盾构的电气系统可靠性分析

Analysis on Reliability of Electrical System of Shield Tunneling Machine

随着中国大中城市地下交通的迅速发展，盾构设备的用量与日俱增。盾构作为大型的施工机械，它的用电设备数量多且用电量大，在施工过程中经常发生开关跳闸、电气元件损坏或误动作，危及人员安全。这些问题在造成设备及人员较大损失的同时，也会对施工的工期产生重大影响。究其原因，多数是由于电气系统的可靠性较差。

The high voltage supply system,low voltage distribution system,grounding system and alarm and control system for electric fire protection(EFPACS) of electrical system of shield tunneling machine are analyzed in details.And component selection of electrical system,cables selection and deployment,electrical system safety in design and construction are discussed.Results show that only the electrical system is reliable;the safety of staff and equipments should be ensured.