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GB/T 41447-2022Technical specification for three-dimensional modeling of urban underground space (English PDF)

城市地下空间三维建模技术规范

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

April 15, 2022

Implementation date

April 15, 2022

Scope

GB/T 41447-2022 is the English-translated version of 城市地下空间三维建模技术规范.

GB/T 41447-2022 is the Chinese technical specification for the three-dimensional modelling of urban underground space.

It gives the basic requirements, the modelling process and the modelling methods, and then the requirements for modelling underground buildings, underground pipelines, utility tunnels, underground transport facilities and the surrounding geological bodies.

It applies to the technical design, the building of the model and the quality inspection of such work. Survey institutes, city administrations and the firms that build the models use it. Issued on 15 April 2022, it applies from the same date.

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Document preview — GB/T 41447-2022

National Standard of the People's Republic of China

ICS: 07.040
Classification: A 75

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

Preface
1 Scope
2 Normative references
3 Terms and Definitions
4 Abbreviations
5 Basic requirements
5.1 Space-time benchmark
5.2 Model Classification
5.3 Model classification
5.4 Quality Requirements
6 Modeling process
6.1 Requirements Analysis
6.2 Technical Design
6.3 Data acquisition
6.4 Geometric Modeling
6.5 Attribute Association
6.6 Texture Mapping
6.7 Model Integration
6.8 Quality Inspection
6.9 Submission of results
7 Modeling methods
7.1 Classification of Modeling Methods
7.2 Modeling based on mapping data
7.2.1 Modeling based on 3D point cloud data
7.2.2 Modeling based on other mapping data
7.3 Modeling based on design and construction data
7.3.1 Modeling based on engineering drawings
7.3.2 Modeling based on BIM data
7.4 Modeling based on geological survey data
7.4.1 Modelling based on geological borehole data
7.4.2 Modeling based on geological profile data
7.4.3 Modeling based on geological plane data
7.4.4 Modeling based on multi-source geological data
8 Modeling underground buildings
8.1 General requirements
8.2 Modeling Method Selection
8.3 3D Directed Bounding Box Construction
8.4 External Surface Model Construction
8.5 Inner Surface Model Construction
8.6 Functional Space Model Construction
8.7 Component Model Construction
9 Modelling of underground pipelines
9.1 General requirements
9.2 Modeling Method Selection
9.3 3D Directed Bounding Box Construction
9.4 Construction of pipeline surface model
9.5 Pipe point notation construction
9.6 Pipe point model construction
10 Comprehensive pipe gallery modeling
10.1 General requirements
10.2 Modeling method selection
10.3 3D Directed Bounding Box Construction
10.4 External Surface Model Construction
10.5 Modelling of inner surfaces
10.6 Functional Space Model Construction
10.7 Component Model Construction
11 Modeling of underground transportation facilities
11.1 General requirements
11.2 Modeling Method Selection
11.3 3D Directed Bounding Box Construction
11.4 Modeling of the outer surface
11.5 Modelling of inner surfaces
11.6 Functional Space Model Construction
11.7 Component Model Construction
12 Modeling of surrounding geological bodies
12.1 General requirements
12.2 Modeling Method Selection
12.3 Surface Model Construction
Appendix A (normative) Basic content of model metadata
Appendix B (informative) Basic attribute information of surrounding geological bodies
Reference

Foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1: Structure and Drafting Rules of Standardization Documents" drafted.

1 Scope

This document specifies the basic requirements, modeling process, modeling methods, and underground buildings, underground pipelines, Requirements for the modeling of comprehensive pipe corridors, underground transportation facilities and surrounding geological bodies.

This document is suitable for technical design, model construction and quality inspection of 3D modeling of urban underground space.

2 Normative references

The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, dated citations documents, only the version corresponding to that date applies to this document; for undated references, the latest edition (including all amendments) applies to this document.

GB/T 12328 Comprehensive Engineering Geological Map Legend and Color Scale

GB/T 18316 Quality inspection and acceptance of digital surveying and mapping results

GB/T 28590 Classification and Code of Urban Underground Space Facilities

GB/T 35636 Specification for Surveying and Mapping of Urban Underground Space

GB/T 51301 Building Information Modeling Design Delivery Standard

3 Terms and Definitions

The following terms and definitions apply to this document.

3.1 Urban underground space

In order to meet the needs of human production and life, the space that can be developed, constructed and utilized below the urban surface.

Note: It usually includes artificial facilities such as underground buildings, underground pipelines, integrated pipe corridors and underground transportation facilities and their surrounding geological bodies.

3.2 Three-dimensional modeling

Based on surveying and mapping data, design and construction data, and geological survey data, express the objects of urban underground space artificial facilities and their surrounding geological bodies The process of semantic, spatial location, geometric morphology, texture features and attribute information.

3.3 Underground building

Underground space buildings, structures and their ancillary facilities except for underground transportation facilities, integrated pipe gallery and underground pipelines. [Source: GB/T 35636-2017, 3.2]

3.4 Underground pipeline

Pipes, trenches, pipe galleries, cables and their ancillary facilities that are laid underground for the transmission of energy, information, materials and waste discharge. [Source: GB/T 35636-2017, 3.5, with modifications]

3.5 Integrated pipe gallery utilitytunnel

Special tunnels and their ancillary facilities built underground and used for laying two or more types of underground pipelines.

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 21 pages — is available in the English PDF.

Referenced standards

Normative references

Cited by

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