I-35 / US 30 Flyover Progress

[DeftOne]

It’s fairly common on larger bridges to utilize sleeves for anchor bolts. They were used on the Kate Shelly railroad bridge too for example.

Hope all is well with you!

JC

This is correct.

Iowa DOT prefers cast-in-place anchor bolts, but on larger bridges (especially those with long and/or curved spans) this can cause fit-up/tolerance issues.

Drilling-in and epoxying the anchor bolts after pouring the concrete is also generally acceptable, but can be problematic due to potential for the contractor to inadvertently cut through the pier cap reinforcing, which would be very bad. Long-span bridges lead to more heavily reinforced pier caps, which makes that potential for accidentally cutting reinforcing even greater since there's more rebar to hit.

Anchor bolt sleeves (wells) that are pre-set before pouring the concrete allow for larger girder and bearing placement tolerances, without the chance of accidentally cutting reinforcing (no drilling). The rebar can just be shifted as necessary to miss the anchor bolt sleeves.

Source: I'm a bridge engineer. ;-)

 

[DeftOne]

I'm going to guess there aren't an overabundance of companies who do that type of work in Iowa. The bids should be public record to find out who did bid it but it is a somewhat "specialized" project.

The bids for all Iowa DOT let projects are public record, regardless of complexity. The bids for this bridge can be found here:

https://www.bidx.com/ia/apparentbids?contid=85-0354-183

MINNOWA CONSTRUCTION,INC. $22,997,143.57
PETERSON CONTRACTORS INC. $24,045,616.71
CRAMER AND ASSOC., INC. $24,154,576.88
GODBERSEN-SMITH CONSTRUCTION CO. & SUBSID. $24,231,091.12
UNITED CONTRACTORS INC. AND SUBSIDIARIES $25,068,186.38
JENSEN CONSTRUCTION CO. $26,322,478.24
HAWKINS CONSTRUCTION CO. $27,634,353.36

 

[isu_oak]

I don't know if it was put up today, but there is now a steel beam connecting the southern ramp to the 1st pier.

 

[isufbcurt]

I don't know if it was put up today, but there is now a steel beam connecting the southern ramp to the 1st pier.

It's happening gif lol

 

[Tri4Cy]

I don't know if it was put up today, but there is now a steel beam connecting the southern ramp to the 1st pier.

Wasn't there when I drove past this morning. First pier looked much further along then the rest!

 

[JP4CY]

It's happening gif lol

Still exposed rebar in the second pier and they haven't jackhammered the third one (middle of 35) if they need to.

 

[isu_oak]

Drove by this morning and they're extending the beams over the second pillar.

Live shot from the DOT traffic cam:

 

[cyclonedave25]

Whats the estimated completion date?

 

[CYCLNST8]

Whats the estimated completion date?

 

[JP4CY]

Whats the estimated completion date?

Its going to be a while. They haven't filled in the center pier's jack hammered concrete yet.

 

[cyclonedave25]

 

[cycloner29]

Whats the estimated completion date?

 

[JP4CY]

I love how the front end just flies up.

 

[CYCLNST8]

O'Doyle rules!

 

[srjclone]

I love how the front end just flies up.

I was just thinking that. and then the "ramp" completely flattens for the back wheels.

Gotta love Speed

 

[cyfan92]

Whats the estimated completion date?

I've heard spring to summer 2019. Was supposed to be complete this fall...

 

[JP4CY]

I've heard spring to summer 2019. Was supposed to be complete this fall...

At the minimum they've lost months just because the top of the piers.
They've basically been going from pier to pier to fix it, weeks at a time, and the steel gets hoisted up in a day...

 

[urb1]

Still looks like the last pier is too short to me. But I'm not a civil engineer.

 

[cyclone83]

Whats the estimated completion date?

Wasn't the standard answer to Tom Hanks and Shelley Long in The Money Pit, "About 3 Weeks"

 

[Cyclones_R_GR8]

Wasn't the standard answer to Tom Hanks and Shelley Long in The Money Pit, "About 3 Weeks"