The learning objectives for this webinar include:
- Recognize potential MSE wall applications for transportation facilities
- Understand the primary design considerations and select appropriate parameters for design
- To be able to check contractor submitted designs for MSE walls
- Select appropriate specification and contracting methods
- Identify appropriate construction inspection activities to confirm compliance with design
The design, construction and long-term stability monitoring of MSE walls continues to evolve as designers, researchers and specifiers push the leading edge of the technology and use more advanced geosynthetic materials and systems. At present, MSE walls represent more than half of all retaining walls used for transportation applications. MSE walls can offer some fairly significant advantages for the construction of transportation infrastructure. They are used to reduce or eliminate the need for the improvement of poor foundations where piles, caissons or other soils stabilization techniques would be required for the use of conventional reinforced concrete retaining walls. They are most commonly used as cost-effective solutions where the cost of fill, right-of-way or other restrictions require a steeper slope than is practically possible.
There are many type of MSE wall types categorized by the geometry of the reinforcement, mechanism used to transfer stress, the type of reinforcement material (metallic or non-metallic) and the type and geometry of the wall facing. This webinar provides a basic understanding of the type of MSE walls, their primary uses, key factors in their design and lessons learned from construction. A series of case studies provides the “good” the “bad” and the “ugly” experiences with the use of MSE walls along with key lessons learned for their long-term success.
Unique Features of the Course:
Case Studies, Examples and Lessons Learned
- Engineers involved in MSE wall design, construction and maintenance
- State DOT and municipal agency personnel who specify MSE walls
- Contractors interested in advancing the state of MSE construction technology
David Hein is a Principal Engineer and Vice-President of Transportation of Applied Research Associates, Inc in Toronto, Canada. He is responsible for the ARA Transportation Infrastructure Division with offices in Ontario, Texas, Illinois, Wisconsin, Florida and Pennsylvania. Mr. Hein has extensive experience with the design, evaluation and management of pavements ranging from low volume roadways to major highways and airports. He has been extensively involved in the design, construction and maintenance of permeable pavement systems and was the Principal Investigator for the National Cooperative Highway Research Program project NCHRP 25-25 Task 82 to determine the feasibility and provide guidelines for the use of permeable pavement for roadway shoulders. Other recent projects include the construction of a permeable municipal roadway in Berkeley California, permeable roadways for the Vancouver Olympic Village, parking area in Oahu, Hawaii and a permeable pavement capable of accommodating military tank traffic.
Mr. Hein has developed numerous tools and guidelines for the design and construction of permeable pavements including the Interlocking Concrete Pavement Institute’s Permeable DesignPro software application which is the most widely used tool for the design and construction of permeable interlocking concrete pavements. Mr. Hein is also the chair of an American Society of Civil Engineers committee that is currently developing a consensus standard for the design, construction and maintenance of permeable pavements.