HORIZONTAL SOUND PROBING(HSP) GEOLOGY PREDICTION METHOD APPROPRIATED TO TBM CONSTRUCTION

According to the situation that general tunnel geology prediction methods were used to TBM wery difficult, combined with the advantages and disadvantages of other methods to TBM construction, and with their application, the study on effective HSP geology prediction technology was developed to fit for TBM construction. the signal of TBM boring machine cutters cutting rocks was used as the Excitation signal of HSP Acoustic Reflection Geological Prediction. Also several geology prediction field tests were done. Practice proved that it was successful in Dahuofang hydraulic tunnel project by using the technology geology prediction for TBM construction. The geology prediction of TBM construction was carried out under the conditions without the TBM stop-waiting, which was positive to guiding TBM construction.