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中文摘要：
由于海底隧道复杂的地质条件和特殊的水边界,单一的注浆方式和注浆材料不能达到理想的效果,因此提出复合注浆。复合注浆是采用多种注浆方式和注浆材料,根据具体地层条件,按照一定的时空顺序对被注载体进行注浆,其机制在于分步改善工程载荷作用的边界条件,解决围岩的渗透、强度和稳定性问题。基于风化花岗岩地层的特点,利用颗粒流软件对注浆过程进行仿真模拟,揭示复合注浆机制,并提出常见的复合注浆加固模式。结合厦门海底隧道右线F1风化槽复合注浆工程的成功实践,形成风化槽复合注浆堵水关键技术及评价指标,研究成果可为海底隧道安全穿越不良地质体提供参考和指导。
英文摘要：
Because of the complicated geological condition and especial water condition,the simplex grouting scheme and material can not arrive at the perfect effect,and the composite grouting technique is introduced,which can take advantage of different grouting technologies and materials.The composite grouting is an economic and effective measure to strengthen the weathered slot to the full extent,which means that grouting in the ground by using different grouting technologies and materials can solve the problems of permeability,strength and stability of the surrounding rock during tunnel excavation according to a special time and space sequence.Based on the characteristic of strong weathered granite stratum,the composite grouting process is simulated by particle flow code（PFC）.Then,the composite grouting mechanism is revealed and several grouting reinforcement schemes are proposed.Combining the successful application of composite grouting to weathered slot F1 of Xiamen subsea tunnel,the key technique and evaluation indices of composite grouting for water blockage in weathered slot of subsea tunnel are presented,so as to provide references and guidelines for the engineerings of passing through unfavorable geologic bodies during subsea tunnel construction.
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