underground comprehensive pipeline gallery (hereinafter referred to as comprehensive pipeline gallery) is a comprehensive corridor of urban underground pipelines, which is to build a tunnel space underground in the city, and concentrate all kinds of engineering pipelines such as water supply and drainage, electric power, gas, heating and insulation pipes on this laying.
for municipal pipelines (hereinafter referred to as dangerous sensitive pipelines) transporting hazardous sensitive media, such as gas pipelines, heat preservation pipelines (including hot water pipes and steam heat preservation pipes) in cities and towns, the traditional direct buried pipelines are replaced by pipeline galleries, where dangerous pipelines enter and exit pipeline galleries, intersecting and avoiding junctions and corresponding pipeline galleries are attached. new technological changes will be brought about in terms of functional requirements of facilities.
at present, most of the domestic comprehensive pipeline corridor construction avoids or avoids the laying of dangerous pipelines in the corridor as far as possible. on the one hand, the small-scale limited space of dangerous pipelines in cabin (corridor) joints is not widely consistent with the laying technology of related facilities or structures and the principle of intersection avoidance; on the other hand, the main reason is that the corridor structural system and the principle of intersection avoidance are not widely consistent. the integration of reliability allocation under different life expectancy of dangerous pipeline system has not been involved. especially in the whole life cycle of pipeline service environment, the intrinsic safety principle is applicable to the full coverage and collaborative and effective system of dangerous pipeline design, construction, quality acceptance, pressure pipeline supervision, daily operation and maintenance management in pipeline gallery. under the realistic conditions that the rules and standards of the system have not yet been promulgated or need to be improved.
in view of the above reasons, effectively solving and meeting the problems of construction, acceptance, operation and maintenance of gas pipeline and thermal insulation pipeline laid in underground comprehensive pipeline gallery will have potential and realistic social significance for the construction of urban underground comprehensive pipeline gallery in china.