护岸工程中浅水拖排受力分析与计算

Analysis and calculation of dragging the soft mattress in shallow water in bank-protection engineering

针对低水位下岸滩裸露高程较高,从岸上牵引施工软体排时受力机理尚不明确的问题,采用分段的方法,将软体排与外部环境之间的接触状态分为贴合、悬空和缠绕3种。在此基础上,推导了贴合状态下静力学模型计算式、悬空状态下悬链线模型计算式和缠绕状态下弧面摩擦模型计算式。分析计算了牵引软体排的最大牵引力,得出计算软体排受力的计算方法。该计算方法可供类似工况下计算软体排受力时参考分析,用于牵引软体排以进行施工方案设计和设备选择。

The bank above water is usually high at low water level,and the force state of dragging the soft mattress with concrete interlock blocks to the riverbank of high elevation has not been studied.Aiming at this problem,the contact state between the soft mattress and the external environment is divided into three types by using the method of segmentation:clinging,hanging,and enwinding.The calculation formula of the static model in the clinging state,the calculation formula of the catenary model in the hanging state,and the calculation formula of the cambered surface friction model in the enwinding state are derived.The maximum dragging force of the soft mattress is analyzed and calculated,and the calculation method is obtained.The method can be applied in the analysis of soft mattresses in similar conditions for project design and equipment selection.