![]() ![]() A 60- to 80 lb.-bag of concrete mix costs $3 to $5 per bag. Concrete bag retaining wall costīuilding a 25’x3’ concrete bag retaining wall costs $360 to $600 in materials. Installation takes less time than on-site-built concrete walls. These factory-built panels require crane installation after delivery to the site. Concrete precast panel wall costīuilding a concrete precast panel wall costs $25 to $40 per square foot. Total costs depend on the size, foundation type, wall finish, and reinforcements. Large blocks are more difficult to transport but quicker to install with heavy machinery.Ī cinder-block retaining wall costs $60 to $210 per linear foot for 3’ to 6’ tall walls or $20 to $35 per square foot of surface area with backfill and footings. These larges blocks create a gravity wall, where the mass and weight of the blocks are self-supporting. Large concrete retaining wall block prices are $25 to $100 per block, depending on the size.īlock sizes are from 2’x2’x2’ to 6’x2’x2’ each. Large concrete retaining wall blocks costĬommercial or large concrete retaining wall blocks cost $60 to $270 per linear foot for 3’ to 6’ tall walls or $20 to $45 per square foot installed. Capable of supporting large surcharges in excess of 100 feet.These modular concrete blocks are quick to install with their mortar-less design as they stack together. ![]() Precast units are manufactured under strict quality control environments and tolerances to insure ease of installation.Self-supporting unit design and installation procedure minimizes heavy equipment usage and bracing requirements.Precast segmental arch units simplify shipping, delivery and installation.Finite element design provides for the development of the optimal shape based on loading conditions.MSE headwalls or wing walls are then installed as designed. The crown beam is cast along the top of the arch, locking both sides together. Geotextile or geomembrane is applied to the joints as designed. After the third unit is set, the arches are self-supported during the remainder construction. The arch units are set and grouted along the footing keyway in a staggered pattern. TechSpan construction starts with the installation of cast-in-place or precast footings on both sides. The arch units are typically eight to ten inches thick, and are custom designed for the application to minimize materials. MSE walls are easily customized and built at the ends of the arch tunnel, forming a standalone bridge, concrete tunnel, or hydraulic structure. TechSpan is a three-hinged precast concrete arch system, consisting of half arch units that meet at the crown, supported by precast or cast-in-place footings sized for site specific conditions. Tunnels for roadway, railway, pedestrian, and mining site reclaim or access. ![]() With accompanying retaining walls, the result is substantial load-carrying ability with minimal materials that provide efficient high-performance bridges, tunnels and other proven solutions for applications in roadways, railway, mining, military, and beyond.Īpplications of TechSpan Precast Arches include: Using reinforced precast concrete and a catalog of proven optimized shapes, RECo’s engineers design and manufacture the arch units based on the project’s loading and clearance requirements. RECo’s arch product, TechSpan®, exhibits this efficiency in design and construction. Visit to explore TechSpan using our interactive design tool. It allows for a very efficient design of the arch span, and use of materials that typically do not have a high tensile capacity. The overburden load is carried along the arch from the top down to both ends, in pure compression, with zero or minimal tension in the arch member. Materials and methods of design have evolved over the years, but the basic principles have remained the same. The engineering benefits of arches have been known for thousands of years, and explored most famously by the ancient Roman Empire. ![]()
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