Five construction methods of inspection wells have the following advantages and disadvantages:
1. Traditional brick inspection wells: need to be manually built, the
quality depends on the technical level of workers. Low labor
productivity is not conducive to rapid pipeline assembly construction,
affecting urban traffic. Low strength and loose inner skin after using
for a period of time cause the overall subsidence of inspection wells
and the settlement of surrounding pavement, which has become a common
problem in road engineering. High permeability and pollution of
groundwater resources. Clay sintering destroys farmland.
2. Cast-in-situ concrete inspection wells: on-site formwork support,
large excavation section, large disturbance current soil range. The
support formwork of special-shaped inspection wells is very difficult.
Maintenance time is long. The overall cost is high.