 |
 |
|
Systematic rebuilding
/ updates |
|
|
 |
|
 |
About 5,000 cave-in
accidents per year occur due to deterioration of sewage pipes.
As such, one issue to countermeasures against the deterioration of
sewage facilities |
| |
Systematic rebuilding
/ updates are indispensable in order to maintain sewer functions
and to prevent unexpected situations due to breakdown of facilities
|
|
 |
Status of superannuated
pipe and cave-in accidents |
|
 |
|
 |
|
 |
|
 |
| Visuals by TV camera |
|
|
|
Ginza |
|
Takanawa |
 |
|
| Great
increase in places where road cave-ins have taken place due
to massive increase in sewer pipe and drain extensions |
|
|
| |
No. of road cave-in
accidents caused by pipe and drain extensions and sewerage |
|
| |
Low-cost countermeasures
(pipe and drain interior coating of plastic materials) |
|
|
