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在隧道开挖过程中,对掌子面前方岩性进行比较准确的预报,可有效地防止工程事故、加快施工进度以及保证工程质量。目前常用的地质超前预报方法可归为破坏法和非破坏法两类,其中非破坏法中的工程地质调查与推断法和隧道内地震映像预报技术具有预报距离长、预报费用低和探测时间短等独特优越性。据此,本文采用工程地质调查与推断方法和隧道内地震映像预报方法相互比较、相互印证,特别对地震映射法技术原理和数据采集、处理系统作了介绍,并归纳和总结了其在那下湾隧道工程中的成功应用。
In the process of tunnel excavation, relatively accurate prediction of lithology in front of the face can effectively prevent engineering accidents, speed up the construction progress and ensure the project quality. At present, the commonly used method of geological advance prediction can be classified into two types: destructive method and non-destructive method. Among them, the engineering geological survey and inference method in non-destructive method and the seismic image prediction technology in tunnel have the advantages of long forecasting distance, low forecasting cost and short probing time Unique advantages. Therefore, this paper compares and confirms each other with the method of engineering geological survey and inference and the seismic image prediction method in the tunnel, especially introduces the technical principle of seismic mapping and the data acquisition and processing system, and summarizes its under that Bay tunnel project in the successful application.