长大隧道突发性地质灾害预警信息系统研究

针对国内外长大隧道施工过程中频繁遇到的突发性地质灾害(涌水、突泥,以下同)对工程造成重大损失和人员伤亡,调研国内外长大隧道突发性地质灾害发生现状和危害,首次提出隧道突发性地质灾害预测预报方法为灾害发生前兆的现象预报法和S-t曲线变化趋势判断法;并对主要风险源水压和水量、水质、初期支护内力及围岩位移进行监控,给出相应的预警标准。笔者研究并开发了隧道灾害预警系统,在浏阳河隧道过河段现场使用;结果表明,该系统能较好地适应隧道复杂环境,稳定性好,能对采集到的数据分析判别,对长大隧道安全施工具有一定的指导意义。

Study on Abrupt Geological Hazard Forewarning Information System of Large Tunnels

Aiming to decrease the occurrence of great loss and casualties caused by frequent abrupt geological hazard during tunnel construction,this paper put forward precursory phenomena forecast method and judgment method of S-t curve changing tendency based on the investigation of abrupt geological hazards of large tunnel at home and abroad,and proposed corresponding warning standard of hydraulic pressure,water volume,water quality,internal force of early supports and surrounding rock displacement.On this basis,the abrupt geological hazard warning information system was developed and applied in Liuyanghe Tunnel.It is shown that the system can analyze the collected data with good stability and possesses guiding significance to the safe construction of large tunnels.