Combining with the immersed tunnel of Liujingyu River in Guangxi, the paper emphatically introduces the application of TSP method horizontal driller advanced sensor in immersed tunnel in karst geological condition.

In this paper,TSP203 plus system and exploitation water of advanced drilling are used to forecast the Karst crannies in right of the Qiyueshan Tunnel and to guide pre-drapery injected technique,which gains good results.

By adopting some technology of advanced detection,adding temporary invert,sleeve valve pipe and lock foot bolts,the construction of the tunnel is completed safely and successfully.

Sector detection technology was used to enhance the explanation accuracy of mine transient electromagnetic method in advanced detection instead of conventional survey.

The results show that advanced detection apparatus DTC-150 can detect geologic formation in front of the mine excavation 100 m away,and can more accurately detect faults,rock fissures,rock broken cinctures and water-rich situation,and the collection velocity can be used to classify the wall rock.

The portable mine detector,which is used to make advance detection of the front small structure of the mining faces by utilizing the diffracted wave,has become an effective auxiliary tool for the forecasting in the tunnelling.