In the construction of the large section box-type ventilation duct of metro with two storeys and double spans,there are many construction features involving large-span excavation,such as complex temporary support system,complicated force transfer for secondary structure and so on.

Analyze the market prospects of fan for Metro and tunnel in our country, introduce the type, character and applied range of fan for Metro and tunnel.

In this paper, the functional requirements and implementation method for air reversing, anti -surge, structural design and monitoring alarm system for working condition in metro fan are summarized.

This paper focuses on finding the best methods to design subway ventilation pavilion(surface facility) for Xi\'an city subway.

Analysis of ground surface settlement based on single solumn-double arched subway tunnel construction;

Contrast analysis of numerical simulation of subway tunnel earthquake response with test results;

On subway tunnel fire disaster detecting system;