Introducing Presto Geo P 3 : Expanding the Universe of Value Engineering Solutions Transportation + infrastructure
Using GEOWEB® Geocells for Load Support Calculations with the Presto Geo P 3 Portal Whether you're looking to strengthen an unpaved, granular road surface with enhanced water infiltration capabilities or provide robust base support for concrete or asphalt roads over soft soils, the GEOWEB System (geocells) is designed to meet your requirements. For unpaved roads the GEOWEB panels are compatible with a wide variety of infill materials including crushed aggregate, low cohesion granular materials such as sand, or even on-site salvaged materials. For flexible and rigid pavements, the GEOWEB System’s panels act as a strong base layer, bridging soft soils to reduce differential settlement and minimize surface degradation. Moreover, by harnessing the power of lateral confinement, the GEOWEB System can reduce cross-section thickness by as much as 50 percent–resulting in substantial project savings. Highways, ports and intermodal yards, and utility access roads are examples of common applications for the GEOWEB base stabilization solution. Geocells such as the GEOWEB System are designed following AASHTO standards for both granular surfaces and base support applications. These methods have been approved by the Federal Highway Administration and state DOTs, as well as the US Army Corps of Engineers. Simple Application of the Presto Geo P 3 Portal for Unpaved Emergency Access Road With growing infrastructure needs and increased climate considerations, being able to provide emergency vehicle access lanes is a huge consideration for new builds and rebuild projects. Utilizing a granular surface avoids the heat island effect, allows for water infiltration, and speeds construction time. The P 3 Project Planning Portal allows for several decisions, giving flexibility to meet site conditions and project criteria. Input options include the cross-section thickness, infill material parameters, strength of the native soil subgrade, and anticipated traffic loading. Additionally, there is an internal calculation that confirms that the selected inputs are within the acceptable mechanical properties of the GEOWEB panels. For an emergency access lane that will support fully loaded fire trucks, the main calculation page will include the following inputs: • Layer Type: Start with a 2-inch minimum wear surface, and a 6-inch deep GEOWEB panel. This will result in a total cross-section depth of 8 inches. The wear surface protects the GEOWEB panels from impact damage due to vehicle passes. A base layer can be added to improve the Factor of Safety if required.
Project planning and design requires a blend of professional judgment, cost estimating and schedule management skills, and an understanding of potential project risks. In consideration of these challenges, Presto Geosystems developed the Presto Geo P 3 Project Planning Portal, a free, web-based suite of geotechnical calculation tools designed to empower engineers and other project stakeholders in evaluating geosynthetic product solutions in accordance with their own project- specific timelines and needs. The P 3 Project Planning Portal is designed to help engineers, contractors, landscape architects, and project owners incorporate technical solutions including geocells, porous pavements, and reusable construction mats into project plans quickly and efficiently. The P 3 Project Planning Portal offers valuable insight to using unique value engineering products, including technical resources and supporting documentation. The Presto Geo P 3 Portal is specific to Presto Geosystems’ products and is based on full-scale testing by third-party experts. Concerns about tight deadlines, limited project information, or uncertainty about using “new-to-you” products are alleviated with this software. Veteran industry experts and first-time users alike will find this software sets a new standard in value engineering solutions.
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csengineermag.com
October 2023
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