研究目的: 海底隧道由于上部复杂的海域交通环境、水域条件,且地形、地质条件多变,传统的勘察手段和设备在海底隧道工程的勘察中存在诸多局限性。本文以项目为依托,结合项目地的特点,引入三维地震反射技术对跨海域隧道工程进行勘察,探索复杂环境下的海底隧道勘察新思路,旨在为工程设计提供可靠的勘察成果。
研究结论: (1)通过三维地震反射勘探,结合钻探成果的校正,可以准确模拟各套地层面、构造等的形态、位置和相互接触关系,为设计提供可靠的地质依据及物性参数;(2)根据三维地质建模成果,可分段对隧道洞身段地质情况进行分析,提供了测区内隧道洞身岩土地质条件,为工程设计提供了可靠的依据;(3)结合多源数据进行的地质建模,可显著提高地质模型精度,标高统计分析显示平均差值百分比仅为0.907%,地质模型精度高,可靠性好;(4)本研究成果可运用于水域隧道工程的勘察。
Abstract
Research purposes: Due to problems such as the maritime traffic environment, the marine beacon condition and the changing terrain and geological conditions, the traditional survey methods and equipments have many limitations in subsea tunnel engineering survey. Based on the project and combined with the characteristics of the project site, the 3D seismic reflection technology was applied to investigate the subsea tunnel engineering, and the new idea of subsea tunnel in complex environment was explored, to provide reliable survey results for engineering design.
Research conclusions: (1) Based on the 3D seismic reflection technology and correction of drilling results, we can accurately simulate the shape, position and mutual contact relationship of each ground level and structure, and provide reliable geological basis and physical parameters. (2) According to the 3D geological modeling results, we can analyze the geological conditions of the tunnel section and provide the geotechnical geological conditions of the tunnel, which can provide reliable basis for engineering design. (3) Geological modeling combined with multi-source data can significantly improve the accuracy of geological model. Analysis shows that the average difference percentage can reach 0.907%, which gets high accuracy and good reliability. (4) The research results can be applied in the investigation of the underwater tunnel.
关键词
三维地震反射法 /
海底隧道 /
勘察 /
应用研究
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Key words
3D seismic reflection technology /
subsea tunnel /
survey /
application and analysis
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中图分类号：
U212.22
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