基于DMT的孟加拉国帕德玛大桥桩基承载力预测研究  

Prediction of Bearing Capacity of Pile Foundation of Padma Bridge in Bangladesh Based on DMT

作　　者：任士房 黎田[2] 涂文博 REN Shifang;LI Tian;TU Wenbo(CCCC Second Harbor Engineering Company Ltd.,Wuhan 430040,China;China Railway Major Bridge Reconnaissance&Design Institute Co.,Ltd.,Wuhan 430040,China;School of Transportation Engineering,East China Jiaotong University,Nanchang 330299,China;State Key Laboratory of Performance Monitoring and Protecting of Rail Transit Infrastructure,East China Jiaotong University,Nanchang 330299,China)

机构地区：[1]中交第二航务工程局有限公司,武汉430040 [2]中铁大桥勘测设计院集团有限公司,武汉430040 [3]华东交通大学交通运输工程学院,南昌330299 [4]华东交通大学轨道交通基础设施性能监测与保障国家重点实验室,南昌330299

出　　处：《路基工程》2025年第1期22-29,共8页Subgrade Engineering

基　　金：国家自然科学基金:复杂环境下沉井加基础水平动力特性及其长期演化规律研究(51808220)。

摘　　要：依托孟加拉国帕德玛多用途大桥,采用扁铲侧胀试验(Flat Dilatometer Test,简称DMT)分析大直径钢管桩基的竖向极限承载力,并与现场静力载荷试验和室内三轴试验的计算结果进行对比。结果表明:相对室内试验参数,基于3种不同DMT试验参数的计算结果误差均在10%以内,整体预测较可靠;魏晋攀方法的预测精度最高,Marchetti法次之,Campanella&Robertson法略低估了桩基的竖向极限承载力;桩端和桩侧压浆可有效提高桩基承载力,基于DMT测试的预测结果可为桩基压浆效果提供可靠经济的评估依据。Based on the Padma Multi-purpose Bridge in Bangladesh,the vertical ultimate bearing capacity of largediameter steel pipe pile foundation was analyzed through the Flat Dilatometer Test(DMT),and compared with the calculation results of field static load test and indoor triaxial test.The result shows that,the error of the calculation results based on the three different DMT test parameters is within 10%compared with the indoor test parameters,therefore,the overall prediction is reliable.The prediction accuracy of Wei-Jin-Pan method is the highest,followed by Marchetti method,and Campanella&Robertson method slightly underestimates the vertical ultimate bearing capacity of pile foundation.Grouting at pile tip and pile side can effectively improve the bearing capacity of pile foundation.The prediction results based on DMT test can provide a reliable and economic evaluation basis for the grouting effect of pile foundation.

关 键 词：扁铲侧胀试验 深厚粉细砂层 大直径钢管桩 原位测试 试验对比 桩基承载力 压浆效果 经济性 

分 类 号：TU473.1[建筑科学—结构工程]