Highway widening in Karst

摘要

The proposed widening of six-mile long section of a major highway in southeastern Pennsylvania involves up to 24 feet deep cuts in karst geology. About $25 million dollars were spent in repairing sinkholes during the widening and interchange improvement of an adjacent section of the same highway during 2000-01. This paper discusses the subsurface investigation and design approaches taken for proposed widening in the cut areas.