检测
评估
比例
high-piled wharf in service
pile foundation integrity
detection
evaluation
ratio
