Abstract: The tunnel lining might has many problems such as hollow behind lining, insufficient compactness, construction joint collapse and fallblock, and waterstop tie deviation, etc. As a result, an intelligent tunnel lining trolley with automatic distribution and pressure casting is developed. A new technical system including automatic concrete distribution, casting with pressure, construction joint zero overlapping and cavity monitoring, etc. is established, which can avoid or reduce lining quality defects. The test results show that: (1) By adopting automatic concrete distribution system with closed pipeline and pressure casting, layerbylayer and chamberbychamber casting can be realized, the concrete segregation and pollution can be reduced, the onetime pipe replacing within 2~3 min can be realized, the construction efficiency can be improved by more than 35%, and the labor consumption can be reduced by more than 50%. (2) By adopting automatic vibrator in the arch, the uncompactness of concrete can be reduced by more than 85%. (3) With the help of doublemode control system, the positioning accuracy and safety can be improved, and the positioning time is shortened by more than 30 min compared with the conventional trolley. (4) The crack and collapse of construction joint can be avoided by adopting Vshaped groove zero lap device, and the construction becomes more convenient with visual bulkhead. (5) The application of intelligent integrated control system helps to realize automatic distribution, automatic vibration, automatic monitoring and automatic generation of data reports, and thus achieves humancomputer interaction.

Key words: tunnel lining, lining trolley, automatic concrete distribution, casting with pressure, zero lap, intelligent control