严重液化地层沉管隧道抗震计算

摘要

结合工程实例,主要对地层液化等级判别、隧道地震作用计算方法等进行探讨研究。研究结果表明：对于埋深大的隧道工程,可以采用有限元法进行地层液化判别;不同的地层液化情况对地震作用计算结果,特别是对于接头处的内力影响很大,同时应充分考虑接头间止水带的影响。%Study is made on the judgment of the stratum liquefaction grade and the calculation methods for the seismic effect on tunnels,with Luntou-Shengwudao immersed tunnel as an example.Conclusions drawn are as follows： for tunnels with deep overburden,finite element method can be adopted to determine the stratum liquefaction grade;liquefaction conditions have great influence on the seismic effect calculation results,especially on the internal force of the joints;full consideration should be paid to the seismic influence on the water stop ties at the joints.