除险加固前后土石坝坝体渗流及坝坡稳定性分析  

Analysis of Seepage and Slope Stability of Earth Rock Dam before and after Reinforcement

作　　者：袁旭琦 卢士亮 许超 YUAN Xu-qi;LU Shi-liang;XU Chao(Jiangsu Water Conservancy Engineering Science and Technology Consulting Co.Ltd.,Nanjing 210029,China)

机构地区：[1]江苏省水利工程科技咨询股份有限公司,南京210029

出　　处：《水利科技与经济》2023年第1期18-23,共6页Water Conservancy Science and Technology and Economy

摘　　要：土石坝是水库大坝的主要形式,由于长期以来的维护不足,造成渗漏现象频发,安全问题日益严重。在分析坝体渗流特点及计算方法的基础上,以南京某拦河水库为例,通过Geo-Studio有限元软件,对该水库除险加固前后坝体渗流稳定性加以评价。结果表明,在除险加固后,坝体稳定安全系数的平均值为3.305,渗流量下降超过2×10^(-4)m^(3)/s,符合国家水利工程规范要求,说明除险加固在提高其安全性方面具有一定的促进作用,以期为水库运营管理提供参考。Earth rock dam is the main form of reservoir dam. Due to the lack of maintenance for a long time, leakage occurs frequently, and safety problems are becoming increasingly serious. On the basis of analyzing the seepage characteristics and calculation methods of the dam body, taking a river blocking reservoir in Nanjing as an example, the seepage stability of the dam body before and after the reinforcement of the reservoir was evaluated by using the Geo-Studio finite element software. The results show that the average value of the stability safety coefficient of the dam body is 3.305, and the seepage flow decreases by more than 2×10^(-4)m^(3)/s,in line with the requirements of the national water conservancy project specifications, indicating that the danger removal and reinforcement have a certain role in promoting its safety, providing a reference for the operation and management of the reservoir.

关 键 词：土石坝 除险加固 渗流 坝坡稳定性 

分 类 号：TV223.4[水利工程—水工结构工程]