通过介绍目前连拱隧道的主要结构形式、结构设计方法（特别是关于中墙的设计方法）、施工工法（特别是关于连拱在浅埋偏压条件下合理的施工工序）、监控量测及超前地质预报以及防排水的国内研究现状，提出下一步亟待解决的问题，并对可能出现的新形连拱隧道形式进行了展望。

On basis of presenting the stateoftheart of the researches on the major structural types, the structural design methods (particularly the design methods for the central walls), the construction methods (particularly the proper construction sequences of the doublearch tunnels with asymmetrical pressure and shallow cover), the monitoring and measurement, the geology forecasting and the waterproofing and drainage of doublearch tunnels that have been made in China, the author summarizes the problems regarding doublearch tunnels that are to be urgently solved in the future and make an outlook on the new possible types of doublearch tunnels.