大型隧道断层破碎带超前地质预报方法  

Geological Prediction Method for Large Tunnel Fault Fracture Zone

作　　者：冯运江 FENG Yunjiang(China Railway 18^(th)Buraeu Group Co.,Ltd.,Tianjin 300222,China)

机构地区：[1]中铁十八局集团有限公司投资公司,天津300222

出　　处：《成都大学学报(自然科学版)》2025年第1期94-100,共7页Journal of Chengdu University(Natural Science Edition)

摘　　要：在隧道施工过程中,准确预测地质情况对于保障施工安全和控制施工成本至关重要.大型隧道掘进过程中,断层破碎带是最常见的地质风险之一,其岩体破碎程度高,含水情况复杂,给施工带来很大难度,为此研究基于红外探测技术与高分辨直流电法的大型隧道断层破碎带超前地质预报方法.以G211印江至思南段公路改扩建工程项目为实验对象,采用高分辨直流电法对大型隧道断层破碎带进行预报,同时结合红外探测技术预测该区域是否含水.最后,通过超前探孔方法对预报结果进行验证.结果表明,该方法能够有效地获取隧道测量点距掌子面不同位置的电压和电流值,通过分析这些数值,可以准确判断隧道内部介质的变化情况.基于红外探测技术与高分辨直流电法的大型隧道断层破碎带超前地质预报方法能够为施工单位提供准确的地质信息,有助于节约施工成本,提高施工效率,保障隧道施工安全,并且能提供当前隧道断层破碎带岩体破碎程度的信息,具有显著的超前预报能力,应用效果良好.In the process of tunnel construction,accurate prediction of geological conditions is crucial for ensuring construction safety and controlling construction costs.In the process of large tunnel boring,fault fracture zone is one of the most common geological risks,with high degree of rock fragmentation and complex water content,which brings great difficulties to the construction.For this reason,the researchers study the method of geological prediction of fault fracture zones in large tunnels based on infrared detection technology and high-resolution direct current(DC) method.Taking the G211 Yinjiang-Sinan highway reconstruction and expansion project as the test object,the high-resolution direct current method is used to forecast the fault zone of large tunnels.At the same time,the infrared detection technology is combined to predict whether the area contains water or not.At last,the forecast results are verified by the method of overpassing the borehole.The test results show that the method can effectively obtain the voltage and current values of the tunnel measurement points at different positions from the palm face,and by analysing these values,the changes of the internal medium of the tunnel can be accurately judged.The method of geological prediction of large tunnel fault fracture zone based on infrared detection technology and high-resolution DC method can provide accurate geological information for the construction team,which can help to save construction cost,improve construction efficiency,and guarantee the safety of tunnel construction,and this method can also provide the information of the current degree of rock fragmentation of the fault fracture zone of the tunnel with a significant prediction capability,and the application effect is good.

关 键 词：红外探测技术 高分辨直流电法 大型隧道 断层破碎带 超前地质预报 

分 类 号：U452.11[建筑科学—桥梁与隧道工程]