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中文摘要：
根据某海底隧道F1风化槽结构地质特点及其与隧道的位置关系,概化隧道突水地质模式,通过颗粒流数值仿真对隔水岩层突水通道的形成过程、突水的影响因素进行了分析。结果表明,保证临界隔水岩体的完整性和稳定性是防止突水的关键;海底隧道穿越风化槽突水通道的初步预测与定位,是海底隧道穿越风化槽注浆加固设计的基础。基于以上分析,采用复合注浆方法对F1风化槽进行了堵水和加固,取得了较好的工程效果。
英文摘要：
Based on the weathered slot configuration and the spatial relation between the weathered slot and the tunnel, the weathered slot water burst is divided into different geological modes. Combined with above study, numerical tests with PFC under coupling environment are conducted to investigate the initiation of fractures, activation of weathered slot and formation of groundwater inrush pathway during the tunnel passing closely through the weathered slot structures with high water pressure. Keeping the completeness and stability of the rock pillars is of key importance to avoid water burst and to minimize relevant loss when the tunnel passing closely by the weathered slot structures. In order to assure that the subsea tunnel can pass the weathered slot F1 successfully, the technique of composite grouting is adopted to reinforce the soil to block up the water and a good result is gained.
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