严重液化地层沉管隧道抗震计算

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。

Seismic Calculation for Immersed Tunnels in Stratum Subject to Serious Liquefaction

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.