某水闸左岸挡土墙开裂原因分析及处理措施

Causes Analysis and Treatment Measures of a Sluice's Left Retaining Wall Cracked

根据现场调查和位移监测资料,分析了导致水闸挡土墙开裂的可能原因,并通过极限平衡法计算分析得出挡土墙开裂的最可能原因为挡土墙外侧存在较高边坡,汇水面积较大,当遇强降水或连续降水时,从上部边坡下渗的地下水会导致墙后水位增高,水土压力增大,从而导致挡土墙发生滑移或错动。针对挡土墙现状,对常用的挡土墙加固方案进行比选,提出了采用旋喷桩+微型钢管桩+锚杆的方案进行加固处理,可为类似工程提供参考。

According to the field investigation and displacement monitoring data, the possible cracked causes of the sluice wall have been analyzed, and by using the limit equilibrium method, it is known that the most likely reason for retaining wall cracked is higher outside slope. The catchment area is large, when heavy rainfall or continuous precipitation falls, the water level after the wall will increase causing by the seepage from upper slope, and the water pressure increases, resulting in retaining wall sliding or dislocation. In view of the current situation of retaining wall, compared with the common reinforcement schemes of retaining wall, broach the measure of jet grouting pile and micro steel pipe pile and bolt is proposed to strengthen the wall, which provides a reference for similar projects.