已浇筑碾压混凝土及裂缝对碾压混凝土重力坝的安全性影响研究  

Study on the Influence of Poured Roller Compacted Concrete and Cracks on the Safety of Roller Compacted Concrete Gravity Dam

作　　者：伍世朝 WU Shi-chao(Sinohydro 3rd Engineering Bureau Co.Ltd.,Xi'an 710024,China)

机构地区：[1]中国水利水电第三工程局有限公司,西安710024

出　　处：《水利科技与经济》2023年第11期24-29,共6页Water Conservancy Science and Technology and Economy

摘　　要：为了研究碾压混凝土(Roller compacted concrete,RCC)重力坝的碾压混凝土层厚度与结构裂缝对重力坝的安全性影响,以国内某RCC重力坝为例,构建并分析其静力有限元模型和裂缝发展有限元模型。结果显示,重力坝坝踵部位局部应力较高,且在超载系数处于2.50左右时,易发生整体破坏。仿真分析结果表明,大坝裂纹发展过程具有破坏突然性。在实际施工中,可通过增加碾压层厚度、加强裂缝检测以及加固补强等方式,提高RCC重力坝的安全性和使用寿命。In order to study the impact of roller compacted concrete(RCC)gravity dam thickness and structural cracks on the safety of the gravity dam,the static finite element model and crack development finite element model of a domestic RCC gravity dam are constructed and analyzed in this study.The analysis results show that the local stress at the heel of gravity dam is high.And when the overload coefficient is about 2.50,the overall failure is easy to occur.The simulation analysis results show that the dam crack development process has a sudden destruction.In actual construction,the safety and service life of RCC gravity dam can be improved by increasing the thickness of rolling layer,strengthening crack detection and reinforcement.

关 键 词：碾压混凝土 重力坝 裂缝 安全性 坝踵 

分 类 号：TV642.3[水利工程—水利水电工程]