The integrated pipeline corridor integrates various engineering pipelines such as power, communication, gas, heating, water supply and drainage, and the facilities can be unified planning, construction and management. What are the disadvantages of underground integrated pipelines? 1. As rainwater and sewage pipelines inevitably produce H2S, biogas and other toxic and harmful and combustible gases during operation, if these gases leak into the corridor cabin, there will be safety hazards. 2. Rainwater and sewage leakage can also adversely affect the safe operation and maintenance of the pipe gallery, so it is necessary to ensure the tightness of its system. The gas concentration should be monitored in real time to avoid the occurrence of fire and explosion.