Installation and Configuration Manual
8
Material: 425# silicate cement and medium sand. The ratio of cement to sand is 1:2. The refuge
island cannot be made with materials such as soil, stones, and bricks, which are not strong enough.
Ground material requirements:
Cement subgrade: The refuge island foundation can be directly laid on it. However, on the
bottom of refuge island, steel bars should be placed every 25 cm in a star-shaped structure
for connection. The diameter of the steel bars should be more than Φ20 mm, and it should
not be less than 5 cm deep into both the refuge island and underground.
Asphalt subgrade: The refuge island foundation can be directly laid on it, but on the bottom
of the refuge island, steel bars should be placed every 25 cm in a star-shaped structure for
connection. The diameter of the steel bars should be over Φ20 mm, and the steel bar should
not be less than 5 cm deep into the refuge island and 20 cm underground.
Soil and other subgrade: a foundation pit should be dug for construction, with a depth of more
than 30 cm.
2.2.1.4 Conduit Layout of Refuge Island
The conduit of entrance and exit management system for a single-camera solution is shown in the
following figure.
Conduit layout of refuge island for single-camera solution
To Next Page
Loading...
