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Retaining Wall

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Posted by PVT Kanaka on Monday, September 11, 2017 2:42 AM

To that end, as we were polishing some nasty rail joints, my oldest 0-2-0 said:

"So if we had a live steam engine, we wouldn't have to do this, would we?"

Good....Gooooood......My young...apprentice!

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Posted by ttrigg on Friday, September 8, 2017 3:28 AM

PVT Kanaka

 

 
ttrigg

I see you have an occurance that I never had to contend with. A fleet of 0-2-0's can easily cause movement unexpected. 

 

 

 

 

Those 0-2-0s are part of the challenge, part of the motivation, and most of the joy of this project!

 

Most hardy agreement. You & I (and others) are the 'now' of the hobby, the little ones are the future.

Tom Trigg

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Posted by PVT Kanaka on Friday, September 8, 2017 12:57 AM

ttrigg

I see you have an occurance that I never had to contend with. A fleet of 0-2-0's can easily cause movement unexpected. 

 

 

Those 0-2-0s are part of the challenge, part of the motivation, and most of the joy of this project!

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Posted by ttrigg on Monday, September 4, 2017 2:35 AM

I see you have an occurance that I never had to contend with. A fleet of 0-2-0's can easily cause movement unexpected. 

Tom Trigg

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Posted by PVT Kanaka on Monday, September 4, 2017 2:06 AM

Tom,

I placed the second wall today. I found, also, that the first wall had begun to lean forward a bit due to the crew climbing up over the retaining wall and into the garden to access the guppy pond along this part of the line. Since, I was digging, anyway, I just straightened it out. I should have set it deeper, but I have a feeling this will be a recurring repair.

We will get to the concrete wing walls eventually, and will update this post when that phase of the project begins. Tomorrow,however, the dive boat calls, and I must answer!

Aloha!

Eric

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Posted by PVT Kanaka on Thursday, August 24, 2017 6:21 PM

ttrigg

Just remember that there will come a time when you are the one to share experiences, what worked and what didn't.

 

Tom, thanks for your kind words!  I look forward to that day!

In the meantime, my oldest daughter and I took advantage of being laid low by a minor 'flu to start in on the next wall.  It is all scribed and ready for the India ink.  All stop as we look for toothpicks!

 

Aloha,

Eric

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Posted by ttrigg on Monday, August 21, 2017 2:46 AM

Just remember that there will come a time when you are the one to share experiences, what worked and what didn't.

Tom Trigg

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Posted by PVT Kanaka on Monday, August 21, 2017 12:17 AM

Tom,

The wall went in this weekend. The first photo shows the top-down shot as I trenched out its location:

Then we have the wall in place.  My helpful PLAYMOBIL crew agains provides perspective:

From a visual standpoint, this is a HUGE improvement.  Operationally, since I jostled all the joints on my 12" and 24" section track, things were, for the moment, touchy.  Naturally, we had visitors...

I will have to make one more wall to complete the lengthe of this project.  The concrete elements are on hold as I make my annual inspection and repair of our window frames.

This is HUGE.  It really gives the impression that the railroad sits on the highpoint of a floodplain.  Thanks again for letting me bounce some ideas off you!

Aloha,

Eric

 

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Posted by PVT Kanaka on Tuesday, August 15, 2017 12:30 AM

Ah.  Ink first, then stain.  Live and learn!  We will get this first wall in place then by this weekend, which will let us proceed to the wing wall and culvert project, hopefully brining this part of the operation to a conclusion.  

We'll put the lessons learned into the next timber wall, which we can tackle as wing walls and culverts start to come out of the mold.  Should carry us through the summer.

Thanks as always, Tom!

