摘要
目前岩溶注浆效果检测缺乏定量评价方法和标准。利用数理统计方法引入视电阻率平均变化率Δρ_(s)定量评价公式,将岩溶注浆效果检测评定问题定量化;结果分析了3种典型地质条件下电测深法岩溶注浆效果检测实例,再利用瞬态面波法和钻孔压水试验结果加以佐证;最后结合大量实测案例,给出采用视电阻率平均变化率指标和定量评价标准,并利用统计分析验证了定量评价标准的合理性。研究结果表明,当视电阻率平均变化率Δρ_(s)≥15%时,可直接判定注浆效果为合格;当Δρ_(s)<15%时,注浆效果为“不明显”,需结合其他物探方法和钻孔压水试验结果进一步进行综合评定。
At present,the detection of Karst grouting effect lacks quantitative evaluation methods and standards.The average change rate of apparent resistivityΔρ_(s)was introduced by mathematical statistical method.The quantitative evaluation formula quantified the detection and evaluation of Karst grouting effect.Three examples of Karst grouting effect detection by resistivity sounding method under three typical geological conditions were analyzed,and the results were verified by transient surface wave method and borehole water pressure test.Finally,combined with a large number of measured cases,the index of the average change rate of apparent resistivity and the quantitative evaluation standard were given,and the rationality of the quantitative evaluation standard was verified by statistical analysis.The results show that,whenΔρ_(s)≥15%,the grouting effect can be directly determined as qualified;WhenΔρ_(s)<15%,the grouting effect is“not obvious”,which needs to be further comprehensively evaluated in combination with other geophysical prospecting methods and borehole water pressure test results.
作者
王乾龙
何明峰
邓瑞
季凇达
Wang Qianlong;He Mingfeng;Deng Rui;Ji Songda(China Railway Design Corporation,Tianjin 300308,China)
出处
《铁道勘察》
2022年第6期89-95,共7页
Railway Investigation and Surveying
基金
中国铁路设计集团有限公司科技开发项目重点课题(2019YY320113)
关键词
高速铁路
岩溶
电测深法
定量评定法
工程质量
high-speed railway
Karst
resistivity sounding method
quantitative evaluation methed
construction quality
作者简介
王乾龙(1994—),男,2017年毕业于吉林大学地球探测与信息技术专业,工学硕士,工程师,E-mail:1435853606@qq.com。
