GB/T 51310-2018 in English

The new version of the standard system architecture expands the technical content by 43% compared with version 1999, and the requirements for intelligent control are significantly improved. The key technical changes are mainly reflected in:

Analysis of new chapters

• Immersed tube construction clearly defines the three-stage control of underwater docking: foundation trench treatment (allowable deviation <50mm), pipe segment manufacturing (flatness 1/1000D), hydraulic pressing (pressure deviation ±5%)
• BIM implementation clauses require that all concealed projects be modeled in three dimensions, and the error with the entity be controlled within <15mm

Innovative construction method system

Intelligent monitoring integration

Chapter 33 stipulates more than 800 joint debugging test indicators, and the PMS system of key equipment must meet the following requirements:

• Emergency response time ≤ 0.8 seconds
• Interface error with integrated monitoring system ≤ 15ms
• Vibration control benchmark with sigma value ≤ 0.3

• Digital acceptance: Promote the binding of engineering data QR code, and increase the frequency of structural entity inspection by 33%
• Full material traceability: The electronic identity code of concrete must include the raw material batch + quality inspection list
• 3D scanning archive: Tunnel contour point cloud comparison accuracy 0.5mm/m

Project example: A line in Beijing uses gel-curing grouting technology, with settlement controlled to <3mm (12mm allowed by the specification), saving 42% of maintenance costs.