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隧道岩溶涌水预测是个非常复杂的问题。直到目前,在我国铁路、公路、水工等的隧道施工中还经常发生由于岩溶涌水预测错误而引起施工安全问题的事例,产生大量的岩溶突水、突泥、塌方问题。预测之所以失误,主要是对隧道岩溶涌水机理缺乏全面认识,和没有一套科学实用的评判系统以及切合实际超前探孔的方法。本文以沪蓉西高速公路乌池坝隧道为例,运用隧道岩溶综合评判的方法和有效的超前探孔技术对隧道进行预测评价及施工超前预报,取得良好的效果。
Tunnel karst water prediction is a very complex issue. Up to now, there are still many cases of construction safety caused by fault prediction of karst gushing in the construction of tunnels of railway, highway, hydraulic and so on in our country, resulting in a large number of karst inrush, mud and landslide. The reason why the prediction is wrong is that there is a lack of overall understanding of the mechanism of tunnel karst water intrusion and there is no set of scientific and practical judging system and a practical method of drilling ahead. Taking the Wuchi dam tunnel on Hu-Rong West Freeway as an example, this paper uses tunnel karst comprehensive evaluation method and effective advanced drilling technology to forecast and evaluate the tunnel and achieve good results.