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Post by numble on Sept 26, 2018 21:27:21 GMT -8
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Post by culvercitylocke on Sept 27, 2018 14:42:40 GMT -8
that says start of tunneling for the first TBM was supposed to be on 9/25, I wonder why that was delayed. |
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Post by culvercitylocke on Sept 27, 2018 14:48:29 GMT -8
and section two says that they take delivery of the section two TBMS on 9/28/18 |
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Post by culvercitylocke on Oct 4, 2018 9:47:39 GMT -8
Utility relocation at Rodeo scheduled to be concluded in November.
Demolition of ACE gallery delayed to January because they found lead paint behind concrete and have to wait on remediation before demolishing.
Now we're at six months of delays for the ACE gallery demolition, presumably this won't push the entire rest of the schedule? but it is their construction staging area, and I wonder if they will be able to start piling on time in January without it.
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Post by numble on Oct 11, 2018 22:02:20 GMT -8
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Post by culvercitylocke on Oct 12, 2018 12:25:59 GMT -8
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Post by numble on Oct 12, 2018 14:50:02 GMT -8
So just guessing here, but in order to do that they’d just tunnel nonstop to century city and the stations would excavate around the tunnels and remove those sections? Here is the Purple Line Section 3 Construction Approach Plan, prepared in March 2018: www.dropbox.com/s/0pfz2nslxynje18/Section%203%20Construction%20Approach%20Plan.pdf?dl=0Note the estimated Notice to Proceed date of June 2018 has been delayed and still has not occurred due to the delay in the federal funding and the FTA requirements. They do not allow Metro to issue the Notice to Proceed until the FTA completes an environmental review of the project. The Notice to Proceed is estimated to be before December 3, 2018, according to this board box report: boardarchives.metro.net/BoardBox/2018/180920_LONP_Update.pdf |
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Post by culvercitylocke on Oct 16, 2018 10:52:57 GMT -8
Tunneling began yesterday.
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Post by masonite on Oct 16, 2018 10:55:13 GMT -8
that says start of tunneling for the first TBM was supposed to be on 9/25, I wonder why that was delayed. Per Metro they finally started the TBM actually tunneling on Monday. |
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Post by culvercitylocke on Oct 16, 2018 12:01:32 GMT -8
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Post by numble on Oct 16, 2018 16:58:53 GMT -8
The TBM says it’s going 4 inches per minute. That’s a good speed, right?
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Post by culvercitylocke on Oct 16, 2018 21:12:38 GMT -8
If true that would be 60 meters a day or four times the general speed of tunneling. That would only be about 105ish days of tunneling to go the 6.2 km
Probably the machine just moves a bit faster when it’s first starting off, once fully in the tunnel it will Probably slow to about 15-20 meters a day. The Regional connector tunnels went faster than 15 iirc
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Post by metrocenter on Oct 18, 2018 12:07:52 GMT -8
Its too bad they aren't heading westward, so they could just drive them all the way to Westwood, turn north, and tunnel to the Valley!
(I know, its not possible. But I can dream, right???)
