GPT超前地质预报技术在马留山隧道中的应用

Application of GPT of tunnel geological prediction in Maliushan Tunnel

隧道超前地质预报对于预测围岩情况、指导隧道施工有着重要意义。本文介绍了GPT技术的原理和在国内外应用的现状,结合马留山隧道的地质超前预报,分析论证了GPT超前地质预报系统在隧道超前地质预报中应用的有效性,得出了马留山隧道左线ZK50+735～ZK50+935区段200m范围内的围岩属于中强风化砂岩,局部有渗水,稳定性和完整性稍差,属于IV级围岩,说明了GPT超前地质预报技术是保证隧道施工顺利安全施工的重要地质预报手段,展示出该系统在隧道施工中的广阔应用前景。

Tunnel geological prediction for predicting the surrounding rock situation, guide the tunnel construction is of great significance. Combination of geological advanced prediction of Cairn Tunnel, through the main principles of the specified tunnel geological prediction and analysis demonstrates the effectiveness of the application of the GPT advanced geological prediction system in the tunnel geological prediction. A new type technology of geological prediction in Maliushan Tunnel is introduced and presented in the paper, it can be drawn that the surround rock at left line between ZK50 ＋735 - ZK50 ＋935 of the Maliushan Tunnel is classified as s type IV, belonging to strongly weathered sandstone, with partially water seepage and weaker in stable and integrity, therefore the construction safety of the tunnel is ensured dynamically under the guidance of the prediction above. The GPT advanced geological prediction technology is to ensure smooth and safe construction of tunnel construction geological prediction means to demonstrate the broad application prospects of the system in tunnel construction.