巴基斯坦卡洛特水电站大坝帷幕灌浆抬动控制分析

Analysis of uplift control during curtain grouting of Karot Hydropower Station

为控制巴基斯坦卡洛特水电站大坝帷幕灌浆过程中发生的频繁抬动,从基岩特性、设计参数和施工工艺等方面分析了缓倾角软岩互层地质特征下帷幕灌浆抬动的影响因素,并有针对性地采取了控制措施。结果表明:地质因素、灌浆压力因素、盖重因素、灌浆方法、观测方案、人为因素是发生帷幕灌浆抬动的影响因素。压水试验表明,幕体施工满足设计要求,基岩裂隙得到有效充填。

In order to avoid frequent uplift during curtain grouting of Karot Hydropower Station in Pakistan,we ana⁃lyzed the influence factors of uplifting during curtain grouting in the light of the geological characteristics of inter⁃bedded soft rock with slow dip angle from the aspects of bedrock characteristics,design parameters,construction technologies.Also,some corresponding uplift control measures were taken.The results showed that the uplift during curtain grouting was influenced by geological factors,grouting pressure,cover weight,grouting methods,observation schemes and human factors.The packer test proved that the curtain construction met the design requirements and bedrock cracks were effectively filled.