KevinT

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Thinking out loud: I wonder if they'll be using a more traditional segment launcher that rides the existing segments to fill in the middle? If so, that could explain why there's only concrete boxes at the very ends, for the rails of the gantry cranes used for the initial segments.
 

drum118

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I don't think it's supposed to be amogus, but I am now choosing to interpret it that way.

When the SERVICE is FREQUENT
dun dun DUN DUN dun dun dun... dun DAH dun
Not after service hours has ends.
 

crs1026

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Thinking out loud: I wonder if they'll be using a more traditional segment launcher that rides the existing segments to fill in the middle? If so, that could explain why there's only concrete boxes at the very ends, for the rails of the gantry cranes used for the initial segments.

You are on the right track. The design of the crane and “launcher” can be seen here.
Presumably the support pads that were poured at Dupont and Wallace are placed where the gantry will be stationed to raise segments up to the “launcher”. Looks like the next stage of the work will be at the Wallace end, possibly with girders being placed northwards from there.

- Paul
 
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EnviroTO

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Interesting that the bridge segments they already installed are neither directly attached to the bridge over the CPR tracks nor the ones at the site where they will feed bridge segments into the gantry crane and launcher. There also isn't concrete pads at the side of the right-of-way poured to support the installation of those 6 remaining segments north of Dupont the way they installed the first six. I'm curious to see what comes next.
 

KevinT

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You are on the right track. The design of the crane and “launcher” can be seen here.
Presumably the support pads that were poured at Dupont and Wallace are placed where the gantry will be stationed to raise segments up to the “launcher”. Looks like the next stage of the work will be at the Wallace end, possibly with girders being placed northwards from there.

Thanks Paul, that link was super informative!

For those that don't want to click through, here are the slides of interest:

Girders1.png

Girders2.png
 

drum118

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April 26
The above posting explains why there is no north pier support for Wallace Ave. The pier support will be built after all the girders are in place as that area is needed to bring in the girders to be raise and move into place.

It also explains why the long foundation that will support the track to move the lift. Crew working on the track to anchor it down to the foundation. There are a number of small pads similar to the ones at Dupont in the corridor.

No idea why, but major scaffolding being built south of the 2nd set of girders.
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Allandale25

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