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Post by culvercitylocke on Oct 19, 2018 14:53:22 GMT -8
The TBM says it’s going 4 inches per minute. That’s a good speed, right? i don't have the twitters, but I wonder if people who do have them could ask for weekly updates on how far they've gone. The Alaskan Way Viaduct used to post weekly progress updates, which was interesting and informative to watch as they built the tunnel. |
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Post by numble on Oct 19, 2018 16:13:21 GMT -8
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Post by culvercitylocke on Oct 19, 2018 16:49:30 GMT -8
Aren’t they scheduled to start tunneling as soon as BHHS is on summer break in 2019? Piles and decking aren’t supposed to take very long for the launch box and maybe it’s a more shallow station so they don’t have to excavate as deep? Or if the lunch box isn’t going to be part of the station structure they don’t have to worry about building a sandwich floor etc in order to lunch the TBM? Regardless they want to get the tunnels under BHHS done ASAP. |
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Post by numble on Oct 20, 2018 3:45:36 GMT -8
Aren’t they scheduled to start tunneling as soon as BHHS is on summer break in 2019? Piles and decking aren’t supposed to take very long for the launch box and maybe it’s a more shallow station so they don’t have to excavate as deep? Or if the lunch box isn’t going to be part of the station structure they don’t have to worry about building a sandwich floor etc in order to lunch the TBM? Regardless they want to get the tunnels under BHHS done ASAP. Just seems things are moving faster than with Segment 1, and they made a big deal about the TBM delivery for Segment 1. |
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Post by culvercitylocke on Oct 20, 2018 10:09:34 GMT -8
Aren’t they scheduled to start tunneling as soon as BHHS is on summer break in 2019? Piles and decking aren’t supposed to take very long for the launch box and maybe it’s a more shallow station so they don’t have to excavate as deep? Or if the lunch box isn’t going to be part of the station structure they don’t have to worry about building a sandwich floor etc in order to lunch the TBM? Regardless they want to get the tunnels under BHHS done ASAP. Just seems things are moving faster than with Segment 1, and they made a big deal about the TBM delivery for Segment 1. I think they want to keep section two tunneling as quiet as possible until they’ve tunneled east beyond the BHHS tennis courts |
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Post by numble on Oct 22, 2018 9:14:55 GMT -8
The TBM says it’s going 4 inches per minute. That’s a good speed, right? i don't have the twitters, but I wonder if people who do have them could ask for weekly updates on how far they've gone. The Alaskan Way Viaduct used to post weekly progress updates, which was interesting and informative to watch as they built the tunnel. I used my twitters to talk to the TBMs, and they have a positive reply: |
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Post by culvercitylocke on Oct 22, 2018 10:26:07 GMT -8
i don't have the twitters, but I wonder if people who do have them could ask for weekly updates on how far they've gone. The Alaskan Way Viaduct used to post weekly progress updates, which was interesting and informative to watch as they built the tunnel. I used my twitters to talk to the TBMs, and they have a positive reply: Thanks! They posted an update this morning that they have mined about 62 feet, at three work days (presuming they’re only working five days a week) that’s about twenty feet a day or six meters per day, so about 40% their expected rate once they get fully going. They also said their first planned maintenance stop for the end of reach one is at 9000 feet about half way I think. |
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Post by metrocenter on Oct 23, 2018 11:30:09 GMT -8
The TBM says it’s going 4 inches per minute. That’s a good speed, right? My wife says that's fine. LOL |
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Post by metrocenter on Oct 23, 2018 11:45:11 GMT -8
Section 2 is 11.58% completed. The 'planned' construction progress for this point in time was 0.39%. But as you point out, actual progress is at 11.58%. They are building at a very nice clip! Interestingly, they say they have begun TBM delivery to the staging area, and there is a photo of the TBM on page 10 of the pdf (page 7 if going by page numbers on the report). On page 11, the report says Section 2 TBM installation will take place Q3 2019. They are still building the tunnel launch box. (Just think: next fall, all those poor (LOL) schoolchildren and their teachers will be sinking into the ground!) It wouldn't surprise me at all if they decide to skip the Section 2 'naming contest' and launch ceremony. Metro is going to want to keep this segment very low profile. |
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Post by metrocenter on Oct 25, 2018 15:31:39 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
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Post by culvercitylocke on Oct 25, 2018 17:37:20 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
They will never start tunneling for section two except during late June of any year. They will want to finish BHHS when the students are not in session. |
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Post by numble on Oct 25, 2018 22:47:18 GMT -8
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Post by metrocenter on Oct 26, 2018 7:53:44 GMT -8
In Tutor Perini's latest earnings call, the CEO said they hoped to start tunneling by June 2019 Even better! (I was just listing the dates on the construction schedules and/or public presentations.) |
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Post by culvercitylocke on Oct 26, 2018 10:21:13 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! |
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Post by numble on Oct 26, 2018 11:55:09 GMT -8
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Post by metrocenter on Oct 29, 2018 9:15:43 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). |
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Post by numble on Oct 29, 2018 9:46:02 GMT -8
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