电阻率超前探测监测隧道冷冻法施工效果的可行性分析

Feasibility of Monitoring Soil-Freezing Consolidation Using DC Resistivity Advanced Detection in Tunnel

采用有限单元法对隧道电阻率超前探测进行数值模拟,研究冷冻法施工前后,地下水变化导致的电阻率超前探测视电阻率改变。冷冻法未完成时,超前探测视电阻率为低阻异常;冷冻法完成后,超前探测视电阻率为高阻异常。结果表明,电阻率超前探测可以准确监测隧道冷冻法的施工效果。

The numerical modeling of DC resistivity advanced detection in tunnel based on finite element method is done in this paper to study the feasibility of monitoring on soil-freezing consolidation.The change of apparent resistivity caused by the change of groundwater in soil-freezing consolidation is obvious.The anomalous of apparent resistivity in advanced detection is low-resistivity before the groundwater is full frozen.The anomalous of apparent resistivity in advanced detection is high-resistivity after the groundwater is full frozen.It shows that the effect of soil-freezing consolidation can be monitored by DC resistivity advanced detection in tunnel.