基于电法正演的穿堤管道注浆效果测试研究  

Research on Grouting Effect Test of Dike-crossing Pipeline Based on Electrical Forward Modeling

作　　者：蒋真真 余金煌 康小方 段超 刘金杰 张贺贺 Jiang Zhenzhen;Yu Jinhuang;Kang Xiaofang;Duan Chao;Liu Jinjie;Zhang Hehe(School of Civil Engineering,Anhui Jianzhu University,Hefei,Anhui 230601,China)

机构地区：[1]安徽建筑大学土木工程学院,安徽合肥230601

出　　处：《黑龙江工业学院学报（综合版）》2022年第12期78-85,共8页Journal of Heilongjiang University of Technology(Comprehensive Edition)

基　　金：安徽省自然科学基金资助项目(项目编号:2008085QE245);安徽省高校省级自然科学研究项目-重点项目(项目编号:KJ2019A0747)。

摘　　要：研究利用高密度电法测试顶管穿堤后可能在管道周边产生渗漏通道而采用压密注浆补强的效果。研究过程中建立了地电模型,利用有限差分法模拟不同装置类型及电极距的测试效果。根据正演模拟结果,偶极装置对垂向电性差异的地质体反应灵敏,分辨率高,但对水平变化相对不灵敏,抗干扰能力弱。温纳装置在水平方向上对于电性的变化反应灵敏,对于垂向电性变化则相对迟钝,探测深度更深,抗干扰能力强,观测到的信号更强,可在噪声较大的环境下使用。根据正演模拟成果进行了现场测试验证及反演分析。研究表明,利用高密度电法测试顶管穿堤后压密注浆处理效果时采用温纳装置,电极距为2m时测试效果较好,能满足压密注浆效果的评价要求。The effect of compaction grouting reinforcement is studied by high-density electrical method to test the possible leakage channel around the pipeline after pipe jacking.In the process of research,the geoelectric model is established and the finite difference method is used to simulate the test results of different device types and electrode distances.According to the forward simulation results,the dipole device is sensitive to geological bodies with vertical electrical differences and has high resolution,but it is relatively insensitive to horizontal changes and has weak anti-interference ability.The wenner device is sensitive to electrical changes in the horizontal direction,and is relatively insensitive to vertical electrical changes.The detection depth is deeper and the anti-interference ability is strong.The signal observed by the wenner device is stronger and can be used in places with large geological noise.According to the forward simulation results,field test verification and inversion analysis are carried out.The research shows that the wenner device is used when the high density electrical method is used to test the effect of compaction grouting after the pipe jacking passes through the embankment,and the test effect is better when the electrode spacing is 2m,which can meet the evaluation requirements of compaction grouting effect.

关 键 词：高密度电法 正反演 温纳装置 偶极装置 压密注浆 

分 类 号：TV698.2[水利工程—水利水电工程] TV871.4