- Eric

 

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Posted by ttrigg on Sunday, August 13, 2017 9:39 PM

India Ink should be applyed to the raw wood. It is water based solution and will soak deep into the wood. Over time as moisture seeps through from the backside of the wood the ink will migrate back to the surface. Stains are oil based and will seal the ink in place. Suggestion; put the wood header board in place and let it age 4~6 weeks to allow the VOCs to evaporate then apply the ink, cover with a thin coat of the very lightest stain you have after the ink has dried for a couple days. The real effect you are trying to achieve will happen in about 2~4 years as the color will change to 'barn wood grey'.

 

As for the 're-bar', should not be needed. If it is the type of sword I'm thinking about, it may introduce a 'sheer plane' (think miniature earthquake fault zone) that will allow, and possibly accelerate, road bed materials to move. Not sure what you mean "stone and dirt". If you build up the roadbed with shoulders 1/2~3/4 inch wider than the ends of the ties, you should be good to go. After the first rain you will see some washout, not a big concern, just add more ballast. As the elevated roadbed ages it will firm up and become more stable. If you have wing walls for the head wall it should stay in place just fine unless hit by an 0-5-0.

Tom Trigg

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Posted by PVT Kanaka on Sunday, August 13, 2017 7:59 PM

Tom,

The wall (and a good portion of my girls!) is stained as you described.  The photo is pretty bad due to the sun, but multiple tones are visible.  Prior to staining, I did deepen my grooves with my Dremel (love that thing!), setting it at a low speed.  The India ink is on hand, but I want to see how everything looks when it dries before I apply it. I used a pretty dark stain as a base, so I may have inadvertently obviated that step!  I should be able to remove my not-so-deccartive concrete shards by the end of the week, shoring up a good  section of the run with this retaining wall.  

Oh, I shattered two swords at my fencing club, which provides some high tensile "rebar" to brace this new "wall."  Should I do that, or will the dirt and stone fill be sufficient to hold the "wall" in place?

Thanks as always, and have great week!

Aloha,

Eric

P.S. I will, if nothing else, have a photo of the project after it is installed.

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Posted by PVT Kanaka on Tuesday, August 8, 2017 2:33 AM
Alas, Pele vents her frustrations from Kilauea in the form of a lava flow! Ash is atypical in any meaningful amount on O'ahu. Neat, neat idea though!
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Posted by ttrigg on Monday, August 7, 2017 2:01 AM

PVT Kanaka
I am going to hold on that technique, other than the mold, until I need the mix for a household repair...something that appears almost as fast as mortar mix fails in the tropics! Aloha, Eric 

Eric, Do you have access to volcano ash? If so, do like the Romans did, add 1 part ash to 4 parts mortar mix. Better yet, mix equal parts cement and ash. It beefs up the water resistance of cement. Some of their bridge piers poured under water are still in use to this day. The ash/cement mix is extra light and extra, extra strong. Rome has several domed buildings that have been standing for over two thousand years.

Tom Trigg

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Posted by PVT Kanaka on Monday, August 7, 2017 1:38 AM

Tom,

Scored a board, using the ties of my LGB track to size the lines.  Figured I'd make the wall look like it was made of railroad ties.  I did  not score the bottom two inches, as the wood splintered when my father-in-law cut it down, it will be hidden, anways, and as it is a plywood, not solidwood, I doubt this wall will live to see the garden settle a full 6", anyway!  I will see if I can get this stained over the week.

I also bough the material for the culverts and forms, so that I have the forms on hand for the next phase of the project, which will be to shore up some random places about the garden, possibly leading to some scenic developmeent as we go.

 

FYI, the concrete walls and wings are very similar to stream crossing points along the Oahu Rail & Land mainline my oldest daughter and I found up beyond Mokuleia, so I could see these forms doubling for some short, basic bridges, too.  In 25-30 years, we may have a real representation of a Hawai'i sugar cane road after all!

Thanks again for the tips, and I will keep you posted with the progress!

Have a great week!

