Sometimes the most economical solution for a stream, roadway or rail crossing is to build an embankment over it. Using precast concrete arches, a stream crossing from 10 to 30 feet can easily be traversed with one arch segment. For wider crossings, multiple arch segments or larger arch products that span up to 100 feet are available.
The benefits of concrete arches accrue in both the near and long term:
No Maintenance – The system is a soil and concrete structure that eliminates bridge deck replacement, painting, and hazardous icing associated with bridges.
Environment Friendly – There is rarely a need to relocate streams or encroach on wetlands because our design-build approach carefully accommodates teh surrounding areas with the sequence of foundation building and arch placement.
Saved Time and Money – From the relatively simple design to the short construction sequence, the time required to design, get approval and install an arch system is up to 50 percent less than a comparable bridge span.
See how our design-build methodology has come into play on these projects with concrete arches:
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Foundation Support for Concrete Arch Systems
Most arches impose heavy foundation loads in areas adjacent to streams with relatively weak soils. On a design-build basis, our engineers and contractors work together to develop the solution that can support the typical loads of 25-50 kips per linear foot of arch length. From feasibility to final construction, you will quickly see how we optimize arch construction:
- • Minimized wetland encroachment – by allowing for the narrowest footing possible, there is less encroachment on wetlands and often a shorter arch span
- • Controlled total and differential settlement – with a stiffer and more uniform foundation, the total and differential settlement along the arch is greatly reduced
- • Saved time and money – the narrower footing and arch span means less material cost and time spent on construction.
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