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Post by roadtrainer on Mar 30, 2013 17:03:59 GMT -8
The drilling subcontractor is Anderson Drilling this time (not Malcolm as in Phase 1) and they are using one of their SoilMec drill rigs, perhaps SoilMec SM400. expolinefan could find out next time exactly which drill rig is being used. Here is the Web site for Anderson Drilling. I explored their web site and found that they had a big drill that worked on the 'T-Rex' project in Denver, Co. and by reading i find that the same drills are here in drilling away at Venice/Robertson
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Post by joshuanickel on Mar 30, 2013 17:09:32 GMT -8
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Post by Gokhan on Mar 30, 2013 19:24:24 GMT -8
expolinefan says the drill rig is SoilMec R-312-200, capable of 118-ft-deep holes. Anderson Drilling has drill rigs capable of up to 300-ft-deep holes, which can swallow more than an entire three-car light-rail train: Anderson Drilling rotary drill rigs
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Post by roadtrainer on Mar 31, 2013 12:04:19 GMT -8
expolinefan says the drill rig is SoilMec R-312-200, capable of 118-ft-deep holes. Anderson Drilling has drill rigs capable of up to 300-ft-deep holes, which can swallow more than an entire three-car light-rail train: Anderson Drilling rotary drill rigs Are they working today or out collecting Easter eggs?
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Post by Gokhan on Mar 31, 2013 17:24:40 GMT -8
expolinefan says the drill rig is SoilMec R-312-200, capable of 118-ft-deep holes. Anderson Drilling has drill rigs capable of up to 300-ft-deep holes, which can swallow more than an entire three-car light-rail train: Anderson Drilling rotary drill rigs Are they working today or out collecting Easter eggs? Easter Bunny was reportedly helping them dig the hole # 16L.
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Post by Gokhan on Apr 1, 2013 10:56:44 GMT -8
The well 16L has now been dug and safely covered with steel plates and a forklift on top of them. Apparently no oil was found. Here is a close-up of the drill rig:
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Post by culvercitylocke on Apr 1, 2013 11:06:03 GMT -8
will they be drilling one hole a weekend for the next four weeks? or are they going to drill them rapidly starting the 16R drilling tonight or tomorrow? will the concrete pour for the columns be all at once or in stages and how long does it take for concrete to cure 100 feet below ground?
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Post by Gokhan on Apr 1, 2013 11:22:30 GMT -8
It takes about two days to drill one hole. I am guessing they will finish drilling in a few weeks.
I don't know if they will assemble the rebar cages on-site or somewhere else. They weigh more than 100,000 lb. Once they put the large cage in the hole, with a small above-ground cage on top of it, they can pour the concrete quickly. I don't think it takes more than a few days for the concrete to cure. Besides, there are no forms to remove. A few days later, they will make the above-ground forms around them with additional rebar. That will probably take another week or more. Then they need to pour the concrete above ground and wait for that to cure for about a week before they remove the forms for the above-ground column. I am guessing they will do them one at a time.
I am guessing about ten weeks for all columns to be ready -- sometime in mid-June. Then the really hard part comes -- building the superstructure above the columns, which should take about six months. The bridge should be completed by the end of the year.
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Post by roadtrainer on Apr 1, 2013 15:58:16 GMT -8
As Elmer fudd would say "Go Yabbitts!"
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Post by bobdavis on Apr 1, 2013 21:49:48 GMT -8
Here in the Arcadia area, we'd call it "digging for Lucky Baldwin's buried treasure".
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Post by darrell on Apr 2, 2013 11:43:26 GMT -8
The well 16L has now been dug and safely covered with steel plates and a forklift on top of them. Apparently no oil was found. Here is a close-up of the drill rig: Great photo from Dwight of that rig in action with mud flying last night (my crop, with his permission). He reports this 12-foot-diameter, 100-foot-deep hole for bent 16L was completed.
