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Post by metrocenter on Oct 29, 2018 10:10:17 GMT -8
Congress is considering a policy which would restrict federal funds being spent to purchase rail vehicles from China. I wonder how this would affect already-signed contracts. Hopefully this will not affect the multi-phase Purple Line extension (or any of our other projects). The proposed legislation is written to primarily affect CRRC. Metro's only business with CRRC is for its next generation of Red/Purple Line vehicles. That last part (which I italicized) suggests that the legislation would not affect the initial order (of 64 cars), but would affect the purchase options (of up to 218 more cars). |
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Post by numble on Oct 31, 2018 8:44:21 GMT -8
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Post by bzzzt on Oct 31, 2018 9:15:53 GMT -8
What are the big tubes for? Pipes? Pistons?
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Post by numble on Oct 31, 2018 15:39:08 GMT -8
The first TBM, Soyeon, has tunneled 414 feet so far.
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Post by culvercitylocke on Oct 31, 2018 19:11:12 GMT -8
The first TBM, Soyeon, has tunneled 414 feet so far. 11-12 meters per day, a bit slow but should speed up after the other has launched |
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Post by numble on Nov 2, 2018 18:27:34 GMT -8
So the following summarizes the tunneling schedule for all three sections (from the data I could find): - Section 1 - Oct 2018 to Oct 2020
- Section 2 - Oct 2019 to Apr 2021
- Section 3 - May 2020 to Aug 2021
And btw, that will mean overlap where six TBMs will be tunneling simultaneously on the purple line. Thinking corporate strategy for a moment, there are a couple conclusions to be teased out: The phase one purple approach: Old and Slow, six years from FEIR approval to TBM starting is not going to hack it going forward. The big firms like Tutor and the phase three firm are thinking forward, they know there is 140 billion in rail projects invested in LA in the coming decades inclusive of the Sepulveda pass mega tunnel project, and they also know there is a super mega gigantic insane tunneling project in the 23 miles of tunnels for HSR. So the innovative and bold approaches we see with aggressive timetables for phase 2 and phase 3 are NOT really about meeting LAs olympics acceleration goals, they're about demonstrating the capabilities of these corporations for the future projects as well. For instance if the phase 3 tunnel contractor can demonstrate a new to LA technique that could arguably be faster, cheaper and more reliable. Being able to say, we can replicate this process on sepulveda pass, we'll start tunneling within a year of FEIR and NEPA approval. imagine if the phase 3 technique had been utiliized for phase 1, we'd have had a Launch box constructed at Wilshire / san vicente in 2013, and began tunneling by 2014 at the latest, the TBMs would have finished in 2016-2017, and we'd currently be looking at most of the inside the tunnel construction being finalized right now, and the only wait would be on the laggard station palace construction. Likewise phase 2 demonstrates an appreciation for speed as a solution to tricky political situations. If Tutor were willing to wait to start tunneling on the phase 1 schedule, we'd be looking at tunneling starting in 2021. That is a lot of time for political opposition to grow or for political headwinds to change. Tutor can be saying, look, we'll launch the TBMs for the longest tunnel reach of the HSR within a year of the FEIR and NEPA certs. we won't wait around for a b c d e f g h i j k l m n o p q r s. We'll start at T and we'll do the other steps concurrently, but they're irrelevant to the six-seven years of tunneling anyway, its nonsense to take the purple phase one approach of doing them all first when there's a better way. Also, the purple phase 3 approach is also the same approach as Large diameter single bore tunneling. By introducing this approach, and proving it works, they make it more likely that single bore could be used for future projects in los angeles. Now they can say, "that thing we did for phase three, we can do it faster and cheaper with less street disruption if we do single bore. And both phase 2 and phase 3 's aggressive approach of tunneling first seems to have imported the best lessons from global tunneling projects that have proven this the most cost effective approach to tunneling. And of course, I would argue these big corporations are VERY worried about the Boring Company getting any of the Los Angeles contracts, particularly after Boring swiped the big Chicago contract from them. That means they're trying to demonstrate vision, boldness and strategic innovation in how they approach and execute contracts. So we get stuff like the phase three approach, which is under appreciated for being a radically new to los angeles approach to tunnel construction! Tutor is also the tunnels contractor for Section 3. I looked at their bid document for Section 2, it looks like they will use the “continuous tunnel before station excavation, break through the tunnel for the station afterwards” approach for Section 2 as well. www.dropbox.com/s/o4pfvlatvjlqhuc/TPOGJV_Vol-III_Technical_Approach.pdf?dl=0“Sacrificial precast tunnel liner segments to be removed” |
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Post by bzcat on Nov 5, 2018 15:53:55 GMT -8
So basically, phase 2&3 construction staging is multi-linear - meaning that tunneling is taking place before or at the same time as other constructions. Whereas phase 1, it was linear: station box first, then tunneling between the stations.
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Post by numble on Nov 6, 2018 15:20:38 GMT -8
Soyeon has made it to the Coffee Bean & Tea Leaf:
I guess that means 5115 Wilshire Blvd, just past Orange Dr.
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Post by numble on Nov 8, 2018 8:24:26 GMT -8
Soyeon has made it to the Coffee Bean & Tea Leaf: I guess that means 5115 Wilshire Blvd, just past Orange Dr. It translates to about 450 feet: |
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Post by numble on Nov 9, 2018 7:57:53 GMT -8
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Post by culvercitylocke on Nov 9, 2018 16:25:41 GMT -8
I went through it yesterday it’s very detailed and good stuff also indicates phase two tunneling starts in June 2019 |
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Post by numble on Nov 14, 2018 13:54:30 GMT -8
Soyeon has tunneled 646 feet.
