调水工程富水破碎洞段综合超前地质预报技术

为避免或减小隧洞穿越富水破碎岩体发生突涌水、塌方等造成的危害,提出了基于地质分析、隧道地震预报(TSP)法与超前钻探结合的综合超前预报体系。首先通过地质分析对不良地质进行评估,之后利用TSP法对前方不良地质体进行定位,确认有不良地质构造存在,最后利用超前钻探进行预报。滇中引水工程富水破碎洞段的两个工程实例表明,此预报技术可准确地预测不良地质段以及涌水段位置和规模大小,可帮助工程技术人员及时地制定相对应的预警措施和处理对策,从而减少施工过程中突泥、涌水、塌方等地质灾害出现的概率,保证隧洞安全施工。

Comprehensive Advanced Geological Prediction Technology for Water-rich Broken Tunnel Segment of Water Transfer Project

To mitigate or even avoid water inrush and collapses caused by tunnels crossing water-rich broken rock mass, a comprehensive advanced prediction system based on geological analysis, TSP (tunnel seismic prediction) method and advanced drilling is proposed. The unfavorable geology is evaluated through geological analysis, and then the TSP method is used to locate the unfavorable geological body in front. Subsequently, advanced drilling is used to predict the location and scale of the unfavorable geological structure after it is confirmed. Two engineering examples of the water-rich fractured segment of the Central Yunnan Water Diversion Project demonstrate that the proposed technology could accurately predict the location and scale of unfavorable geology and water inrush. Corresponding early warning measures and countermeasures can be made in time to reduce the probability of geological disasters such as mud inrush, water inrush, and landslides in the construction process and to ensure the safe construction of the tunnel.