摘要
本文以重庆地区某重力闸坝为实例,介绍了混凝土与建基岩体摩擦系数对重力坝抗滑稳定影响.。通过对坝基泥岩进一步的岩石力学试验证明了试验方法方法和试验条件的不同对软岩力学参数的影响是十分显著,在试验基础上考虑坝基岩体地质代表性和软岩的具体特点,将混凝土与泥岩的抗剪摩擦系数由0.42提高至0.55,用重力坝抗滑稳定分析软件对抗滑稳定计算分析较为敏感的摩擦系数f值进行了计算,结果安全系数大大提高。根据水工建筑物大坝设计相关规范要求,在不改变大坝使用功能条件下,对大坝结构进行了优化并采纳应用,节约工程投资20%左右。
This paper gives an example of a gate dam in Chongqing Area to introduce the effect of the sliding friction coefficient on gravity dam stability against sliding. Through carrying out further experiment of the dam foundation's mudstone,the significant effect of various test methods and conditions is proved. Considering the specific characteristics of soft rock and the dam foundation's geological representation which is based on the experiment,the friction coefficient is increased from 0.42 to 0.55. Carrying out a calculation with the software used to analyze gravity dam's anti-sliding stability,which results in the enhancement of safety coefficient. According to the demands corresponding to the requirement of the design codes,the project investment can be reduced by 20% while the function of the dam remains unchanged and the structure of dam is optimized.
出处
《地下空间与工程学报》
CSCD
北大核心
2015年第S2期514-517,共4页
Chinese Journal of Underground Space and Engineering
关键词
重力坝
岩石力学参数
抗滑稳定
优化
gravity dam
rock mechanical parameters
anti-sliding stability
optimization
