护底软体排破坏机理及应对措施
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摘要
软体排边缘床面易受不利水流冲刷下切,当冲刷下切强度超过排体变形能力时,软体排排边会出现变形破坏。分析了护底软体排变形破坏的主要影响因素:水流条件、河床组成、软体排自身结构、余排宽度及施工工艺等。探讨了护底软体排破坏的力学机理。提出在排边一定范围内抛投一定密度的扭双工字型透水框架,能削减排边近底层的流速及紊动强度进而减弱或抑制排边冲刷,从而维持软体排结构安全及坝体稳定的应对措施。
The bed in the edge of soft mattress is easy to be scoured by unfavorable flow. When the scouring depth exceeds the deformation capacity of soft mattress,the edge of it sometimes appears deformation failure. The paper analyzes the influential factors of the deformation failure of soft mattress,which includes the flow conditions,bed composition,as well as the structure and width of soft mattress. The failure mechanism of soft mattress is also studied and corresponding counter measures are proposed. It indicates that a permeable frame of certain density can reduce the turbulent intensity near the bottom boundary flow and the bed scouring in the edge of soft mattress,which can maintain the safety of soft mattress and spur dike.
The bed in the edge of soft mattress is easy to be scoured by unfavorable flow. When the scouring depth exceeds the deformation capacity of soft mattress,the edge of it sometimes appears deformation failure. The paper analyzes the influential factors of the deformation failure of soft mattress,which includes the flow conditions,bed composition,as well as the structure and width of soft mattress. The failure mechanism of soft mattress is also studied and corresponding counter measures are proposed. It indicates that a permeable frame of certain density can reduce the turbulent intensity near the bottom boundary flow and the bed scouring in the edge of soft mattress,which can maintain the safety of soft mattress and spur dike.
引文
[1]张群.软体排顺水流施工受力分析与实船测试研究[J].武汉理工大学学报:交通科学与工程版,2014,38(3):619-622.
[2]张秀芳,王平义,王伟峰,等.软体排护滩带的护滩效果研究[J].水运工程,2010(12):98-103.
[3]曹根祥,丁捍东.长江口深水航道治理工程护底软体排施工成套工艺及设备的开发[J].水运工程,2006(12):68-73.
[4]董朝明,王兴超,林垂兴,等.软体排缩排原因分析及控制[J].中国港湾建设,2014(9):24-28.
[5]刘颖,杨平.软体排沉排受力分析与非线性有限元计算[J].船海工程,2011(3):52-55.
[6]朱宪武.混凝土联锁块软体排的受力分析与计算[J].水运工程,2000(12):21-26.
[7]张为,李义天.系混凝土块压载体软体排受力特性研究[J].水运工程,2006(1):9-15.
[8]吴腾,徐金环,陶桂兰,等.贺江下游航道优化开发等级研究[J].水运工程,2014(4):106-110.
[9]付中敏.潮汐河段消能护滩结构(透水框架)研究[R].武汉:长江航道规划设计研究院,2013.
[2]张秀芳,王平义,王伟峰,等.软体排护滩带的护滩效果研究[J].水运工程,2010(12):98-103.
[3]曹根祥,丁捍东.长江口深水航道治理工程护底软体排施工成套工艺及设备的开发[J].水运工程,2006(12):68-73.
[4]董朝明,王兴超,林垂兴,等.软体排缩排原因分析及控制[J].中国港湾建设,2014(9):24-28.
[5]刘颖,杨平.软体排沉排受力分析与非线性有限元计算[J].船海工程,2011(3):52-55.
[6]朱宪武.混凝土联锁块软体排的受力分析与计算[J].水运工程,2000(12):21-26.
[7]张为,李义天.系混凝土块压载体软体排受力特性研究[J].水运工程,2006(1):9-15.
[8]吴腾,徐金环,陶桂兰,等.贺江下游航道优化开发等级研究[J].水运工程,2014(4):106-110.
[9]付中敏.潮汐河段消能护滩结构(透水框架)研究[R].武汉:长江航道规划设计研究院,2013.