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(上接2013年第2期第69页)3不良地质及对策常见的不良地层主要有块状岩体、挤压地层及高水压地层等。3.1块状岩体与对策由于岩体结构的不稳定性和破坏性压力的综合作用,导致岩体的快速分解、岩块脱离、岩端和岩面间发生弯曲变形,进而形成块状岩体。块状岩(图6)对TBM掘进的影响主要为:对刀具造成高频率大幅度震动;刀具刀盘与堵塞的块状岩之间发生激烈撞击;对刀盘产生非正常震动;刀具和轴
(Continued on page 69 in 2013 No. 69) 3 Bad Geology and Countermeasures The common bad strata are mainly massive rock mass, extrusion strata and high hydraulic formations. 3.1 Massive rock mass and its countermeasures Due to the combined effect of rock mass instability and destructive pressure, the rock mass rapidly decomposes and the rock mass disengages, bending deformation occurs between the rock mass and the rock mass, forming a massive rock mass. The main impact of the massive rock (Figure 6) on the TBM tunneling is that it causes a high frequency of substantial vibration to the tool, a violent collision between the cutter deck and the blocked block rock, an abnormal vibration to the deck,