scope of application

1) Design, construction, and maintenance of plastic drainage inspection wells with an outer diameter of no more than 1200mm and a burial depth of no more than 8m within the scope of residential areas (residential areas, public building areas, factory areas, etc.), urban and rural municipal services, industrial parks, and old city renovation. 2) Construction of plastic drainage inspection wells under general soil, soft soil, seasonally frozen soil, and collapsible loess soil conditions; 3) Areas with seismic fortification of 9 degrees and below. 4) The ground load of a general lane is based on a total vehicle weight of 15 tons (with a rear wheel pressure of 5 tons); The ground load of the fire lane is designed based on a total vehicle weight of 30t (rear wheel pressure of 6t). 5) The groundwater level is designed to be no higher than 1.0m below the ground level;