A comprehensive pipe gallery is a structure and ancillary facilities built underground in a city to accommodate two or more types of urban engineering pipelines. The underground comprehensive pipe gallery, also known as the "common trench", refers to the integration of various municipal pipelines such as electricity, communication, gas, water supply, reclaimed water, drainage, and heat, and the construction of an intensive tunnel in the underground space of urban roads.

The comprehensive pipe gallery is one of the important symbols of modernization in the construction of new urban municipal infrastructure today. The construction of the comprehensive pipe gallery avoids the impact and interference on traffic and residents' travel caused by frequent excavation of underground pipelines during laying and maintenance. It can maintain the integrity and aesthetics of the road, reduce the cost of multiple road surface renovations and the maintenance cost of engineering pipelines. Maintained the integrity of the road surface and the durability of various pipelines. At the same time, it is also convenient for the laying, addition and reduction, maintenance, and daily management of various pipelines. Due to the compact and reasonable layout of pipelines in the comprehensive pipe gallery, the space under the road is effectively utilized, urban land is saved, and favorable conditions are provided for underground space development. Due to the reduction of road poles and inspection wells and chambers for various pipelines, the beautiful urban landscape has been improved, saving a large amount of construction land, which is conducive to increasing effective investment in public goods, driving social capital investment, and creating a new driving force for economic development.

The fire alarm system is a fire protection system that detects the early characteristics of a fire, sends out fire alarm signals, and provides control and indication for personnel evacuation, preventing fire spread, and activating automatic fire extinguishing equipment. The fire alarm system consists of a centralized alarm controller, a graphic display device in the fire control room, a linkage control panel, a regional fire alarm controller, a gas fire extinguishing controller, a smoke fire detector, a cable type linear temperature fire detector (temperature sensing cable), a manual fire alarm button, a fire sound and light alarm, an input module, an output module, etc. Realize the linkage control of fire detection and related equipment within this alarm area.

Specific applications in urban comprehensive pipe corridors:

Each alarm zone in the comprehensive pipe gallery is equipped with one set of automatic fire alarm control system, and each compartment is equipped with one set of manual alarm buttons and alarm bells every 50 meters; Install cable type linear temperature fire detectors (temperature sensing cables) or linear fiber optic temperature fire detectors on S-shaped power cables on each layer; Install point type smoke fire detectors (or linear fiber optic temperature fire detectors) on the top of each compartment; The distribution room is equipped with point type smoke fire detectors, point type temperature fire detectors, and fire telephone extensions. The fire alarm controller is connected to the smoke fire detector, cable type linear temperature fire detector, manual fire alarm button (with telephone jack), fire sound and light alarm, input module, and output module in this section through the alarm bus, to achieve fire monitoring and related equipment linkage control in this alarm area.

Each partition control room includes fire alarm controllers, fire door monitors, emergency lighting controllers, electrical fire monitoring equipment, fire equipment power monitors, combustible gas alarm controllers, linear fiber optic temperature fire detectors, gas fire extinguishing controllers, and graphic display devices in the fire control room. Each area has fire alarm controllers, fire door monitors, emergency lighting controllers, electrical fire monitoring equipment, fire equipment power monitors, and combustible gas alarm controllers.