Category: Construction
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Multi-Ringed Arches
While the typical stone arch bridge consists of an arch built with one ring of thick stones, it is possible to build a stone arch bridge with multiple arch rings to create a thick arch with relatively small stones.
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Retaining Walls: A Weak Point of Stone Bridges
Stone bridges use retaining walls as part of the structure to hold the roadway. These walls are a decided weakness, due to their relatively thin width. In this post we investigate these walls and related design possibilities.
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The Beauty of the Rubble Arch Bridge
Rubble masonry can be aesthetically more appealing than ashlar. While ashlar masonry consists of stone bricks, the variability of rubble masonry tends to reflect the properties of the local stone and hence blends with nature.
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Corbeled Pseudo-Arches
The corbeled arch is an interesting stone structure that relies on the cantilever principle for stability, and can be used in bridges. Though called an arch, it is not a true arch for it produces no thrust.
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The Catenary, Segmental Arches, and Roman Arches
Segmental arches have a certain strength that is due to the fact that they closely approximate a catenary. Thus, low-rise arches can be very thin and able to free-stand.
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Planning the Falsework
The formwork is important to arch building. It must be designed to handle the weight while maintaining the correct shape, and must be planned for easy removal without damaging the arch.
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Efficiently Designed Stone Culverts
Building stone arch culverts can be difficult to do without using a disproportionately large amount of material. In this post several ways the efficiency of design can be increased are discussed.
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Designing the Span
A wide variety of design options are available to the builder of a stone arch bridge. Here are some considerations that are helpful to keep in mind when narrowing down the design.
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Gothic Arches
The Gothic arch, despite being commonly associated with cathedrals, can still be found in stone arch bridges. Surprisingly, it is one of the easiest arches to build.