水力作用下钢管桩围堰受力变形现场试研究

On Site Test Study on the Deformation of Steel Sheet Pile Cofferdam under Hydraulic Action

文中为预测大桥施工过程中钢管桩围堰变形情况,及时做好预防措施,对现场施工进行监测,并安装监测点,通过对桩顶水平位移、桩身水平位移以及桩身应力情况进行研究分析,得出钢管桩围堰受力位移情况。结果表明,桩顶水平位移情况随着施工时间的变化呈先往围堰外侧水平位移,后往围堰内侧,最后往围堰外侧位移;当河流湍急时,桩身总体向围堰内侧方向变形;桩身悬臂段应力最大值均出现在桩身下方,且与桩身深度成正比。

In order to predict the deformation of steel pipe pile cofferdam in the construction process of the bridge,the preventive measures are taken to monitor the site construction and install monitoring points.Through the horizontal displacement of pile top,pile body horizontal displacement and pile body stress,the force displacement of steel pipe pile cofferdam is analyzed.The results show that the horizontal displacement of the pile top moves to the outside of the cofferdam with the change of the construction time,and the maximum stress of the outside of the cofferdam is proportional to the depth of the pile body.