应用HSP法的TBM隧道施工地质预报技术研究

Study on Geological Prediction Technology of HSP Method for TBM Tunnel

  • 摘要: 为了减少地质预报工作对施工工序的影响和实现TBM隧道的快捷地质预报,文章结合TBM的施工环境,分析了TBM施工隧道地质预报的重难点,介绍了适用于TBM施工的HSP法原理和探测方案。该HSP法以刀盘滚刀破岩产生的震动信号为震源信号,采取多通道、长时间序列接收,通过相关干涉、聚焦成像等处理技术,获取前方地层特征参数,实现对TBM施工隧道掌子面前方不良地质的探测。通过在某双护盾TBM施工隧道中运用HSP法进行地质预报,预报结论与揭露情况一致性较好。应用结果表明,HSP法是适用于TBM隧道施工地质预报的高效方法之一。

     

    Abstract: In order to reduce the influence of geological prediction on construction procedure and realize efficient geological prediction for TBM tunnels, this paper analyzes the key points and difficulties of geological prediction in TBM tunnel considering the construction environment, introduces the principles and detection scheme of HSP method which is suitable for the TBM tunnels. The HSP method can directly use seismic waves excited by TBM cutters as source signal and obtain stratigraphic characteristic parameters by adopting the technologies of multichannel, longtime, sequence receiving,correlation interference and focusing imaging during data acquisition, realizing geological prediction in front of tunnel working face. The HSP method is applied to a double shield TBM tunnel and the prediction results are in good agreement with the actual geological conditions of the surrounding rocks, it shows the HSP method is one of the efficient geological prediction methods suitable for TBM tunnels.

     

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