Aloha, 
Eric

 

 

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Posted by PVT Kanaka on Sunday, July 30, 2017 8:52 PM
Tom, Stain is on hand, and the hardware store has the appropriate bits of scrap wood. I am going to see if I can get the 1x6 for free this week before commencing OPERATION RETAINING wall. Likewise, all material on hand or sourced for the culverts, but, as concrete and mortar mix has a short half life in the tropics, I am going to hold on that technique, other than the mold, until I need the mix for a household repair...something that appears almost as fast as mortar mix fails in the tropics! Aloha, Eric
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Posted by PVT Kanaka on Friday, July 28, 2017 9:24 PM

HUZZAH!!!  Semi-success!  I had the same thing when I was working wiht this, that it would open and try to save the picture to my drive.  As you said, strange...

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Posted by ttrigg on Friday, July 28, 2017 8:15 PM

Only the one pic shows up. There is one thing a bit strange. Normally clicking on the pic opens it up in a new window. A click saves it to my hard drive. "Open in new tab, open in new window also saves to har drive. Strange.

Tom Trigg

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Posted by smcgill on Friday, July 28, 2017 7:32 AM

I'm just seeing the one pic! Thumbs Up

Mischief

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Posted by PVT Kanaka on Friday, July 28, 2017 12:52 AM

 Still trying to get the blasted photo to post...

 

Note I did have to use the "insert image button," and I hope it does not lead to my whole OneDrive (Opening the picture on CINCHOUSE's computer only led to her OneDrive).  Anyhow...

Now you can see the degree of settling in terms of depth and length.  As mentioned, I am going to use the scored board method here.  Assuming this photo does not give everyone access to our family album, I'll update this when I get underway with the project.

Aloha,

Eric

 

 

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Posted by PVT Kanaka on Wednesday, July 26, 2017 2:56 AM
Tom, No worries about the verbosity. Both approaches are within my skill and toolkit. I think the scored board will work in the longer area, solving the immediate problem, and the form is something I can hold in reserve for troubleshooting and spot repairs! Also, thanks for the OneDrive tip. It is late, so I will try to monkey with it again tomorrow. Aloha! Eric
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Posted by ttrigg on Tuesday, July 25, 2017 7:26 PM

PVT Kanaka

Tom,

Allegedly using the link from OneDrive will not give the world access to my family album; unfortunately, despite what their help desk said, that does not appear to be the case...

 

Have a look at my "interesting bash" post then read the instructions in second post.

Tom Trigg

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Posted by ttrigg on Tuesday, July 25, 2017 5:59 AM

Quick hint for culvert construction. Timber is quick, easy and commonly used. 'Concrete' (mortar mix); Build a multi use form. Use a piece of 1/2 inch or 3/4 inch plywood as a base. Drill a hole through the plywood very slightly larger than the diameter of the pipe you are using. Use 1/2 x 1/2 wood strips to make the outline of the header wall and wing walls. Lay the wood strips out to form the header wall, a rectangular shape of about 2 1/2 inches tall and 4 inches wide. The 'pipe hole' should be about 1/2 inch above the bottom of the headwall. WingWalls: 4 inches across the bottom, 2 1/2 inch tall on one side and 1 inch tall on the other side. CAUTION: wood will wick away the water in the motar mix too fast for the motar to properly set up. Use some GAA (grease automotive and aircraft) and coat the wood with a thin layer making sure to work it into the joints between the plywood and wood stips to fill any holes and gaps. Put a good coating in the pipe hole, but not on the pipe. Insert the pipe and fill with mortar mix, cover with wet paper towle and set aside for a day or two. Before inserting the pipe use some 40~60 grit sandpaper and spin the pipe to put some small grooving in the pipe. The grooves will help the motar mix to hold the pipe. I've had some problems using white lithium grease and prefer the regular stuff. The grease works well as a release agent when removing the walls from the forms. After the mortar has well setup, gently turn the form upside down and the pieces should fall out with ease. I usually break about 1 in 10 of my 'walls', just pour another as needed. Since wingwalls normally attach the the header wall at an angle there are two possible ways to attach. (1) Lay some coarse sandpaper on a flat surface and gently remove a little bit from the back corner so you get the angle you want. Glue the walls together with some adheseve or a bit of wet mortar.  (2) Without sanding the edge, just position the wingwalls in place and fill the gap with mortar mix. If you want a double pipe culvert just make the headwall form a bit wider to allow for the second pipe. 

