PYRAWALL® – The Most Durable Vegetated Wall Solution

This webcast aired on May 30, 2019


Balancing the required performance of an engineered solution with its environmental impact is becoming more and more critical. When constructing reinforced soil walls, hard structural facing panels and modular blocks have been the traditional choice for durability. However, the demand for green-friendly infrastructure continues to grow, leading engineers to look for ways to design these walls with vegetated facing.   PYRAWALL® offers an environmentally friendly and economical solution for constructing reinforced-soil walls and steepened slopes. The wrap-face vegetated system consists of PYRAMAT® 75 High Performance Turf Reinforcement Mat (HPTRM) and internal fiber-composite bracing deliver immediate erosion control protection that lasts up to 75 years. The flexibility of the system allows the engineer to incorporate various setbacks and alignments in order to customize the wall or slope to the unique site conditions and geometries.

In this webinar you will learn:
  • To understand the PYRAWALL engineered wrap-face vegetated solution and its applications
  • To gain a basic understanding of the site investigation and geotechnical design approach for this vegetated wall system
  • To become familiar with site preparation and installation of this wall system
  • To understand various methods for vegetating the wall system

Stanley M. Miller, PhD,PE

Stan Miller is a Professor Emeritus, Department of Civil Engineering, University of Idaho, and an independent engineering consultant. His work has focused on applied rock engineering, slope stabilization, geosynthetic-reinforced earth structures, and erosion/sediment control. Over the past 25 years, he has taught seminars on slope stabilization and segmental retaining walls in the U.S., Canada, and SE Asia (Malaysia and Singapore). Since 2001, he has served as co-instructor for the ASCE Continuing Education Seminar on “Soil and Rock Slope Stability”, which is taught several times each year. He earned his BS and MS degrees in Geological Engineering from the University of Arizona and his PhD degree from the University of Wyoming. He is a licensed Professional Engineer in several western states.

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Take the Quiz

1. A geosynthetic-reinforced soil structure with a face angle of 1H:2V (63o) is classified and designed as:

Which of the following is NOT true for traditional geotextile wrap-face systems?

3. Vegetated PYRAWALL systems are well-suited for:
4. The projected long-term durability and estimated 75-year life of exposed PYRAMAT-75 is based on:
5. Key components of the PYRAWALL system include:

What infill material may be added to the backfill directly behind the PYRAWALL face to aid vegetation:


For high PYRAWALL RSS and wall structures, the typical maximum vertical spacing of geogrid layers is:

8. Estimated geotechnical soil properties (such as unit weight, friction angle, & compaction characteristics) are needed for proper PYRAWALL design & construction, because the following must be analyzed:

Often on-site soils can be used for PYRAWALL backfill. Which of the following would NOT be acceptable:

10. Consider this statement: Vegetation can only be seeded or inserted to the PYRAWALL system during the construction of individual wrap lifts.
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