一种关于楔形封堵体承载能力计算方法研究  

Study on the Calculation Method the Bearing Capacity of Wedge-shaped Plugging Body

作　　者：米云彤 张芳 秦晓亮 刘曜 MI Yuntong;ZHANG Fang;QIN Xiaoliang;LIU Yao(PowerChina Guiyang Engineering Corporation Limited,Guiyang Guizhou 550081)

机构地区：[1]中国电建集团贵阳勘测设计研究院有限公司,贵州贵阳550081

出　　处：《四川水力发电》2024年第4期121-124,共4页Sichuan Hydropower

摘　　要：导流洞作为水电工程中高水头的有压隧洞,其封堵措施是保证水电工程蓄水及正常运行的重要一环,其结构设计内容至关重要。目前关于封堵体的计算方法多针对于柱状封堵体,关于工程实用性较大及应用较多的楔形封堵体的计算方法较少。因此,基于规范推荐的柱状封堵体抗滑稳定计算公式,从楔形封堵体的受力分析出发,推导出适用于楔形封堵体承载力计算方法。将其计算结果与柱状封堵体计算结果对比,结果表明:相较于柱状封堵体,楔形封堵体更好地利用了围岩的特性,在泊松效应的加持下,极大程度地增强了封堵体对于水压的承载能力,该公式对于楔形封堵体的设计具有一定的参考作用。Diversion tunnel is a high-pressure tunnel with high water head in hydropower project.Its plugging measures are an important part to ensure water storage and normal operation of hydropower project,and its structural design is very important.At present,the calculation methods about plugging body are mainly aimed at cylindrical plugging body,and the calculation methods about wedge plugging body which is more practical and widely used in engineering are few.Based on the sliding stability calculation formula recommended by the code,this paper deduces the bearing capacity calculation method suitable for wedge-shaped plugging body from the force analysis.The calculated results are compared with those of cylindrical plugging body.The results show that,compared with cylindrical plugging body,wedge-shaped plugging body makes better use of the characteristics of surrounding rock,and greatly enhances the bearing capacity of the plugging body to the water pressure under the support of Poisson effect.The formula has a certain reference for the design of wedge-shaped plugging body.

关 键 词：导流洞 封堵体 楔形封堵体 抗滑稳定计算 

分 类 号：TV222[水利工程—水工结构工程]