贵阳地铁一号线第四工作段区间隧道穿越岩溶发育地区,地质条件复杂,易导致地铁区间建设过程中出现涌水涌泥等地质灾害,造成施工安全隐患。为此,基于工程地质分析与超前地质物探方法,将洞内外地质灾害预警方法充分利用在地铁隧道地质灾害预警中,成功预报了地铁隧道前方掌子面可能存在的岩溶地质灾害,并通过开挖检验了预报的准确性,通过验证可知,地质雷达是一种准确度较高的无损短程超前地质预报方法,在岩溶地区可以较好的预报前方含水体,可以为施工单位提供较准确的参考。进一步通过对比论证地质预报结果,从工程地质学的角度分析了岩溶地质灾害产生的原因和影响因素,并为物探指定重点注意区域。为类似工程岩溶地质灾害预警与成因分析,提供了参考方法和理论依据。
The tunnel of the fourth section in Guiyang Subway Line One travels through karst developing regions,the surrounding geological condition is quite complex and may easily bring about water or mud gushing disaters,threatening the safety of the construction For this reason,based on the engineering geological analysis and advanced geophysical methods,the geological disaster prediction method was fully applied to the prediction of the disasters inside and outside of the subway tunnel. By doing this,the possible karst disasters ahead of the subway tunnel face were successfully predicted,which then were verified by the excavation. By comparing the verification,it shows that the geological radar is a non-destructive short-geological prediction tool with high accuracy,the water-bearing body ahead of the construction site can be forecasted more effectively,which will provide more accurate reference for the construction. Moreover,the causes and affecting factors of karst disaster were analyzed from the aspect of engineering geology,and the critical construction regions of geological forecast were pointed out. This study will provide some references and theoretical basis for the cause analysis and early warning of geological disaster for the similar projects.