摘要
根据火谷混凝土坝基岩声波波速与地质强度指标GSI建立的关系式,采用材料力学法计算建基面基岩的实际最小主应力,应用Hoek-Brown准则确定灌浆前建基面基岩的抗剪断强度参数,并基于室内试验所给出的抗剪断参数建议值,分别运用抗滑稳定公式计算建基面基岩的抗滑稳定安全系数。结果表明,该方法对应的抗滑稳定安全系数与建议参数对应值较为吻合。继而用声波波速计算灌浆后基岩的抗剪断强度参数,发现其抗滑稳定安全系数较建议参数对应值有所提高。
According to the relationship between bedrock acoustic wave velocity and geological strength index GSI of Huogu concrete dam,the actual minimum principal stress of bedrock on foundation surface was calculated by mechanics of materials.Based on the recommended values of shear parameters given by laboratory tests and the values obtained by Hoek-Brown criterion,the anti-slide stability safety factor of bedrock on the foundation surface is calculated by using the anti-slide stability formula.The results show that the safety factor of anti-slide stability corresponding to the method is consistent with the corresponding value of the recommended parameters.Then the shear strength parameters of bedrock after grouting were calculated by acoustic wave velocity,and the safety factor of anti-slide stability is higher than the corresponding value of recommended parameters.
作者
应政勋
陈新
张菁菁
YING Zheng-xun;CHEN Xin;ZHANG Jing-jing(College of Water Resource and Hydropower,Sichuan University,Chengdu 610065,China)
出处
《水电能源科学》
北大核心
2021年第10期102-105,203,共5页
Water Resources and Power
基金
水资源高效开发利用重点专项(2018YFC0406803)。
关键词
固结灌浆
建基面基岩
抗剪断强度参数
抗滑稳定安全系数
HOEK-BROWN准则
声波波速
consolidation grouting
bedrock of foundation surface
shear strength parameter
safety factor of antislide stability
Hoek-Brown criterion
acoustic wave velocity