The 'real fun' begins when the culvert is seen from the other side. Before attaching the wingwalls I stand the pipe back into the form with some spacer wood to support the cured headerwall above the form at the needed height. Take care to ensure that everything is aligned so that the headers match. I normally attach the wingwalls after the pipe is in place and use the backfill to hold everything in alignment.

When placing the pipe and headwalls the pipe should be at ground level. After everything has been set in place come back and remove a bit of the fill so there is a small hole in the ground at the pipe, normal erosion from running water as it comes out of the pipe.

How to 'cheat' with timber construction. Instead of gluing up a wall of individual timbers I take a piece of 1x6, run it through the table saw so it ends up about half inch thick. On the "clean' side I scribe in the individual timbers with a metal ruler and a sharp razor knife. I use several different stains to color the individual timbers. 2 cans of stain = 2 colors, mix 50/50 for third color, mix 3 parts 1 part gives two more colors. Use a toothpick to paint in the grooves with black india ink.

Sorry about the 'maximum verbosity', but when I get going I just cannot stop.

Tom Trigg

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Posted by PVT Kanaka on Monday, July 24, 2017 11:58 PM

Tom,

Allegedly using the link from OneDrive will not give the world access to my family album; unfortunately, despite what their help desk said, that does not appear to be the case...

Anyway, I think the culvert approach will work best based on some internet searches, my available time, and my available tools and talent.  As silly as it seems, I just couldn't think of a good way to make the wings around the pipe. My tools include a good electric drill, my Dremel, a circular saw, and various gardening tools. Making a form into which I could pour concrete would be at the outer limit of my tools and capabilities, I would think. I was thinking of basically drilling into hollow tile, adding the pipe, the using construction glue to add a wooden top and wings.  The theory being that I could always lift out the whole assembly, back fill the hole, and reposition it if I had to.  Alternatively, what about timber cribbing?  I could cut some timbers to standard sizes, stack them into squares or rectangles, and drill holes in the corners for a screw to hold the lot together.  Then just backfill with the gravel and, hopefully, have a workable solution.

Anyway, hope this helps to frame the problem better.  I'll keep dickering with the photo link issue, and hopefully be better able to frame this issue soon!

Aloha,

Eric

 

 

 

 

 

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Posted by PVT Kanaka on Sunday, July 23, 2017 8:55 PM
Tom, As I chew on all this, I think I am going to have to forgo the bridge idea. Realistic assessment of available time indicates this would take trains out of operation for months. Also, as there is at least a theoretical plan to turn our guppy pond into a proper water feature, a project of this nature could be premature. I like the culvert-and-wings suggestion. This seems more flexible over the long term, and more repeatable when required elsewhere along the line. And, it should allow for the development of modeling skills, albeit in smaller and more likely to be accomplished chunks! OK, enough theorizing...The sun is hitting the crest of the Ko'olaus, and it is time to get a train or two running in Olomana's shadow! Aloha, Eric
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Posted by PVT Kanaka on Sunday, July 23, 2017 2:39 AM

Tom,

For the moment, one section.  I had some slight settling elsewhere, but I just backfilled the whole area based on future plans of what I wanted to to in those spots.

In this area, our little guppy pond is in the center.  Along one side, I shored things up with broken concrete slabs, glued scale timbers to it, and called it a day.  Along another, I used a line of scale "boulders" to serve as a wall wall to hold up the gravel fill.  I nice grove of blue daze effectively does the same thing on the third side.  This side is the longest run of track, so I thought something a bit more permanent would be in order.  Been working on what that would be all afternoon and evening.