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Post by darrell on Apr 2, 2013 11:47:20 GMT -8
And two of mine from yesterday: [/quote] Falsework steel over Olympic [/quote] Another view of the beginning of the Overland substation, and a contrast with the wild-looking trees on the right
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Post by Gokhan on Apr 2, 2013 11:48:39 GMT -8
Apparently fossils were found last night: Video from expolinefan:
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Post by davebowman on Apr 4, 2013 8:52:12 GMT -8
It looks like they were pouring concrete this morning on the Olympic/Cloverfield bridge in Santa Monica. There were three of those big yellow crane thingys with what looked like hoses attached.
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Post by rubbertoe on Apr 4, 2013 9:26:38 GMT -8
It looks like they were pouring concrete this morning on the Olympic/Cloverfield bridge in Santa Monica. There were three of those big yellow crane thingys with what looked like hoses attached. The aerial pictures showed that about half the area was separated from the rest, to allow separate pours. This must be the first one. RT Sent from my DROID RAZR using proboards
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Post by culvercitylocke on Apr 4, 2013 9:58:25 GMT -8
Wasn't the Palms/National bridge/station supposed to be poured last week? Did we miss it with all the exciting drilling developments at Venice?
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Post by Gokhan on Apr 4, 2013 11:39:49 GMT -8
Wasn't the Palms/National bridge/station supposed to be poured last week? Did we miss it with all the exciting drilling developments at Venice? No, there is still a lot of concrete-form work to be done there. Perhaps in a couple of weeks or so. They are fast with the bridge supports and abutments but they aren't that fast with the bridge superstructures (what goes on top of abutments and columns).
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Post by Gokhan on Apr 4, 2013 11:47:30 GMT -8
They have now started to backfill the "Palms ramp." The rather long retaining wall for the ramp, which goes from National/Palms/Exposition to as far as one block west of the Bagley Ave at-grade crossing (to Cardiff Ave), was finished last week. It's 1,350-ft-long, corresponding to only about 1% grade, considering the height change is only about 15 ft. Normally the ramps have about 6% slope. I don't know why they decided to make it so gentle here. The retaining wall on the high section west of Palms/National/Exposition is mostly done except for a gap east of Clarington Ave.
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Post by Gokhan on Apr 4, 2013 11:51:19 GMT -8
According to a tip from the expolinefan, the large steel cage has been placed inside the hole. You can see the 12-ft-diameter, 100-ft-deep hole in my photo, covered with lumber. expolinefan was told that the next hole will be the one in the street corner. There will be another one next to the current hole and two more in the median of Venice. I expect the supports to be finished in about two to three months.
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Post by culvercitylocke on Apr 4, 2013 12:35:01 GMT -8
Wasn't the Palms/National bridge/station supposed to be poured last week? Did we miss it with all the exciting drilling developments at Venice? No, there is still a lot of concrete-form work to be done there. Perhaps in a couple of weeks or so. They are fast with the bridge supports and abutments but they aren't that fast with the bridge superstructures (what goes on top of abutments and columns). Ahh, okay, I was going off of this earlier post by Darrell Dwight reports that the big concrete pour for the National bridge is scheduled for March 27th.
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Post by Gokhan on Apr 4, 2013 14:38:22 GMT -8
No, there is still a lot of concrete-form work to be done there. Perhaps in a couple of weeks or so. They are fast with the bridge supports and abutments but they aren't that fast with the bridge superstructures (what goes on top of abutments and columns). Ahh, okay, I was going off of this earlier post by Darrell Dwight reports that the big concrete pour for the National bridge is scheduled for March 27th. You know what they say about people's estimation of when they will complete their task: multiply it by two and convert it into the next time unit. So, two days actually means four weeks. LOL Skanska/Rados seem to have been very good with meeting their deadlines though. However, construction supervisors have a tendency to get excited and underestimate how long the work will take. To give an idea, one construction supervisor had told me that Phase 1 would open on February 10, 2010. And when they say next month, that next month can mean the next month after an arbitrary month in the future.
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Post by joshuanickel on Apr 4, 2013 19:23:23 GMT -8
It looks like they were pouring concrete this morning on the Olympic/Cloverfield bridge in Santa Monica. There were three of those big yellow crane thingys with what looked like hoses attached. Going by there around 6:30 tonight, there was a concrete pumper there on the Southwest corner within the ROW with two concrete trucks backed up to it. On the bridge, there were a few men that I could see watching and guiding the hose.
