Karst-Related Experiences for a Highway Project in Southeastern Pennsylvania

摘要

This paper summarizes experiences from the design, construction and maintenance of US 202, Section 300, a major State Highway in Southeastern Pennsylvania. The bedrock at the project site is Karstic limestone and dolomite with well developed rock pinnacles. Historical sinkhole collapses were observed, documented, analyzed, field verified, and inventoried. Factors that might trigger sinkhole collapses were proposed. Based on the knowledge gained from the historical sinkhole data within the area and other projects near the area, methods to minimize sinkhole hazards were used in the highway geotechnical investigation and design.