A Study on Encoding of Urban Underground Space Facilities Based on Omniclass

In recent years, urban construction and management have entered a new era of intelligence. BIM technology has become one of the crucial technologies for the entire life cycle process of planning, designing, constructing, and operating in urban underground space facility (UUSF). However, the current UUSF standards still lack a unified coding system based on the entire life cycle of the facility. This lack results in difficulties for facility data to be interconnected in the BIM environment. This paper examines the coding research results of related industries both in China and internationally. Based on Omniclass, a classification and coding system for UUSFs is proposed. The existing UUSF coding standards are also combined with Omniclass to establish mapping rules between Omniclass and existing coding. This results in a set of methods for coding UUSFs based on Omniclass. Coding examples of some facilities are also provided in the paper. The coding method proposed in this paper can provide theoretical support for the application of UUSF data in the BIM environment. It facilitates the efficient transmission of underground space data in the entire life cycle of UUSFs.