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Re: Soils and why fill a trestle? Not required reading.....

May 23, 2020 10:01AM avatar
Hi Timothy. Worthwhile repeating here is the Exporail article you had posted in an earlier thread. [www.exporail.org]

Pages 195 & 196 (only about 1 page total reading) is an Appendix A to the main article, and is a 1909 piece that covers a lot of the points you mention. It wouldn’t be possible to tamp the fill dumped between trestle bents, so it was allowed to settle naturally over the many years that the original timber trestle still supported the track.

Interestingly in Jerry’s photo above, there is a fellow dragging the dumped material down the slope. CPR used to have whole gangs of navvies doing this, to make the side slopes more gentle than even their natural angle of repose.

Also on their Mountain Creek trestle on Rogers Pass, the CPR didn’t even need to haul the fill. It was available just a little higher up the mountainside, so they washed it down hydraulically as a soupy slurry. This was then carried to the trestle in a wood flume, that could be directed to the desired locations between the bents. The growing mound of fill was retained by coffer cribbing, the water gradually filtered away, and a nicely compacted fill was left in its place. Eloquent!

Cheers,
Ralph
Subject Author Posted

RR Trestle Fill

Rich Muth May 20, 2020 04:28PM

Re: RR Trestle Fill Attachments

Jerry474 May 22, 2020 09:21AM

Re: RR Trestle Fill

Earl May 22, 2020 11:42AM

Re: RR Trestle Fill

Jimr260 May 22, 2020 04:55PM

Re: RR Trestle Fill

Jerry474 May 22, 2020 05:28PM

Re: RR Trestle Fill

Wayne Hoskin May 22, 2020 06:25PM

Re: RR Trestle Fill

GeorgeGaskill May 22, 2020 07:02PM

Soils and why fill a trestle? Not required reading.....

heatermason May 22, 2020 10:22PM

Re: Soils and why fill a trestle? Not required reading.....

tgbcvr May 23, 2020 10:01AM

Re: Soils and why fill a trestle? Not required reading.....

heatermason May 23, 2020 11:43AM

Hydraulic fill NNG

hank May 23, 2020 01:01PM

Re: Hydraulic fill NNG

tgbcvr May 23, 2020 03:40PM

Re: Hydraulic fill NNG

heatermason May 23, 2020 04:03PM

Re: Hydraulic fill NNG

hank May 23, 2020 05:04PM

Re: Hydraulic fill NNG

heatermason May 26, 2020 08:48AM

Re: Soils and why fill a trestle? Not required reading.....

Kelly Anderson May 26, 2020 09:27AM

Re: RR Trestle Fill Attachments

Jerry474 May 26, 2020 07:35AM



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