I am pondering how to design a single story raised earth dome (possibly with a cupola), keeping multi-disaster resistance in mind.
Would it be possible and beneficial to combine interlocking joints and a primary support as in the youtube examples below?
Regarding the main pillar in a structure being disassembled at 3:27 through 3:46 minute marks; then 4:29/interlocking technique:
Example with earthquake:
6:49 through 8:54 minute mark:
The attached image is what shaped up so far. Please pardon my ignorance. I'm learning a lot fast, but know little about construction. For now, this is about combining old time-proven ideas into a viable concept for current and future challenges. (What if nature sends F6 tornadoes and Cat 6 hurricanes to get the attention of people not paying attention?)
I am pondering multiple vertical walls working with movable levels or platform parts, resembling more the pagoda / earthquake example above. Might this be done so walls and levels counterbalance each other in varied directions to keep a structure intact?
Perhaps large bamboo filled with cob could fit into separate walls and levels so strategic points create interlocking joints?
Pertinent to multi-natural disaster resistance, the attached image shows very rough ideas.
Each dark green square represents 3'. I don't yet know how to depict a side view in LibreOffice Writer on Linux Mint Sylvia/Mate desktop.
I live in Florida and in most places here it makes more sense to build up, not dig down. Underground waterways course through most of Florida and it’s really a long skinny, shallow, floating shelf.
So, the outside of the outermost wall is 15' high at the top step. This outermost wall has a lower wall maybe 2' high around it that is not shown because it doesn't fit on the page. Between that 2' high wall and the 15' wall, Jerusalem artichoke or sunchoke for their deep taproots are planned between tall varieties of bamboo. That should keep bamboo from running wild while deep (choke) taproots protect the seating of the wall. What also is not shown because I don't know how, is each of the lines extending outward from the center create wall divisions or parts of each wall, so those can shift back and forth in an earthquake and to foretell where shift soil concerns may exist so those can be addressed as time moves along.
The white N S E W lines coming from the center of the image to outside the dome, are 3' wide downhill rubble trenches that extend past the outermost wall. That is not shown entirely because there is not enough room on the page. I’m not sure if extending these rubble trenches in so far is a good idea because flooding could send water inside and between the walls. Help or hindrance. Undecided. Or perhaps the innermost outer wall could be several feet deeper than the others?
Where each trench meets a wall, there are 4' x 3' platforms(?) between steps going down to the dome structure. This is space to keep and move things while working in areas of the inner garden terrace, which is also not shown entirely because all those lines make the drawing hard to look at with the grid background.
All the walls around the garden terrace are planned to be slanted to direct rain water for catchment and / or toward the N S E W rubble trenches.
Each small white circle is a bundle of large bamboo to form columns. There are sixteen such columns around the outer dome. There are eight such columns around the 15’ x 15’ center of the dome.
The brown N S E W lines between columns at the garden terrace and dome, are arches. I've looked at many and still not sure what kind yet. I am thinking the bottoms should flare outward some to help prevent toppling. If these are also curved vertically around the columns where they meet, these should help support the columns and the columns should help support the arches. I am thinking 1 inch or 2 inches of space between the arches and columns so there is room for shifting for counterbalancing.
Living space within the dome is divided into equal quarters. There are eight arches inside the dome, around the 15' x 15’ center which is also divided into 4 movable parts. Each arch is a doorway to a living space, so there are 2 doorways to each. Each arch is counterbalanced between columns.
If there is plumbing or electrical inside (not planning on it, only considering a possibility), then when the inner walls are being constructed and in place of conduit there could be an open / exposed dug-out-of-walls-just-deep-enough area for plumbing and electrical to fit into. I don't like the idea of indoor electrical and plumbing at the moment though because how to accommodate for shifting in an earthquake / tornado / hurricane has not come to mind. For the purposes of disaster resistance, both seem to invite dependencies rather than more permanent (in my perception to date) solutions toward a the smallest possible carbon footprint.
For windows, to diminish damage from debris (as with a hurricane or small tornado (we don't get big tornadoes here), perhaps two 1' x 4' windows in each wall section which would put 8 small taller-than-wide windows in each living space for light.
I like the idea of heavy pocket doors in the arches, but that would seem to diminish the strength of the arches. Or maybe it doesn’t. Undecided.
The circle in the center between the four living spaces, is intended to be a shelter, part of which is higher and part is lower. Then, hypothetically, it would be possible to move up or down as needed.
The height of the platform the dome will be placed on remains debatable, though currently I'm guessing no more than 3' feet above the height of the 15' outermost wall.
Not shown in either image, is a hill raised to be level with the 15' outer wall and adjoining that at a so far undecided place, to provide a protected under-raised-earth space for holding water for the garden terrace, washing, cooking, and bathing.
Codes for composting vary and mostly against. The ideal would be an unincorporated area property with codes favoring natural building. I dream.
Since focus is on natural disaster resistance and because currently I'm in Clearwater, Florida, the only escape from a tsunami would be sufficient warning to get out of the area. I've only been around for a few very small tsunamis and those devastated fishing and small businesses on the coastline. Not sure what to do about tsunamis. Move to another state?
This was a lot to read. Much thanks in advance for feedback and alternative ideas.
Wow...thank you, I have learned a lot watching your provided video.
I like how the floating central pillar works, and think that is just plain ingenious. But I also like the work Wheaton Labs and Paul Wheaton has done with Rock Jacks. This is more inline with fences, but it got me to wondering...could framing be used in a rock jack way so that the weight of rocks upon the outer rock jack framing, be secured to the inner framing of the home to help hold it in place with weight? If done right, it coud still "float" so movement in a earthquake could be minamalized, but at the same time, it is pretty difficult to drive a 2 x 4 through a rock-fortified home...unlike a home protected by vinyn siding, plywood, insulation and then drywall. (LOL)
I have always loved timber framed houses, and once made a set of timber framed kitchen cabinets. This gave me a problem though, because in a normal house, the frame is on the inside. But for kitchen cabinets, I wanted the frame to show, so I built it backwards. Timber framing (2x2's since it had to looked scaled down), were on the OUTSIDE of the kitchen cabinets. This provided ridgidity, but also the look I was after.
In a similar way, a timber framed house could be built. As an Earthquake occured, the outter frame would move in pendelum-like fashion and counteract the movement from the earthquake, and yet that same rock actiong as a counteracting pendelum would be defensive cladding from flying debris. It is possible that such a building would be earthquake, hurricane and tornado resistant. I mean it is a simple concept, if you cannot dig down into the earth as most stormshelters are, bring the protective rock in cladding around the building, and help hold it down by a mass that also moves!
There are lots of different structural ideas you are thinking about here, which may or may not work together to provide stability in various circumstances. Different types of structures will be best suited to different environments, so you need to define the conditions you are going to build in and prepare for. There is no universal best design for natural disaster resistance.
First off, any structure depends on its base, the earth beneath its foundation. Much of Florida is sand or sandy soil, I don't know how deep is typical, and this can shift drastically in an earthquake, even behaving as a liquid in some cases. Depending on the earth stabilizing the structure may not be wise there, rather, making a structure that is (flexibly) locked together may work best. Domes and arches depend on their bases staying put, or at least moving as a single unit. On the other hand, I haven't heard of earthquakes being a serious hazard in Florida, while wind and rain certainly are. Domes and arches can have tremendous stability against those forces, and independent movement provisions become relatively unimportant.
We can talk at endless length about various systems, but I think it would be more useful to first define what conditions you are preparing for, and then address specific characteristics of elements that help with those.
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