Monthly Archives: February 2021

Designing Sustainable Ports & Yards with 3D Geocells

Stabilization for Higher-Performing Pavements Ports and intermodal yards in coastal areas are more prone to pavement problems due to inherent soft, unsupportive soils and high water levels. Heavy traffic patterns and the constant weight of loaded parked trailers and stacked containers at these facilities can accelerate the degradation of the paved or unpaved surfaces and subbase materials. The repeated pressure over poor soil conditions results in settlement, ruts, potholes, and even pavement failure. These surface problems require continual, costly maintenance and interruptions to facility operations. But the problem isn’t at the surface—it’s a base stabilization problem. Transforming Base Materials through 3D Confinement Creating and ensuring a stable surface supportive of the long-term, heavy traffic needs starts with better stabilization of the base materials. The GEOWEB® 3D Confinement System is built for this function. The system’s deep, cellular network controls both the horizontal and vertical movement of unstable base soils. When vertical loads are applied, active earth pressures in the loaded GEOWEB® cells push against passive earth pressures in adjacent cells to form a stable system. The benefits of confining fill are applied to both base reinforcement and unpaved surface applications. Permeable Unpaved Pavements Utilizing the GEOWEB® 3D system at the… Read more »

“Or Equal” Substitutions in Geosynthetics: Tips for Evaluating the Contractor’s Proposed Alternative

Written by: Michael J. Dickey, P.E., Director of Presto Geosystems Following the bid phase of a project, it is not uncommon for you as the specifying engineer or architect to receive a request from the awarded contractor to approve a proposed alternative geosynthetic product. This decision can ultimately have significant consequences, and with the allure of purported cost savings and a forthcoming notice-to-proceed, there can be tremendous pressure from the contractor and other project stakeholders to obtain quick approval. However, as the design professional, you bear the responsibility of assessing the risks and communicating how the proposed substitution could adversely impact the success of the project. To help you navigate the decision-making process and reduce headaches, we’ve compiled a list of tips to help keep your project on the path to success; while hopefully saving you time and preserving your sanity! Tip #1: Review the Product Spec Sheets Closely (Including Any Disclaimers) Many design professionals tend to focus on the numbers shown on a product spec sheet and may even have an implicit trust in the information provided. Unfortunately, some product providers will use this to their advantage. After an initial review of the product data, you will have a… Read more »