综合探测技术在岩溶隧道突水成因判定中的应用与研究

Application and research of comprehensive detection technology in determining causes of water inrush in karst tunnel

随着基础建设力度的不断加大,岩溶隧道工程层出不穷,随之出现了大量的岩溶隧道突水案列,隧道突水成因作为制定治理措施的重要前提,其分析尤为重要。为高效辨别突水成因,有效预防和治理突水地段,确保施工安全,本文结合云南九顶山隧道突水实例,基于时空多尺度原理,提出了"多尺度复核式"探测手段。在时间尺度上,以水文长期监测数据为基础,进而在空间尺度上,从掌子面到区域地质进行综合分析,从而快速、准确地判定隧道岩溶区域突水成因。通过该方法,准确探测了九顶山突水成因为掌子面前方层间裂隙导通的岩溶水,且水源补给条件一般,探测结果为后续开挖过程中成功地采用管棚等超前支护手段提供了理论依据。

With the increasing intensity of foundation construction,more and more tunnel projects emerge one after another with a large number of karst tunnel water inrush cases.As an important prerequisite for formulating control measures,the analysis of water inrush causes is particularly important.In order to effectively identify water inrush causes,prevent and control water inrush sections,and ensure construction safety,the"multi-scale rechecking"detection method is proposed based on the Jiudingshan tunnel water inrush example in Yunnan Province and the time-space multi-scale principle.On the time scale,which is based on long-term hydrological monitoring data,and on the spatial scale,which is based on the comprehensive analysis from the face to the geological region,they can quickly and accurately determine the causes of the water inrush in the tunnel karst region.Through this method,the karst water caused water inrush in Jiudingshan tunnel due to the continuity of the interlayer fissures in front of the face is accurately detected,and the water supply conditions are general.The detection results successfully provide theoretical basis for the subsequent excavation process using the advanced support methods such as the pipe shed.