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Post by culvercitylocke on Nov 14, 2018 14:16:25 GMT -8
Soyeon has tunneled 646 feet. For twenty days of work that's about 30 feet per day (10 meters a day) Elsie should be launching soon. I wonder if they're waiting until after thanksgiving to avoid holiday pay and a short week for her crew. |
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Post by numble on Nov 19, 2018 15:40:39 GMT -8
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Post by numble on Nov 20, 2018 22:21:24 GMT -8
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Post by numble on Nov 21, 2018 10:17:18 GMT -8
Soyeon has tunneled 811 feet so far.
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Post by metrocenter on Nov 21, 2018 14:09:55 GMT -8
The historic Pickle Works building, built in 1888, has had a fire and is now facing demolition. This building survived the widening of the First Street Bridge for the Gold Line, and it was slated for further modification to accommodate the expansion of the Purple/Red Line yards in the Arts District. A fire two weeks ago (9 November) ripped through the industrial structure. The building, once prized by preservationists, is now considered an immediate hazard to health and safety, and will likely be torn down. |
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Post by fissure on Nov 21, 2018 21:03:55 GMT -8
I can't wait for the tinfoil hatters to start saying Metro lit the fire to work around community opposition to demolishing part of the building.
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Post by numble on Nov 26, 2018 23:06:28 GMT -8
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Post by culvercitylocke on Nov 28, 2018 12:56:47 GMT -8
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Post by culvercitylocke on Dec 6, 2018 15:09:46 GMT -8
Elsie has started and has mined 30 feet. Soyeon has mined 1226 feet, 12%, and is under Wiltshire/highland intersection right now .
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Post by numble on Dec 24, 2018 15:25:48 GMT -8
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Post by numble on Dec 26, 2018 10:28:51 GMT -8
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Post by jahanes on Dec 29, 2018 19:57:24 GMT -8
The pace of construction on the Purple Line is surprising... and casts suspicion on the laggard progress of the crenshaw and regional connector projects. Skansa/Traylor and Walsh/Shea need to step it up to get contracts in the future.
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Post by culvercitylocke on Dec 29, 2018 20:24:15 GMT -8
The pace of construction on the Purple Line is surprising... and casts suspicion on the laggard progress of the crenshaw and regional connector projects. Skansa/Traylor and Walsh/Shea need to step it up to get contracts in the future. Not necessarily, the critical path of the phase two purple remains the century city station, and it will remain the critical element for almost the entire duration of the project, and they haven’t even started on it yet, sure they may be able to finish everything else as Crenshaw has, but like Crenshaw, six years from now they will still be struggling with the century city station, and limping along at a snails pace on the station as it will be one of the only things left in the project. Put another way, the phase three tunneling will reach century City before they have even excavated / built the floor of century City station enough to receive the tbms, requiring them to disassemble the tbm within the tunnel and remove all the pieces of the tbm at the VA over a period of months, that’s how behind they are on century city, even if there is an appearance of sped at this point. |
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Post by bzcat on Jan 2, 2019 11:44:05 GMT -8
Purple line has been on schedule because tunneling is the least complicated part of the process. Like culvercity locke mentioned, the Century City station is going to be the one to watch (the yard was the part of Crenshaw line that lagged behind).
It's quite worrisome that we have not even began the site prep for Century City. The utility relocation has taken way longer than it should.
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Post by culvercitylocke on Jan 2, 2019 15:58:34 GMT -8
Purple line has been on schedule because tunneling is the least complicated part of the process. Like culvercity locke mentioned, the Century City station is going to be the one to watch (the yard was the part of Crenshaw line that lagged behind). It's quite worrisome that we have not even began the site prep for Century City. The utility relocation has taken way longer than it should. To be fair they had two years of utility relocation scheduled for aT&T—the most for any station—I don’t think they’ve reached the way longer point yet, they’re still deep in the scheduled utility relocation. |
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Post by numble on Jan 8, 2019 19:10:09 GMT -8
Soyeon has crossed Keniston Ave. and Elsie has passed Citrus Ave.
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Post by culvercitylocke on Jan 9, 2019 11:00:56 GMT -8
Soyeon has crossed Keniston Ave. and Elsie has passed Citrus Ave. fyi, the station box edge is just past orange, so this corresponds to tunneling progress of 700 and 2100 feet, respectively. for about 20 days of work, that's about 35 ft per day. slightly faster than soyeon, which mined only about 30 ft per day it's first twenty days On the other hand at about 55-60 days of tunneling for soyeon, they're at 35-38 ft per day, which is a significant pace improvement in december (when concurrant tunneling with soyeon began. reach one is 9670 and 70 feet so soyeon is about 22% of the way there! |
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Post by numble on Jan 9, 2019 16:17:36 GMT -8
Soyeon has crossed Keniston Ave. and Elsie has passed Citrus Ave. fyi, the station box edge is just past orange, so this corresponds to tunneling progress of 700 and 2100 feet, respectively. for about 20 days of work, that's about 35 ft per day. slightly faster than soyeon, which mined only about 30 ft per day it's first twenty days On the other hand at about 55-60 days of tunneling for soyeon, they're at 35-38 ft per day, which is a significant pace improvement in december (when concurrant tunneling with soyeon began. reach one is 9670 and 70 feet so soyeon is about 22% of the way there! There are more details in the January Purple Line newsletter that was just released: bit.ly/2VFZGZn |
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