Class I 3 tunnel ventilation does not use high-power and high-performance fans, but uses air pipes to supply air to the excavation face, and does not detect the toxic, harmful, combustible and oxygen content of the air in the tunnel as required
.
Shield tunnel construction of cable line engineering 1
.
The notice of the State Grid Infrastructure Department on printing and distributing the list of class I and II major accident hidden dangers (Trial Implementation) on the construction site (Jjian Anzhi [2018] No
.
The gas detection was not carried out in real time
.
Classification of hidden danger content 1
.
Class II.
.
In class II 5 substation, the iron pipe is lifted above the head when moving, and the safe distance from the live part is not maintained
.
Class II 4 live line work, work and walk beyond the scope, tamper with irrelevant equipment and safety appliances
.
When the work in the limited space was completed and the workers were withdrawn, they were not counted according to the work order
.
82) stipulates that if the list of class I and II hidden dangers is touched, a stop work order shall be issued immediately, and the relevant units shall be ordered to stop work for rectification on the construction site, and the work can be resumed only after passing the acceptance
.
During the earth excavation, the soil around the foundation pit was not observed for cracks, water seepage and other abnormal conditions, and the monitoring was not carried out
.
Class II 3 did not detect before entering the limited space
.
Class I 2 uses oil and gas generators and other equipment in wells and tunnels
.
Class I 2
.
When the oil generator is used near the wellhead, it is not placed at the air outlet
.
Cable laying and joint construction of cable line engineering 1
.
Two wellheads were not opened in limited space construction
.
Class I 2 did not do a good job in site investigation, and did not make effective protection plan or relocation for the pipelines and underground buildings (structures) that may be affected
.
