红外探测技术在龙潭隧道F_2断层段超前预报中的应用

Application of infrared detection in advanced prediction at F_2 fault of Longtan tunnel

突水突泥灾害是深长岩溶隧道的主要地质灾害之一,要避免深长岩溶隧道施工过程中的突水突泥灾害,应对掌子面前方的隐伏含水情况进行超前探测。为准确有效预报隧道掌子面前方围岩的隐伏含水情况,须采用短期超前地质预报来配合长期地质预报。红外探测技术是一种有效、便捷的短期地质预报手段。本文阐述了红外探测技术的基本原理和探测方法,以沪蓉西高速龙潭隧道为依托工程,采用红外探测技术对该隧道F2断层段进行了隐伏水体探测,并与该段TSP预报结果进行了对比分析,开挖结果表明红外探测预报效果良好,对类似工程具有一定的借鉴意义。

The mud and water bursting disaster is one of the main geological disasters in the deep and long karst tunnel excavation. In order to avoid the disaster during the deep and long karst tunnel construction,advanced detection of concealed water condition in font of the tunnel face is necessary. To predict concealed water condition in front of the tunnel face accurately and effectively,short term geological forecast cooperated with long term forecast should be employed. Infrared detection technology is an effective and convenient measure of short-term forecast. This paper expounds the basic principle and detection method of infrared detection technology,based on Longtan tunnel engineering in ShanghaiChengdu West Expressway,using infrared detector in concealed water detection of the tunnel's F2 fault section,and comparative analysis with the prediction result by TSP of this section is made. The excavation shows that the infrared detection forecast effect is good,therefore the infrared detection technology to predict the concealed water condition would be a reference for the similar projects.