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在隧道施工过程中经常遇到断层、溶洞、突水及突泥等无法预料的地质灾害,给施工带来重大灾难和无法估计的经济损失.为了保证隧道施工安全,对掌子面前面地质情况进行准确及时的超前预报具有重大的工程价值.陆地声纳法作为地震反射法的一个变种,是一种易掌握、仪器轻便的隧道掌子面前方地质预报方法.该方法与其它常归物探方法相比,可避开许多干扰波,可单道连续采集,并且有分辨率高,偏移距小,反射能量高等特点.在详细调查某引水隧道沿线工程地质情况的基础上,结合陆地声纳的探测结果,对掌子面前方的断层、溶洞和可能较大的涌水点的位置进行了预测.结果表明该方法对断层、破碎带、溶洞的探查精度较高,对水的探查可作为辅助手段.
In the process of tunnel construction, we often encounter unexpected geological disasters such as faults, caves, water inrush and mud and bring great disaster to the construction and inestimable economic loss.In order to ensure the construction safety of the tunnel, the geological conditions in front of the face It is of great engineering value to conduct accurate and timely advance forecasting.As a variant of seismic reflection method, terrestrial sonar method is an easy-to-grasp and light-weight geological forecasting method in front of tunnel face.This method is similar to other geophysical prospecting methods Compared with many interference waves can be avoided, single-channel continuous acquisition, and have high resolution, offset small, high reflection energy characteristics.In a detailed investigation of a diversion tunnel engineering geology along the basis of the combination of land sonar The results show that the method has high exploration accuracy for faults, broken zones and caves and can be used as an aid to the exploration of water means.