陆水水利枢纽主坝闸墩下游侧上部斜向裂缝成因分析及处理方案

为对陆水水利枢纽主坝闸墩下游侧上部斜向裂缝成因进行分析并提出有效的处理方案,应用ABAQUS有限元分析软件,通过建立主坝 5^#闸墩下游侧包含溢流面、闸墩及其上部启闭机房排架柱的三维模型,采用ABAQUS有限元软件进行了温度场应力分析计算,找出了日照温度作用是导致闸墩裂缝的主要原因之一;并有针对性地制定闸墩裂缝处理方案,采取了预应力锚固、植筋、裂缝化学灌浆等应急处理措施,使得裂缝得到有效控制。研究成果可为类似工程缺陷处理提供参考。

Causes and Treatments of Upper Diagonal Cracks at the Downstream Side of Main Dam Pier of Lushui Hydropower Complex

The causes of the upper diagonal cracks at the downstream side of the main dam pier of Lushui Hydropower Complex are analyzed using finite element method with ABAQUS. By establishing a 3D model of the downstream side of the main dam 5^# pier, including the spillway surface, the pier and the foundation of hoist bents on the pier, the thermal stress was analyzed using ABAQUS. The action of solar temperature is a major cause of the cracks. In addition, a crack treatment scheme for the pier was developed, and emergency measures such as prestressed anchoring, planting reinforcement, and chemical grouting were adopted to effectively control the cracks. The research offers a reference for the treatment of similar engineering defects.