先张法预应力U形板桩在大湾区内河航道堤岸挡墙中的应用  

Application of tension prestressed U-shaped plate pile in embankment retaining wall of river channel embankment in China Great Bay Area

作　　者：徐立强 戴维[1] 王逢武 田广宇 XU Li-qiang;DAI Wei;WANG Feng-wu;TIAN Guang-yu(Beijing Municipal Engineering Design and Research Institute Co.,Ltd.,Beijing 100082,China;Harbin Institute of Technology,Shenzhen 518000,China;CCCC Water Transportation Consultants Co.,Ltd.,Beijing 100007,China)

机构地区：[1]北京市市政工程设计研究总院有限公司,北京100082 [2]哈尔滨工业大学,广东深圳518055 [3]中交水运规划设计院有限公司,北京100007

出　　处：《水运工程》2022年第11期165-171,共7页Port & Waterway Engineering

基　　金：广东省基础与应用基础研究基金项目(2020B1515120083)。

摘　　要：以大湾区东莞内河航道万江堤岸挡墙工程为例,介绍了先张法预应力U形板桩作为堤岸挡墙的工程应用。首先,通过方案比选得出,U形板桩方案具有施工速度快、对河道影响小且工程造价低的优点。然后,通过理论计算分析得出了U形板桩作为悬臂支挡结构的最大适用高度。最后,对水平位移产生的因素进行分析,并提出预设位移、事先进行墙后地基加固的措施减少水平位移。现场实测数据表明,水平变形主要产生在前45 d,后期变形较小。挡墙工程运营数据显示适用情况良好,可为类似内河航道工程提供参考。Taking Wanjiang embankment retaining wall project of Dongguan inland waterway in China Great Bay Area as an example, this paper introduces the engineering application of prestressed U-shaped sheet pile as embankment retaining wall. Firstly, the scheme comparison shows that the U-shaped sheet pile scheme has the advantages of fast construction speed, little influence on the river and low project cost. Then, the maximum applicable height of U-shaped sheet pile as cantilever retaining structure is obtained through theoretical calculation and analysis. Finally, the factors of horizontal displacement are analyzed, and the measures of presetting displacement and reinforcing the foundation behind the wall in advance are put forward to reduce the horizontal displacement. The field measured data show that the horizontal deformation mainly occurs in the first 45 days, and the later deformation is small. The operation data of retaining wall project show that the application is good, which can provide reference for similar inland waterway projects.

关 键 词：U形板桩 水平位移 等效代换 堤岸挡墙 

分 类 号：U617.8[交通运输工程—船舶及航道工程]