厦门翔安隧道海域工程物探  

Geophysical Prospecting for Xiang'an Submarine Tunnel in Xiamen

作　　者：李坚[1] 魏栋华[1] 曹云勇[1] 杜华光[1] 

机构地区：[1]中铁二院工程集团有限责任公司,成都610031

出　　处：《铁道工程学报》2010年第6期27-31,共5页Journal of Railway Engineering Society

摘　　要：研究目的:在我国大陆地区第一座海底隧道——厦门翔安隧道的工程地质勘探中,通过研究地震反射波法的资料采集、处理和解释中的关键技术和难点,利用物探手段有效地解决海底隧道的工程地质问题,减少水上钻探的昂贵费用并缩短勘探工期。研究结论:在资料采集中,施测时间选择在海域平潮期间;在资料处理中,需把非规则多次覆盖观测系统转换成规则观测系统,通过加密速度分析点,提高资料处理质量;在资料解释中,归纳出时间剖面图中不同地质情况所对应的特征:淤泥较厚地段,海底界面反映为连续性好、频率高、能量低的反射波组;存在覆盖层时,显示为3个连续性较好的反射波组,无覆盖层时,显示为2个连续性较好的反射波组;存在裂隙或岩脉时,反射波组发生断开或上下位移。Research purposes： For the geological prospecting for Xiang＇ an Submarine Tunnel in Xiamen （the first submarine tunnel in mainland of china）, the research is done on how to effectively solve the engineering geological problems with geophysical prospecting method, seismic reflection prospecting for submarine shortening the prospecting period. such as how to tunnel, for the collect, process and interpret the data when using the purpose of reducing the expense of prospecting and Research conclusions：The data collection must be conducted during sea slack tide. The non - regulation observation system of reflection seismic exploration must be transferred to regulation observation system, and quality of data processing can be improved corresponding to the different by density geological of the velocity analysis points. In the data interpretation, the characteristics conditions in the time reflection profiles are summed up. Namely, the reflection line- ups of nicer continuity, higher frequency and lower amplitude correspond to the seabed with thicker silt, the indication of three continuous reflection line - ups correspond to the stratum covered by soil, indication of two continuous reflection line - ups correspond to the stratum with no cover of soil, and when the reflection line - ups occurrs twist or disconnection, it corresponds to the cranny or the rock -vein

关 键 词：地震反射波法 资料采集 资料处理 资料解释 

分 类 号：U452.11[建筑科学—桥梁与隧道工程]