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Post by Gokhan on Apr 5, 2013 12:25:12 GMT -8
Installation of the rebar cage by expolinefan:
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Post by rajacobs on Apr 5, 2013 12:58:13 GMT -8
Nice clip, but ...I don't think expolinefan was doing the installation!
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Post by culvercitylocke on Apr 6, 2013 13:34:02 GMT -8
Dwight has new photos up, from last night, and the captions say that the cement for last night's scheduled pour of 16L was rejected as too wet. So there was no concrete pour last night. It looks like the next bent to be drilled will be 17L tonight or tomorrow night.
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Post by roadtrainer on Apr 6, 2013 18:13:08 GMT -8
Dwight has new photos up, from last night, and the captions say that the cement for last night's scheduled pour of 16L was rejected as too wet. So there was no concrete pour last night. It looks like the next bent to be drilled will be 17L tonight or tomorrow night. I was wondering about the mass rejection of concrete from the Venice bridge pour and according to Dwight 14 truck loads were rejected. So I looked it up on Wikipedia about too much water : Too much water will result in segregation of the sand and aggregate components from the cement paste. Also, water that is not consumed by the hydration reaction may leave the concrete as it hardens, resulting in microscopic pores(bleeding) that will reduce the final strength of the concrete. A mix with too much water will experience more shrinkage as the excess water leaves, resulting in internal cracks and visible fractures (particularly around inside corners) which again will reduce the final strength. Perhaps too much water in the concrete caused controversy in the Compton Creek bridge on the Blue Line ( the bridge in question just south of Greenleaf Ave.) and the Gold line China town station having cracks in the bents
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Post by Gokhan on Apr 8, 2013 13:55:50 GMT -8
Pictures from Sunday, except for the last one. Palms Park got new fences by the Parks Department, about 8-ft-high. I believe Expo will also fence the tracks with 6-ft-high fences: They are also putting new lawns for a soccer field and softball field: Looking from the fence into the Northvale trench: Kitties can access under the fence but no dogs or coyotes: Lunch time: "] Looking southeast toward the Palms Overhead tunnel: Looking northwest: Detail of the electrical-conduit (train-communications) work: What used to be the Overland Avenue Elementary School parking lot is the location of the Expo traction power substation (TPSS), directly across the school at Northvale Rd and Overland Ave. Looking toward Overland Ave: Overland Ave on the right: Northvale Rd on the left: Looking south at Overland Ave. An old train-signal/gate pole from the Pacific Electric / Southern Pacific era is still standing: Looking west at Overland Ave: Looking west from Overland Ave. Sound walls seem to be either 7 ft or 8 ft high from the top of the rail (= grade-crossing level). This city-owned about 100-ft-wide empty area on the north side of the right-of-way between Overland and Westwood will be a daylighted creek, with the storm-drain water from Overland Ave pumped into it. Finally this is the condition of the construction at Venice/Robertson as of today. The large steel cage underground and the small steel cage above ground are in place, waiting for concrete pumping inside the hole in the ground. The drill has moved to the southwest corner of Venice/Robertson and that's where the second hole will be drilled.
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Post by culvercitylocke on Apr 8, 2013 20:16:29 GMT -8
Dwight has lots of new progress pictures up (except for the Cloverfield/Olympic Bridge). There are a lot of especially good photos of the falsework over Sepulveda (will the station be over the street like La Cienega?), where they apparently don't have to move utilities to do work, since there are power lines swooping over the construction.
The bents at Pico are done, except for the mid road ones, it looks like they might be starting prep work in the area under the 405.
and the cement pump was back at venice tonight. hope this batch isnt too wet as well.
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Post by bzcat on Apr 9, 2013 10:55:18 GMT -8
Sepulveda Station will be west of Sepulveda Blvd, not over the road like La Cienega.
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Post by joshuanickel on Apr 9, 2013 11:03:22 GMT -8
Sepulveda Station will be west of Sepulveda Blvd, not over the road like La Cienega. The station at Sepulveda will be over the street as will Bundy. Here is a drawing of the Sepulveda station from the expo website. Attachments:
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