Arcing insulator on Red Line (4/27/16) - again

There is an arcing insulator on the Red Line, causing trains to bypass Friendship Heights. I only post this because this is what, the third or fourth (?) arcing insulator on the Red line in this segment over the past 7 days? https://www.washingtonpost.com/news/dr- ... nter-stop/

JDC wrote:There is an arcing insulator on the Red Line, causing trains to bypass Friendship Heights. I only post this because this is what, the third or fourth (?) arcing insulator on the Red line in this segment over the past 7 days? https://www.washingtonpost.com/news/dr- ... nter-stop/

6 separate incidents since the 23rd. 4 on A2, 2 on A1.

Isn't that within the area where they have a water impingement problem in the tunnels that nobody wants to fix?

More: https://www.washingtonpost.com/local/tr ... ge%2Fstory

MCL1981 wrote:Isn't that within the area where they have a water impingement problem in the tunnels that nobody wants to fix?

Yea the tunnel in that area has the water ingress issue.

Metro is about to conduct a maintenance 'surge' to address this issue. https://wamu.org/news/16/04/28/metro_an ... g_red_line

JDC wrote:Metro is about to conduct a maintenance 'surge' to address this issue. https://wamu.org/news/16/04/28/metro_an ... g_red_line

This is pretty bad considering they shutdown the Metro for an entire day to a safety inspection of third rail jumpers. Unless, that was the only thing they were looking for.

DUring the shutdown, they were looking for anything. But only repaired critical issues and jumpers.

JDC wrote:Metro is about to conduct a maintenance 'surge' to address this issue. https://wamu.org/news/16/04/28/metro_an ... g_red_line

Sounds like they're only trying to divert the leaks off the third rail and into drainage that's not able to handle it. Temporary, unfortunately.

They really need to start injecting concrete or liquid latex in these leaks, or do something more long-term, starting last year.

"STrRedWolf"
They really need to start injecting concrete or liquid latex in these leaks, or do something more long-term, starting last year.

WMATA has been pumping grout into surrounding bedrock for years. The exercise has become a game of wack-a-mole. They plug up one area only to have the water find a new path of least resistance somewhere else.

I think the recent option that was deemed to costly could be done more cheaply by building a steel frame supporting a sheet metal roof to divert the water. The steel frame would be bolted and or welded to the existing steel horse shoe arch ribs that are embedded in the existing shotcrete tunnel linings.


Existing.


Existing.


With sheet metal roof.