钢板桩加固岸坡变形与桩土相互作用机理研究  

Deformation and pile-soil interaction mechanism of bank slopes reinforced by steel sheet piles

作　　者：张健 杨立功 张宇亭[1,2] 赵跃 刘勇军 吴文华 ZHANG Jian;YANG Ligong;ZHANG Yuting;ZHAO Yue;LIU Yongjun;WU Wenhua(Geotechnical Engineering Research Center,Tianjin Research Institute for Water Transport Engineering,Ministry of Transport,Tianjin 300456,China;National Engineering Research Center of Port Hydraulic Construction Technology,Tianjin Research Institute for Water Transport Engineering,Ministry of Transport,Tianjin 300456,China;Huzhou Port and Shipping Management Center,Huzhou 313000,China)

机构地区：[1]交通运输部天津水运工程科学研究院岩土工程研究中心,天津300456 [2]交通运输部天津水运工程科学研究院港口水工建筑技术国家工程研究中心,天津300456 [3]湖州市港航管理中心,浙江湖州313000

出　　处：《岩土工程学报》2024年第S01期202-206,共5页Chinese Journal of Geotechnical Engineering

基　　金：中央级公益性科研院所基本科研业务费专项资金项目(TKS20240401)。

摘　　要：针对航道开挖过程中护岸边坡板桩变形及桩土相互作用机制,通过选取典型断面进行现场试验的方法,对板桩结构位移、土压力及临近土体变形等关键物理量参数进行监测,并结合理论计算方法对板桩结构及后方岸坡土体稳定性进行了详细分析,探究了复杂地质条件下桩后土体变形与主动土压力的内在关联,得到了部分有益结论。板桩护岸后方边坡土体水平位移随开挖进行逐渐增加,边坡达到平衡状态时不同深度土体位移约为0.8~1 mm,板桩桩顶水平位移变化量约为1.2 mm。航道开挖过程中板桩主动侧土压力随开挖的进行逐渐减小,不同埋深位置桩侧土压力减小值约为1 kPa,与理论计算结果比较发现现场试验结果均较小,说明上述理论计算方法对于本试验结构形式而言土压力计算略偏保守。In view of the deformation of sheet piles and the pile-soil interaction mechanism of revetment slopes during channel excavation,the key physical parameters such as displacement of sheet piles,earth pressure and deformation of the adjacent soils are monitored by selecting typical sections for the field tests.Combined with the theoretical calculation,the stability of the sheet piles and the bank slope is analyzed,and the interaction mechanism between the soil deformation behind the piles and the active earth pressure with complex geological conditions is explored,and some useful conclusions are drawn.The horizontal displacement of the soils behind the sheet piles increases gradually with the excavation.When the slope reaches stability,the soil displacement at different depths is about 0.8~1 mm,and the horizontal displacement at the top of the sheet piles is about 1.2 mm.During channel excavation,the active earth pressure of the sheet piles gradually decreases with the excavation,and the reduction value of the earth pressure at pile side at different depths is about 1 kPa.Compared with the theoretical results,the field test results are small,indicating that the theoretical calculation is slightly conservative for the field tests.The conclusion can provide a useful reference for the revision of the existing related specifications for the sheet piles.

关 键 词：钢板桩 岸坡加固 现场试验 土体位移 桩土相互作用 

分 类 号：TU432[建筑科学—岩土工程]