Toland Road Seismic Analysis - Introduction
Dynamic Site Response Analysis and Design Methodology of a Geosynthetic Liner System For a Municipal Solid Waste Landfill Located in a High Seismic Risk Zone - A Case Study
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Introduction As remaining air-space in existing landfills becomes scarce, owners and operators are faced with the dilemma of having to construct geosynthetic-lined lateral expansions outside of their pre-1993 (Subtitle D) footprint. Some of these landfills are located within high seismic risk zones and require sophisticated design methodologies which must incorporate anticipated seismic forces, static and dynamic slope stability issues, and comprehensive geosynthetic material testing programs. The design engineer must integrate these concepts with available geosynthetic materials and construction techniques to produce design plans and specifications which will endure the regulatory review process and allow the operator to obtain the necessary permits. The engineer should follow through after construction with an operations plan specifying fill sequencing and other operational procedures to protect the liner and critical components of the leachate collection and removal system.CASE STUDY EBA designed, permitted and provided CQA and construction management services for the multi-phased, lined expansion of an existing Class III landfill located within a high seismic risk zone in Southern California. For various reasons, lined subgrade slopes had to be excavated into existing canyon walls at 1.5H:1V.EBA determined the Peak Ground Acceleration (PGA) at the site, performed slope stability and site response analyses, evaluated seismically induced displacement along the base liner, and tested and specified geosynthetic materials for the design. In the following case study, we present the methodologies used to perform these analyses to support design of the geosynthetic liner system. 
Toland Road Seismic Analysis - Table of Contents
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