There is an overhead shot in my build log "Progress on the Triple " to orient yourself.  Oh, and issues with any site making its fair profit; I just am already paying for one site, and I have too many log-ins to remember as it is!

Thanks again for you very in depth answers.  Since the trains run fine, I am going to take a real stock of my options and resources before committing to any one course of action.

 

- Eric

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Posted by ttrigg on Sunday, July 23, 2017 1:02 AM

An after thought. You are currently concerned about one small section. How is the rest of your track doing? Look close, I'm sure you might find some settlement in other older areas with lesser subsidence. 

Tom Trigg

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Posted by ttrigg on Saturday, July 22, 2017 8:40 PM

PVT Kanaka

Oh, yeah, I also refuse to pay the Photobucket fee. Not sure what to do now for photo sharing. 

Photobucket, like other photo sharing sites is a business. Over the years I have had them make me some oversized prints of some of my photos, as a way of paying for their service. I already pay for two cloud storage sites and am not interested in paying for another.

Tom Trigg

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Posted by ttrigg on Saturday, July 22, 2017 8:30 PM

Eric

Sorry, but yep.

In order to completely defeat subsidence of track right of way one must go below the lowest known layer of decomposing green matter. Not knowing how much green matter is in your fill soil, I'm sure there is some, possibly up to 15~20%. If I recall correctly your buried your lawn under the empire. Look at a cross section of the average lawn. Below the grass line is the root zone 2 to 2 1/2 inches deep. Below that is a zone of decomposing older roots, another 2 or so inches. If your intent is to totally defeat subsidence you will need to go at least 6 inches below the grass line for support.

You are fighting two types of subsidence. First being the decomposition of green matter which depending upon the type of green matter, water content and aeration takes 6 to 10 years, possibly longer. Secondly, you have normal soil compaction, which will continue for a few hundred thousand years until it turns to rock. Even if you were to dig two feet below the grass line you will still experience subsidence in the neighborhood of a quarter inch per ten years. Subsidence is just something we learn to live with. Don't get too depressed and think all is lost. If you decide to go with a truss type bridge with cement piers reaching down about 5 inches or so into your fill soil your subsidence rate should drop to 1/4 inch or so per year. If the piers drop completely vertically all you would need to do would be to use timbers (wood shims) to level out the bridge every couple years. Every year the rate of subsidence will get a bit less and less.

My new "still under construction" empire is experiencing subsidence. 4 years ago I built a 4 foot retaining wall and put in about 36 inches of decomposed granite. Every year since I've hired local day laborers to add another 5 yards of DG about 2 inches. As it continues to compact by age the level gets a bit lower each year. A broken hip and couple surgeries have slowed construction a bit. I had it at 12 inches from being level full, added six more inches and still have 8 to go.

Most of us have just allowed subsidence to do its thing and add the task of re-ballasting the track yearly to raise track level. If I had your problem I would get some 1/2" or 3/4" coper pipe and add culverts before backfilling with ballast. I would then add some timber (or cement) header and wing walls to the pipe at least half inch above the new 'ballast slope line'. By 'cement' I mean mortar mix. Track running atop a levee or dike is very normal in the 1:1 scale.

Pro's and Con's: Lifting the rails by re-ballasting will take about half an hour and you are running trains again. Building a bridge. This is NOT a single day project. Digging shallow, depending upon available work time, could take a couple weeks of no trains. Digging deep could add another week or two.

Tom Trigg

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Posted by PVT Kanaka on Saturday, July 22, 2017 5:52 PM
Tom, lots to mull over...To be clear, do I have to dig down below the grass, or just into the raised bed? The GRR is about 2' off the ground, with the first 20" dirt, and the rest gravel to the top, except where our plantings have gone in. In the meantime, I have a few other repairs I am doing as I chew this over. Oh, yeah, I also refuse to pay the Photobucket fee. Not sure what to do now for photo sharing. Enjoy your weekend! Eric

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