Urban underground structure, including tunnels, subway stations, underground pipelines, is an important part of urban infrastructure. It greatly affects urban operations, economic development and the safety of people's lives. Therefore, it is necessary to study its seismic properties.<br>Seismic research of underground structure is mainly through prototype observation, model test and theoretical analysis. Scholars have done a lot of research.<br><br>The underground structure is surrounded by the surrounding soil body, its deformation is bound by the surrounding soil body, the characteristics of the soil body itself is also critical to the underground structure earthquake resistance. Underground structures are constructed in a variety of soil environments, some of which can be liquefy by earthquake. Seismic liquefaction of soil will have serious adverse effects on the site and structure.<br>The effect of seismic liquefaction on structure of soil body still needs more research.<br>Studying the effect of seismic liquefaction on structure of soil is beneficial to the designers of underground structures to design underground structures rationally at the sites where seismic liquefaction is possible. According to the existing research results and the existing problems in the current situation of research, the following new problems can be put forward. What is the interaction between soil and structure after seismic liquefaction?
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