GB/T 40122-2021
ActiveFull face tunnel boring machine—Rectangular earth pressure balance pipe jacking machine
全断面隧道掘进机 矩形土压平衡顶管机
Application Summary AI generated
This standard specifies the technical requirements, test methods, inspection rules, and marking for rectangular earth pressure balance pipe jacking machines used in full-face tunnel boring. It is applied in the construction of underground passages, such as pedestrian underpasses, utility tunnels, and subway cross passages, where non-circular cross-sections are required to maximize space utilization. The standard ensures the machine's performance in maintaining soil pressure balance during pipe jacking operations in soft ground conditions.
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Transparency note: The application summary and key sentences on this page were automatically generated by AI from the standard's original text. This content has not been human-verified and should not be used for compliance or regulatory purposes. Always refer to the official standard document from the issuing authority.