内河航道板桩-浆砌块石结构共同护岸机理研究  

Bank protection mechanism of sheet pile-grouting block stone structure in inland waterways

作　　者：杨立功 张宇亭[1,2] 李建东 赵跃 吴文华 YANG Ligong;ZHANG Yuting;LI Jiandong;ZHAO Yue;WU Wenhua(Tianjin Research Institute for Water Transport Engineering,M.O.T.,Tianjin 300456,China;National Engineering Research Center of Port Hydraulic Construction Technology,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,天津300456 [2]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222-227,共6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：在内河高等级航道建设中,新建板桩-原有浆砌块石共同护岸成为一种新型的护岸结构。通过对该护岸结构的离心模型试验研究,分析了板桩与原有结构之间无连接(J1)、刚性连接(J2)时,原有护岸结构位移、板桩桩侧土压力及桩身弯矩。试验结果表明,刚性连接时,原有结构后倾、下沉位移远小于无连接情况,板桩稳定性大幅度提升;开挖过程中J1,J2条件下板桩除了产生平移位移、还有转动位移,J1以转动为主,J2以平移为主;受U型板桩形状影响,开挖过程中板桩两侧土体形成土拱,同一深度不同位置板桩土压力有较大区别,土压力变化也有较大差异;开挖过程中,J2条件下桩身范围内土压力变化较一致,J1条件下随桩身深度增加,桩侧土压力变化幅度增加;J1条件下最大弯矩位于桩身下部、J2条件下位于桩身上部,且J2最大弯矩大于J1最大弯矩。During the construction of high-grade channels in inland rivers,the new sheet piles and the original mortar block stone joint revetment have become a new revetment structure.The displacement of the original bank protection structures and the side earth pressure and the bending moment of the sheet piles are analyzed when there is no connection(J1)or rigid connection(J2)between the sheet piles and the original structures.The test results show that when the original structures are rigidly connected,the backward tilt and subsidence displacement are much smaller than those without connection,and the stability of the sheet piles is greatly improved.In the process of excavation under J1 and J2 conditions,there are translational and rotational displacements,while J1 is dominated by rotation,and J2 is dominated by translation.Influenced by the shape of the U-shaped sheet piles,soil arching is formed at both sides of the sheet piles during excavation,and the soil pressures on the sheet piles vary greatly at different positions at the same depth.In the process of excavation,the changes of the soil pressures in the range of the piles under J2 condition are consistent,and the variation range of the soil pressures at pile side increases with the increase of the pile depth under J1 condition.Under J1 condition,the maximum bending moment is located at the lower part of the piles,and under J2 condition,the maximum bending moment of J2 is greater than that of J1.

关 键 词：板桩 浆砌块石 护岸 土压力 土拱效应 离心模型试验 

分 类 号：TU43[建筑科学—岩土工程]